Run badger garbage collector periodically

.github/workflows/compile-shared-libraries.yml

@@ -0,0 +1,31 @@
+name: Cross-Compile Shared Libraries
+
+on:
+  workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v3
+
+      - name: Cross-Compile with xgo
+        uses: crazy-max/ghaction-xgo@e22d3c8b089adba750d5a74738b8e95d96f0c991 # v3.1.0
+        with:
+          xgo_version: latest
+          go_version: 1.24.0
+          dest: dist
+          pkg: sharedlibrary
+          prefix: cosmium
+          targets: linux/amd64,linux/arm64,windows/amd64,windows/arm64,darwin/amd64,darwin/arm64
+          v: true
+          buildmode: c-shared
+          buildvcs: true
+
+      - name: Upload artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: shared-libraries
+          path: dist/*

.github/workflows/release.yml

@@ -17,18 +17,34 @@ jobs:
         uses: actions/checkout@v4
         with:
           fetch-depth: 0
+
       - name: Set up Go
         uses: actions/setup-go@v5
         with:
-          go-version: 1.21.6
+          go-version: 1.24.0
+
+      - name: Cross-Compile with xgo
+        uses: crazy-max/ghaction-xgo@e22d3c8b089adba750d5a74738b8e95d96f0c991 # v3.1.0
+        with:
+          xgo_version: latest
+          go_version: 1.24.0
+          dest: sharedlibrary_dist
+          pkg: sharedlibrary
+          prefix: cosmium
+          targets: linux/amd64,linux/arm64,windows/amd64,windows/arm64,darwin/amd64,darwin/arm64
+          v: true
+          buildmode: c-shared
+          buildvcs: true
+
       - name: Docker Login
         uses: docker/login-action@v3
         with:
           registry: ghcr.io
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
+
       - name: Run GoReleaser
-        uses: goreleaser/goreleaser-action@v5
+        uses: goreleaser/goreleaser-action@5742e2a039330cbb23ebf35f046f814d4c6ff811 # v5
         with:
           distribution: goreleaser
           version: ${{ env.GITHUB_REF_NAME }}

.gitignore

@@ -1,4 +1,5 @@
 dist/
+sharedlibrary_dist/
 ignored/
 explorer_www/
 main

.goreleaser.yaml

@@ -1,5 +1,6 @@
 builds:
   - binary: cosmium
+    main: ./cmd/server
     goos:
       - darwin
       - linux
@@ -25,6 +26,23 @@ brews:
     commit_author:
       name: pikami
       email: git@pikami.org
+    skip_upload: auto
+
+archives:
+  - id: bundle
+    format: tar.gz
+    format_overrides:
+      - goos: windows
+        format: zip
+  - id: shared-libraries
+    meta: true
+    format: "tar.gz"
+    wrap_in_directory: true
+    name_template: "{{ .ProjectName }}_{{ .Version }}_shared-libraries"
+    files:
+    - LICENSE
+    - README.md
+    - sharedlibrary_dist/**
 
 dockers:
   - id: docker-linux-amd64
@@ -32,7 +50,6 @@ dockers:
     goarch: amd64
     image_templates:
     - "ghcr.io/pikami/{{ .ProjectName }}:{{ .Version }}-amd64"
-    - "ghcr.io/pikami/{{ .ProjectName }}:latest-amd64"
     dockerfile: Dockerfile
     use: buildx
     build_flag_templates:
@@ -50,9 +67,7 @@ dockers:
     goarch: arm64
     image_templates:
     - "ghcr.io/pikami/{{ .ProjectName }}:{{ .Version }}-arm64"
-    - "ghcr.io/pikami/{{ .ProjectName }}:latest-arm64"
     - "ghcr.io/pikami/{{ .ProjectName }}:{{ .Version }}-arm64v8"
-    - "ghcr.io/pikami/{{ .ProjectName }}:latest-arm64v8"
     dockerfile: Dockerfile
     use: buildx
     build_flag_templates:
@@ -65,18 +80,67 @@ dockers:
     - "--label=org.opencontainers.image.created={{.Date}}"
     - "--label=org.opencontainers.image.revision={{.FullCommit}}"
     - "--label=org.opencontainers.image.version={{.Version}}"
+  - id: docker-explorer-linux-amd64
+    goos: linux
+    goarch: amd64
+    image_templates:
+    - "ghcr.io/pikami/{{ .ProjectName }}:{{ .Version }}-explorer-amd64"
+    dockerfile: Explorer.Dockerfile
+    use: buildx
+    build_flag_templates:
+    - "--platform=linux/amd64"
+    - "--pull"
+    - "--label=org.opencontainers.image.title={{.ProjectName}}"
+    - "--label=org.opencontainers.image.description=Lightweight Cosmos DB emulator"
+    - "--label=org.opencontainers.image.url=https://github.com/pikami/cosmium"
+    - "--label=org.opencontainers.image.source=https://github.com/pikami/cosmium"
+    - "--label=org.opencontainers.image.created={{.Date}}"
+    - "--label=org.opencontainers.image.revision={{.FullCommit}}"
+    - "--label=org.opencontainers.image.version={{.Version}}"
+  - id: docker-explorer-linux-arm64
+    goos: linux
+    goarch: arm64
+    image_templates:
+    - "ghcr.io/pikami/{{ .ProjectName }}:{{ .Version }}-explorer-arm64"
+    - "ghcr.io/pikami/{{ .ProjectName }}:{{ .Version }}-explorer-arm64v8"
+    dockerfile: Explorer.Dockerfile
+    use: buildx
+    build_flag_templates:
+    - "--platform=linux/arm64"
+    - "--pull"
+    - "--label=org.opencontainers.image.title={{.ProjectName}}"
+    - "--label=org.opencontainers.image.description=Lightweight Cosmos DB emulator"
+    - "--label=org.opencontainers.image.url=https://github.com/pikami/cosmium"
+    - "--label=org.opencontainers.image.source=https://github.com/pikami/cosmium"
+    - "--label=org.opencontainers.image.created={{.Date}}"
+    - "--label=org.opencontainers.image.revision={{.FullCommit}}"
+    - "--label=org.opencontainers.image.version={{.Version}}"
 
 docker_manifests:
   - name_template: 'ghcr.io/pikami/{{ .ProjectName }}:latest'
-    image_templates:
+    skip_push: auto
-      - "ghcr.io/pikami/{{ .ProjectName }}:latest-amd64"
-      - "ghcr.io/pikami/{{ .ProjectName }}:latest-arm64"
-      - "ghcr.io/pikami/{{ .ProjectName }}:latest-arm64v8"
-  - name_template: 'ghcr.io/pikami/{{ .ProjectName }}:{{ .Version }}'
     image_templates:
       - "ghcr.io/pikami/{{ .ProjectName }}:{{ .Version }}-amd64"
       - "ghcr.io/pikami/{{ .ProjectName }}:{{ .Version }}-arm64"
       - "ghcr.io/pikami/{{ .ProjectName }}:{{ .Version }}-arm64v8"
+  - name_template: 'ghcr.io/pikami/{{ .ProjectName }}:{{ .Version }}'
+    skip_push: auto
+    image_templates:
+      - "ghcr.io/pikami/{{ .ProjectName }}:{{ .Version }}-amd64"
+      - "ghcr.io/pikami/{{ .ProjectName }}:{{ .Version }}-arm64"
+      - "ghcr.io/pikami/{{ .ProjectName }}:{{ .Version }}-arm64v8"
+  - name_template: 'ghcr.io/pikami/{{ .ProjectName }}:explorer'
+    skip_push: auto
+    image_templates:
+      - "ghcr.io/pikami/{{ .ProjectName }}:{{ .Version }}-explorer-amd64"
+      - "ghcr.io/pikami/{{ .ProjectName }}:{{ .Version }}-explorer-arm64"
+      - "ghcr.io/pikami/{{ .ProjectName }}:{{ .Version }}-explorer-arm64v8"
+  - name_template: 'ghcr.io/pikami/{{ .ProjectName }}:{{ .Version }}-explorer'
+    skip_push: auto
+    image_templates:
+      - "ghcr.io/pikami/{{ .ProjectName }}:{{ .Version }}-explorer-amd64"
+      - "ghcr.io/pikami/{{ .ProjectName }}:{{ .Version }}-explorer-arm64"
+      - "ghcr.io/pikami/{{ .ProjectName }}:{{ .Version }}-explorer-arm64v8"
 
 checksum:
   name_template: 'checksums.txt'

Dockerfile

@@ -1,4 +1,4 @@
-FROM scratch
+FROM alpine:latest
 
 WORKDIR /app
 COPY cosmium /app/cosmium

Explorer.Dockerfile

@@ -0,0 +1,9 @@
+FROM ghcr.io/cosmiumdev/cosmos-explorer-base:latest AS explorer-base
+FROM alpine:latest
+
+COPY --from=explorer-base /cosmos-explorer /cosmos-explorer
+
+WORKDIR /app
+COPY cosmium /app/cosmium
+
+ENTRYPOINT ["/app/cosmium", "-ExplorerDir", "/cosmos-explorer"]

Makefile

@@ -4,28 +4,69 @@ GOTEST=$(GOCMD) test
 GOCLEAN=$(GOCMD) clean
 
 BINARY_NAME=cosmium
+SERVER_LOCATION=./cmd/server
+
+SHARED_LIB_LOCATION=./sharedlibrary
+SHARED_LIB_OPT=-buildmode=c-shared
+XGO_TARGETS=linux/amd64,linux/arm64,windows/amd64,windows/arm64,darwin/amd64,darwin/arm64
+GOVERSION=1.24.0
 
 DIST_DIR=dist
 
+SHARED_LIB_TEST_CC=gcc
+SHARED_LIB_TEST_CFLAGS=-Wall -ldl
+SHARED_LIB_TEST_TARGET=$(DIST_DIR)/sharedlibrary_test
+SHARED_LIB_TEST_DIR=./sharedlibrary/tests
+SHARED_LIB_TEST_SOURCES=$(wildcard $(SHARED_LIB_TEST_DIR)/*.c)
+
 all: test build-all
 
-build-all: build-darwin-arm64 build-darwin-amd64 build-linux-amd64 build-windows-amd64
+build-all: build-darwin-arm64 build-darwin-amd64 build-linux-amd64 build-linux-arm64 build-windows-amd64 build-windows-arm64
 
 build-darwin-arm64:
 	@echo "Building macOS ARM binary..."
-	@GOOS=darwin GOARCH=arm64 $(GOBUILD) -o $(DIST_DIR)/$(BINARY_NAME)-darwin-arm64 .
+	@GOOS=darwin GOARCH=arm64 $(GOBUILD) -o $(DIST_DIR)/$(BINARY_NAME)-darwin-arm64 $(SERVER_LOCATION)
 
 build-darwin-amd64:
 	@echo "Building macOS x64 binary..."
-	@GOOS=darwin GOARCH=amd64 $(GOBUILD) -o $(DIST_DIR)/$(BINARY_NAME)-darwin-amd64 .
+	@GOOS=darwin GOARCH=amd64 $(GOBUILD) -o $(DIST_DIR)/$(BINARY_NAME)-darwin-amd64 $(SERVER_LOCATION)
 
 build-linux-amd64:
 	@echo "Building Linux x64 binary..."
-	@GOOS=linux GOARCH=amd64 $(GOBUILD) -o $(DIST_DIR)/$(BINARY_NAME)-linux-amd64 .
+	@GOOS=linux GOARCH=amd64 $(GOBUILD) -o $(DIST_DIR)/$(BINARY_NAME)-linux-amd64 $(SERVER_LOCATION)
+
+build-linux-arm64:
+	@echo "Building Linux ARM binary..."
+	@GOOS=linux GOARCH=arm64 $(GOBUILD) -o $(DIST_DIR)/$(BINARY_NAME)-linux-arm64 $(SERVER_LOCATION)
 
 build-windows-amd64:
 	@echo "Building Windows x64 binary..."
-	@GOOS=windows GOARCH=amd64 $(GOBUILD) -o $(DIST_DIR)/$(BINARY_NAME)-windows-amd64.exe .
+	@GOOS=windows GOARCH=amd64 $(GOBUILD) -o $(DIST_DIR)/$(BINARY_NAME)-windows-amd64.exe $(SERVER_LOCATION)
+
+build-windows-arm64:
+	@echo "Building Windows ARM binary..."
+	@GOOS=windows GOARCH=arm64 $(GOBUILD) -o $(DIST_DIR)/$(BINARY_NAME)-windows-arm64.exe $(SERVER_LOCATION)
+
+build-sharedlib-linux-amd64:
+	@echo "Building shared library for Linux x64..."
+	@GOOS=linux GOARCH=amd64 $(GOBUILD) $(SHARED_LIB_OPT) -o $(DIST_DIR)/$(BINARY_NAME)-linux-amd64.so $(SHARED_LIB_LOCATION)
+
+build-sharedlib-darwin-arm64:
+	@echo "Building shared library for macOS ARM..."
+	@GOOS=darwin GOARCH=arm64 $(GOBUILD) $(SHARED_LIB_OPT) -o $(DIST_DIR)/$(BINARY_NAME)-darwin-arm64.so $(SHARED_LIB_LOCATION)
+
+build-sharedlib-tests: build-sharedlib-linux-amd64
+	@echo "Building shared library tests..."
+	@$(SHARED_LIB_TEST_CC) $(SHARED_LIB_TEST_CFLAGS) -o $(SHARED_LIB_TEST_TARGET) $(SHARED_LIB_TEST_SOURCES)
+
+run-sharedlib-tests: build-sharedlib-tests
+	@echo "Running shared library tests..."
+	@$(SHARED_LIB_TEST_TARGET) $(DIST_DIR)/$(BINARY_NAME)-linux-amd64.so
+
+xgo-compile-sharedlib:
+	@echo "Building shared libraries using xgo..."
+	@mkdir -p $(DIST_DIR)
+	@xgo -targets=$(XGO_TARGETS) -go $(GOVERSION) -buildmode=c-shared -dest=$(DIST_DIR) -out=$(BINARY_NAME) -pkg=$(SHARED_LIB_LOCATION) .
 
 generate-parser-nosql:
 	pigeon -o ./parsers/nosql/nosql.go ./parsers/nosql/nosql.peg

README.md

@@ -26,9 +26,11 @@ You can download the latest version of Cosmium from the [GitHub Releases page](h
 Cosmium is available for the following platforms:
 
 - **Linux**: cosmium-linux-amd64
+- **Linux on ARM**: cosmium-linux-arm64
 - **macOS**: cosmium-darwin-amd64
 - **macOS on Apple Silicon**: cosmium-darwin-arm64
 - **Windows**: cosmium-windows-amd64.exe
+- **Windows on ARM**: cosmium-windows-arm64.exe
 
 ### Running Cosmium
 
@@ -48,10 +50,17 @@ AccountEndpoint=https://localhost:8081/;AccountKey=C2y6yDjf5/R+ob0N8A7Cgv30VRDJI
 
 If you want to run Cosmos DB Explorer alongside Cosmium, you'll need to build it yourself and point the `-ExplorerDir` argument to the dist directory. Please refer to the [Cosmos DB Explorer repository](https://github.com/Azure/cosmos-explorer) for instructions on building the application.
 
+There's also a prebuilt docker image that includes the explorer: `ghcr.io/pikami/cosmium:explorer`
+
 Once running, the explorer can be reached by navigating following URL: `https://127.0.0.1:8081/_explorer/` (might be different depending on your configuration).
 
 ### Running with docker (optional)
 
+There are two docker tags available:
+
+- ghcr.io/pikami/cosmium:latest - Cosmium core service
+- ghcr.io/pikami/cosmium:explorer - Cosmium with database explorer available on `https://127.0.0.1:8081/_explorer/`
+
 If you wan to run the application using docker, configure it using environment variables see example:
 
 ```sh
@@ -59,7 +68,7 @@ docker run --rm \
   -e COSMIUM_PERSIST=/save.json \
   -v ./save.json:/save.json \
   -p 8081:8081 \
-  ghcr.io/pikami/cosmium
+  ghcr.io/pikami/cosmium # or `ghcr.io/pikami/cosmium:explorer`
 ```
 
 ### SSL Certificate
@@ -76,7 +85,8 @@ To disable SSL and run Cosmium on HTTP instead, you can use the `-DisableTls` fl
 - **-InitialData**: Path to JSON containing initial state
 - **-Persist**: Saves data to the given path on application exit (When `-InitialData` argument is not supplied, it will try to load data from path supplied in `-Persist`)
 - **-Port**: Listen port (default 8081)
-- **-Debug**: Runs application in debug mode, this provides additional logging
+- **-LogLevel**: Sets the logging level (one of: debug, info, error, silent) (default info)
+- **-DataStore**: Allows selecting [storage backend](#data-storage-backends) (default "json")
 
 These arguments allow you to configure various aspects of Cosmium's behavior according to your requirements.
 
@@ -88,7 +98,19 @@ All mentioned arguments can also be set using environment variables:
 - **COSMIUM_INITIALDATA** for `-InitialData`
 - **COSMIUM_PERSIST** for `-Persist`
 - **COSMIUM_PORT** for `-Port`
-- **COSMIUM_DEBUG** for `-Debug`
+- **COSMIUM_LOGLEVEL** for `-LogLevel`
+
+### Data Storage Backends
+
+Cosmium supports multiple storage backends for saving, loading, and managing data at runtime.
+
+| Backend  | Storage Location         | Write Behavior           | Memory Usage         | Supports Initial JSON Load |
+|----------|--------------------------|--------------------------|----------------------|----------------------------|
+| `json` (default) | JSON file on disk 📄 | On application exit ⏳ | 🛑 More than Badger | ✅ Yes                      |
+| `badger`  | BadgerDB database on disk ⚡ | Immediately on write 🚀 | ✅ Less than JSON  | ❌ No                       |
+
+
+The `badger` backend is generally recommended as it uses less memory and writes data to disk immediately. However, if you need to load initial data from a JSON file, use the `json` backend.
 
 # License
 

api/api_models/models.go

@@ -0,0 +1,24 @@
+package apimodels
+
+const (
+	BatchOperationTypeCreate  = "Create"
+	BatchOperationTypeDelete  = "Delete"
+	BatchOperationTypeReplace = "Replace"
+	BatchOperationTypeUpsert  = "Upsert"
+	BatchOperationTypeRead    = "Read"
+	BatchOperationTypePatch   = "Patch"
+)
+
+type BatchOperation struct {
+	OperationType string                 `json:"operationType"`
+	Id            string                 `json:"id"`
+	ResourceBody  map[string]interface{} `json:"resourceBody"`
+}
+
+type BatchOperationResult struct {
+	StatusCode    int                    `json:"statusCode"`
+	RequestCharge float64                `json:"requestCharge"`
+	ResourceBody  map[string]interface{} `json:"resourceBody"`
+	Etag          string                 `json:"etag"`
+	Message       string                 `json:"message"`
+}

api/api_server.go

@@ -0,0 +1,39 @@
+package api
+
+import (
+	"github.com/gin-gonic/gin"
+	"github.com/pikami/cosmium/api/config"
+	"github.com/pikami/cosmium/internal/datastore"
+)
+
+type ApiServer struct {
+	stopServer       chan interface{}
+	onServerShutdown chan interface{}
+	isActive         bool
+	router           *gin.Engine
+	config           *config.ServerConfig
+}
+
+func NewApiServer(dataStore datastore.DataStore, config *config.ServerConfig) *ApiServer {
+	stopChan := make(chan interface{})
+	onServerShutdownChan := make(chan interface{})
+
+	apiServer := &ApiServer{
+		stopServer:       stopChan,
+		onServerShutdown: onServerShutdownChan,
+		config:           config,
+	}
+
+	apiServer.CreateRouter(dataStore)
+
+	return apiServer
+}
+
+func (s *ApiServer) GetRouter() *gin.Engine {
+	return s.router
+}
+
+func (s *ApiServer) Stop() {
+	s.stopServer <- true
+	<-s.onServerShutdown
+}

api/config/config.go

@@ -5,6 +5,8 @@ import (
 	"fmt"
 	"os"
 	"strings"
+
+	"github.com/pikami/cosmium/internal/logger"
 )
 
 const (
@@ -13,9 +15,12 @@ const (
 	ExplorerBaseUrlLocation = "/_explorer"
 )
 
-var Config = ServerConfig{}
+const (
+	DataStoreJson   = "json"
+	DataStoreBadger = "badger"
+)
 
-func ParseFlags() {
+func ParseFlags() ServerConfig {
 	host := flag.String("Host", "localhost", "Hostname")
 	port := flag.Int("Port", 8081, "Listen port")
 	explorerPath := flag.String("ExplorerDir", "", "Path to cosmos-explorer files")
@@ -26,27 +31,86 @@ func ParseFlags() {
 	disableAuthentication := flag.Bool("DisableAuth", false, "Disable authentication")
 	disableTls := flag.Bool("DisableTls", false, "Disable TLS, serve over HTTP")
 	persistDataPath := flag.String("Persist", "", "Saves data to given path on application exit")
-	debug := flag.Bool("Debug", false, "Runs application in debug mode, this provides additional logging")
+	logLevel := NewEnumValue("info", []string{"debug", "info", "error", "silent"})
+	flag.Var(logLevel, "LogLevel", fmt.Sprintf("Sets the logging level %s", logLevel.AllowedValuesList()))
+	dataStore := NewEnumValue("json", []string{DataStoreJson, DataStoreBadger})
+	flag.Var(dataStore, "DataStore", fmt.Sprintf("Sets the data store %s", dataStore.AllowedValuesList()))
 
 	flag.Parse()
 	setFlagsFromEnvironment()
 
-	Config.Host = *host
+	config := ServerConfig{}
-	Config.Port = *port
+	config.Host = *host
-	Config.ExplorerPath = *explorerPath
+	config.Port = *port
-	Config.TLS_CertificatePath = *tlsCertificatePath
+	config.ExplorerPath = *explorerPath
-	Config.TLS_CertificateKey = *tlsCertificateKey
+	config.TLS_CertificatePath = *tlsCertificatePath
-	Config.InitialDataFilePath = *initialDataPath
+	config.TLS_CertificateKey = *tlsCertificateKey
-	Config.PersistDataFilePath = *persistDataPath
+	config.InitialDataFilePath = *initialDataPath
-	Config.DisableAuth = *disableAuthentication
+	config.PersistDataFilePath = *persistDataPath
-	Config.DisableTls = *disableTls
+	config.DisableAuth = *disableAuthentication
-	Config.Debug = *debug
+	config.DisableTls = *disableTls
+	config.AccountKey = *accountKey
+	config.LogLevel = logLevel.value
+	config.DataStore = dataStore.value
 
-	Config.DatabaseAccount = Config.Host
+	config.PopulateCalculatedFields()
-	Config.DatabaseDomain = Config.Host
+
-	Config.DatabaseEndpoint = fmt.Sprintf("https://%s:%d/", Config.Host, Config.Port)
+	return config
-	Config.AccountKey = *accountKey
+}
-	Config.ExplorerBaseUrlLocation = ExplorerBaseUrlLocation
+
+func (c *ServerConfig) PopulateCalculatedFields() {
+	c.DatabaseAccount = c.Host
+	c.DatabaseDomain = c.Host
+	c.DatabaseEndpoint = fmt.Sprintf("https://%s:%d/", c.Host, c.Port)
+	c.ExplorerBaseUrlLocation = ExplorerBaseUrlLocation
+
+	switch c.LogLevel {
+	case "debug":
+		logger.SetLogLevel(logger.LogLevelDebug)
+	case "info":
+		logger.SetLogLevel(logger.LogLevelInfo)
+	case "error":
+		logger.SetLogLevel(logger.LogLevelError)
+	case "silent":
+		logger.SetLogLevel(logger.LogLevelSilent)
+	default:
+		logger.SetLogLevel(logger.LogLevelInfo)
+	}
+
+	fileInfo, err := os.Stat(c.PersistDataFilePath)
+	if c.PersistDataFilePath != "" && !os.IsNotExist(err) {
+		if err != nil {
+			logger.ErrorLn("Failed to get file info for persist path:", err)
+			os.Exit(1)
+		}
+
+		if c.DataStore == DataStoreJson && fileInfo.IsDir() {
+			logger.ErrorLn("--Persist cannot be a directory when using json data store")
+			os.Exit(1)
+		}
+
+		if c.DataStore == DataStoreBadger && !fileInfo.IsDir() {
+			logger.ErrorLn("--Persist must be a directory when using Badger data store")
+			os.Exit(1)
+		}
+	}
+
+	if c.DataStore == DataStoreBadger && c.InitialDataFilePath != "" {
+		logger.ErrorLn("InitialData option is currently not supported with Badger data store")
+		os.Exit(1)
+	}
+}
+
+func (c *ServerConfig) ApplyDefaultsToEmptyFields() {
+	if c.Host == "" {
+		c.Host = "localhost"
+	}
+	if c.Port == 0 {
+		c.Port = 8081
+	}
+	if c.AccountKey == "" {
+		c.AccountKey = DefaultAccountKey
+	}
 }
 
 func setFlagsFromEnvironment() (err error) {

api/config/enumFlag.go

@@ -0,0 +1,36 @@
+package config
+
+import (
+	"fmt"
+	"strings"
+)
+
+type EnumValue struct {
+	allowedValues []string
+	value         string
+}
+
+func (e *EnumValue) String() string {
+	return e.value
+}
+
+func (e *EnumValue) Set(v string) error {
+	for _, allowed := range e.allowedValues {
+		if v == allowed {
+			e.value = v
+			return nil
+		}
+	}
+	return fmt.Errorf("invalid value %q, must be one of: %s", v, strings.Join(e.allowedValues, ", "))
+}
+
+func NewEnumValue(defaultValue string, allowedValues []string) *EnumValue {
+	return &EnumValue{
+		allowedValues: allowedValues,
+		value:         defaultValue,
+	}
+}
+
+func (e *EnumValue) AllowedValuesList() string {
+	return fmt.Sprintf("(one of: %s)", strings.Join(e.allowedValues, ", "))
+}

api/config/models.go

@@ -1,20 +1,22 @@
 package config
 
 type ServerConfig struct {
-	DatabaseAccount  string
+	DatabaseAccount  string `json:"databaseAccount"`
-	DatabaseDomain   string
+	DatabaseDomain   string `json:"databaseDomain"`
-	DatabaseEndpoint string
+	DatabaseEndpoint string `json:"databaseEndpoint"`
-	AccountKey       string
+	AccountKey       string `json:"accountKey"`
 
-	ExplorerPath            string
+	ExplorerPath            string `json:"explorerPath"`
-	Port                    int
+	Port                    int    `json:"port"`
-	Host                    string
+	Host                    string `json:"host"`
-	TLS_CertificatePath     string
+	TLS_CertificatePath     string `json:"tlsCertificatePath"`
-	TLS_CertificateKey      string
+	TLS_CertificateKey      string `json:"tlsCertificateKey"`
-	InitialDataFilePath     string
+	InitialDataFilePath     string `json:"initialDataFilePath"`
-	PersistDataFilePath     string
+	PersistDataFilePath     string `json:"persistDataFilePath"`
-	DisableAuth             bool
+	DisableAuth             bool   `json:"disableAuth"`
-	DisableTls              bool
+	DisableTls              bool   `json:"disableTls"`
-	Debug                   bool
+	LogLevel                string `json:"logLevel"`
-	ExplorerBaseUrlLocation string
+	ExplorerBaseUrlLocation string `json:"explorerBaseUrlLocation"`
+
+	DataStore string `json:"dataStore"`
 }

api/handlers/collections.go

@@ -5,16 +5,16 @@ import (
 	"net/http"
 
 	"github.com/gin-gonic/gin"
-	"github.com/pikami/cosmium/internal/repositories"
+	"github.com/pikami/cosmium/internal/constants"
-	repositorymodels "github.com/pikami/cosmium/internal/repository_models"
+	"github.com/pikami/cosmium/internal/datastore"
 )
 
-func GetAllCollections(c *gin.Context) {
+func (h *Handlers) GetAllCollections(c *gin.Context) {
 	databaseId := c.Param("databaseId")
 
-	collections, status := repositories.GetAllCollections(databaseId)
+	collections, status := h.dataStore.GetAllCollections(databaseId)
-	if status == repositorymodels.StatusOk {
+	if status == datastore.StatusOk {
-		database, _ := repositories.GetDatabase(databaseId)
+		database, _ := h.dataStore.GetDatabase(databaseId)
 
 		c.Header("x-ms-item-count", fmt.Sprintf("%d", len(collections)))
 		c.IndentedJSON(http.StatusOK, gin.H{
@@ -25,48 +25,48 @@ func GetAllCollections(c *gin.Context) {
 		return
 	}
 
-	c.IndentedJSON(http.StatusInternalServerError, gin.H{"message": "Unknown error"})
+	c.IndentedJSON(http.StatusInternalServerError, constants.UnknownErrorResponse)
 }
 
-func GetCollection(c *gin.Context) {
+func (h *Handlers) GetCollection(c *gin.Context) {
 	databaseId := c.Param("databaseId")
 	id := c.Param("collId")
 
-	collection, status := repositories.GetCollection(databaseId, id)
+	collection, status := h.dataStore.GetCollection(databaseId, id)
-	if status == repositorymodels.StatusOk {
+	if status == datastore.StatusOk {
 		c.IndentedJSON(http.StatusOK, collection)
 		return
 	}
 
-	if status == repositorymodels.StatusNotFound {
+	if status == datastore.StatusNotFound {
-		c.IndentedJSON(http.StatusNotFound, gin.H{"message": "NotFound"})
+		c.IndentedJSON(http.StatusNotFound, constants.NotFoundResponse)
 		return
 	}
 
-	c.IndentedJSON(http.StatusInternalServerError, gin.H{"message": "Unknown error"})
+	c.IndentedJSON(http.StatusInternalServerError, constants.UnknownErrorResponse)
 }
 
-func DeleteCollection(c *gin.Context) {
+func (h *Handlers) DeleteCollection(c *gin.Context) {
 	databaseId := c.Param("databaseId")
 	id := c.Param("collId")
 
-	status := repositories.DeleteCollection(databaseId, id)
+	status := h.dataStore.DeleteCollection(databaseId, id)
-	if status == repositorymodels.StatusOk {
+	if status == datastore.StatusOk {
 		c.Status(http.StatusNoContent)
 		return
 	}
 
-	if status == repositorymodels.StatusNotFound {
+	if status == datastore.StatusNotFound {
-		c.IndentedJSON(http.StatusNotFound, gin.H{"message": "NotFound"})
+		c.IndentedJSON(http.StatusNotFound, constants.NotFoundResponse)
 		return
 	}
 
-	c.IndentedJSON(http.StatusInternalServerError, gin.H{"message": "Unknown error"})
+	c.IndentedJSON(http.StatusInternalServerError, constants.UnknownErrorResponse)
 }
 
-func CreateCollection(c *gin.Context) {
+func (h *Handlers) CreateCollection(c *gin.Context) {
 	databaseId := c.Param("databaseId")
-	var newCollection repositorymodels.Collection
+	var newCollection datastore.Collection
 
 	if err := c.BindJSON(&newCollection); err != nil {
 		c.JSON(http.StatusBadRequest, gin.H{"message": err.Error()})
@@ -74,20 +74,20 @@ func CreateCollection(c *gin.Context) {
 	}
 
 	if newCollection.ID == "" {
-		c.JSON(http.StatusBadRequest, gin.H{"message": "BadRequest"})
+		c.JSON(http.StatusBadRequest, constants.BadRequestResponse)
 		return
 	}
 
-	createdCollection, status := repositories.CreateCollection(databaseId, newCollection)
+	createdCollection, status := h.dataStore.CreateCollection(databaseId, newCollection)
-	if status == repositorymodels.Conflict {
+	if status == datastore.Conflict {
-		c.IndentedJSON(http.StatusConflict, gin.H{"message": "Conflict"})
+		c.IndentedJSON(http.StatusConflict, constants.ConflictResponse)
 		return
 	}
 
-	if status == repositorymodels.StatusOk {
+	if status == datastore.StatusOk {
 		c.IndentedJSON(http.StatusCreated, createdCollection)
 		return
 	}
 
-	c.IndentedJSON(http.StatusInternalServerError, gin.H{"message": "Unknown error"})
+	c.IndentedJSON(http.StatusInternalServerError, constants.UnknownErrorResponse)
 }

api/handlers/cosmium.go

@@ -4,15 +4,14 @@ import (
 	"net/http"
 
 	"github.com/gin-gonic/gin"
-	"github.com/pikami/cosmium/internal/repositories"
 )
 
-func CosmiumExport(c *gin.Context) {
+func (h *Handlers) CosmiumExport(c *gin.Context) {
-	repositoryState, err := repositories.GetState()
+	dataStoreState, err := h.dataStore.DumpToJson()
 	if err != nil {
 		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
 		return
 	}
 
-	c.Data(http.StatusOK, "application/json", []byte(repositoryState))
+	c.Data(http.StatusOK, "application/json", []byte(dataStoreState))
 }

api/handlers/databases.go

@@ -5,13 +5,13 @@ import (
 	"net/http"
 
 	"github.com/gin-gonic/gin"
-	"github.com/pikami/cosmium/internal/repositories"
+	"github.com/pikami/cosmium/internal/constants"
-	repositorymodels "github.com/pikami/cosmium/internal/repository_models"
+	"github.com/pikami/cosmium/internal/datastore"
 )
 
-func GetAllDatabases(c *gin.Context) {
+func (h *Handlers) GetAllDatabases(c *gin.Context) {
-	databases, status := repositories.GetAllDatabases()
+	databases, status := h.dataStore.GetAllDatabases()
-	if status == repositorymodels.StatusOk {
+	if status == datastore.StatusOk {
 		c.Header("x-ms-item-count", fmt.Sprintf("%d", len(databases)))
 		c.IndentedJSON(http.StatusOK, gin.H{
 			"_rid":      "",
@@ -21,45 +21,45 @@ func GetAllDatabases(c *gin.Context) {
 		return
 	}
 
-	c.IndentedJSON(http.StatusInternalServerError, gin.H{"message": "Unknown error"})
+	c.IndentedJSON(http.StatusInternalServerError, constants.UnknownErrorResponse)
 }
 
-func GetDatabase(c *gin.Context) {
+func (h *Handlers) GetDatabase(c *gin.Context) {
 	id := c.Param("databaseId")
 
-	database, status := repositories.GetDatabase(id)
+	database, status := h.dataStore.GetDatabase(id)
-	if status == repositorymodels.StatusOk {
+	if status == datastore.StatusOk {
 		c.IndentedJSON(http.StatusOK, database)
 		return
 	}
 
-	if status == repositorymodels.StatusNotFound {
+	if status == datastore.StatusNotFound {
-		c.IndentedJSON(http.StatusNotFound, gin.H{"message": "NotFound"})
+		c.IndentedJSON(http.StatusNotFound, constants.NotFoundResponse)
 		return
 	}
 
-	c.IndentedJSON(http.StatusInternalServerError, gin.H{"message": "Unknown error"})
+	c.IndentedJSON(http.StatusInternalServerError, constants.UnknownErrorResponse)
 }
 
-func DeleteDatabase(c *gin.Context) {
+func (h *Handlers) DeleteDatabase(c *gin.Context) {
 	id := c.Param("databaseId")
 
-	status := repositories.DeleteDatabase(id)
+	status := h.dataStore.DeleteDatabase(id)
-	if status == repositorymodels.StatusOk {
+	if status == datastore.StatusOk {
 		c.Status(http.StatusNoContent)
 		return
 	}
 
-	if status == repositorymodels.StatusNotFound {
+	if status == datastore.StatusNotFound {
-		c.IndentedJSON(http.StatusNotFound, gin.H{"message": "NotFound"})
+		c.IndentedJSON(http.StatusNotFound, constants.NotFoundResponse)
 		return
 	}
 
-	c.IndentedJSON(http.StatusInternalServerError, gin.H{"message": "Unknown error"})
+	c.IndentedJSON(http.StatusInternalServerError, constants.UnknownErrorResponse)
 }
 
-func CreateDatabase(c *gin.Context) {
+func (h *Handlers) CreateDatabase(c *gin.Context) {
-	var newDatabase repositorymodels.Database
+	var newDatabase datastore.Database
 
 	if err := c.BindJSON(&newDatabase); err != nil {
 		c.JSON(http.StatusBadRequest, gin.H{"message": err.Error()})
@@ -67,20 +67,20 @@ func CreateDatabase(c *gin.Context) {
 	}
 
 	if newDatabase.ID == "" {
-		c.JSON(http.StatusBadRequest, gin.H{"message": "BadRequest"})
+		c.JSON(http.StatusBadRequest, constants.BadRequestResponse)
 		return
 	}
 
-	createdDatabase, status := repositories.CreateDatabase(newDatabase)
+	createdDatabase, status := h.dataStore.CreateDatabase(newDatabase)
-	if status == repositorymodels.Conflict {
+	if status == datastore.Conflict {
-		c.IndentedJSON(http.StatusConflict, gin.H{"message": "Conflict"})
+		c.IndentedJSON(http.StatusConflict, constants.ConflictResponse)
 		return
 	}
 
-	if status == repositorymodels.StatusOk {
+	if status == datastore.StatusOk {
 		c.IndentedJSON(http.StatusCreated, createdDatabase)
 		return
 	}
 
-	c.IndentedJSON(http.StatusInternalServerError, gin.H{"message": "Unknown error"})
+	c.IndentedJSON(http.StatusInternalServerError, constants.UnknownErrorResponse)
 }

api/handlers/documents.go

@@ -6,21 +6,25 @@ import (
 	"net/http"
 	"strconv"
 
-	jsonpatch "github.com/evanphx/json-patch/v5"
+	jsonpatch "github.com/cosmiumdev/json-patch/v5"
 	"github.com/gin-gonic/gin"
+	apimodels "github.com/pikami/cosmium/api/api_models"
 	"github.com/pikami/cosmium/internal/constants"
+	"github.com/pikami/cosmium/internal/converters"
+	"github.com/pikami/cosmium/internal/datastore"
 	"github.com/pikami/cosmium/internal/logger"
-	"github.com/pikami/cosmium/internal/repositories"
+	"github.com/pikami/cosmium/parsers"
-	repositorymodels "github.com/pikami/cosmium/internal/repository_models"
+	"github.com/pikami/cosmium/parsers/nosql"
+	memoryexecutor "github.com/pikami/cosmium/query_executors/memory_executor"
 )
 
-func GetAllDocuments(c *gin.Context) {
+func (h *Handlers) GetAllDocuments(c *gin.Context) {
 	databaseId := c.Param("databaseId")
 	collectionId := c.Param("collId")
 
-	documents, status := repositories.GetAllDocuments(databaseId, collectionId)
+	documents, status := h.dataStore.GetAllDocuments(databaseId, collectionId)
-	if status == repositorymodels.StatusOk {
+	if status == datastore.StatusOk {
-		collection, _ := repositories.GetCollection(databaseId, collectionId)
+		collection, _ := h.dataStore.GetCollection(databaseId, collectionId)
 
 		c.Header("x-ms-item-count", fmt.Sprintf("%d", len(documents)))
 		c.IndentedJSON(http.StatusOK, gin.H{
@@ -31,49 +35,49 @@ func GetAllDocuments(c *gin.Context) {
 		return
 	}
 
-	c.IndentedJSON(http.StatusInternalServerError, gin.H{"message": "Unknown error"})
+	c.IndentedJSON(http.StatusInternalServerError, constants.UnknownErrorResponse)
 }
 
-func GetDocument(c *gin.Context) {
+func (h *Handlers) GetDocument(c *gin.Context) {
 	databaseId := c.Param("databaseId")
 	collectionId := c.Param("collId")
 	documentId := c.Param("docId")
 
-	document, status := repositories.GetDocument(databaseId, collectionId, documentId)
+	document, status := h.dataStore.GetDocument(databaseId, collectionId, documentId)
-	if status == repositorymodels.StatusOk {
+	if status == datastore.StatusOk {
 		c.IndentedJSON(http.StatusOK, document)
 		return
 	}
 
-	if status == repositorymodels.StatusNotFound {
+	if status == datastore.StatusNotFound {
-		c.IndentedJSON(http.StatusNotFound, gin.H{"message": "NotFound"})
+		c.IndentedJSON(http.StatusNotFound, constants.NotFoundResponse)
 		return
 	}
 
-	c.IndentedJSON(http.StatusInternalServerError, gin.H{"message": "Unknown error"})
+	c.IndentedJSON(http.StatusInternalServerError, constants.UnknownErrorResponse)
 }
 
-func DeleteDocument(c *gin.Context) {
+func (h *Handlers) DeleteDocument(c *gin.Context) {
 	databaseId := c.Param("databaseId")
 	collectionId := c.Param("collId")
 	documentId := c.Param("docId")
 
-	status := repositories.DeleteDocument(databaseId, collectionId, documentId)
+	status := h.dataStore.DeleteDocument(databaseId, collectionId, documentId)
-	if status == repositorymodels.StatusOk {
+	if status == datastore.StatusOk {
 		c.Status(http.StatusNoContent)
 		return
 	}
 
-	if status == repositorymodels.StatusNotFound {
+	if status == datastore.StatusNotFound {
-		c.IndentedJSON(http.StatusNotFound, gin.H{"message": "NotFound"})
+		c.IndentedJSON(http.StatusNotFound, constants.NotFoundResponse)
 		return
 	}
 
-	c.IndentedJSON(http.StatusInternalServerError, gin.H{"message": "Unknown error"})
+	c.IndentedJSON(http.StatusInternalServerError, constants.UnknownErrorResponse)
 }
 
-// TODO: Maybe move "replace" logic to repository
+// TODO: Maybe move "replace" logic to data store
-func ReplaceDocument(c *gin.Context) {
+func (h *Handlers) ReplaceDocument(c *gin.Context) {
 	databaseId := c.Param("databaseId")
 	collectionId := c.Param("collId")
 	documentId := c.Param("docId")
@@ -84,34 +88,34 @@ func ReplaceDocument(c *gin.Context) {
 		return
 	}
 
-	status := repositories.DeleteDocument(databaseId, collectionId, documentId)
+	status := h.dataStore.DeleteDocument(databaseId, collectionId, documentId)
-	if status == repositorymodels.StatusNotFound {
+	if status == datastore.StatusNotFound {
-		c.IndentedJSON(http.StatusNotFound, gin.H{"message": "NotFound"})
+		c.IndentedJSON(http.StatusNotFound, constants.NotFoundResponse)
 		return
 	}
 
-	createdDocument, status := repositories.CreateDocument(databaseId, collectionId, requestBody)
+	createdDocument, status := h.dataStore.CreateDocument(databaseId, collectionId, requestBody)
-	if status == repositorymodels.Conflict {
+	if status == datastore.Conflict {
-		c.IndentedJSON(http.StatusConflict, gin.H{"message": "Conflict"})
+		c.IndentedJSON(http.StatusConflict, constants.ConflictResponse)
 		return
 	}
 
-	if status == repositorymodels.StatusOk {
+	if status == datastore.StatusOk {
 		c.IndentedJSON(http.StatusCreated, createdDocument)
 		return
 	}
 
-	c.IndentedJSON(http.StatusInternalServerError, gin.H{"message": "Unknown error"})
+	c.IndentedJSON(http.StatusInternalServerError, constants.UnknownErrorResponse)
 }
 
-func PatchDocument(c *gin.Context) {
+func (h *Handlers) PatchDocument(c *gin.Context) {
 	databaseId := c.Param("databaseId")
 	collectionId := c.Param("collId")
 	documentId := c.Param("docId")
 
-	document, status := repositories.GetDocument(databaseId, collectionId, documentId)
+	document, status := h.dataStore.GetDocument(databaseId, collectionId, documentId)
-	if status == repositorymodels.StatusNotFound {
+	if status == datastore.StatusNotFound {
-		c.IndentedJSON(http.StatusNotFound, gin.H{"message": "NotFound"})
+		c.IndentedJSON(http.StatusNotFound, constants.NotFoundResponse)
 		return
 	}
 
@@ -136,7 +140,7 @@ func PatchDocument(c *gin.Context) {
 
 	currentDocumentBytes, err := json.Marshal(document)
 	if err != nil {
-		logger.Error("Failed to marshal existing document:", err)
+		logger.ErrorLn("Failed to marshal existing document:", err)
 		c.JSON(http.StatusInternalServerError, gin.H{"message": "Failed to marshal existing document"})
 		return
 	}
@@ -150,7 +154,7 @@ func PatchDocument(c *gin.Context) {
 	var modifiedDocument map[string]interface{}
 	err = json.Unmarshal(modifiedDocumentBytes, &modifiedDocument)
 	if err != nil {
-		logger.Error("Failed to unmarshal modified document:", err)
+		logger.ErrorLn("Failed to unmarshal modified document:", err)
 		c.JSON(http.StatusInternalServerError, gin.H{"message": "Failed to unmarshal modified document"})
 		return
 	}
@@ -160,30 +164,37 @@ func PatchDocument(c *gin.Context) {
 		return
 	}
 
-	status = repositories.DeleteDocument(databaseId, collectionId, documentId)
+	status = h.dataStore.DeleteDocument(databaseId, collectionId, documentId)
-	if status == repositorymodels.StatusNotFound {
+	if status == datastore.StatusNotFound {
-		c.IndentedJSON(http.StatusNotFound, gin.H{"message": "NotFound"})
+		c.IndentedJSON(http.StatusNotFound, constants.NotFoundResponse)
 		return
 	}
 
-	createdDocument, status := repositories.CreateDocument(databaseId, collectionId, modifiedDocument)
+	createdDocument, status := h.dataStore.CreateDocument(databaseId, collectionId, modifiedDocument)
-	if status == repositorymodels.Conflict {
+	if status == datastore.Conflict {
-		c.IndentedJSON(http.StatusConflict, gin.H{"message": "Conflict"})
+		c.IndentedJSON(http.StatusConflict, constants.ConflictResponse)
 		return
 	}
 
-	if status == repositorymodels.StatusOk {
+	if status == datastore.StatusOk {
 		c.IndentedJSON(http.StatusCreated, createdDocument)
 		return
 	}
 
-	c.IndentedJSON(http.StatusInternalServerError, gin.H{"message": "Unknown error"})
+	c.IndentedJSON(http.StatusInternalServerError, constants.UnknownErrorResponse)
 }
 
-func DocumentsPost(c *gin.Context) {
+func (h *Handlers) DocumentsPost(c *gin.Context) {
 	databaseId := c.Param("databaseId")
 	collectionId := c.Param("collId")
 
+	// Handle batch requests
+	isBatchRequest, _ := strconv.ParseBool(c.GetHeader("x-ms-cosmos-is-batch-request"))
+	if isBatchRequest {
+		h.handleBatchRequest(c)
+		return
+	}
+
 	var requestBody map[string]interface{}
 	if err := c.BindJSON(&requestBody); err != nil {
 		c.JSON(http.StatusBadRequest, gin.H{"message": err.Error()})
@@ -192,55 +203,32 @@ func DocumentsPost(c *gin.Context) {
 
 	query := requestBody["query"]
 	if query != nil {
-		if c.GetHeader("x-ms-cosmos-is-query-plan-request") != "" {
+		h.handleDocumentQuery(c, requestBody)
-			c.IndentedJSON(http.StatusOK, constants.QueryPlanResponse)
-			return
-		}
-
-		var queryParameters map[string]interface{}
-		if paramsArray, ok := requestBody["parameters"].([]interface{}); ok {
-			queryParameters = parametersToMap(paramsArray)
-		}
-
-		docs, status := repositories.ExecuteQueryDocuments(databaseId, collectionId, query.(string), queryParameters)
-		if status != repositorymodels.StatusOk {
-			// TODO: Currently we return everything if the query fails
-			GetAllDocuments(c)
-			return
-		}
-
-		collection, _ := repositories.GetCollection(databaseId, collectionId)
-		c.Header("x-ms-item-count", fmt.Sprintf("%d", len(docs)))
-		c.IndentedJSON(http.StatusOK, gin.H{
-			"_rid":      collection.ResourceID,
-			"Documents": docs,
-			"_count":    len(docs),
-		})
 		return
 	}
 
 	if requestBody["id"] == "" {
-		c.JSON(http.StatusBadRequest, gin.H{"message": "BadRequest"})
+		c.JSON(http.StatusBadRequest, constants.BadRequestResponse)
 		return
 	}
 
 	isUpsert, _ := strconv.ParseBool(c.GetHeader("x-ms-documentdb-is-upsert"))
 	if isUpsert {
-		repositories.DeleteDocument(databaseId, collectionId, requestBody["id"].(string))
+		h.dataStore.DeleteDocument(databaseId, collectionId, requestBody["id"].(string))
 	}
 
-	createdDocument, status := repositories.CreateDocument(databaseId, collectionId, requestBody)
+	createdDocument, status := h.dataStore.CreateDocument(databaseId, collectionId, requestBody)
-	if status == repositorymodels.Conflict {
+	if status == datastore.Conflict {
-		c.IndentedJSON(http.StatusConflict, gin.H{"message": "Conflict"})
+		c.IndentedJSON(http.StatusConflict, constants.ConflictResponse)
 		return
 	}
 
-	if status == repositorymodels.StatusOk {
+	if status == datastore.StatusOk {
 		c.IndentedJSON(http.StatusCreated, createdDocument)
 		return
 	}
 
-	c.IndentedJSON(http.StatusInternalServerError, gin.H{"message": "Unknown error"})
+	c.IndentedJSON(http.StatusInternalServerError, constants.UnknownErrorResponse)
 }
 
 func parametersToMap(pairs []interface{}) map[string]interface{} {
@@ -254,3 +242,155 @@ func parametersToMap(pairs []interface{}) map[string]interface{} {
 
 	return result
 }
+
+func (h *Handlers) handleDocumentQuery(c *gin.Context, requestBody map[string]interface{}) {
+	databaseId := c.Param("databaseId")
+	collectionId := c.Param("collId")
+
+	if c.GetHeader("x-ms-cosmos-is-query-plan-request") != "" {
+		c.IndentedJSON(http.StatusOK, constants.QueryPlanResponse)
+		return
+	}
+
+	var queryParameters map[string]interface{}
+	if paramsArray, ok := requestBody["parameters"].([]interface{}); ok {
+		queryParameters = parametersToMap(paramsArray)
+	}
+
+	queryText := requestBody["query"].(string)
+	docs, status := h.executeQueryDocuments(databaseId, collectionId, queryText, queryParameters)
+	if status != datastore.StatusOk {
+		// TODO: Currently we return everything if the query fails
+		h.GetAllDocuments(c)
+		return
+	}
+
+	collection, _ := h.dataStore.GetCollection(databaseId, collectionId)
+	c.Header("x-ms-item-count", fmt.Sprintf("%d", len(docs)))
+	c.IndentedJSON(http.StatusOK, gin.H{
+		"_rid":      collection.ResourceID,
+		"Documents": docs,
+		"_count":    len(docs),
+	})
+}
+
+func (h *Handlers) handleBatchRequest(c *gin.Context) {
+	databaseId := c.Param("databaseId")
+	collectionId := c.Param("collId")
+
+	batchOperations := make([]apimodels.BatchOperation, 0)
+	if err := c.BindJSON(&batchOperations); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"message": err.Error()})
+		return
+	}
+
+	batchOperationResults := make([]apimodels.BatchOperationResult, len(batchOperations))
+	for idx, operation := range batchOperations {
+		switch operation.OperationType {
+		case apimodels.BatchOperationTypeCreate:
+			createdDocument, status := h.dataStore.CreateDocument(databaseId, collectionId, operation.ResourceBody)
+			responseCode := dataStoreStatusToResponseCode(status)
+			if status == datastore.StatusOk {
+				responseCode = http.StatusCreated
+			}
+			batchOperationResults[idx] = apimodels.BatchOperationResult{
+				StatusCode:   responseCode,
+				ResourceBody: createdDocument,
+			}
+		case apimodels.BatchOperationTypeDelete:
+			status := h.dataStore.DeleteDocument(databaseId, collectionId, operation.Id)
+			responseCode := dataStoreStatusToResponseCode(status)
+			if status == datastore.StatusOk {
+				responseCode = http.StatusNoContent
+			}
+			batchOperationResults[idx] = apimodels.BatchOperationResult{
+				StatusCode: responseCode,
+			}
+		case apimodels.BatchOperationTypeReplace:
+			deleteStatus := h.dataStore.DeleteDocument(databaseId, collectionId, operation.Id)
+			if deleteStatus == datastore.StatusNotFound {
+				batchOperationResults[idx] = apimodels.BatchOperationResult{
+					StatusCode: http.StatusNotFound,
+				}
+				continue
+			}
+			createdDocument, createStatus := h.dataStore.CreateDocument(databaseId, collectionId, operation.ResourceBody)
+			responseCode := dataStoreStatusToResponseCode(createStatus)
+			if createStatus == datastore.StatusOk {
+				responseCode = http.StatusCreated
+			}
+			batchOperationResults[idx] = apimodels.BatchOperationResult{
+				StatusCode:   responseCode,
+				ResourceBody: createdDocument,
+			}
+		case apimodels.BatchOperationTypeUpsert:
+			documentId := operation.ResourceBody["id"].(string)
+			h.dataStore.DeleteDocument(databaseId, collectionId, documentId)
+			createdDocument, createStatus := h.dataStore.CreateDocument(databaseId, collectionId, operation.ResourceBody)
+			responseCode := dataStoreStatusToResponseCode(createStatus)
+			if createStatus == datastore.StatusOk {
+				responseCode = http.StatusCreated
+			}
+			batchOperationResults[idx] = apimodels.BatchOperationResult{
+				StatusCode:   responseCode,
+				ResourceBody: createdDocument,
+			}
+		case apimodels.BatchOperationTypeRead:
+			document, status := h.dataStore.GetDocument(databaseId, collectionId, operation.Id)
+			batchOperationResults[idx] = apimodels.BatchOperationResult{
+				StatusCode:   dataStoreStatusToResponseCode(status),
+				ResourceBody: document,
+			}
+		case apimodels.BatchOperationTypePatch:
+			batchOperationResults[idx] = apimodels.BatchOperationResult{
+				StatusCode: http.StatusNotImplemented,
+				Message:    "Patch operation is not implemented",
+			}
+		default:
+			batchOperationResults[idx] = apimodels.BatchOperationResult{
+				StatusCode: http.StatusBadRequest,
+				Message:    "Unknown operation type",
+			}
+		}
+	}
+
+	c.JSON(http.StatusOK, batchOperationResults)
+}
+
+func dataStoreStatusToResponseCode(status datastore.DataStoreStatus) int {
+	switch status {
+	case datastore.StatusOk:
+		return http.StatusOK
+	case datastore.StatusNotFound:
+		return http.StatusNotFound
+	case datastore.Conflict:
+		return http.StatusConflict
+	case datastore.BadRequest:
+		return http.StatusBadRequest
+	default:
+		return http.StatusInternalServerError
+	}
+}
+
+func (h *Handlers) executeQueryDocuments(databaseId string, collectionId string, query string, queryParameters map[string]interface{}) ([]memoryexecutor.RowType, datastore.DataStoreStatus) {
+	parsedQuery, err := nosql.Parse("", []byte(query))
+	if err != nil {
+		logger.Errorf("Failed to parse query: %s\nerr: %v", query, err)
+		return nil, datastore.BadRequest
+	}
+
+	allDocumentsIterator, status := h.dataStore.GetDocumentIterator(databaseId, collectionId)
+	if status != datastore.StatusOk {
+		return nil, status
+	}
+	defer allDocumentsIterator.Close()
+
+	rowsIterator := converters.NewDocumentToRowTypeIterator(allDocumentsIterator)
+
+	if typedQuery, ok := parsedQuery.(parsers.SelectStmt); ok {
+		typedQuery.Parameters = queryParameters
+		return memoryexecutor.ExecuteQuery(typedQuery, rowsIterator), datastore.StatusOk
+	}
+
+	return nil, datastore.BadRequest
+}

api/handlers/explorer.go

@@ -4,15 +4,14 @@ import (
 	"fmt"
 
 	"github.com/gin-gonic/gin"
-	"github.com/pikami/cosmium/api/config"
 )
 
-func RegisterExplorerHandlers(router *gin.Engine) {
+func (h *Handlers) RegisterExplorerHandlers(router *gin.Engine) {
-	explorer := router.Group(config.Config.ExplorerBaseUrlLocation)
+	explorer := router.Group(h.config.ExplorerBaseUrlLocation)
 	{
 		explorer.Use(func(ctx *gin.Context) {
 			if ctx.Param("filepath") == "/config.json" {
-				endpoint := fmt.Sprintf("https://%s:%d", config.Config.Host, config.Config.Port)
+				endpoint := fmt.Sprintf("https://%s:%d", h.config.Host, h.config.Port)
 				ctx.JSON(200, gin.H{
 					"BACKEND_ENDPOINT":       endpoint,
 					"MONGO_BACKEND_ENDPOINT": endpoint,
@@ -25,8 +24,8 @@ func RegisterExplorerHandlers(router *gin.Engine) {
 			}
 		})
 
-		if config.Config.ExplorerPath != "" {
+		if h.config.ExplorerPath != "" {
-			explorer.Static("/", config.Config.ExplorerPath)
+			explorer.Static("/", h.config.ExplorerPath)
 		}
 	}
 }

api/handlers/handlers.go

@@ -0,0 +1,18 @@
+package handlers
+
+import (
+	"github.com/pikami/cosmium/api/config"
+	"github.com/pikami/cosmium/internal/datastore"
+)
+
+type Handlers struct {
+	dataStore datastore.DataStore
+	config    *config.ServerConfig
+}
+
+func NewHandlers(dataStore datastore.DataStore, config *config.ServerConfig) *Handlers {
+	return &Handlers{
+		dataStore: dataStore,
+		config:    config,
+	}
+}

api/handlers/middleware/authentication.go

@@ -10,11 +10,11 @@ import (
 	"github.com/pikami/cosmium/internal/logger"
 )
 
-func Authentication() gin.HandlerFunc {
+func Authentication(config *config.ServerConfig) gin.HandlerFunc {
 	return func(c *gin.Context) {
 		requestUrl := c.Request.URL.String()
-		if config.Config.DisableAuth ||
+		if config.DisableAuth ||
-			strings.HasPrefix(requestUrl, config.Config.ExplorerBaseUrlLocation) ||
+			strings.HasPrefix(requestUrl, config.ExplorerBaseUrlLocation) ||
 			strings.HasPrefix(requestUrl, "/cosmium") {
 			return
 		}
@@ -25,7 +25,7 @@ func Authentication() gin.HandlerFunc {
 		authHeader := c.Request.Header.Get("authorization")
 		date := c.Request.Header.Get("x-ms-date")
 		expectedSignature := authentication.GenerateSignature(
-			c.Request.Method, resourceType, resourceId, date, config.Config.AccountKey)
+			c.Request.Method, resourceType, resourceId, date, config.AccountKey)
 
 		decoded, _ := url.QueryUnescape(authHeader)
 		params, _ := url.ParseQuery(decoded)

api/handlers/middleware/loggers.go

@@ -16,7 +16,7 @@ func RequestLogger() gin.HandlerFunc {
 
 		bodyStr := readBody(rdr1)
 		if bodyStr != "" {
-			logger.Debug(bodyStr)
+			logger.DebugLn(bodyStr)
 		}
 
 		c.Request.Body = rdr2

api/handlers/middleware/strip_trailing_slashes.go

@@ -7,10 +7,10 @@ import (
 	"github.com/pikami/cosmium/api/config"
 )
 
-func StripTrailingSlashes(r *gin.Engine) gin.HandlerFunc {
+func StripTrailingSlashes(r *gin.Engine, config *config.ServerConfig) gin.HandlerFunc {
 	return func(c *gin.Context) {
 		path := c.Request.URL.Path
-		if len(path) > 1 && path[len(path)-1] == '/' && !strings.Contains(path, config.Config.ExplorerBaseUrlLocation) {
+		if len(path) > 1 && path[len(path)-1] == '/' && !strings.Contains(path, config.ExplorerBaseUrlLocation) {
 			c.Request.URL.Path = path[:len(path)-1]
 			r.HandleContext(c)
 			c.Abort()

api/handlers/partition_key_ranges.go

@@ -5,11 +5,12 @@ import (
 	"net/http"
 
 	"github.com/gin-gonic/gin"
-	"github.com/pikami/cosmium/internal/repositories"
+	"github.com/pikami/cosmium/internal/constants"
-	repositorymodels "github.com/pikami/cosmium/internal/repository_models"
+	"github.com/pikami/cosmium/internal/datastore"
+	"github.com/pikami/cosmium/internal/resourceid"
 )
 
-func GetPartitionKeyRanges(c *gin.Context) {
+func (h *Handlers) GetPartitionKeyRanges(c *gin.Context) {
 	databaseId := c.Param("databaseId")
 	collectionId := c.Param("collId")
 
@@ -18,8 +19,8 @@ func GetPartitionKeyRanges(c *gin.Context) {
 		return
 	}
 
-	partitionKeyRanges, status := repositories.GetPartitionKeyRanges(databaseId, collectionId)
+	partitionKeyRanges, status := h.dataStore.GetPartitionKeyRanges(databaseId, collectionId)
-	if status == repositorymodels.StatusOk {
+	if status == datastore.StatusOk {
 		c.Header("etag", "\"420\"")
 		c.Header("lsn", "420")
 		c.Header("x-ms-cosmos-llsn", "420")
@@ -27,23 +28,24 @@ func GetPartitionKeyRanges(c *gin.Context) {
 		c.Header("x-ms-item-count", fmt.Sprintf("%d", len(partitionKeyRanges)))
 
 		collectionRid := collectionId
-		collection, _ := repositories.GetCollection(databaseId, collectionId)
+		collection, _ := h.dataStore.GetCollection(databaseId, collectionId)
 		if collection.ResourceID != "" {
 			collectionRid = collection.ResourceID
 		}
 
+		rid := resourceid.NewCombined(collectionRid, resourceid.New(resourceid.ResourceTypePartitionKeyRange))
 		c.IndentedJSON(http.StatusOK, gin.H{
-			"_rid":               collectionRid,
+			"_rid":               rid,
 			"_count":             len(partitionKeyRanges),
 			"PartitionKeyRanges": partitionKeyRanges,
 		})
 		return
 	}
 
-	if status == repositorymodels.StatusNotFound {
+	if status == datastore.StatusNotFound {
-		c.IndentedJSON(http.StatusNotFound, gin.H{"message": "NotFound"})
+		c.IndentedJSON(http.StatusNotFound, constants.NotFoundResponse)
 		return
 	}
 
-	c.IndentedJSON(http.StatusInternalServerError, gin.H{"message": "Unknown error"})
+	c.IndentedJSON(http.StatusInternalServerError, constants.UnknownErrorResponse)
 }

api/handlers/server_info.go

@@ -5,30 +5,31 @@ import (
 	"net/http"
 
 	"github.com/gin-gonic/gin"
-	"github.com/pikami/cosmium/api/config"
 )
 
-func GetServerInfo(c *gin.Context) {
+func (h *Handlers) GetServerInfo(c *gin.Context) {
 	c.IndentedJSON(http.StatusOK, gin.H{
 		"_self":     "",
-		"id":        config.Config.DatabaseAccount,
+		"id":        h.config.DatabaseAccount,
-		"_rid":      fmt.Sprintf("%s.%s", config.Config.DatabaseAccount, config.Config.DatabaseDomain),
+		"_rid":      fmt.Sprintf("%s.%s", h.config.DatabaseAccount, h.config.DatabaseDomain),
 		"media":     "//media/",
 		"addresses": "//addresses/",
 		"_dbs":      "//dbs/",
 		"writableLocations": []map[string]interface{}{
 			{
 				"name":                    "South Central US",
-				"databaseAccountEndpoint": config.Config.DatabaseEndpoint,
+				"databaseAccountEndpoint": h.config.DatabaseEndpoint,
 			},
 		},
 		"readableLocations": []map[string]interface{}{
 			{
 				"name":                    "South Central US",
-				"databaseAccountEndpoint": config.Config.DatabaseEndpoint,
+				"databaseAccountEndpoint": h.config.DatabaseEndpoint,
 			},
 		},
 		"enableMultipleWriteLocations":   false,
+		"continuousBackupEnabled":        false,
+		"enableNRegionSynchronousCommit": false,
 		"userReplicationPolicy": map[string]interface{}{
 			"asyncReplication":  false,
 			"minReplicaSetSize": 1,

api/handlers/stored_procedures.go

@@ -5,21 +5,115 @@ import (
 	"net/http"
 
 	"github.com/gin-gonic/gin"
-	"github.com/pikami/cosmium/internal/repositories"
+	"github.com/pikami/cosmium/internal/constants"
-	repositorymodels "github.com/pikami/cosmium/internal/repository_models"
+	"github.com/pikami/cosmium/internal/datastore"
 )
 
-func GetAllStoredProcedures(c *gin.Context) {
+func (h *Handlers) GetAllStoredProcedures(c *gin.Context) {
 	databaseId := c.Param("databaseId")
 	collectionId := c.Param("collId")
 
-	sps, status := repositories.GetAllStoredProcedures(databaseId, collectionId)
+	sps, status := h.dataStore.GetAllStoredProcedures(databaseId, collectionId)
 
-	if status == repositorymodels.StatusOk {
+	if status == datastore.StatusOk {
 		c.Header("x-ms-item-count", fmt.Sprintf("%d", len(sps)))
 		c.IndentedJSON(http.StatusOK, gin.H{"_rid": "", "StoredProcedures": sps, "_count": len(sps)})
 		return
 	}
 
-	c.IndentedJSON(http.StatusInternalServerError, gin.H{"message": "Unknown error"})
+	c.IndentedJSON(http.StatusInternalServerError, constants.UnknownErrorResponse)
+}
+
+func (h *Handlers) GetStoredProcedure(c *gin.Context) {
+	databaseId := c.Param("databaseId")
+	collectionId := c.Param("collId")
+	spId := c.Param("spId")
+
+	sp, status := h.dataStore.GetStoredProcedure(databaseId, collectionId, spId)
+
+	if status == datastore.StatusOk {
+		c.IndentedJSON(http.StatusOK, sp)
+		return
+	}
+
+	if status == datastore.StatusNotFound {
+		c.IndentedJSON(http.StatusNotFound, constants.NotFoundResponse)
+		return
+	}
+
+	c.IndentedJSON(http.StatusInternalServerError, constants.UnknownErrorResponse)
+}
+
+func (h *Handlers) DeleteStoredProcedure(c *gin.Context) {
+	databaseId := c.Param("databaseId")
+	collectionId := c.Param("collId")
+	spId := c.Param("spId")
+
+	status := h.dataStore.DeleteStoredProcedure(databaseId, collectionId, spId)
+	if status == datastore.StatusOk {
+		c.Status(http.StatusNoContent)
+		return
+	}
+
+	if status == datastore.StatusNotFound {
+		c.IndentedJSON(http.StatusNotFound, constants.NotFoundResponse)
+		return
+	}
+
+	c.IndentedJSON(http.StatusInternalServerError, constants.UnknownErrorResponse)
+}
+
+func (h *Handlers) ReplaceStoredProcedure(c *gin.Context) {
+	databaseId := c.Param("databaseId")
+	collectionId := c.Param("collId")
+	spId := c.Param("spId")
+
+	var sp datastore.StoredProcedure
+	if err := c.BindJSON(&sp); err != nil {
+		c.IndentedJSON(http.StatusBadRequest, constants.BadRequestResponse)
+		return
+	}
+
+	status := h.dataStore.DeleteStoredProcedure(databaseId, collectionId, spId)
+	if status == datastore.StatusNotFound {
+		c.IndentedJSON(http.StatusNotFound, constants.NotFoundResponse)
+		return
+	}
+
+	createdSP, status := h.dataStore.CreateStoredProcedure(databaseId, collectionId, sp)
+	if status == datastore.Conflict {
+		c.IndentedJSON(http.StatusConflict, constants.ConflictResponse)
+		return
+	}
+
+	if status == datastore.StatusOk {
+		c.IndentedJSON(http.StatusOK, createdSP)
+		return
+	}
+
+	c.IndentedJSON(http.StatusInternalServerError, constants.UnknownErrorResponse)
+}
+
+func (h *Handlers) CreateStoredProcedure(c *gin.Context) {
+	databaseId := c.Param("databaseId")
+	collectionId := c.Param("collId")
+
+	var sp datastore.StoredProcedure
+	if err := c.BindJSON(&sp); err != nil {
+		c.IndentedJSON(http.StatusBadRequest, constants.BadRequestResponse)
+		return
+	}
+
+	createdSP, status := h.dataStore.CreateStoredProcedure(databaseId, collectionId, sp)
+	if status == datastore.Conflict {
+		c.IndentedJSON(http.StatusConflict, constants.ConflictResponse)
+		return
+	}
+
+	if status == datastore.StatusOk {
+		c.IndentedJSON(http.StatusCreated, createdSP)
+		return
+	}
+
+	c.IndentedJSON(http.StatusInternalServerError, constants.UnknownErrorResponse)
 }

api/handlers/triggers.go

@@ -5,21 +5,115 @@ import (
 	"net/http"
 
 	"github.com/gin-gonic/gin"
-	"github.com/pikami/cosmium/internal/repositories"
+	"github.com/pikami/cosmium/internal/constants"
-	repositorymodels "github.com/pikami/cosmium/internal/repository_models"
+	"github.com/pikami/cosmium/internal/datastore"
 )
 
-func GetAllTriggers(c *gin.Context) {
+func (h *Handlers) GetAllTriggers(c *gin.Context) {
 	databaseId := c.Param("databaseId")
 	collectionId := c.Param("collId")
 
-	triggers, status := repositories.GetAllTriggers(databaseId, collectionId)
+	triggers, status := h.dataStore.GetAllTriggers(databaseId, collectionId)
 
-	if status == repositorymodels.StatusOk {
+	if status == datastore.StatusOk {
 		c.Header("x-ms-item-count", fmt.Sprintf("%d", len(triggers)))
 		c.IndentedJSON(http.StatusOK, gin.H{"_rid": "", "Triggers": triggers, "_count": len(triggers)})
 		return
 	}
 
-	c.IndentedJSON(http.StatusInternalServerError, gin.H{"message": "Unknown error"})
+	c.IndentedJSON(http.StatusInternalServerError, constants.UnknownErrorResponse)
+}
+
+func (h *Handlers) GetTrigger(c *gin.Context) {
+	databaseId := c.Param("databaseId")
+	collectionId := c.Param("collId")
+	triggerId := c.Param("triggerId")
+
+	trigger, status := h.dataStore.GetTrigger(databaseId, collectionId, triggerId)
+
+	if status == datastore.StatusOk {
+		c.IndentedJSON(http.StatusOK, trigger)
+		return
+	}
+
+	if status == datastore.StatusNotFound {
+		c.IndentedJSON(http.StatusNotFound, constants.NotFoundResponse)
+		return
+	}
+
+	c.IndentedJSON(http.StatusInternalServerError, constants.UnknownErrorResponse)
+}
+
+func (h *Handlers) DeleteTrigger(c *gin.Context) {
+	databaseId := c.Param("databaseId")
+	collectionId := c.Param("collId")
+	triggerId := c.Param("triggerId")
+
+	status := h.dataStore.DeleteTrigger(databaseId, collectionId, triggerId)
+	if status == datastore.StatusOk {
+		c.Status(http.StatusNoContent)
+		return
+	}
+
+	if status == datastore.StatusNotFound {
+		c.IndentedJSON(http.StatusNotFound, constants.NotFoundResponse)
+		return
+	}
+
+	c.IndentedJSON(http.StatusInternalServerError, constants.UnknownErrorResponse)
+}
+
+func (h *Handlers) ReplaceTrigger(c *gin.Context) {
+	databaseId := c.Param("databaseId")
+	collectionId := c.Param("collId")
+	triggerId := c.Param("triggerId")
+
+	var trigger datastore.Trigger
+	if err := c.BindJSON(&trigger); err != nil {
+		c.IndentedJSON(http.StatusBadRequest, constants.BadRequestResponse)
+		return
+	}
+
+	status := h.dataStore.DeleteTrigger(databaseId, collectionId, triggerId)
+	if status == datastore.StatusNotFound {
+		c.IndentedJSON(http.StatusNotFound, constants.NotFoundResponse)
+		return
+	}
+
+	createdTrigger, status := h.dataStore.CreateTrigger(databaseId, collectionId, trigger)
+	if status == datastore.Conflict {
+		c.IndentedJSON(http.StatusConflict, constants.ConflictResponse)
+		return
+	}
+
+	if status == datastore.StatusOk {
+		c.IndentedJSON(http.StatusOK, createdTrigger)
+		return
+	}
+
+	c.IndentedJSON(http.StatusInternalServerError, constants.UnknownErrorResponse)
+}
+
+func (h *Handlers) CreateTrigger(c *gin.Context) {
+	databaseId := c.Param("databaseId")
+	collectionId := c.Param("collId")
+
+	var trigger datastore.Trigger
+	if err := c.BindJSON(&trigger); err != nil {
+		c.IndentedJSON(http.StatusBadRequest, constants.BadRequestResponse)
+		return
+	}
+
+	createdTrigger, status := h.dataStore.CreateTrigger(databaseId, collectionId, trigger)
+	if status == datastore.Conflict {
+		c.IndentedJSON(http.StatusConflict, constants.ConflictResponse)
+		return
+	}
+
+	if status == datastore.StatusOk {
+		c.IndentedJSON(http.StatusCreated, createdTrigger)
+		return
+	}
+
+	c.IndentedJSON(http.StatusInternalServerError, constants.UnknownErrorResponse)
 }

api/handlers/user_defined_functions.go

@@ -5,21 +5,115 @@ import (
 	"net/http"
 
 	"github.com/gin-gonic/gin"
-	"github.com/pikami/cosmium/internal/repositories"
+	"github.com/pikami/cosmium/internal/constants"
-	repositorymodels "github.com/pikami/cosmium/internal/repository_models"
+	"github.com/pikami/cosmium/internal/datastore"
 )
 
-func GetAllUserDefinedFunctions(c *gin.Context) {
+func (h *Handlers) GetAllUserDefinedFunctions(c *gin.Context) {
 	databaseId := c.Param("databaseId")
 	collectionId := c.Param("collId")
 
-	udfs, status := repositories.GetAllUserDefinedFunctions(databaseId, collectionId)
+	udfs, status := h.dataStore.GetAllUserDefinedFunctions(databaseId, collectionId)
 
-	if status == repositorymodels.StatusOk {
+	if status == datastore.StatusOk {
 		c.Header("x-ms-item-count", fmt.Sprintf("%d", len(udfs)))
 		c.IndentedJSON(http.StatusOK, gin.H{"_rid": "", "UserDefinedFunctions": udfs, "_count": len(udfs)})
 		return
 	}
 
-	c.IndentedJSON(http.StatusInternalServerError, gin.H{"message": "Unknown error"})
+	c.IndentedJSON(http.StatusInternalServerError, constants.UnknownErrorResponse)
+}
+
+func (h *Handlers) GetUserDefinedFunction(c *gin.Context) {
+	databaseId := c.Param("databaseId")
+	collectionId := c.Param("collId")
+	udfId := c.Param("udfId")
+
+	udf, status := h.dataStore.GetUserDefinedFunction(databaseId, collectionId, udfId)
+
+	if status == datastore.StatusOk {
+		c.IndentedJSON(http.StatusOK, udf)
+		return
+	}
+
+	if status == datastore.StatusNotFound {
+		c.IndentedJSON(http.StatusNotFound, constants.NotFoundResponse)
+		return
+	}
+
+	c.IndentedJSON(http.StatusInternalServerError, constants.UnknownErrorResponse)
+}
+
+func (h *Handlers) DeleteUserDefinedFunction(c *gin.Context) {
+	databaseId := c.Param("databaseId")
+	collectionId := c.Param("collId")
+	udfId := c.Param("udfId")
+
+	status := h.dataStore.DeleteUserDefinedFunction(databaseId, collectionId, udfId)
+	if status == datastore.StatusOk {
+		c.Status(http.StatusNoContent)
+		return
+	}
+
+	if status == datastore.StatusNotFound {
+		c.IndentedJSON(http.StatusNotFound, constants.NotFoundResponse)
+		return
+	}
+
+	c.IndentedJSON(http.StatusInternalServerError, constants.UnknownErrorResponse)
+}
+
+func (h *Handlers) ReplaceUserDefinedFunction(c *gin.Context) {
+	databaseId := c.Param("databaseId")
+	collectionId := c.Param("collId")
+	udfId := c.Param("udfId")
+
+	var udf datastore.UserDefinedFunction
+	if err := c.BindJSON(&udf); err != nil {
+		c.IndentedJSON(http.StatusBadRequest, constants.BadRequestResponse)
+		return
+	}
+
+	status := h.dataStore.DeleteUserDefinedFunction(databaseId, collectionId, udfId)
+	if status == datastore.StatusNotFound {
+		c.IndentedJSON(http.StatusNotFound, constants.NotFoundResponse)
+		return
+	}
+
+	createdUdf, status := h.dataStore.CreateUserDefinedFunction(databaseId, collectionId, udf)
+	if status == datastore.Conflict {
+		c.IndentedJSON(http.StatusConflict, constants.ConflictResponse)
+		return
+	}
+
+	if status == datastore.StatusOk {
+		c.IndentedJSON(http.StatusOK, createdUdf)
+		return
+	}
+
+	c.IndentedJSON(http.StatusInternalServerError, constants.UnknownErrorResponse)
+}
+
+func (h *Handlers) CreateUserDefinedFunction(c *gin.Context) {
+	databaseId := c.Param("databaseId")
+	collectionId := c.Param("collId")
+
+	var udf datastore.UserDefinedFunction
+	if err := c.BindJSON(&udf); err != nil {
+		c.IndentedJSON(http.StatusBadRequest, constants.BadRequestResponse)
+		return
+	}
+
+	createdUdf, status := h.dataStore.CreateUserDefinedFunction(databaseId, collectionId, udf)
+	if status == datastore.Conflict {
+		c.IndentedJSON(http.StatusConflict, constants.ConflictResponse)
+		return
+	}
+
+	if status == datastore.StatusOk {
+		c.IndentedJSON(http.StatusCreated, createdUdf)
+		return
+	}
+
+	c.IndentedJSON(http.StatusInternalServerError, constants.UnknownErrorResponse)
 }

api/router.go

@@ -1,98 +1,144 @@
 package api
 
 import (
+	"context"
 	"fmt"
 	"net/http"
+	"sync"
+	"time"
 
 	"github.com/gin-gonic/gin"
-	"github.com/pikami/cosmium/api/config"
 	"github.com/pikami/cosmium/api/handlers"
 	"github.com/pikami/cosmium/api/handlers/middleware"
+	"github.com/pikami/cosmium/internal/datastore"
 	"github.com/pikami/cosmium/internal/logger"
 	tlsprovider "github.com/pikami/cosmium/internal/tls_provider"
 )
 
-func CreateRouter() *gin.Engine {
+var ginMux sync.Mutex
+
+func (s *ApiServer) CreateRouter(dataStore datastore.DataStore) {
+	routeHandlers := handlers.NewHandlers(dataStore, s.config)
+
+	ginMux.Lock()
+	gin.DefaultWriter = logger.InfoWriter()
+	gin.DefaultErrorWriter = logger.ErrorWriter()
+
+	if s.config.LogLevel != "debug" {
+		gin.SetMode(gin.ReleaseMode)
+	}
+	ginMux.Unlock()
+
 	router := gin.Default(func(e *gin.Engine) {
 		e.RedirectTrailingSlash = false
 	})
 
-	if config.Config.Debug {
+	if s.config.LogLevel == "debug" {
 		router.Use(middleware.RequestLogger())
 	}
 
-	router.Use(middleware.StripTrailingSlashes(router))
+	router.Use(middleware.StripTrailingSlashes(router, s.config))
-	router.Use(middleware.Authentication())
+	router.Use(middleware.Authentication(s.config))
 
-	router.GET("/dbs/:databaseId/colls/:collId/pkranges", handlers.GetPartitionKeyRanges)
+	router.GET("/dbs/:databaseId/colls/:collId/pkranges", routeHandlers.GetPartitionKeyRanges)
 
-	router.POST("/dbs/:databaseId/colls/:collId/docs", handlers.DocumentsPost)
+	router.POST("/dbs/:databaseId/colls/:collId/docs", routeHandlers.DocumentsPost)
-	router.GET("/dbs/:databaseId/colls/:collId/docs", handlers.GetAllDocuments)
+	router.GET("/dbs/:databaseId/colls/:collId/docs", routeHandlers.GetAllDocuments)
-	router.GET("/dbs/:databaseId/colls/:collId/docs/:docId", handlers.GetDocument)
+	router.GET("/dbs/:databaseId/colls/:collId/docs/:docId", routeHandlers.GetDocument)
-	router.PUT("/dbs/:databaseId/colls/:collId/docs/:docId", handlers.ReplaceDocument)
+	router.PUT("/dbs/:databaseId/colls/:collId/docs/:docId", routeHandlers.ReplaceDocument)
-	router.PATCH("/dbs/:databaseId/colls/:collId/docs/:docId", handlers.PatchDocument)
+	router.PATCH("/dbs/:databaseId/colls/:collId/docs/:docId", routeHandlers.PatchDocument)
-	router.DELETE("/dbs/:databaseId/colls/:collId/docs/:docId", handlers.DeleteDocument)
+	router.DELETE("/dbs/:databaseId/colls/:collId/docs/:docId", routeHandlers.DeleteDocument)
 
-	router.POST("/dbs/:databaseId/colls", handlers.CreateCollection)
+	router.POST("/dbs/:databaseId/colls", routeHandlers.CreateCollection)
-	router.GET("/dbs/:databaseId/colls", handlers.GetAllCollections)
+	router.GET("/dbs/:databaseId/colls", routeHandlers.GetAllCollections)
-	router.GET("/dbs/:databaseId/colls/:collId", handlers.GetCollection)
+	router.GET("/dbs/:databaseId/colls/:collId", routeHandlers.GetCollection)
-	router.DELETE("/dbs/:databaseId/colls/:collId", handlers.DeleteCollection)
+	router.DELETE("/dbs/:databaseId/colls/:collId", routeHandlers.DeleteCollection)
 
-	router.POST("/dbs", handlers.CreateDatabase)
+	router.POST("/dbs", routeHandlers.CreateDatabase)
-	router.GET("/dbs", handlers.GetAllDatabases)
+	router.GET("/dbs", routeHandlers.GetAllDatabases)
-	router.GET("/dbs/:databaseId", handlers.GetDatabase)
+	router.GET("/dbs/:databaseId", routeHandlers.GetDatabase)
-	router.DELETE("/dbs/:databaseId", handlers.DeleteDatabase)
+	router.DELETE("/dbs/:databaseId", routeHandlers.DeleteDatabase)
 
-	router.GET("/dbs/:databaseId/colls/:collId/udfs", handlers.GetAllUserDefinedFunctions)
+	router.POST("/dbs/:databaseId/colls/:collId/triggers", routeHandlers.CreateTrigger)
-	router.GET("/dbs/:databaseId/colls/:collId/sprocs", handlers.GetAllStoredProcedures)
+	router.GET("/dbs/:databaseId/colls/:collId/triggers", routeHandlers.GetAllTriggers)
-	router.GET("/dbs/:databaseId/colls/:collId/triggers", handlers.GetAllTriggers)
+	router.GET("/dbs/:databaseId/colls/:collId/triggers/:triggerId", routeHandlers.GetTrigger)
+	router.PUT("/dbs/:databaseId/colls/:collId/triggers/:triggerId", routeHandlers.ReplaceTrigger)
+	router.DELETE("/dbs/:databaseId/colls/:collId/triggers/:triggerId", routeHandlers.DeleteTrigger)
+
+	router.POST("/dbs/:databaseId/colls/:collId/sprocs", routeHandlers.CreateStoredProcedure)
+	router.GET("/dbs/:databaseId/colls/:collId/sprocs", routeHandlers.GetAllStoredProcedures)
+	router.GET("/dbs/:databaseId/colls/:collId/sprocs/:sprocId", routeHandlers.GetStoredProcedure)
+	router.PUT("/dbs/:databaseId/colls/:collId/sprocs/:sprocId", routeHandlers.ReplaceStoredProcedure)
+	router.DELETE("/dbs/:databaseId/colls/:collId/sprocs/:sprocId", routeHandlers.DeleteStoredProcedure)
+
+	router.POST("/dbs/:databaseId/colls/:collId/udfs", routeHandlers.CreateUserDefinedFunction)
+	router.GET("/dbs/:databaseId/colls/:collId/udfs", routeHandlers.GetAllUserDefinedFunctions)
+	router.GET("/dbs/:databaseId/colls/:collId/udfs/:udfId", routeHandlers.GetUserDefinedFunction)
+	router.PUT("/dbs/:databaseId/colls/:collId/udfs/:udfId", routeHandlers.ReplaceUserDefinedFunction)
+	router.DELETE("/dbs/:databaseId/colls/:collId/udfs/:udfId", routeHandlers.DeleteUserDefinedFunction)
 
 	router.GET("/offers", handlers.GetOffers)
-	router.GET("/", handlers.GetServerInfo)
+	router.GET("/", routeHandlers.GetServerInfo)
 
-	router.GET("/cosmium/export", handlers.CosmiumExport)
+	router.GET("/cosmium/export", routeHandlers.CosmiumExport)
 
-	handlers.RegisterExplorerHandlers(router)
+	routeHandlers.RegisterExplorerHandlers(router)
 
-	return router
+	s.router = router
 }
 
-func StartAPI() {
+func (s *ApiServer) Start() error {
-	if !config.Config.Debug {
+	listenAddress := fmt.Sprintf(":%d", s.config.Port)
-		gin.SetMode(gin.ReleaseMode)
+	s.isActive = true
-	}
 
-	router := CreateRouter()
-	listenAddress := fmt.Sprintf(":%d", config.Config.Port)
-
-	if config.Config.TLS_CertificatePath != "" && config.Config.TLS_CertificateKey != "" {
-		err := router.RunTLS(
-			listenAddress,
-			config.Config.TLS_CertificatePath,
-			config.Config.TLS_CertificateKey)
-		if err != nil {
-			logger.Error("Failed to start HTTPS server:", err)
-		}
-
-		return
-	}
-
-	if config.Config.DisableTls {
-		router.Run(listenAddress)
-	}
-
-	tlsConfig := tlsprovider.GetDefaultTlsConfig()
 	server := &http.Server{
 		Addr:    listenAddress,
-		Handler:   router.Handler(),
+		Handler: s.router.Handler(),
-		TLSConfig: tlsConfig,
 	}
 
+	errChan := make(chan error, 1)
+
+	go func() {
+		<-s.stopServer
+		logger.InfoLn("Shutting down server...")
+		err := server.Shutdown(context.TODO())
+		if err != nil {
+			logger.ErrorLn("Failed to shutdown server:", err)
+		}
+		s.onServerShutdown <- true
+	}()
+
+	go func() {
+		var err error
+		if s.config.DisableTls {
+			logger.Infof("Listening and serving HTTP on %s\n", server.Addr)
+			err = server.ListenAndServe()
+		} else if s.config.TLS_CertificatePath != "" && s.config.TLS_CertificateKey != "" {
+			logger.Infof("Listening and serving HTTPS on %s\n", server.Addr)
+			err = server.ListenAndServeTLS(
+				s.config.TLS_CertificatePath,
+				s.config.TLS_CertificateKey)
+		} else {
+			tlsConfig := tlsprovider.GetDefaultTlsConfig()
+			server.TLSConfig = tlsConfig
+
 			logger.Infof("Listening and serving HTTPS on %s\n", server.Addr)
-	err := server.ListenAndServeTLS("", "")
+			err = server.ListenAndServeTLS("", "")
-	if err != nil {
-		logger.Error("Failed to start HTTPS server:", err)
 		}
 
-	router.Run()
+		if err != nil && err != http.ErrServerClosed {
+			logger.ErrorLn("Failed to start server:", err)
+			errChan <- err
+		} else {
+			errChan <- nil
+		}
+		s.isActive = false
+	}()
+
+	select {
+	case err := <-errChan:
+		return err
+	case <-time.After(50 * time.Millisecond):
+		return nil
+	}
 }

api/tests/authentication_test.go

@@ -2,27 +2,24 @@ package tests_test
 
 import (
 	"context"
-	"errors"
 	"fmt"
 	"io"
 	"net/http"
 	"testing"
 
-	"github.com/Azure/azure-sdk-for-go/sdk/azcore"
 	"github.com/Azure/azure-sdk-for-go/sdk/data/azcosmos"
 	"github.com/pikami/cosmium/api/config"
-	"github.com/pikami/cosmium/internal/repositories"
 	"github.com/stretchr/testify/assert"
 )
 
 func Test_Authentication(t *testing.T) {
 	ts := runTestServer()
-	defer ts.Close()
+	defer ts.Server.Close()
 
 	t.Run("Should get 200 when correct account key is used", func(t *testing.T) {
-		repositories.DeleteDatabase(testDatabaseName)
+		ts.DataStore.DeleteDatabase(testDatabaseName)
 		client, err := azcosmos.NewClientFromConnectionString(
-			fmt.Sprintf("AccountEndpoint=%s;AccountKey=%s", ts.URL, config.DefaultAccountKey),
+			formatConnectionString(ts.URL, config.DefaultAccountKey),
 			&azcosmos.ClientOptions{},
 		)
 		assert.Nil(t, err)
@@ -35,28 +32,10 @@ func Test_Authentication(t *testing.T) {
 		assert.Equal(t, createResponse.DatabaseProperties.ID, testDatabaseName)
 	})
 
-	t.Run("Should get 200 when wrong account key is used, but authentication is dissabled", func(t *testing.T) {
-		config.Config.DisableAuth = true
-		repositories.DeleteDatabase(testDatabaseName)
-		client, err := azcosmos.NewClientFromConnectionString(
-			fmt.Sprintf("AccountEndpoint=%s;AccountKey=%s", ts.URL, "AAAA"),
-			&azcosmos.ClientOptions{},
-		)
-		assert.Nil(t, err)
-
-		createResponse, err := client.CreateDatabase(
-			context.TODO(),
-			azcosmos.DatabaseProperties{ID: testDatabaseName},
-			&azcosmos.CreateDatabaseOptions{})
-		assert.Nil(t, err)
-		assert.Equal(t, createResponse.DatabaseProperties.ID, testDatabaseName)
-		config.Config.DisableAuth = false
-	})
-
 	t.Run("Should get 401 when wrong account key is used", func(t *testing.T) {
-		repositories.DeleteDatabase(testDatabaseName)
+		ts.DataStore.DeleteDatabase(testDatabaseName)
 		client, err := azcosmos.NewClientFromConnectionString(
-			fmt.Sprintf("AccountEndpoint=%s;AccountKey=%s", ts.URL, "AAAA"),
+			formatConnectionString(ts.URL, "AAAA"),
 			&azcosmos.ClientOptions{},
 		)
 		assert.Nil(t, err)
@@ -66,12 +45,7 @@ func Test_Authentication(t *testing.T) {
 			azcosmos.DatabaseProperties{ID: testDatabaseName},
 			&azcosmos.CreateDatabaseOptions{})
 
-		var respErr *azcore.ResponseError
+		assert.Contains(t, err.Error(), "401 Unauthorized")
-		if errors.As(err, &respErr) {
-			assert.Equal(t, respErr.StatusCode, http.StatusUnauthorized)
-		} else {
-			panic(err)
-		}
 	})
 
 	t.Run("Should allow unauthorized requests to /_explorer", func(t *testing.T) {
@@ -85,3 +59,33 @@ func Test_Authentication(t *testing.T) {
 		assert.Contains(t, string(responseBody), "BACKEND_ENDPOINT")
 	})
 }
+
+func Test_Authentication_Disabled(t *testing.T) {
+	ts := runTestServerCustomConfig(&config.ServerConfig{
+		AccountKey:              config.DefaultAccountKey,
+		ExplorerPath:            "/tmp/nothing",
+		ExplorerBaseUrlLocation: config.ExplorerBaseUrlLocation,
+		DisableAuth:             true,
+	})
+	defer ts.Server.Close()
+
+	t.Run("Should get 200 when wrong account key is used, but authentication is dissabled", func(t *testing.T) {
+		ts.DataStore.DeleteDatabase(testDatabaseName)
+		client, err := azcosmos.NewClientFromConnectionString(
+			formatConnectionString(ts.URL, "AAAA"),
+			&azcosmos.ClientOptions{},
+		)
+		assert.Nil(t, err)
+
+		createResponse, err := client.CreateDatabase(
+			context.TODO(),
+			azcosmos.DatabaseProperties{ID: testDatabaseName},
+			&azcosmos.CreateDatabaseOptions{})
+		assert.Nil(t, err)
+		assert.Equal(t, createResponse.DatabaseProperties.ID, testDatabaseName)
+	})
+}
+
+func formatConnectionString(endpoint, key string) string {
+	return fmt.Sprintf("AccountEndpoint=%s;AccountKey=%s", endpoint, key)
+}

api/tests/collections_test.go

@@ -3,33 +3,29 @@ package tests_test
 import (
 	"context"
 	"errors"
-	"fmt"
 	"net/http"
 	"testing"
 
 	"github.com/Azure/azure-sdk-for-go/sdk/azcore"
 	"github.com/Azure/azure-sdk-for-go/sdk/data/azcosmos"
-	"github.com/pikami/cosmium/api/config"
+	"github.com/pikami/cosmium/internal/datastore"
-	"github.com/pikami/cosmium/internal/repositories"
-	repositorymodels "github.com/pikami/cosmium/internal/repository_models"
 	"github.com/stretchr/testify/assert"
 )
 
 func Test_Collections(t *testing.T) {
-	ts := runTestServer()
+	presets := []testPreset{PresetJsonStore, PresetBadgerStore}
-	defer ts.Close()
 
-	client, err := azcosmos.NewClientFromConnectionString(
+	setUp := func(ts *TestServer, client *azcosmos.Client) *azcosmos.DatabaseClient {
-		fmt.Sprintf("AccountEndpoint=%s;AccountKey=%s", ts.URL, config.Config.AccountKey),
+		ts.DataStore.CreateDatabase(datastore.Database{ID: testDatabaseName})
-		&azcosmos.ClientOptions{},
-	)
-	assert.Nil(t, err)
-
-	repositories.CreateDatabase(repositorymodels.Database{ID: testDatabaseName})
 		databaseClient, err := client.NewDatabase(testDatabaseName)
 		assert.Nil(t, err)
 
-	t.Run("Collection Create", func(t *testing.T) {
+		return databaseClient
+	}
+
+	runTestsWithPresets(t, "Collection Create", presets, func(t *testing.T, ts *TestServer, client *azcosmos.Client) {
+		databaseClient := setUp(ts, client)
+
 		t.Run("Should create collection", func(t *testing.T) {
 			createResponse, err := databaseClient.CreateContainer(context.TODO(), azcosmos.ContainerProperties{
 				ID: testCollectionName,
@@ -40,7 +36,7 @@ func Test_Collections(t *testing.T) {
 		})
 
 		t.Run("Should return conflict when collection exists", func(t *testing.T) {
-			repositories.CreateCollection(testDatabaseName, repositorymodels.Collection{
+			ts.DataStore.CreateCollection(testDatabaseName, datastore.Collection{
 				ID: testCollectionName,
 			})
 
@@ -58,9 +54,11 @@ func Test_Collections(t *testing.T) {
 		})
 	})
 
-	t.Run("Collection Read", func(t *testing.T) {
+	runTestsWithPresets(t, "Collection Read", presets, func(t *testing.T, ts *TestServer, client *azcosmos.Client) {
+		databaseClient := setUp(ts, client)
+
 		t.Run("Should read collection", func(t *testing.T) {
-			repositories.CreateCollection(testDatabaseName, repositorymodels.Collection{
+			ts.DataStore.CreateCollection(testDatabaseName, datastore.Collection{
 				ID: testCollectionName,
 			})
 
@@ -74,7 +72,7 @@ func Test_Collections(t *testing.T) {
 		})
 
 		t.Run("Should return not found when collection does not exist", func(t *testing.T) {
-			repositories.DeleteCollection(testDatabaseName, testCollectionName)
+			ts.DataStore.DeleteCollection(testDatabaseName, testCollectionName)
 
 			collectionResponse, err := databaseClient.NewContainer(testCollectionName)
 			assert.Nil(t, err)
@@ -91,9 +89,11 @@ func Test_Collections(t *testing.T) {
 		})
 	})
 
-	t.Run("Collection Delete", func(t *testing.T) {
+	runTestsWithPresets(t, "Collection Delete", presets, func(t *testing.T, ts *TestServer, client *azcosmos.Client) {
+		databaseClient := setUp(ts, client)
+
 		t.Run("Should delete collection", func(t *testing.T) {
-			repositories.CreateCollection(testDatabaseName, repositorymodels.Collection{
+			ts.DataStore.CreateCollection(testDatabaseName, datastore.Collection{
 				ID: testCollectionName,
 			})
 
@@ -106,7 +106,7 @@ func Test_Collections(t *testing.T) {
 		})
 
 		t.Run("Should return not found when collection does not exist", func(t *testing.T) {
-			repositories.DeleteCollection(testDatabaseName, testCollectionName)
+			ts.DataStore.DeleteCollection(testDatabaseName, testCollectionName)
 
 			collectionResponse, err := databaseClient.NewContainer(testCollectionName)
 			assert.Nil(t, err)

api/tests/config_test.go

@@ -1,18 +1,64 @@
 package tests_test
 
 import (
+	"fmt"
 	"net/http/httptest"
+	"testing"
 
+	"github.com/Azure/azure-sdk-for-go/sdk/data/azcosmos"
 	"github.com/pikami/cosmium/api"
 	"github.com/pikami/cosmium/api/config"
+	"github.com/pikami/cosmium/internal/datastore"
+	badgerdatastore "github.com/pikami/cosmium/internal/datastore/badger_datastore"
+	jsondatastore "github.com/pikami/cosmium/internal/datastore/json_datastore"
+	"github.com/pikami/cosmium/internal/logger"
+	"github.com/stretchr/testify/assert"
 )
 
-func runTestServer() *httptest.Server {
+type TestServer struct {
-	config.Config.AccountKey = config.DefaultAccountKey
+	Server    *httptest.Server
-	config.Config.ExplorerPath = "/tmp/nothing"
+	DataStore datastore.DataStore
-	config.Config.ExplorerBaseUrlLocation = config.ExplorerBaseUrlLocation
+	URL       string
+}
 
-	return httptest.NewServer(api.CreateRouter())
+func getDefaultTestServerConfig() *config.ServerConfig {
+	return &config.ServerConfig{
+		AccountKey:              config.DefaultAccountKey,
+		ExplorerPath:            "/tmp/nothing",
+		ExplorerBaseUrlLocation: config.ExplorerBaseUrlLocation,
+		DataStore:               "json",
+	}
+}
+
+func runTestServerCustomConfig(configuration *config.ServerConfig) *TestServer {
+	var dataStore datastore.DataStore
+	switch configuration.DataStore {
+	case config.DataStoreBadger:
+		dataStore = badgerdatastore.NewBadgerDataStore(badgerdatastore.BadgerDataStoreOptions{})
+	default:
+		dataStore = jsondatastore.NewJsonDataStore(jsondatastore.JsonDataStoreOptions{})
+	}
+
+	api := api.NewApiServer(dataStore, configuration)
+
+	server := httptest.NewServer(api.GetRouter())
+
+	configuration.DatabaseEndpoint = server.URL
+
+	return &TestServer{
+		Server:    server,
+		DataStore: dataStore,
+		URL:       server.URL,
+	}
+}
+
+func runTestServer() *TestServer {
+	config := getDefaultTestServerConfig()
+
+	config.LogLevel = "debug"
+	logger.SetLogLevel(logger.LogLevelDebug)
+
+	return runTestServerCustomConfig(config)
 }
 
 const (
@@ -20,3 +66,47 @@ const (
 	testDatabaseName   = "test-db"
 	testCollectionName = "test-coll"
 )
+
+type testFunc func(t *testing.T, ts *TestServer, cosmosClient *azcosmos.Client)
+type testPreset string
+
+const (
+	PresetJsonStore   testPreset = "JsonDS"
+	PresetBadgerStore testPreset = "BadgerDS"
+)
+
+func runTestsWithPreset(t *testing.T, name string, testPreset testPreset, f testFunc) {
+	serverConfig := getDefaultTestServerConfig()
+
+	serverConfig.LogLevel = "debug"
+	logger.SetLogLevel(logger.LogLevelDebug)
+
+	switch testPreset {
+	case PresetBadgerStore:
+		serverConfig.DataStore = config.DataStoreBadger
+	case PresetJsonStore:
+		serverConfig.DataStore = config.DataStoreJson
+	}
+
+	ts := runTestServerCustomConfig(serverConfig)
+	defer ts.Server.Close()
+	defer ts.DataStore.Close()
+
+	client, err := azcosmos.NewClientFromConnectionString(
+		fmt.Sprintf("AccountEndpoint=%s;AccountKey=%s", ts.URL, config.DefaultAccountKey),
+		&azcosmos.ClientOptions{},
+	)
+	assert.Nil(t, err)
+
+	testName := fmt.Sprintf("%s_%s", testPreset, name)
+
+	t.Run(testName, func(t *testing.T) {
+		f(t, ts, client)
+	})
+}
+
+func runTestsWithPresets(t *testing.T, name string, testPresets []testPreset, f testFunc) {
+	for _, testPreset := range testPresets {
+		runTestsWithPreset(t, name, testPreset, f)
+	}
+}

api/tests/databases_test.go

@@ -3,31 +3,21 @@ package tests_test
 import (
 	"context"
 	"errors"
-	"fmt"
 	"net/http"
 	"testing"
 
 	"github.com/Azure/azure-sdk-for-go/sdk/azcore"
 	"github.com/Azure/azure-sdk-for-go/sdk/data/azcosmos"
-	"github.com/pikami/cosmium/api/config"
+	"github.com/pikami/cosmium/internal/datastore"
-	"github.com/pikami/cosmium/internal/repositories"
-	repositorymodels "github.com/pikami/cosmium/internal/repository_models"
 	"github.com/stretchr/testify/assert"
 )
 
 func Test_Databases(t *testing.T) {
-	ts := runTestServer()
+	presets := []testPreset{PresetJsonStore, PresetBadgerStore}
-	defer ts.Close()
 
-	client, err := azcosmos.NewClientFromConnectionString(
+	runTestsWithPresets(t, "Database Create", presets, func(t *testing.T, ts *TestServer, client *azcosmos.Client) {
-		fmt.Sprintf("AccountEndpoint=%s;AccountKey=%s", ts.URL, config.Config.AccountKey),
-		&azcosmos.ClientOptions{},
-	)
-	assert.Nil(t, err)
-
-	t.Run("Database Create", func(t *testing.T) {
 		t.Run("Should create database", func(t *testing.T) {
-			repositories.DeleteDatabase(testDatabaseName)
+			ts.DataStore.DeleteDatabase(testDatabaseName)
 
 			createResponse, err := client.CreateDatabase(context.TODO(), azcosmos.DatabaseProperties{
 				ID: testDatabaseName,
@@ -38,7 +28,7 @@ func Test_Databases(t *testing.T) {
 		})
 
 		t.Run("Should return conflict when database exists", func(t *testing.T) {
-			repositories.CreateDatabase(repositorymodels.Database{
+			ts.DataStore.CreateDatabase(datastore.Database{
 				ID: testDatabaseName,
 			})
 
@@ -56,9 +46,9 @@ func Test_Databases(t *testing.T) {
 		})
 	})
 
-	t.Run("Database Read", func(t *testing.T) {
+	runTestsWithPresets(t, "Database Read", presets, func(t *testing.T, ts *TestServer, client *azcosmos.Client) {
 		t.Run("Should read database", func(t *testing.T) {
-			repositories.CreateDatabase(repositorymodels.Database{
+			ts.DataStore.CreateDatabase(datastore.Database{
 				ID: testDatabaseName,
 			})
 
@@ -72,7 +62,7 @@ func Test_Databases(t *testing.T) {
 		})
 
 		t.Run("Should return not found when database does not exist", func(t *testing.T) {
-			repositories.DeleteDatabase(testDatabaseName)
+			ts.DataStore.DeleteDatabase(testDatabaseName)
 
 			databaseResponse, err := client.NewDatabase(testDatabaseName)
 			assert.Nil(t, err)
@@ -89,9 +79,9 @@ func Test_Databases(t *testing.T) {
 		})
 	})
 
-	t.Run("Database Delete", func(t *testing.T) {
+	runTestsWithPresets(t, "Database Delete", presets, func(t *testing.T, ts *TestServer, client *azcosmos.Client) {
 		t.Run("Should delete database", func(t *testing.T) {
-			repositories.CreateDatabase(repositorymodels.Database{
+			ts.DataStore.CreateDatabase(datastore.Database{
 				ID: testDatabaseName,
 			})
 
@@ -104,7 +94,7 @@ func Test_Databases(t *testing.T) {
 		})
 
 		t.Run("Should return not found when database does not exist", func(t *testing.T) {
-			repositories.DeleteDatabase(testDatabaseName)
+			ts.DataStore.DeleteDatabase(testDatabaseName)
 
 			databaseResponse, err := client.NewDatabase(testDatabaseName)
 			assert.Nil(t, err)

api/tests/documents_test.go

@@ -6,7 +6,6 @@ import (
 	"errors"
 	"fmt"
 	"net/http"
-	"net/http/httptest"
 	"reflect"
 	"sync"
 	"testing"
@@ -15,8 +14,7 @@ import (
 	"github.com/Azure/azure-sdk-for-go/sdk/azcore"
 	"github.com/Azure/azure-sdk-for-go/sdk/data/azcosmos"
 	"github.com/pikami/cosmium/api/config"
-	"github.com/pikami/cosmium/internal/repositories"
+	"github.com/pikami/cosmium/internal/datastore"
-	repositorymodels "github.com/pikami/cosmium/internal/repository_models"
 	"github.com/stretchr/testify/assert"
 )
 
@@ -55,9 +53,9 @@ func testCosmosQuery(t *testing.T,
 	}
 }
 
-func documents_InitializeDb(t *testing.T) (*httptest.Server, *azcosmos.ContainerClient) {
+func documents_InitializeDb(t *testing.T, ts *TestServer) *azcosmos.ContainerClient {
-	repositories.CreateDatabase(repositorymodels.Database{ID: testDatabaseName})
+	ts.DataStore.CreateDatabase(datastore.Database{ID: testDatabaseName})
-	repositories.CreateCollection(testDatabaseName, repositorymodels.Collection{
+	ts.DataStore.CreateCollection(testDatabaseName, datastore.Collection{
 		ID: testCollectionName,
 		PartitionKey: struct {
 			Paths   []string "json:\"paths\""
@@ -67,13 +65,11 @@ func documents_InitializeDb(t *testing.T) (*httptest.Server, *azcosmos.Container
 			Paths: []string{"/pk"},
 		},
 	})
-	repositories.CreateDocument(testDatabaseName, testCollectionName, map[string]interface{}{"id": "12345", "pk": "123", "isCool": false, "arr": []int{1, 2, 3}})
+	ts.DataStore.CreateDocument(testDatabaseName, testCollectionName, map[string]interface{}{"id": "12345", "pk": "123", "isCool": false, "arr": []int{1, 2, 3}})
-	repositories.CreateDocument(testDatabaseName, testCollectionName, map[string]interface{}{"id": "67890", "pk": "456", "isCool": true, "arr": []int{6, 7, 8}})
+	ts.DataStore.CreateDocument(testDatabaseName, testCollectionName, map[string]interface{}{"id": "67890", "pk": "456", "isCool": true, "arr": []int{6, 7, 8}})
-
-	ts := runTestServer()
 
 	client, err := azcosmos.NewClientFromConnectionString(
-		fmt.Sprintf("AccountEndpoint=%s;AccountKey=%s", ts.URL, config.Config.AccountKey),
+		fmt.Sprintf("AccountEndpoint=%s;AccountKey=%s", ts.URL, config.DefaultAccountKey),
 		&azcosmos.ClientOptions{},
 	)
 	assert.Nil(t, err)
@@ -81,12 +77,14 @@ func documents_InitializeDb(t *testing.T) (*httptest.Server, *azcosmos.Container
 	collectionClient, err := client.NewContainer(testDatabaseName, testCollectionName)
 	assert.Nil(t, err)
 
-	return ts, collectionClient
+	return collectionClient
 }
 
 func Test_Documents(t *testing.T) {
-	ts, collectionClient := documents_InitializeDb(t)
+	presets := []testPreset{PresetJsonStore, PresetBadgerStore}
-	defer ts.Close()
+
+	runTestsWithPresets(t, "Test_Documents", presets, func(t *testing.T, ts *TestServer, client *azcosmos.Client) {
+		collectionClient := documents_InitializeDb(t, ts)
 
 		t.Run("Should query document", func(t *testing.T) {
 			testCosmosQuery(t, collectionClient,
@@ -149,6 +147,21 @@ func Test_Documents(t *testing.T) {
 			)
 		})
 
+		t.Run("Should query document with query parameters as accessor", func(t *testing.T) {
+			testCosmosQuery(t, collectionClient,
+				`select c.id
+				FROM c
+				WHERE c[@param]="67890"
+				ORDER BY c.id`,
+				[]azcosmos.QueryParameter{
+					{Name: "@param", Value: "id"},
+				},
+				[]interface{}{
+					map[string]interface{}{"id": "67890"},
+				},
+			)
+		})
+
 		t.Run("Should query array accessor", func(t *testing.T) {
 			testCosmosQuery(t, collectionClient,
 				`SELECT c.id,
@@ -214,19 +227,21 @@ func Test_Documents(t *testing.T) {
 				}
 			}
 		})
-}
+	})
 
-func Test_Documents_Patch(t *testing.T) {
+	runTestsWithPresets(t, "Test_Documents_Patch", presets, func(t *testing.T, ts *TestServer, client *azcosmos.Client) {
-	ts, collectionClient := documents_InitializeDb(t)
+		collectionClient := documents_InitializeDb(t, ts)
-	defer ts.Close()
 
 		t.Run("Should PATCH document", func(t *testing.T) {
 			context := context.TODO()
-		expectedData := map[string]interface{}{"id": "67890", "pk": "456", "newField": "newValue"}
+			expectedData := map[string]interface{}{"id": "67890", "pk": "666", "newField": "newValue", "incr": 15., "setted": "isSet"}
 
 			patch := azcosmos.PatchOperations{}
 			patch.AppendAdd("/newField", "newValue")
+			patch.AppendIncrement("/incr", 15)
 			patch.AppendRemove("/isCool")
+			patch.AppendReplace("/pk", "666")
+			patch.AppendSet("/setted", "isSet")
 
 			itemResponse, err := collectionClient.PatchItem(
 				context,
@@ -239,13 +254,15 @@ func Test_Documents_Patch(t *testing.T) {
 			)
 			assert.Nil(t, err)
 
-		var itemResponseBody map[string]string
+			var itemResponseBody map[string]interface{}
 			json.Unmarshal(itemResponse.Value, &itemResponseBody)
 
 			assert.Equal(t, expectedData["id"], itemResponseBody["id"])
 			assert.Equal(t, expectedData["pk"], itemResponseBody["pk"])
 			assert.Empty(t, itemResponseBody["isCool"])
 			assert.Equal(t, expectedData["newField"], itemResponseBody["newField"])
+			assert.Equal(t, expectedData["incr"], itemResponseBody["incr"])
+			assert.Equal(t, expectedData["setted"], itemResponseBody["setted"])
 		})
 
 		t.Run("Should not allow to PATCH document ID", func(t *testing.T) {
@@ -359,5 +376,140 @@ func Test_Documents_Patch(t *testing.T) {
 			assert.NotNil(t, r)
 			assert.Nil(t, err2)
 		})
+	})
 
+	runTestsWithPresets(t, "Test_Documents_TransactionalBatch", presets, func(t *testing.T, ts *TestServer, client *azcosmos.Client) {
+		collectionClient := documents_InitializeDb(t, ts)
+
+		t.Run("Should execute CREATE transactional batch", func(t *testing.T) {
+			context := context.TODO()
+			batch := collectionClient.NewTransactionalBatch(azcosmos.NewPartitionKeyString("pk"))
+
+			newItem := map[string]interface{}{
+				"id": "678901",
+			}
+			bytes, err := json.Marshal(newItem)
+			assert.Nil(t, err)
+
+			batch.CreateItem(bytes, nil)
+			response, err := collectionClient.ExecuteTransactionalBatch(context, batch, &azcosmos.TransactionalBatchOptions{})
+			assert.Nil(t, err)
+			assert.True(t, response.Success)
+			assert.Equal(t, 1, len(response.OperationResults))
+
+			operationResponse := response.OperationResults[0]
+			assert.NotNil(t, operationResponse)
+			assert.NotNil(t, operationResponse.ResourceBody)
+			assert.Equal(t, int32(http.StatusCreated), operationResponse.StatusCode)
+
+			var itemResponseBody map[string]interface{}
+			json.Unmarshal(operationResponse.ResourceBody, &itemResponseBody)
+			assert.Equal(t, newItem["id"], itemResponseBody["id"])
+
+			createdDoc, _ := ts.DataStore.GetDocument(testDatabaseName, testCollectionName, newItem["id"].(string))
+			assert.Equal(t, newItem["id"], createdDoc["id"])
+		})
+
+		t.Run("Should execute DELETE transactional batch", func(t *testing.T) {
+			context := context.TODO()
+			batch := collectionClient.NewTransactionalBatch(azcosmos.NewPartitionKeyString("pk"))
+
+			batch.DeleteItem("12345", nil)
+			response, err := collectionClient.ExecuteTransactionalBatch(context, batch, &azcosmos.TransactionalBatchOptions{})
+			assert.Nil(t, err)
+			assert.True(t, response.Success)
+			assert.Equal(t, 1, len(response.OperationResults))
+
+			operationResponse := response.OperationResults[0]
+			assert.NotNil(t, operationResponse)
+			assert.Equal(t, int32(http.StatusNoContent), operationResponse.StatusCode)
+
+			_, status := ts.DataStore.GetDocument(testDatabaseName, testCollectionName, "12345")
+			assert.Equal(t, datastore.StatusNotFound, int(status))
+		})
+
+		t.Run("Should execute REPLACE transactional batch", func(t *testing.T) {
+			context := context.TODO()
+			batch := collectionClient.NewTransactionalBatch(azcosmos.NewPartitionKeyString("pk"))
+
+			newItem := map[string]interface{}{
+				"id": "67890",
+				"pk": "666",
+			}
+			bytes, err := json.Marshal(newItem)
+			assert.Nil(t, err)
+
+			batch.ReplaceItem("67890", bytes, nil)
+			response, err := collectionClient.ExecuteTransactionalBatch(context, batch, &azcosmos.TransactionalBatchOptions{})
+			assert.Nil(t, err)
+			assert.True(t, response.Success)
+			assert.Equal(t, 1, len(response.OperationResults))
+
+			operationResponse := response.OperationResults[0]
+			assert.NotNil(t, operationResponse)
+			assert.NotNil(t, operationResponse.ResourceBody)
+			assert.Equal(t, int32(http.StatusCreated), operationResponse.StatusCode)
+
+			var itemResponseBody map[string]interface{}
+			json.Unmarshal(operationResponse.ResourceBody, &itemResponseBody)
+			assert.Equal(t, newItem["id"], itemResponseBody["id"])
+			assert.Equal(t, newItem["pk"], itemResponseBody["pk"])
+
+			updatedDoc, _ := ts.DataStore.GetDocument(testDatabaseName, testCollectionName, newItem["id"].(string))
+			assert.Equal(t, newItem["id"], updatedDoc["id"])
+			assert.Equal(t, newItem["pk"], updatedDoc["pk"])
+		})
+
+		t.Run("Should execute UPSERT transactional batch", func(t *testing.T) {
+			context := context.TODO()
+			batch := collectionClient.NewTransactionalBatch(azcosmos.NewPartitionKeyString("pk"))
+
+			newItem := map[string]interface{}{
+				"id": "678901",
+				"pk": "666",
+			}
+			bytes, err := json.Marshal(newItem)
+			assert.Nil(t, err)
+
+			batch.UpsertItem(bytes, nil)
+			response, err := collectionClient.ExecuteTransactionalBatch(context, batch, &azcosmos.TransactionalBatchOptions{})
+			assert.Nil(t, err)
+			assert.True(t, response.Success)
+			assert.Equal(t, 1, len(response.OperationResults))
+
+			operationResponse := response.OperationResults[0]
+			assert.NotNil(t, operationResponse)
+			assert.NotNil(t, operationResponse.ResourceBody)
+			assert.Equal(t, int32(http.StatusCreated), operationResponse.StatusCode)
+
+			var itemResponseBody map[string]interface{}
+			json.Unmarshal(operationResponse.ResourceBody, &itemResponseBody)
+			assert.Equal(t, newItem["id"], itemResponseBody["id"])
+			assert.Equal(t, newItem["pk"], itemResponseBody["pk"])
+
+			updatedDoc, _ := ts.DataStore.GetDocument(testDatabaseName, testCollectionName, newItem["id"].(string))
+			assert.Equal(t, newItem["id"], updatedDoc["id"])
+			assert.Equal(t, newItem["pk"], updatedDoc["pk"])
+		})
+
+		t.Run("Should execute READ transactional batch", func(t *testing.T) {
+			context := context.TODO()
+			batch := collectionClient.NewTransactionalBatch(azcosmos.NewPartitionKeyString("pk"))
+
+			batch.ReadItem("67890", nil)
+			response, err := collectionClient.ExecuteTransactionalBatch(context, batch, &azcosmos.TransactionalBatchOptions{})
+			assert.Nil(t, err)
+			assert.True(t, response.Success)
+			assert.Equal(t, 1, len(response.OperationResults))
+
+			operationResponse := response.OperationResults[0]
+			assert.NotNil(t, operationResponse)
+			assert.NotNil(t, operationResponse.ResourceBody)
+			assert.Equal(t, int32(http.StatusOK), operationResponse.StatusCode)
+
+			var itemResponseBody map[string]interface{}
+			json.Unmarshal(operationResponse.ResourceBody, &itemResponseBody)
+			assert.Equal(t, "67890", itemResponseBody["id"])
+		})
+	})
 }

api/tests/documents_trailingslash_test.go

@@ -14,15 +14,16 @@ import (
 
 // Request document with trailing slash like python cosmosdb client does.
 func Test_Documents_Read_Trailing_Slash(t *testing.T) {
-	ts, _ := documents_InitializeDb(t)
+	ts := runTestServer()
-	defer ts.Close()
+	documents_InitializeDb(t, ts)
+	defer ts.Server.Close()
 
 	t.Run("Read doc with client that appends slash to path", func(t *testing.T) {
 		resourceIdTemplate := "dbs/%s/colls/%s/docs/%s"
 		path := fmt.Sprintf(resourceIdTemplate, testDatabaseName, testCollectionName, "12345")
 		testUrl := ts.URL + "/" + path + "/"
 		date := time.Now().Format(time.RFC1123)
-		signature := authentication.GenerateSignature("GET", "docs", path, date, config.Config.AccountKey)
+		signature := authentication.GenerateSignature("GET", "docs", path, date, config.DefaultAccountKey)
 		httpClient := &http.Client{}
 		req, _ := http.NewRequest("GET", testUrl, nil)
 		req.Header.Add("x-ms-date", date)

cmd/server/server.go

@@ -0,0 +1,54 @@
+package main
+
+import (
+	"os"
+	"os/signal"
+	"syscall"
+
+	"github.com/pikami/cosmium/api"
+	"github.com/pikami/cosmium/api/config"
+	"github.com/pikami/cosmium/internal/datastore"
+	badgerdatastore "github.com/pikami/cosmium/internal/datastore/badger_datastore"
+	jsondatastore "github.com/pikami/cosmium/internal/datastore/json_datastore"
+	"github.com/pikami/cosmium/internal/logger"
+)
+
+func main() {
+	configuration := config.ParseFlags()
+
+	var dataStore datastore.DataStore
+	switch configuration.DataStore {
+	case config.DataStoreBadger:
+		dataStore = badgerdatastore.NewBadgerDataStore(badgerdatastore.BadgerDataStoreOptions{
+			PersistDataFilePath: configuration.PersistDataFilePath,
+		})
+		logger.InfoLn("Using Badger data store")
+	default:
+		dataStore = jsondatastore.NewJsonDataStore(jsondatastore.JsonDataStoreOptions{
+			InitialDataFilePath: configuration.InitialDataFilePath,
+			PersistDataFilePath: configuration.PersistDataFilePath,
+		})
+		logger.InfoLn("Using in-memory data store")
+	}
+
+	server := api.NewApiServer(dataStore, &configuration)
+	err := server.Start()
+	if err != nil {
+		panic(err)
+	}
+
+	waitForExit(server, dataStore)
+}
+
+func waitForExit(server *api.ApiServer, dataStore datastore.DataStore) {
+	sigs := make(chan os.Signal, 1)
+	signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)
+
+	// Block until a exit signal is received
+	<-sigs
+
+	// Stop the server
+	server.Stop()
+
+	dataStore.Close()
+}

docs/COMPATIBILITY.md

@@ -65,9 +65,9 @@ Cosmium strives to support the core features of Cosmos DB, including:
 | Function           | Implemented |
 | ------------------ | ----------- |
 | ARRAY_CONCAT       | Yes         |
-| ARRAY_CONTAINS     | No          |
+| ARRAY_CONTAINS     | Yes         |
-| ARRAY_CONTAINS_ANY | No          |
+| ARRAY_CONTAINS_ANY | Yes         |
-| ARRAY_CONTAINS_ALL | No          |
+| ARRAY_CONTAINS_ALL | Yes         |
 | ARRAY_LENGTH       | Yes         |
 | ARRAY_SLICE        | Yes         |
 | CHOOSE             | No          |
@@ -79,7 +79,7 @@ Cosmium strives to support the core features of Cosmos DB, including:
 
 | Function | Implemented |
 | -------- | ----------- |
-| IIF      | No          |
+| IIF      | Yes         |
 
 ### Date and time Functions
 
@@ -204,6 +204,19 @@ Cosmium strives to support the core features of Cosmos DB, including:
 | IS_PRIMITIVE     | Yes         |
 | IS_STRING        | Yes         |
 
+### Transactional batch operations
+
+Note: There's actually no transaction here. Think of this as a 'bulk operation' that can partially succeed.
+
+| Operation | Implemented |
+| --------- | ----------- |
+| Create    | Yes         |
+| Delete    | Yes         |
+| Replace   | Yes         |
+| Upsert    | Yes         |
+| Read      | Yes         |
+| Patch     | No          |
+
 ## Known Differences
 
 While Cosmium aims to replicate the behavior of Cosmos DB as closely as possible, there are certain differences and limitations to be aware of:

go.mod

@@ -1,47 +1,60 @@
 module github.com/pikami/cosmium
 
-go 1.21.6
+go 1.24.0
 
 require (
-	github.com/Azure/azure-sdk-for-go/sdk/azcore v1.9.2
+	github.com/Azure/azure-sdk-for-go/sdk/azcore v1.18.0
-	github.com/Azure/azure-sdk-for-go/sdk/data/azcosmos v0.3.6
+	github.com/Azure/azure-sdk-for-go/sdk/data/azcosmos v1.4.0
-	github.com/evanphx/json-patch/v5 v5.9.0
+	github.com/cosmiumdev/json-patch/v5 v5.9.11
+	github.com/dgraph-io/badger/v4 v4.7.0
 	github.com/gin-gonic/gin v1.10.0
 	github.com/google/uuid v1.6.0
-	github.com/stretchr/testify v1.9.0
+	github.com/stretchr/testify v1.10.0
-	golang.org/x/exp v0.0.0-20240531132922-fd00a4e0eefc
+	github.com/vmihailenco/msgpack/v5 v5.4.1
+	golang.org/x/exp v0.0.0-20250506013437-ce4c2cf36ca6
 )
 
 require (
 	github.com/Azure/azure-sdk-for-go v68.0.0+incompatible // indirect
-	github.com/Azure/azure-sdk-for-go/sdk/internal v1.5.2 // indirect
+	github.com/Azure/azure-sdk-for-go/sdk/internal v1.11.1 // indirect
-	github.com/bytedance/sonic v1.11.8 // indirect
+	github.com/bytedance/sonic v1.13.2 // indirect
-	github.com/bytedance/sonic/loader v0.1.1 // indirect
+	github.com/bytedance/sonic/loader v0.2.4 // indirect
-	github.com/cloudwego/base64x v0.1.4 // indirect
+	github.com/cespare/xxhash/v2 v2.3.0 // indirect
-	github.com/cloudwego/iasm v0.2.0 // indirect
+	github.com/cloudwego/base64x v0.1.5 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
-	github.com/gabriel-vasile/mimetype v1.4.4 // indirect
+	github.com/dgraph-io/ristretto/v2 v2.2.0 // indirect
-	github.com/gin-contrib/sse v0.1.0 // indirect
+	github.com/dustin/go-humanize v1.0.1 // indirect
+	github.com/gabriel-vasile/mimetype v1.4.9 // indirect
+	github.com/gin-contrib/sse v1.1.0 // indirect
+	github.com/go-logr/logr v1.4.2 // indirect
+	github.com/go-logr/stdr v1.2.2 // indirect
 	github.com/go-playground/locales v0.14.1 // indirect
 	github.com/go-playground/universal-translator v0.18.1 // indirect
-	github.com/go-playground/validator/v10 v10.21.0 // indirect
+	github.com/go-playground/validator/v10 v10.26.0 // indirect
-	github.com/goccy/go-json v0.10.3 // indirect
+	github.com/goccy/go-json v0.10.5 // indirect
+	github.com/google/flatbuffers v25.2.10+incompatible // indirect
 	github.com/json-iterator/go v1.1.12 // indirect
-	github.com/klauspost/cpuid/v2 v2.2.7 // indirect
+	github.com/klauspost/compress v1.18.0 // indirect
+	github.com/klauspost/cpuid/v2 v2.2.10 // indirect
 	github.com/leodido/go-urn v1.4.0 // indirect
 	github.com/mattn/go-isatty v0.0.20 // indirect
 	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
 	github.com/modern-go/reflect2 v1.0.2 // indirect
-	github.com/pelletier/go-toml/v2 v2.2.2 // indirect
+	github.com/pelletier/go-toml/v2 v2.2.4 // indirect
 	github.com/pkg/errors v0.9.1 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/twitchyliquid64/golang-asm v0.15.1 // indirect
 	github.com/ugorji/go/codec v1.2.12 // indirect
-	golang.org/x/arch v0.8.0 // indirect
+	github.com/vmihailenco/tagparser/v2 v2.0.0 // indirect
-	golang.org/x/crypto v0.23.0 // indirect
+	go.opentelemetry.io/auto/sdk v1.1.0 // indirect
-	golang.org/x/net v0.25.0 // indirect
+	go.opentelemetry.io/otel v1.35.0 // indirect
-	golang.org/x/sys v0.20.0 // indirect
+	go.opentelemetry.io/otel/metric v1.35.0 // indirect
-	golang.org/x/text v0.15.0 // indirect
+	go.opentelemetry.io/otel/trace v1.35.0 // indirect
-	google.golang.org/protobuf v1.34.1 // indirect
+	golang.org/x/arch v0.17.0 // indirect
+	golang.org/x/crypto v0.38.0 // indirect
+	golang.org/x/net v0.40.0 // indirect
+	golang.org/x/sys v0.33.0 // indirect
+	golang.org/x/text v0.25.0 // indirect
+	google.golang.org/protobuf v1.36.6 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

go.sum

@@ -1,57 +1,102 @@
 github.com/Azure/azure-sdk-for-go v68.0.0+incompatible h1:fcYLmCpyNYRnvJbPerq7U0hS+6+I79yEDJBqVNcqUzU=
 github.com/Azure/azure-sdk-for-go v68.0.0+incompatible/go.mod h1:9XXNKU+eRnpl9moKnB4QOLf1HestfXbmab5FXxiDBjc=
-github.com/Azure/azure-sdk-for-go/sdk/azcore v1.9.2 h1:c4k2FIYIh4xtwqrQwV0Ct1v5+ehlNXj5NI/MWVsiTkQ=
+github.com/Azure/azure-sdk-for-go/sdk/azcore v1.17.0 h1:g0EZJwz7xkXQiZAI5xi9f3WWFYBlX1CPTrR+NDToRkQ=
-github.com/Azure/azure-sdk-for-go/sdk/azcore v1.9.2/go.mod h1:5FDJtLEO/GxwNgUxbwrY3LP0pEoThTQJtk2oysdXHxM=
+github.com/Azure/azure-sdk-for-go/sdk/azcore v1.17.0/go.mod h1:XCW7KnZet0Opnr7HccfUw1PLc4CjHqpcaxW8DHklNkQ=
-github.com/Azure/azure-sdk-for-go/sdk/azidentity v1.0.0 h1:Yoicul8bnVdQrhDMTHxdEckRGX01XvwXDHUT9zYZ3k0=
+github.com/Azure/azure-sdk-for-go/sdk/azcore v1.18.0 h1:Gt0j3wceWMwPmiazCa8MzMA0MfhmPIz0Qp0FJ6qcM0U=
-github.com/Azure/azure-sdk-for-go/sdk/azidentity v1.0.0/go.mod h1:+6sju8gk8FRmSajX3Oz4G5Gm7P+mbqE9FVaXXFYTkCM=
+github.com/Azure/azure-sdk-for-go/sdk/azcore v1.18.0/go.mod h1:Ot/6aikWnKWi4l9QB7qVSwa8iMphQNqkWALMoNT3rzM=
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+github.com/pelletier/go-toml/v2 v2.2.4 h1:mye9XuhQ6gvn5h28+VilKrrPoQVanw5PMw/TB0t5Ec4=
-github.com/pkg/browser v0.0.0-20210115035449-ce105d075bb4/go.mod h1:N6UoU20jOqggOuDwUaBQpluzLNDqif3kq9z2wpdYEfQ=
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+github.com/pkg/browser v0.0.0-20240102092130-5ac0b6a4141c/go.mod h1:7rwL4CYBLnjLxUqIJNnCWiEdr3bn6IUYi15bNlnbCCU=
 github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
 github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/rogpeppe/go-internal v1.13.1 h1:KvO1DLK/DRN07sQ1LQKScxyZJuNnedQ5/wKSR38lUII=
+github.com/rogpeppe/go-internal v1.13.1/go.mod h1:uMEvuHeurkdAXX61udpOXGD/AzZDWNMNyH2VO9fmH0o=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
 github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpEOglKo=
@@ -81,33 +130,57 @@ github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/
 github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
 github.com/stretchr/testify v1.8.1/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
 github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
-github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
+github.com/stretchr/testify v1.10.0 h1:Xv5erBjTwe/5IxqUQTdXv5kgmIvbHo3QQyRwhJsOfJA=
-github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
+github.com/stretchr/testify v1.10.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
 github.com/twitchyliquid64/golang-asm v0.15.1 h1:SU5vSMR7hnwNxj24w34ZyCi/FmDZTkS4MhqMhdFk5YI=
 github.com/twitchyliquid64/golang-asm v0.15.1/go.mod h1:a1lVb/DtPvCB8fslRZhAngC2+aY1QWCk3Cedj/Gdt08=
 github.com/ugorji/go/codec v1.2.12 h1:9LC83zGrHhuUA9l16C9AHXAqEV/2wBQ4nkvumAE65EE=
 github.com/ugorji/go/codec v1.2.12/go.mod h1:UNopzCgEMSXjBc6AOMqYvWC1ktqTAfzJZUZgYf6w6lg=
-golang.org/x/arch v0.0.0-20210923205945-b76863e36670/go.mod h1:5om86z9Hs0C8fWVUuoMHwpExlXzs5Tkyp9hOrfG7pp8=
+github.com/vmihailenco/msgpack/v5 v5.4.1 h1:cQriyiUvjTwOHg8QZaPihLWeRAAVoCpE00IUPn0Bjt8=
-golang.org/x/arch v0.8.0 h1:3wRIsP3pM4yUptoR96otTUOXI367OS0+c9eeRi9doIc=
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-golang.org/x/arch v0.8.0/go.mod h1:FEVrYAQjsQXMVJ1nsMoVVXPZg6p2JE2mx8psSWTDQys=
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-golang.org/x/crypto v0.23.0 h1:dIJU/v2J8Mdglj/8rJ6UUOM3Zc9zLZxVZwwxMooUSAI=
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-golang.org/x/crypto v0.23.0/go.mod h1:CKFgDieR+mRhux2Lsu27y0fO304Db0wZe70UKqHu0v8=
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-golang.org/x/exp v0.0.0-20240531132922-fd00a4e0eefc h1:O9NuF4s+E/PvMIy+9IUZB9znFwUIXEWSstNjek6VpVg=
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-golang.org/x/exp v0.0.0-20240531132922-fd00a4e0eefc/go.mod h1:XtvwrStGgqGPLc4cjQfWqZHG1YFdYs6swckp8vpsjnc=
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-golang.org/x/net v0.25.0/go.mod h1:JkAGAh7GEvH74S6FOH42FLoXpXbE/aqXSrIQjXgsiwM=
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-golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
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 nullprogram.com/x/optparse v1.0.0/go.mod h1:KdyPE+Igbe0jQUrVfMqDMeJQIJZEuyV7pjYmp6pbG50=
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internal/constants/responses.go

@@ -30,3 +30,8 @@ var QueryPlanResponse = gin.H{
 		},
 	},
 }
+
+var UnknownErrorResponse = gin.H{"message": "Unknown error"}
+var NotFoundResponse = gin.H{"message": "NotFound"}
+var ConflictResponse = gin.H{"message": "Conflict"}
+var BadRequestResponse = gin.H{"message": "BadRequest"}

internal/converters/document_to_rowtype.go

@@ -0,0 +1,20 @@
+package converters
+
+import (
+	"github.com/pikami/cosmium/internal/datastore"
+	memoryexecutor "github.com/pikami/cosmium/query_executors/memory_executor"
+)
+
+type DocumentToRowTypeIterator struct {
+	documents datastore.DocumentIterator
+}
+
+func NewDocumentToRowTypeIterator(documents datastore.DocumentIterator) *DocumentToRowTypeIterator {
+	return &DocumentToRowTypeIterator{
+		documents: documents,
+	}
+}
+
+func (di *DocumentToRowTypeIterator) Next() (memoryexecutor.RowType, datastore.DataStoreStatus) {
+	return di.documents.Next()
+}

internal/datastore/badger_datastore/badger_datastore.go

@@ -0,0 +1,66 @@
+package badgerdatastore
+
+import (
+	"time"
+
+	"github.com/dgraph-io/badger/v4"
+	"github.com/pikami/cosmium/internal/logger"
+)
+
+type BadgerDataStore struct {
+	db       *badger.DB
+	gcTicker *time.Ticker
+}
+
+type BadgerDataStoreOptions struct {
+	PersistDataFilePath string
+}
+
+func NewBadgerDataStore(options BadgerDataStoreOptions) *BadgerDataStore {
+	badgerOpts := badger.DefaultOptions(options.PersistDataFilePath)
+	badgerOpts = badgerOpts.WithLogger(newBadgerLogger())
+	if options.PersistDataFilePath == "" {
+		badgerOpts = badgerOpts.WithInMemory(true)
+	}
+
+	db, err := badger.Open(badgerOpts)
+	if err != nil {
+		panic(err)
+	}
+
+	gcTicker := time.NewTicker(5 * time.Minute)
+
+	ds := &BadgerDataStore{
+		db:       db,
+		gcTicker: gcTicker,
+	}
+
+	go ds.runGarbageCollector()
+
+	return ds
+}
+
+func (r *BadgerDataStore) Close() {
+	if r.gcTicker != nil {
+		r.gcTicker.Stop()
+		r.gcTicker = nil
+	}
+
+	r.db.Close()
+	r.db = nil
+}
+
+func (r *BadgerDataStore) DumpToJson() (string, error) {
+	logger.ErrorLn("Badger datastore does not support state export currently.")
+	return "{}", nil
+}
+
+func (r *BadgerDataStore) runGarbageCollector() {
+	for range r.gcTicker.C {
+	again:
+		err := r.db.RunValueLogGC(0.7)
+		if err == nil {
+			goto again
+		}
+	}
+}

internal/datastore/badger_datastore/badger_logger.go

@@ -0,0 +1,28 @@
+package badgerdatastore
+
+import (
+	"github.com/dgraph-io/badger/v4"
+	"github.com/pikami/cosmium/internal/logger"
+)
+
+type badgerLogger struct{}
+
+func newBadgerLogger() badger.Logger {
+	return &badgerLogger{}
+}
+
+func (l *badgerLogger) Errorf(format string, v ...interface{}) {
+	logger.Errorf(format, v...)
+}
+
+func (l *badgerLogger) Warningf(format string, v ...interface{}) {
+	logger.Infof(format, v...)
+}
+
+func (l *badgerLogger) Infof(format string, v ...interface{}) {
+	logger.Infof(format, v...)
+}
+
+func (l *badgerLogger) Debugf(format string, v ...interface{}) {
+	logger.Debugf(format, v...)
+}

internal/datastore/badger_datastore/collections.go

@@ -0,0 +1,103 @@
+package badgerdatastore
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/google/uuid"
+	"github.com/pikami/cosmium/internal/datastore"
+	"github.com/pikami/cosmium/internal/logger"
+	"github.com/pikami/cosmium/internal/resourceid"
+	structhidrators "github.com/pikami/cosmium/internal/struct_hidrators"
+)
+
+func (r *BadgerDataStore) GetAllCollections(databaseId string) ([]datastore.Collection, datastore.DataStoreStatus) {
+	exists, err := keyExists(r.db.NewTransaction(false), generateDatabaseKey(databaseId))
+	if err != nil {
+		logger.ErrorLn("Error while checking if database exists:", err)
+		return nil, datastore.Unknown
+	}
+
+	if !exists {
+		return nil, datastore.StatusNotFound
+	}
+
+	colls, status := listByPrefix[datastore.Collection](r.db, generateKey(resourceid.ResourceTypeCollection, databaseId, "", ""))
+	if status == datastore.StatusOk {
+		return colls, datastore.StatusOk
+	}
+
+	return nil, status
+}
+
+func (r *BadgerDataStore) GetCollection(databaseId string, collectionId string) (datastore.Collection, datastore.DataStoreStatus) {
+	collectionKey := generateCollectionKey(databaseId, collectionId)
+
+	txn := r.db.NewTransaction(false)
+	defer txn.Discard()
+
+	var collection datastore.Collection
+	status := getKey(txn, collectionKey, &collection)
+
+	return collection, status
+}
+
+func (r *BadgerDataStore) DeleteCollection(databaseId string, collectionId string) datastore.DataStoreStatus {
+	collectionKey := generateCollectionKey(databaseId, collectionId)
+
+	txn := r.db.NewTransaction(true)
+	defer txn.Discard()
+
+	prefixes := []string{
+		generateKey(resourceid.ResourceTypeDocument, databaseId, collectionId, ""),
+		generateKey(resourceid.ResourceTypeTrigger, databaseId, collectionId, ""),
+		generateKey(resourceid.ResourceTypeStoredProcedure, databaseId, collectionId, ""),
+		generateKey(resourceid.ResourceTypeUserDefinedFunction, databaseId, collectionId, ""),
+		collectionKey,
+	}
+	for _, prefix := range prefixes {
+		if err := deleteKeysByPrefix(txn, prefix); err != nil {
+			return datastore.Unknown
+		}
+	}
+
+	err := txn.Commit()
+	if err != nil {
+		logger.ErrorLn("Error while committing transaction:", err)
+		return datastore.Unknown
+	}
+
+	return datastore.StatusOk
+}
+
+func (r *BadgerDataStore) CreateCollection(databaseId string, newCollection datastore.Collection) (datastore.Collection, datastore.DataStoreStatus) {
+	collectionKey := generateCollectionKey(databaseId, newCollection.ID)
+
+	txn := r.db.NewTransaction(true)
+	defer txn.Discard()
+
+	collectionExists, err := keyExists(txn, collectionKey)
+	if err != nil || collectionExists {
+		return datastore.Collection{}, datastore.Conflict
+	}
+
+	var database datastore.Database
+	status := getKey(txn, generateDatabaseKey(databaseId), &database)
+	if status != datastore.StatusOk {
+		return datastore.Collection{}, status
+	}
+
+	newCollection = structhidrators.Hidrate(newCollection).(datastore.Collection)
+
+	newCollection.TimeStamp = time.Now().Unix()
+	newCollection.ResourceID = resourceid.NewCombined(database.ResourceID, resourceid.New(resourceid.ResourceTypeCollection))
+	newCollection.ETag = fmt.Sprintf("\"%s\"", uuid.New())
+	newCollection.Self = fmt.Sprintf("dbs/%s/colls/%s/", database.ResourceID, newCollection.ResourceID)
+
+	status = insertKey(txn, collectionKey, newCollection)
+	if status != datastore.StatusOk {
+		return datastore.Collection{}, status
+	}
+
+	return newCollection, datastore.StatusOk
+}

internal/datastore/badger_datastore/databases.go

@@ -0,0 +1,80 @@
+package badgerdatastore
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/google/uuid"
+	"github.com/pikami/cosmium/internal/datastore"
+	"github.com/pikami/cosmium/internal/logger"
+	"github.com/pikami/cosmium/internal/resourceid"
+)
+
+func (r *BadgerDataStore) GetAllDatabases() ([]datastore.Database, datastore.DataStoreStatus) {
+	dbs, status := listByPrefix[datastore.Database](r.db, DatabaseKeyPrefix)
+	if status == datastore.StatusOk {
+		return dbs, datastore.StatusOk
+	}
+
+	return nil, status
+}
+
+func (r *BadgerDataStore) GetDatabase(id string) (datastore.Database, datastore.DataStoreStatus) {
+	databaseKey := generateDatabaseKey(id)
+
+	txn := r.db.NewTransaction(false)
+	defer txn.Discard()
+
+	var database datastore.Database
+	status := getKey(txn, databaseKey, &database)
+
+	return database, status
+}
+
+func (r *BadgerDataStore) DeleteDatabase(id string) datastore.DataStoreStatus {
+	databaseKey := generateDatabaseKey(id)
+
+	txn := r.db.NewTransaction(true)
+	defer txn.Discard()
+
+	prefixes := []string{
+		generateKey(resourceid.ResourceTypeCollection, id, "", ""),
+		generateKey(resourceid.ResourceTypeDocument, id, "", ""),
+		generateKey(resourceid.ResourceTypeTrigger, id, "", ""),
+		generateKey(resourceid.ResourceTypeStoredProcedure, id, "", ""),
+		generateKey(resourceid.ResourceTypeUserDefinedFunction, id, "", ""),
+		databaseKey,
+	}
+	for _, prefix := range prefixes {
+		if err := deleteKeysByPrefix(txn, prefix); err != nil {
+			return datastore.Unknown
+		}
+	}
+
+	err := txn.Commit()
+	if err != nil {
+		logger.ErrorLn("Error while committing transaction:", err)
+		return datastore.Unknown
+	}
+
+	return datastore.StatusOk
+}
+
+func (r *BadgerDataStore) CreateDatabase(newDatabase datastore.Database) (datastore.Database, datastore.DataStoreStatus) {
+	databaseKey := generateDatabaseKey(newDatabase.ID)
+
+	txn := r.db.NewTransaction(true)
+	defer txn.Discard()
+
+	newDatabase.TimeStamp = time.Now().Unix()
+	newDatabase.ResourceID = resourceid.New(resourceid.ResourceTypeDatabase)
+	newDatabase.ETag = fmt.Sprintf("\"%s\"", uuid.New())
+	newDatabase.Self = fmt.Sprintf("dbs/%s/", newDatabase.ResourceID)
+
+	status := insertKey(txn, databaseKey, newDatabase)
+	if status != datastore.StatusOk {
+		return datastore.Database{}, status
+	}
+
+	return newDatabase, datastore.StatusOk
+}

internal/datastore/badger_datastore/db_abstractions.go

@@ -0,0 +1,204 @@
+package badgerdatastore
+
+import (
+	"github.com/dgraph-io/badger/v4"
+	"github.com/pikami/cosmium/internal/datastore"
+	"github.com/pikami/cosmium/internal/logger"
+	"github.com/pikami/cosmium/internal/resourceid"
+	"github.com/vmihailenco/msgpack/v5"
+)
+
+const (
+	DatabaseKeyPrefix            = "DB:"
+	CollectionKeyPrefix          = "COL:"
+	DocumentKeyPrefix            = "DOC:"
+	TriggerKeyPrefix             = "TRG:"
+	StoredProcedureKeyPrefix     = "SP:"
+	UserDefinedFunctionKeyPrefix = "UDF:"
+)
+
+func generateKey(
+	resourceType resourceid.ResourceType,
+	databaseId string,
+	collectionId string,
+	resourceId string,
+) string {
+	result := ""
+
+	switch resourceType {
+	case resourceid.ResourceTypeDatabase:
+		result += DatabaseKeyPrefix
+	case resourceid.ResourceTypeCollection:
+		result += CollectionKeyPrefix
+	case resourceid.ResourceTypeDocument:
+		result += DocumentKeyPrefix
+	case resourceid.ResourceTypeTrigger:
+		result += TriggerKeyPrefix
+	case resourceid.ResourceTypeStoredProcedure:
+		result += StoredProcedureKeyPrefix
+	case resourceid.ResourceTypeUserDefinedFunction:
+		result += UserDefinedFunctionKeyPrefix
+	}
+
+	if databaseId != "" {
+		result += databaseId
+	}
+
+	if collectionId != "" {
+		result += "/colls/" + collectionId
+	}
+
+	if resourceId != "" {
+		result += "/" + resourceId
+	}
+
+	return result
+}
+
+func generateDatabaseKey(databaseId string) string {
+	return generateKey(resourceid.ResourceTypeDatabase, databaseId, "", "")
+}
+
+func generateCollectionKey(databaseId string, collectionId string) string {
+	return generateKey(resourceid.ResourceTypeCollection, databaseId, collectionId, "")
+}
+
+func generateDocumentKey(databaseId string, collectionId string, documentId string) string {
+	return generateKey(resourceid.ResourceTypeDocument, databaseId, collectionId, documentId)
+}
+
+func generateTriggerKey(databaseId string, collectionId string, triggerId string) string {
+	return generateKey(resourceid.ResourceTypeTrigger, databaseId, collectionId, triggerId)
+}
+
+func generateStoredProcedureKey(databaseId string, collectionId string, storedProcedureId string) string {
+	return generateKey(resourceid.ResourceTypeStoredProcedure, databaseId, collectionId, storedProcedureId)
+}
+
+func generateUserDefinedFunctionKey(databaseId string, collectionId string, udfId string) string {
+	return generateKey(resourceid.ResourceTypeUserDefinedFunction, databaseId, collectionId, udfId)
+}
+
+func insertKey(txn *badger.Txn, key string, value interface{}) datastore.DataStoreStatus {
+	_, err := txn.Get([]byte(key))
+	if err == nil {
+		return datastore.Conflict
+	}
+
+	if err != badger.ErrKeyNotFound {
+		logger.ErrorLn("Error while checking if key exists:", err)
+		return datastore.Unknown
+	}
+
+	buf, err := msgpack.Marshal(value)
+	if err != nil {
+		logger.ErrorLn("Error while encoding value:", err)
+		return datastore.Unknown
+	}
+
+	err = txn.Set([]byte(key), buf)
+	if err != nil {
+		logger.ErrorLn("Error while setting key:", err)
+		return datastore.Unknown
+	}
+
+	err = txn.Commit()
+	if err != nil {
+		logger.ErrorLn("Error while committing transaction:", err)
+		return datastore.Unknown
+	}
+
+	return datastore.StatusOk
+}
+
+func getKey(txn *badger.Txn, key string, value interface{}) datastore.DataStoreStatus {
+	item, err := txn.Get([]byte(key))
+	if err != nil {
+		if err == badger.ErrKeyNotFound {
+			return datastore.StatusNotFound
+		}
+		logger.ErrorLn("Error while getting key:", err)
+		return datastore.Unknown
+	}
+
+	val, err := item.ValueCopy(nil)
+	if err != nil {
+		logger.ErrorLn("Error while copying value:", err)
+		return datastore.Unknown
+	}
+
+	if value == nil {
+		logger.ErrorLn("getKey called with nil value")
+		return datastore.Unknown
+	}
+
+	err = msgpack.Unmarshal(val, &value)
+	if err != nil {
+		logger.ErrorLn("Error while decoding value:", err)
+		return datastore.Unknown
+	}
+
+	return datastore.StatusOk
+}
+
+func keyExists(txn *badger.Txn, key string) (bool, error) {
+	_, err := txn.Get([]byte(key))
+	if err == nil {
+		return true, nil
+	}
+
+	if err == badger.ErrKeyNotFound {
+		return false, nil
+	}
+
+	return false, err
+}
+
+func listByPrefix[T any](db *badger.DB, prefix string) ([]T, datastore.DataStoreStatus) {
+	results := make([]T, 0)
+
+	err := db.View(func(txn *badger.Txn) error {
+		opts := badger.DefaultIteratorOptions
+		opts.Prefix = []byte(prefix)
+		it := txn.NewIterator(opts)
+		defer it.Close()
+
+		for it.Rewind(); it.Valid(); it.Next() {
+			item := it.Item()
+			var entry T
+
+			status := getKey(txn, string(item.Key()), &entry)
+			if status != datastore.StatusOk {
+				logger.ErrorLn("Failed to retrieve entry:", string(item.Key()))
+				continue
+			}
+
+			results = append(results, entry)
+		}
+		return nil
+	})
+
+	if err != nil {
+		logger.ErrorLn("Error while listing entries:", err)
+		return nil, datastore.Unknown
+	}
+
+	return results, datastore.StatusOk
+}
+
+func deleteKeysByPrefix(txn *badger.Txn, prefix string) error {
+	opts := badger.DefaultIteratorOptions
+	opts.Prefix = []byte(prefix)
+	it := txn.NewIterator(opts)
+	defer it.Close()
+
+	for it.Rewind(); it.Valid(); it.Next() {
+		key := it.Item().KeyCopy(nil)
+		if err := txn.Delete(key); err != nil {
+			logger.ErrorLn("Failed to delete key:", string(key), "Error:", err)
+			return err
+		}
+	}
+
+	return nil
+}

internal/datastore/badger_datastore/document_iterator.go

@@ -0,0 +1,58 @@
+package badgerdatastore
+
+import (
+	"github.com/dgraph-io/badger/v4"
+	"github.com/pikami/cosmium/internal/datastore"
+	"github.com/pikami/cosmium/internal/logger"
+	"github.com/vmihailenco/msgpack/v5"
+)
+
+type BadgerDocumentIterator struct {
+	txn    *badger.Txn
+	it     *badger.Iterator
+	prefix string
+}
+
+func NewBadgerDocumentIterator(txn *badger.Txn, prefix string) *BadgerDocumentIterator {
+	opts := badger.DefaultIteratorOptions
+	opts.Prefix = []byte(prefix)
+
+	it := txn.NewIterator(opts)
+	it.Rewind()
+
+	return &BadgerDocumentIterator{
+		txn:    txn,
+		it:     it,
+		prefix: prefix,
+	}
+}
+
+func (i *BadgerDocumentIterator) Next() (datastore.Document, datastore.DataStoreStatus) {
+	if !i.it.Valid() {
+		i.it.Close()
+		return datastore.Document{}, datastore.IterEOF
+	}
+
+	item := i.it.Item()
+	val, err := item.ValueCopy(nil)
+	if err != nil {
+		logger.ErrorLn("Error while copying value:", err)
+		return datastore.Document{}, datastore.Unknown
+	}
+
+	current := &datastore.Document{}
+	err = msgpack.Unmarshal(val, &current)
+	if err != nil {
+		logger.ErrorLn("Error while decoding value:", err)
+		return datastore.Document{}, datastore.Unknown
+	}
+
+	i.it.Next()
+
+	return *current, datastore.StatusOk
+}
+
+func (i *BadgerDocumentIterator) Close() {
+	i.it.Close()
+	i.txn.Discard()
+}

internal/datastore/badger_datastore/documents.go

@@ -0,0 +1,127 @@
+package badgerdatastore
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/google/uuid"
+	"github.com/pikami/cosmium/internal/datastore"
+	"github.com/pikami/cosmium/internal/logger"
+	"github.com/pikami/cosmium/internal/resourceid"
+)
+
+func (r *BadgerDataStore) GetAllDocuments(databaseId string, collectionId string) ([]datastore.Document, datastore.DataStoreStatus) {
+	txn := r.db.NewTransaction(false)
+	defer txn.Discard()
+
+	dbExists, err := keyExists(txn, generateDatabaseKey(databaseId))
+	if err != nil || !dbExists {
+		return nil, datastore.StatusNotFound
+	}
+
+	collExists, err := keyExists(txn, generateCollectionKey(databaseId, collectionId))
+	if err != nil || !collExists {
+		return nil, datastore.StatusNotFound
+	}
+
+	docs, status := listByPrefix[datastore.Document](r.db, generateKey(resourceid.ResourceTypeDocument, databaseId, collectionId, ""))
+	if status == datastore.StatusOk {
+		return docs, datastore.StatusOk
+	}
+
+	return nil, status
+}
+
+func (r *BadgerDataStore) GetDocumentIterator(databaseId string, collectionId string) (datastore.DocumentIterator, datastore.DataStoreStatus) {
+	txn := r.db.NewTransaction(false)
+
+	dbExists, err := keyExists(txn, generateDatabaseKey(databaseId))
+	if err != nil || !dbExists {
+		return nil, datastore.StatusNotFound
+	}
+
+	collExists, err := keyExists(txn, generateCollectionKey(databaseId, collectionId))
+	if err != nil || !collExists {
+		return nil, datastore.StatusNotFound
+	}
+
+	iter := NewBadgerDocumentIterator(txn, generateKey(resourceid.ResourceTypeDocument, databaseId, collectionId, ""))
+	return iter, datastore.StatusOk
+}
+
+func (r *BadgerDataStore) GetDocument(databaseId string, collectionId string, documentId string) (datastore.Document, datastore.DataStoreStatus) {
+	documentKey := generateDocumentKey(databaseId, collectionId, documentId)
+
+	txn := r.db.NewTransaction(false)
+	defer txn.Discard()
+
+	var document datastore.Document
+	status := getKey(txn, documentKey, &document)
+
+	return document, status
+}
+
+func (r *BadgerDataStore) DeleteDocument(databaseId string, collectionId string, documentId string) datastore.DataStoreStatus {
+	documentKey := generateDocumentKey(databaseId, collectionId, documentId)
+
+	txn := r.db.NewTransaction(true)
+	defer txn.Discard()
+
+	exists, err := keyExists(txn, documentKey)
+	if err != nil {
+		return datastore.Unknown
+	}
+	if !exists {
+		return datastore.StatusNotFound
+	}
+
+	err = txn.Delete([]byte(documentKey))
+	if err != nil {
+		logger.ErrorLn("Error while deleting document:", err)
+		return datastore.Unknown
+	}
+
+	err = txn.Commit()
+	if err != nil {
+		logger.ErrorLn("Error while committing transaction:", err)
+		return datastore.Unknown
+	}
+
+	return datastore.StatusOk
+}
+
+func (r *BadgerDataStore) CreateDocument(databaseId string, collectionId string, document map[string]interface{}) (datastore.Document, datastore.DataStoreStatus) {
+	txn := r.db.NewTransaction(true)
+	defer txn.Discard()
+
+	var database datastore.Database
+	status := getKey(txn, generateDatabaseKey(databaseId), &database)
+	if status != datastore.StatusOk {
+		return datastore.Document{}, status
+	}
+
+	var collection datastore.Collection
+	status = getKey(txn, generateCollectionKey(databaseId, collectionId), &collection)
+	if status != datastore.StatusOk {
+		return datastore.Document{}, status
+	}
+
+	var ok bool
+	var documentId string
+	if documentId, ok = document["id"].(string); !ok || documentId == "" {
+		documentId = fmt.Sprint(uuid.New())
+		document["id"] = documentId
+	}
+
+	document["_ts"] = time.Now().Unix()
+	document["_rid"] = resourceid.NewCombined(collection.ResourceID, resourceid.New(resourceid.ResourceTypeDocument))
+	document["_etag"] = fmt.Sprintf("\"%s\"", uuid.New())
+	document["_self"] = fmt.Sprintf("dbs/%s/colls/%s/docs/%s/", database.ResourceID, collection.ResourceID, document["_rid"])
+
+	status = insertKey(txn, generateDocumentKey(databaseId, collectionId, documentId), document)
+	if status != datastore.StatusOk {
+		return datastore.Document{}, status
+	}
+
+	return document, datastore.StatusOk
+}

internal/datastore/badger_datastore/partition_key_ranges.go

@@ -0,0 +1,53 @@
+package badgerdatastore
+
+import (
+	"fmt"
+
+	"github.com/google/uuid"
+	"github.com/pikami/cosmium/internal/datastore"
+	"github.com/pikami/cosmium/internal/resourceid"
+)
+
+// I have no idea what this is tbh
+func (r *BadgerDataStore) GetPartitionKeyRanges(databaseId string, collectionId string) ([]datastore.PartitionKeyRange, datastore.DataStoreStatus) {
+	databaseRid := databaseId
+	collectionRid := collectionId
+	var timestamp int64 = 0
+
+	txn := r.db.NewTransaction(false)
+	defer txn.Discard()
+
+	var database datastore.Database
+	status := getKey(txn, generateDatabaseKey(databaseId), &database)
+	if status != datastore.StatusOk {
+		databaseRid = database.ResourceID
+	}
+
+	var collection datastore.Collection
+	status = getKey(txn, generateCollectionKey(databaseId, collectionId), &collection)
+	if status != datastore.StatusOk {
+		collectionRid = collection.ResourceID
+		timestamp = collection.TimeStamp
+	}
+
+	pkrResourceId := resourceid.NewCombined(collectionRid, resourceid.New(resourceid.ResourceTypePartitionKeyRange))
+	pkrSelf := fmt.Sprintf("dbs/%s/colls/%s/pkranges/%s/", databaseRid, collectionRid, pkrResourceId)
+	etag := fmt.Sprintf("\"%s\"", uuid.New())
+
+	return []datastore.PartitionKeyRange{
+		{
+			ResourceID:         pkrResourceId,
+			ID:                 "0",
+			Etag:               etag,
+			MinInclusive:       "",
+			MaxExclusive:       "FF",
+			RidPrefix:          0,
+			Self:               pkrSelf,
+			ThroughputFraction: 1,
+			Status:             "online",
+			Parents:            []interface{}{},
+			TimeStamp:          timestamp,
+			Lsn:                17,
+		},
+	}, datastore.StatusOk
+}

internal/datastore/badger_datastore/stored_procedures.go

@@ -0,0 +1,107 @@
+package badgerdatastore
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/google/uuid"
+	"github.com/pikami/cosmium/internal/datastore"
+	"github.com/pikami/cosmium/internal/logger"
+	"github.com/pikami/cosmium/internal/resourceid"
+)
+
+func (r *BadgerDataStore) GetAllStoredProcedures(databaseId string, collectionId string) ([]datastore.StoredProcedure, datastore.DataStoreStatus) {
+	txn := r.db.NewTransaction(false)
+	defer txn.Discard()
+
+	dbExists, err := keyExists(txn, generateDatabaseKey(databaseId))
+	if err != nil || !dbExists {
+		return nil, datastore.StatusNotFound
+	}
+
+	collExists, err := keyExists(txn, generateCollectionKey(databaseId, collectionId))
+	if err != nil || !collExists {
+		return nil, datastore.StatusNotFound
+	}
+
+	storedProcedures, status := listByPrefix[datastore.StoredProcedure](r.db, generateKey(resourceid.ResourceTypeStoredProcedure, databaseId, collectionId, ""))
+	if status == datastore.StatusOk {
+		return storedProcedures, datastore.StatusOk
+	}
+
+	return nil, status
+}
+
+func (r *BadgerDataStore) GetStoredProcedure(databaseId string, collectionId string, storedProcedureId string) (datastore.StoredProcedure, datastore.DataStoreStatus) {
+	storedProcedureKey := generateStoredProcedureKey(databaseId, collectionId, storedProcedureId)
+
+	txn := r.db.NewTransaction(false)
+	defer txn.Discard()
+
+	var storedProcedure datastore.StoredProcedure
+	status := getKey(txn, storedProcedureKey, &storedProcedure)
+
+	return storedProcedure, status
+}
+
+func (r *BadgerDataStore) DeleteStoredProcedure(databaseId string, collectionId string, storedProcedureId string) datastore.DataStoreStatus {
+	storedProcedureKey := generateStoredProcedureKey(databaseId, collectionId, storedProcedureId)
+
+	txn := r.db.NewTransaction(true)
+	defer txn.Discard()
+
+	exists, err := keyExists(txn, storedProcedureKey)
+	if err != nil {
+		return datastore.Unknown
+	}
+	if !exists {
+		return datastore.StatusNotFound
+	}
+
+	err = txn.Delete([]byte(storedProcedureKey))
+	if err != nil {
+		logger.ErrorLn("Error while deleting stored procedure:", err)
+		return datastore.Unknown
+	}
+
+	err = txn.Commit()
+	if err != nil {
+		logger.ErrorLn("Error while committing transaction:", err)
+		return datastore.Unknown
+	}
+
+	return datastore.StatusOk
+}
+
+func (r *BadgerDataStore) CreateStoredProcedure(databaseId string, collectionId string, storedProcedure datastore.StoredProcedure) (datastore.StoredProcedure, datastore.DataStoreStatus) {
+	txn := r.db.NewTransaction(true)
+	defer txn.Discard()
+
+	if storedProcedure.ID == "" {
+		return datastore.StoredProcedure{}, datastore.BadRequest
+	}
+
+	var database datastore.Database
+	status := getKey(txn, generateDatabaseKey(databaseId), &database)
+	if status != datastore.StatusOk {
+		return datastore.StoredProcedure{}, status
+	}
+
+	var collection datastore.Collection
+	status = getKey(txn, generateCollectionKey(databaseId, collectionId), &collection)
+	if status != datastore.StatusOk {
+		return datastore.StoredProcedure{}, status
+	}
+
+	storedProcedure.TimeStamp = time.Now().Unix()
+	storedProcedure.ResourceID = resourceid.NewCombined(collection.ResourceID, resourceid.New(resourceid.ResourceTypeStoredProcedure))
+	storedProcedure.ETag = fmt.Sprintf("\"%s\"", uuid.New())
+	storedProcedure.Self = fmt.Sprintf("dbs/%s/colls/%s/sprocs/%s/", database.ResourceID, collection.ResourceID, storedProcedure.ResourceID)
+
+	status = insertKey(txn, generateStoredProcedureKey(databaseId, collectionId, storedProcedure.ID), storedProcedure)
+	if status != datastore.StatusOk {
+		return datastore.StoredProcedure{}, status
+	}
+
+	return storedProcedure, datastore.StatusOk
+}

internal/datastore/badger_datastore/triggers.go

@@ -0,0 +1,107 @@
+package badgerdatastore
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/google/uuid"
+	"github.com/pikami/cosmium/internal/datastore"
+	"github.com/pikami/cosmium/internal/logger"
+	"github.com/pikami/cosmium/internal/resourceid"
+)
+
+func (r *BadgerDataStore) GetAllTriggers(databaseId string, collectionId string) ([]datastore.Trigger, datastore.DataStoreStatus) {
+	txn := r.db.NewTransaction(false)
+	defer txn.Discard()
+
+	dbExists, err := keyExists(txn, generateDatabaseKey(databaseId))
+	if err != nil || !dbExists {
+		return nil, datastore.StatusNotFound
+	}
+
+	collExists, err := keyExists(txn, generateCollectionKey(databaseId, collectionId))
+	if err != nil || !collExists {
+		return nil, datastore.StatusNotFound
+	}
+
+	triggers, status := listByPrefix[datastore.Trigger](r.db, generateKey(resourceid.ResourceTypeTrigger, databaseId, collectionId, ""))
+	if status == datastore.StatusOk {
+		return triggers, datastore.StatusOk
+	}
+
+	return nil, status
+}
+
+func (r *BadgerDataStore) GetTrigger(databaseId string, collectionId string, triggerId string) (datastore.Trigger, datastore.DataStoreStatus) {
+	triggerKey := generateTriggerKey(databaseId, collectionId, triggerId)
+
+	txn := r.db.NewTransaction(false)
+	defer txn.Discard()
+
+	var trigger datastore.Trigger
+	status := getKey(txn, triggerKey, &trigger)
+
+	return trigger, status
+}
+
+func (r *BadgerDataStore) DeleteTrigger(databaseId string, collectionId string, triggerId string) datastore.DataStoreStatus {
+	triggerKey := generateTriggerKey(databaseId, collectionId, triggerId)
+
+	txn := r.db.NewTransaction(true)
+	defer txn.Discard()
+
+	exists, err := keyExists(txn, triggerKey)
+	if err != nil {
+		return datastore.Unknown
+	}
+	if !exists {
+		return datastore.StatusNotFound
+	}
+
+	err = txn.Delete([]byte(triggerKey))
+	if err != nil {
+		logger.ErrorLn("Error while deleting trigger:", err)
+		return datastore.Unknown
+	}
+
+	err = txn.Commit()
+	if err != nil {
+		logger.ErrorLn("Error while committing transaction:", err)
+		return datastore.Unknown
+	}
+
+	return datastore.StatusOk
+}
+
+func (r *BadgerDataStore) CreateTrigger(databaseId string, collectionId string, trigger datastore.Trigger) (datastore.Trigger, datastore.DataStoreStatus) {
+	txn := r.db.NewTransaction(true)
+	defer txn.Discard()
+
+	if trigger.ID == "" {
+		return datastore.Trigger{}, datastore.BadRequest
+	}
+
+	var database datastore.Database
+	status := getKey(txn, generateDatabaseKey(databaseId), &database)
+	if status != datastore.StatusOk {
+		return datastore.Trigger{}, status
+	}
+
+	var collection datastore.Collection
+	status = getKey(txn, generateCollectionKey(databaseId, collectionId), &collection)
+	if status != datastore.StatusOk {
+		return datastore.Trigger{}, status
+	}
+
+	trigger.TimeStamp = time.Now().Unix()
+	trigger.ResourceID = resourceid.NewCombined(collection.ResourceID, resourceid.New(resourceid.ResourceTypeTrigger))
+	trigger.ETag = fmt.Sprintf("\"%s\"", uuid.New())
+	trigger.Self = fmt.Sprintf("dbs/%s/colls/%s/triggers/%s/", database.ResourceID, collection.ResourceID, trigger.ResourceID)
+
+	status = insertKey(txn, generateTriggerKey(databaseId, collectionId, trigger.ID), trigger)
+	if status != datastore.StatusOk {
+		return datastore.Trigger{}, status
+	}
+
+	return trigger, datastore.StatusOk
+}

internal/datastore/badger_datastore/user_defined_functions.go

@@ -0,0 +1,107 @@
+package badgerdatastore
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/google/uuid"
+	"github.com/pikami/cosmium/internal/datastore"
+	"github.com/pikami/cosmium/internal/logger"
+	"github.com/pikami/cosmium/internal/resourceid"
+)
+
+func (r *BadgerDataStore) GetAllUserDefinedFunctions(databaseId string, collectionId string) ([]datastore.UserDefinedFunction, datastore.DataStoreStatus) {
+	txn := r.db.NewTransaction(false)
+	defer txn.Discard()
+
+	dbExists, err := keyExists(txn, generateDatabaseKey(databaseId))
+	if err != nil || !dbExists {
+		return nil, datastore.StatusNotFound
+	}
+
+	collExists, err := keyExists(txn, generateCollectionKey(databaseId, collectionId))
+	if err != nil || !collExists {
+		return nil, datastore.StatusNotFound
+	}
+
+	udfs, status := listByPrefix[datastore.UserDefinedFunction](r.db, generateKey(resourceid.ResourceTypeUserDefinedFunction, databaseId, collectionId, ""))
+	if status == datastore.StatusOk {
+		return udfs, datastore.StatusOk
+	}
+
+	return nil, status
+}
+
+func (r *BadgerDataStore) GetUserDefinedFunction(databaseId string, collectionId string, udfId string) (datastore.UserDefinedFunction, datastore.DataStoreStatus) {
+	udfKey := generateUserDefinedFunctionKey(databaseId, collectionId, udfId)
+
+	txn := r.db.NewTransaction(false)
+	defer txn.Discard()
+
+	var udf datastore.UserDefinedFunction
+	status := getKey(txn, udfKey, &udf)
+
+	return udf, status
+}
+
+func (r *BadgerDataStore) DeleteUserDefinedFunction(databaseId string, collectionId string, udfId string) datastore.DataStoreStatus {
+	udfKey := generateUserDefinedFunctionKey(databaseId, collectionId, udfId)
+
+	txn := r.db.NewTransaction(true)
+	defer txn.Discard()
+
+	exists, err := keyExists(txn, udfKey)
+	if err != nil {
+		return datastore.Unknown
+	}
+	if !exists {
+		return datastore.StatusNotFound
+	}
+
+	err = txn.Delete([]byte(udfKey))
+	if err != nil {
+		logger.ErrorLn("Error while deleting user defined function:", err)
+		return datastore.Unknown
+	}
+
+	err = txn.Commit()
+	if err != nil {
+		logger.ErrorLn("Error while committing transaction:", err)
+		return datastore.Unknown
+	}
+
+	return datastore.StatusOk
+}
+
+func (r *BadgerDataStore) CreateUserDefinedFunction(databaseId string, collectionId string, udf datastore.UserDefinedFunction) (datastore.UserDefinedFunction, datastore.DataStoreStatus) {
+	txn := r.db.NewTransaction(true)
+	defer txn.Discard()
+
+	if udf.ID == "" {
+		return datastore.UserDefinedFunction{}, datastore.BadRequest
+	}
+
+	var database datastore.Database
+	status := getKey(txn, generateDatabaseKey(databaseId), &database)
+	if status != datastore.StatusOk {
+		return datastore.UserDefinedFunction{}, status
+	}
+
+	var collection datastore.Collection
+	status = getKey(txn, generateCollectionKey(databaseId, collectionId), &collection)
+	if status != datastore.StatusOk {
+		return datastore.UserDefinedFunction{}, status
+	}
+
+	udf.TimeStamp = time.Now().Unix()
+	udf.ResourceID = resourceid.NewCombined(collection.ResourceID, resourceid.New(resourceid.ResourceTypeUserDefinedFunction))
+	udf.ETag = fmt.Sprintf("\"%s\"", uuid.New())
+	udf.Self = fmt.Sprintf("dbs/%s/colls/%s/udfs/%s/", database.ResourceID, collection.ResourceID, udf.ResourceID)
+
+	status = insertKey(txn, generateUserDefinedFunctionKey(databaseId, collectionId, udf.ID), udf)
+	if status != datastore.StatusOk {
+		return datastore.UserDefinedFunction{}, status
+	}
+
+	return udf, datastore.StatusOk
+}

internal/datastore/datastore.go

@@ -0,0 +1,44 @@
+package datastore
+
+type DataStore interface {
+	GetAllDatabases() ([]Database, DataStoreStatus)
+	GetDatabase(databaseId string) (Database, DataStoreStatus)
+	DeleteDatabase(databaseId string) DataStoreStatus
+	CreateDatabase(newDatabase Database) (Database, DataStoreStatus)
+
+	GetAllCollections(databaseId string) ([]Collection, DataStoreStatus)
+	GetCollection(databaseId string, collectionId string) (Collection, DataStoreStatus)
+	DeleteCollection(databaseId string, collectionId string) DataStoreStatus
+	CreateCollection(databaseId string, newCollection Collection) (Collection, DataStoreStatus)
+
+	GetAllDocuments(databaseId string, collectionId string) ([]Document, DataStoreStatus)
+	GetDocumentIterator(databaseId string, collectionId string) (DocumentIterator, DataStoreStatus)
+	GetDocument(databaseId string, collectionId string, documentId string) (Document, DataStoreStatus)
+	DeleteDocument(databaseId string, collectionId string, documentId string) DataStoreStatus
+	CreateDocument(databaseId string, collectionId string, document map[string]interface{}) (Document, DataStoreStatus)
+
+	GetAllTriggers(databaseId string, collectionId string) ([]Trigger, DataStoreStatus)
+	GetTrigger(databaseId string, collectionId string, triggerId string) (Trigger, DataStoreStatus)
+	DeleteTrigger(databaseId string, collectionId string, triggerId string) DataStoreStatus
+	CreateTrigger(databaseId string, collectionId string, trigger Trigger) (Trigger, DataStoreStatus)
+
+	GetAllStoredProcedures(databaseId string, collectionId string) ([]StoredProcedure, DataStoreStatus)
+	GetStoredProcedure(databaseId string, collectionId string, storedProcedureId string) (StoredProcedure, DataStoreStatus)
+	DeleteStoredProcedure(databaseId string, collectionId string, storedProcedureId string) DataStoreStatus
+	CreateStoredProcedure(databaseId string, collectionId string, storedProcedure StoredProcedure) (StoredProcedure, DataStoreStatus)
+
+	GetAllUserDefinedFunctions(databaseId string, collectionId string) ([]UserDefinedFunction, DataStoreStatus)
+	GetUserDefinedFunction(databaseId string, collectionId string, udfId string) (UserDefinedFunction, DataStoreStatus)
+	DeleteUserDefinedFunction(databaseId string, collectionId string, udfId string) DataStoreStatus
+	CreateUserDefinedFunction(databaseId string, collectionId string, udf UserDefinedFunction) (UserDefinedFunction, DataStoreStatus)
+
+	GetPartitionKeyRanges(databaseId string, collectionId string) ([]PartitionKeyRange, DataStoreStatus)
+
+	Close()
+	DumpToJson() (string, error)
+}
+
+type DocumentIterator interface {
+	Next() (Document, DataStoreStatus)
+	Close()
+}

internal/datastore/json_datastore/array_document_iterator.go

@@ -0,0 +1,21 @@
+package jsondatastore
+
+import "github.com/pikami/cosmium/internal/datastore"
+
+type ArrayDocumentIterator struct {
+	documents []datastore.Document
+	index     int
+}
+
+func (i *ArrayDocumentIterator) Next() (datastore.Document, datastore.DataStoreStatus) {
+	i.index++
+	if i.index >= len(i.documents) {
+		return datastore.Document{}, datastore.StatusNotFound
+	}
+
+	return i.documents[i.index], datastore.StatusOk
+}
+
+func (i *ArrayDocumentIterator) Close() {
+	i.documents = []datastore.Document{}
+}

internal/datastore/json_datastore/collections.go

@@ -0,0 +1,89 @@
+package jsondatastore
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/google/uuid"
+	"github.com/pikami/cosmium/internal/datastore"
+	"github.com/pikami/cosmium/internal/resourceid"
+	structhidrators "github.com/pikami/cosmium/internal/struct_hidrators"
+	"golang.org/x/exp/maps"
+)
+
+func (r *JsonDataStore) GetAllCollections(databaseId string) ([]datastore.Collection, datastore.DataStoreStatus) {
+	r.storeState.RLock()
+	defer r.storeState.RUnlock()
+
+	if _, ok := r.storeState.Databases[databaseId]; !ok {
+		return make([]datastore.Collection, 0), datastore.StatusNotFound
+	}
+
+	return maps.Values(r.storeState.Collections[databaseId]), datastore.StatusOk
+}
+
+func (r *JsonDataStore) GetCollection(databaseId string, collectionId string) (datastore.Collection, datastore.DataStoreStatus) {
+	r.storeState.RLock()
+	defer r.storeState.RUnlock()
+
+	if _, ok := r.storeState.Databases[databaseId]; !ok {
+		return datastore.Collection{}, datastore.StatusNotFound
+	}
+
+	if _, ok := r.storeState.Collections[databaseId][collectionId]; !ok {
+		return datastore.Collection{}, datastore.StatusNotFound
+	}
+
+	return r.storeState.Collections[databaseId][collectionId], datastore.StatusOk
+}
+
+func (r *JsonDataStore) DeleteCollection(databaseId string, collectionId string) datastore.DataStoreStatus {
+	r.storeState.Lock()
+	defer r.storeState.Unlock()
+
+	if _, ok := r.storeState.Databases[databaseId]; !ok {
+		return datastore.StatusNotFound
+	}
+
+	if _, ok := r.storeState.Collections[databaseId][collectionId]; !ok {
+		return datastore.StatusNotFound
+	}
+
+	delete(r.storeState.Collections[databaseId], collectionId)
+	delete(r.storeState.Documents[databaseId], collectionId)
+	delete(r.storeState.Triggers[databaseId], collectionId)
+	delete(r.storeState.StoredProcedures[databaseId], collectionId)
+	delete(r.storeState.UserDefinedFunctions[databaseId], collectionId)
+
+	return datastore.StatusOk
+}
+
+func (r *JsonDataStore) CreateCollection(databaseId string, newCollection datastore.Collection) (datastore.Collection, datastore.DataStoreStatus) {
+	r.storeState.Lock()
+	defer r.storeState.Unlock()
+
+	var ok bool
+	var database datastore.Database
+	if database, ok = r.storeState.Databases[databaseId]; !ok {
+		return datastore.Collection{}, datastore.StatusNotFound
+	}
+
+	if _, ok = r.storeState.Collections[databaseId][newCollection.ID]; ok {
+		return datastore.Collection{}, datastore.Conflict
+	}
+
+	newCollection = structhidrators.Hidrate(newCollection).(datastore.Collection)
+
+	newCollection.TimeStamp = time.Now().Unix()
+	newCollection.ResourceID = resourceid.NewCombined(database.ResourceID, resourceid.New(resourceid.ResourceTypeCollection))
+	newCollection.ETag = fmt.Sprintf("\"%s\"", uuid.New())
+	newCollection.Self = fmt.Sprintf("dbs/%s/colls/%s/", database.ResourceID, newCollection.ResourceID)
+
+	r.storeState.Collections[databaseId][newCollection.ID] = newCollection
+	r.storeState.Documents[databaseId][newCollection.ID] = make(map[string]datastore.Document)
+	r.storeState.Triggers[databaseId][newCollection.ID] = make(map[string]datastore.Trigger)
+	r.storeState.StoredProcedures[databaseId][newCollection.ID] = make(map[string]datastore.StoredProcedure)
+	r.storeState.UserDefinedFunctions[databaseId][newCollection.ID] = make(map[string]datastore.UserDefinedFunction)
+
+	return newCollection, datastore.StatusOk
+}

internal/datastore/json_datastore/databases.go

@@ -0,0 +1,70 @@
+package jsondatastore
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/google/uuid"
+	"github.com/pikami/cosmium/internal/datastore"
+	"github.com/pikami/cosmium/internal/resourceid"
+	"golang.org/x/exp/maps"
+)
+
+func (r *JsonDataStore) GetAllDatabases() ([]datastore.Database, datastore.DataStoreStatus) {
+	r.storeState.RLock()
+	defer r.storeState.RUnlock()
+
+	return maps.Values(r.storeState.Databases), datastore.StatusOk
+}
+
+func (r *JsonDataStore) GetDatabase(id string) (datastore.Database, datastore.DataStoreStatus) {
+	r.storeState.RLock()
+	defer r.storeState.RUnlock()
+
+	if database, ok := r.storeState.Databases[id]; ok {
+		return database, datastore.StatusOk
+	}
+
+	return datastore.Database{}, datastore.StatusNotFound
+}
+
+func (r *JsonDataStore) DeleteDatabase(id string) datastore.DataStoreStatus {
+	r.storeState.Lock()
+	defer r.storeState.Unlock()
+
+	if _, ok := r.storeState.Databases[id]; !ok {
+		return datastore.StatusNotFound
+	}
+
+	delete(r.storeState.Databases, id)
+	delete(r.storeState.Collections, id)
+	delete(r.storeState.Documents, id)
+	delete(r.storeState.Triggers, id)
+	delete(r.storeState.StoredProcedures, id)
+	delete(r.storeState.UserDefinedFunctions, id)
+
+	return datastore.StatusOk
+}
+
+func (r *JsonDataStore) CreateDatabase(newDatabase datastore.Database) (datastore.Database, datastore.DataStoreStatus) {
+	r.storeState.Lock()
+	defer r.storeState.Unlock()
+
+	if _, ok := r.storeState.Databases[newDatabase.ID]; ok {
+		return datastore.Database{}, datastore.Conflict
+	}
+
+	newDatabase.TimeStamp = time.Now().Unix()
+	newDatabase.ResourceID = resourceid.New(resourceid.ResourceTypeDatabase)
+	newDatabase.ETag = fmt.Sprintf("\"%s\"", uuid.New())
+	newDatabase.Self = fmt.Sprintf("dbs/%s/", newDatabase.ResourceID)
+
+	r.storeState.Databases[newDatabase.ID] = newDatabase
+	r.storeState.Collections[newDatabase.ID] = make(map[string]datastore.Collection)
+	r.storeState.Documents[newDatabase.ID] = make(map[string]map[string]datastore.Document)
+	r.storeState.Triggers[newDatabase.ID] = make(map[string]map[string]datastore.Trigger)
+	r.storeState.StoredProcedures[newDatabase.ID] = make(map[string]map[string]datastore.StoredProcedure)
+	r.storeState.UserDefinedFunctions[newDatabase.ID] = make(map[string]map[string]datastore.UserDefinedFunction)
+
+	return newDatabase, datastore.StatusOk
+}

internal/datastore/json_datastore/documents.go

@@ -0,0 +1,113 @@
+package jsondatastore
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/google/uuid"
+	"github.com/pikami/cosmium/internal/datastore"
+	"github.com/pikami/cosmium/internal/resourceid"
+	"golang.org/x/exp/maps"
+)
+
+func (r *JsonDataStore) GetAllDocuments(databaseId string, collectionId string) ([]datastore.Document, datastore.DataStoreStatus) {
+	r.storeState.RLock()
+	defer r.storeState.RUnlock()
+
+	if _, ok := r.storeState.Databases[databaseId]; !ok {
+		return make([]datastore.Document, 0), datastore.StatusNotFound
+	}
+
+	if _, ok := r.storeState.Collections[databaseId][collectionId]; !ok {
+		return make([]datastore.Document, 0), datastore.StatusNotFound
+	}
+
+	return maps.Values(r.storeState.Documents[databaseId][collectionId]), datastore.StatusOk
+}
+
+func (r *JsonDataStore) GetDocument(databaseId string, collectionId string, documentId string) (datastore.Document, datastore.DataStoreStatus) {
+	r.storeState.RLock()
+	defer r.storeState.RUnlock()
+
+	if _, ok := r.storeState.Databases[databaseId]; !ok {
+		return datastore.Document{}, datastore.StatusNotFound
+	}
+
+	if _, ok := r.storeState.Collections[databaseId][collectionId]; !ok {
+		return datastore.Document{}, datastore.StatusNotFound
+	}
+
+	if _, ok := r.storeState.Documents[databaseId][collectionId][documentId]; !ok {
+		return datastore.Document{}, datastore.StatusNotFound
+	}
+
+	return r.storeState.Documents[databaseId][collectionId][documentId], datastore.StatusOk
+}
+
+func (r *JsonDataStore) DeleteDocument(databaseId string, collectionId string, documentId string) datastore.DataStoreStatus {
+	r.storeState.Lock()
+	defer r.storeState.Unlock()
+
+	if _, ok := r.storeState.Databases[databaseId]; !ok {
+		return datastore.StatusNotFound
+	}
+
+	if _, ok := r.storeState.Collections[databaseId][collectionId]; !ok {
+		return datastore.StatusNotFound
+	}
+
+	if _, ok := r.storeState.Documents[databaseId][collectionId][documentId]; !ok {
+		return datastore.StatusNotFound
+	}
+
+	delete(r.storeState.Documents[databaseId][collectionId], documentId)
+
+	return datastore.StatusOk
+}
+
+func (r *JsonDataStore) CreateDocument(databaseId string, collectionId string, document map[string]interface{}) (datastore.Document, datastore.DataStoreStatus) {
+	r.storeState.Lock()
+	defer r.storeState.Unlock()
+
+	var ok bool
+	var documentId string
+	var database datastore.Database
+	var collection datastore.Collection
+	if documentId, ok = document["id"].(string); !ok || documentId == "" {
+		documentId = fmt.Sprint(uuid.New())
+		document["id"] = documentId
+	}
+
+	if database, ok = r.storeState.Databases[databaseId]; !ok {
+		return datastore.Document{}, datastore.StatusNotFound
+	}
+
+	if collection, ok = r.storeState.Collections[databaseId][collectionId]; !ok {
+		return datastore.Document{}, datastore.StatusNotFound
+	}
+
+	if _, ok := r.storeState.Documents[databaseId][collectionId][documentId]; ok {
+		return datastore.Document{}, datastore.Conflict
+	}
+
+	document["_ts"] = time.Now().Unix()
+	document["_rid"] = resourceid.NewCombined(collection.ResourceID, resourceid.New(resourceid.ResourceTypeDocument))
+	document["_etag"] = fmt.Sprintf("\"%s\"", uuid.New())
+	document["_self"] = fmt.Sprintf("dbs/%s/colls/%s/docs/%s/", database.ResourceID, collection.ResourceID, document["_rid"])
+
+	r.storeState.Documents[databaseId][collectionId][documentId] = document
+
+	return document, datastore.StatusOk
+}
+
+func (r *JsonDataStore) GetDocumentIterator(databaseId string, collectionId string) (datastore.DocumentIterator, datastore.DataStoreStatus) {
+	documents, status := r.GetAllDocuments(databaseId, collectionId)
+	if status != datastore.StatusOk {
+		return nil, status
+	}
+
+	return &ArrayDocumentIterator{
+		documents: documents,
+		index:     -1,
+	}, datastore.StatusOk
+}

internal/datastore/json_datastore/map_datastore.go

@@ -0,0 +1,34 @@
+package jsondatastore
+
+import "github.com/pikami/cosmium/internal/datastore"
+
+type JsonDataStore struct {
+	storeState State
+
+	initialDataFilePath string
+	persistDataFilePath string
+}
+
+type JsonDataStoreOptions struct {
+	InitialDataFilePath string
+	PersistDataFilePath string
+}
+
+func NewJsonDataStore(options JsonDataStoreOptions) *JsonDataStore {
+	dataStore := &JsonDataStore{
+		storeState: State{
+			Databases:            make(map[string]datastore.Database),
+			Collections:          make(map[string]map[string]datastore.Collection),
+			Documents:            make(map[string]map[string]map[string]datastore.Document),
+			Triggers:             make(map[string]map[string]map[string]datastore.Trigger),
+			StoredProcedures:     make(map[string]map[string]map[string]datastore.StoredProcedure),
+			UserDefinedFunctions: make(map[string]map[string]map[string]datastore.UserDefinedFunction),
+		},
+		initialDataFilePath: options.InitialDataFilePath,
+		persistDataFilePath: options.PersistDataFilePath,
+	}
+
+	dataStore.InitializeDataStore()
+
+	return dataStore
+}

internal/datastore/json_datastore/partition_key_ranges.go

@@ -1,36 +1,36 @@
-package repositories
+package jsondatastore
 
 import (
 	"fmt"
 
 	"github.com/google/uuid"
-	repositorymodels "github.com/pikami/cosmium/internal/repository_models"
+	"github.com/pikami/cosmium/internal/datastore"
 	"github.com/pikami/cosmium/internal/resourceid"
 )
 
 // I have no idea what this is tbh
-func GetPartitionKeyRanges(databaseId string, collectionId string) ([]repositorymodels.PartitionKeyRange, repositorymodels.RepositoryStatus) {
+func (r *JsonDataStore) GetPartitionKeyRanges(databaseId string, collectionId string) ([]datastore.PartitionKeyRange, datastore.DataStoreStatus) {
-	storeState.RLock()
+	r.storeState.RLock()
-	defer storeState.RUnlock()
+	defer r.storeState.RUnlock()
 
 	databaseRid := databaseId
 	collectionRid := collectionId
 	var timestamp int64 = 0
 
-	if database, ok := storeState.Databases[databaseId]; !ok {
+	if database, ok := r.storeState.Databases[databaseId]; !ok {
 		databaseRid = database.ResourceID
 	}
 
-	if collection, ok := storeState.Collections[databaseId][collectionId]; !ok {
+	if collection, ok := r.storeState.Collections[databaseId][collectionId]; !ok {
 		collectionRid = collection.ResourceID
 		timestamp = collection.TimeStamp
 	}
 
-	pkrResourceId := resourceid.NewCombined(databaseRid, collectionRid, resourceid.New())
+	pkrResourceId := resourceid.NewCombined(collectionRid, resourceid.New(resourceid.ResourceTypePartitionKeyRange))
 	pkrSelf := fmt.Sprintf("dbs/%s/colls/%s/pkranges/%s/", databaseRid, collectionRid, pkrResourceId)
 	etag := fmt.Sprintf("\"%s\"", uuid.New())
 
-	return []repositorymodels.PartitionKeyRange{
+	return []datastore.PartitionKeyRange{
 		{
 			ResourceID:         pkrResourceId,
 			ID:                 "0",
@@ -45,5 +45,5 @@ func GetPartitionKeyRanges(databaseId string, collectionId string) ([]repository
 			TimeStamp:          timestamp,
 			Lsn:                17,
 		},
-	}, repositorymodels.StatusOk
+	}, datastore.StatusOk
 }

internal/datastore/json_datastore/state.go

@@ -0,0 +1,236 @@
+package jsondatastore
+
+import (
+	"encoding/json"
+	"log"
+	"os"
+	"reflect"
+	"sync"
+
+	"github.com/pikami/cosmium/internal/datastore"
+	"github.com/pikami/cosmium/internal/logger"
+)
+
+type State struct {
+	sync.RWMutex
+
+	// Map databaseId -> Database
+	Databases map[string]datastore.Database `json:"databases"`
+
+	// Map databaseId -> collectionId -> Collection
+	Collections map[string]map[string]datastore.Collection `json:"collections"`
+
+	// Map databaseId -> collectionId -> documentId -> Documents
+	Documents map[string]map[string]map[string]datastore.Document `json:"documents"`
+
+	// Map databaseId -> collectionId -> triggerId -> Trigger
+	Triggers map[string]map[string]map[string]datastore.Trigger `json:"triggers"`
+
+	// Map databaseId -> collectionId -> spId -> StoredProcedure
+	StoredProcedures map[string]map[string]map[string]datastore.StoredProcedure `json:"sprocs"`
+
+	// Map databaseId -> collectionId -> udfId -> UserDefinedFunction
+	UserDefinedFunctions map[string]map[string]map[string]datastore.UserDefinedFunction `json:"udfs"`
+}
+
+func (r *JsonDataStore) InitializeDataStore() {
+	if r.initialDataFilePath != "" {
+		r.LoadStateFS(r.initialDataFilePath)
+		return
+	}
+
+	if r.persistDataFilePath != "" {
+		stat, err := os.Stat(r.persistDataFilePath)
+		if err != nil {
+			return
+		}
+
+		if stat.IsDir() {
+			logger.ErrorLn("Argument '-Persist' must be a path to file, not a directory.")
+			os.Exit(1)
+		}
+
+		r.LoadStateFS(r.persistDataFilePath)
+		return
+	}
+}
+
+func (r *JsonDataStore) LoadStateFS(filePath string) {
+	data, err := os.ReadFile(filePath)
+	if err != nil {
+		log.Fatalf("Error reading state JSON file: %v", err)
+		return
+	}
+
+	err = r.LoadStateJSON(string(data))
+	if err != nil {
+		log.Fatalf("Error unmarshalling state JSON: %v", err)
+	}
+}
+
+func (r *JsonDataStore) LoadStateJSON(jsonData string) error {
+	r.storeState.Lock()
+	defer r.storeState.Unlock()
+
+	var state State
+	if err := json.Unmarshal([]byte(jsonData), &state); err != nil {
+		return err
+	}
+
+	r.storeState.Collections = state.Collections
+	r.storeState.Databases = state.Databases
+	r.storeState.Documents = state.Documents
+
+	r.ensureStoreStateNoNullReferences()
+
+	logger.InfoLn("Loaded state:")
+	logger.Infof("Databases: %d\n", getLength(r.storeState.Databases))
+	logger.Infof("Collections: %d\n", getLength(r.storeState.Collections))
+	logger.Infof("Documents: %d\n", getLength(r.storeState.Documents))
+	logger.Infof("Triggers: %d\n", getLength(r.storeState.Triggers))
+	logger.Infof("Stored procedures: %d\n", getLength(r.storeState.StoredProcedures))
+	logger.Infof("User defined functions: %d\n", getLength(r.storeState.UserDefinedFunctions))
+
+	return nil
+}
+
+func (r *JsonDataStore) SaveStateFS(filePath string) {
+	r.storeState.RLock()
+	defer r.storeState.RUnlock()
+
+	data, err := json.MarshalIndent(r.storeState, "", "\t")
+	if err != nil {
+		logger.Errorf("Failed to save state: %v\n", err)
+		return
+	}
+
+	os.WriteFile(filePath, data, os.ModePerm)
+
+	logger.InfoLn("Saved state:")
+	logger.Infof("Databases: %d\n", getLength(r.storeState.Databases))
+	logger.Infof("Collections: %d\n", getLength(r.storeState.Collections))
+	logger.Infof("Documents: %d\n", getLength(r.storeState.Documents))
+	logger.Infof("Triggers: %d\n", getLength(r.storeState.Triggers))
+	logger.Infof("Stored procedures: %d\n", getLength(r.storeState.StoredProcedures))
+	logger.Infof("User defined functions: %d\n", getLength(r.storeState.UserDefinedFunctions))
+}
+
+func (r *JsonDataStore) DumpToJson() (string, error) {
+	r.storeState.RLock()
+	defer r.storeState.RUnlock()
+
+	data, err := json.MarshalIndent(r.storeState, "", "\t")
+	if err != nil {
+		logger.Errorf("Failed to serialize state: %v\n", err)
+		return "", err
+	}
+
+	return string(data), nil
+
+}
+
+func (r *JsonDataStore) Close() {
+	if r.persistDataFilePath != "" {
+		r.SaveStateFS(r.persistDataFilePath)
+	}
+}
+
+func getLength(v interface{}) int {
+	switch v.(type) {
+	case datastore.Database,
+		datastore.Collection,
+		datastore.Document,
+		datastore.Trigger,
+		datastore.StoredProcedure,
+		datastore.UserDefinedFunction:
+		return 1
+	}
+
+	rv := reflect.ValueOf(v)
+	if rv.Kind() != reflect.Map {
+		return -1
+	}
+
+	count := 0
+	for _, key := range rv.MapKeys() {
+		if rv.MapIndex(key).Kind() == reflect.Map {
+			count += getLength(rv.MapIndex(key).Interface())
+		} else {
+			count++
+		}
+	}
+
+	return count
+}
+
+func (r *JsonDataStore) ensureStoreStateNoNullReferences() {
+	if r.storeState.Databases == nil {
+		r.storeState.Databases = make(map[string]datastore.Database)
+	}
+
+	if r.storeState.Collections == nil {
+		r.storeState.Collections = make(map[string]map[string]datastore.Collection)
+	}
+
+	if r.storeState.Documents == nil {
+		r.storeState.Documents = make(map[string]map[string]map[string]datastore.Document)
+	}
+
+	if r.storeState.Triggers == nil {
+		r.storeState.Triggers = make(map[string]map[string]map[string]datastore.Trigger)
+	}
+
+	if r.storeState.StoredProcedures == nil {
+		r.storeState.StoredProcedures = make(map[string]map[string]map[string]datastore.StoredProcedure)
+	}
+
+	if r.storeState.UserDefinedFunctions == nil {
+		r.storeState.UserDefinedFunctions = make(map[string]map[string]map[string]datastore.UserDefinedFunction)
+	}
+
+	for database := range r.storeState.Databases {
+		if r.storeState.Collections[database] == nil {
+			r.storeState.Collections[database] = make(map[string]datastore.Collection)
+		}
+
+		if r.storeState.Documents[database] == nil {
+			r.storeState.Documents[database] = make(map[string]map[string]datastore.Document)
+		}
+
+		if r.storeState.Triggers[database] == nil {
+			r.storeState.Triggers[database] = make(map[string]map[string]datastore.Trigger)
+		}
+
+		if r.storeState.StoredProcedures[database] == nil {
+			r.storeState.StoredProcedures[database] = make(map[string]map[string]datastore.StoredProcedure)
+		}
+
+		if r.storeState.UserDefinedFunctions[database] == nil {
+			r.storeState.UserDefinedFunctions[database] = make(map[string]map[string]datastore.UserDefinedFunction)
+		}
+
+		for collection := range r.storeState.Collections[database] {
+			if r.storeState.Documents[database][collection] == nil {
+				r.storeState.Documents[database][collection] = make(map[string]datastore.Document)
+			}
+
+			for document := range r.storeState.Documents[database][collection] {
+				if r.storeState.Documents[database][collection][document] == nil {
+					delete(r.storeState.Documents[database][collection], document)
+				}
+			}
+
+			if r.storeState.Triggers[database][collection] == nil {
+				r.storeState.Triggers[database][collection] = make(map[string]datastore.Trigger)
+			}
+
+			if r.storeState.StoredProcedures[database][collection] == nil {
+				r.storeState.StoredProcedures[database][collection] = make(map[string]datastore.StoredProcedure)
+			}
+
+			if r.storeState.UserDefinedFunctions[database][collection] == nil {
+				r.storeState.UserDefinedFunctions[database][collection] = make(map[string]datastore.UserDefinedFunction)
+			}
+		}
+	}
+}

internal/datastore/json_datastore/stored_procedures.go

@@ -0,0 +1,91 @@
+package jsondatastore
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/google/uuid"
+	"github.com/pikami/cosmium/internal/datastore"
+	"github.com/pikami/cosmium/internal/resourceid"
+	"golang.org/x/exp/maps"
+)
+
+func (r *JsonDataStore) GetAllStoredProcedures(databaseId string, collectionId string) ([]datastore.StoredProcedure, datastore.DataStoreStatus) {
+	r.storeState.RLock()
+	defer r.storeState.RUnlock()
+
+	return maps.Values(r.storeState.StoredProcedures[databaseId][collectionId]), datastore.StatusOk
+}
+
+func (r *JsonDataStore) GetStoredProcedure(databaseId string, collectionId string, spId string) (datastore.StoredProcedure, datastore.DataStoreStatus) {
+	r.storeState.RLock()
+	defer r.storeState.RUnlock()
+
+	if _, ok := r.storeState.Databases[databaseId]; !ok {
+		return datastore.StoredProcedure{}, datastore.StatusNotFound
+	}
+
+	if _, ok := r.storeState.Collections[databaseId][collectionId]; !ok {
+		return datastore.StoredProcedure{}, datastore.StatusNotFound
+	}
+
+	if sp, ok := r.storeState.StoredProcedures[databaseId][collectionId][spId]; ok {
+		return sp, datastore.StatusOk
+	}
+
+	return datastore.StoredProcedure{}, datastore.StatusNotFound
+}
+
+func (r *JsonDataStore) DeleteStoredProcedure(databaseId string, collectionId string, spId string) datastore.DataStoreStatus {
+	r.storeState.Lock()
+	defer r.storeState.Unlock()
+
+	if _, ok := r.storeState.Databases[databaseId]; !ok {
+		return datastore.StatusNotFound
+	}
+
+	if _, ok := r.storeState.Collections[databaseId][collectionId]; !ok {
+		return datastore.StatusNotFound
+	}
+
+	if _, ok := r.storeState.StoredProcedures[databaseId][collectionId][spId]; !ok {
+		return datastore.StatusNotFound
+	}
+
+	delete(r.storeState.StoredProcedures[databaseId][collectionId], spId)
+
+	return datastore.StatusOk
+}
+
+func (r *JsonDataStore) CreateStoredProcedure(databaseId string, collectionId string, sp datastore.StoredProcedure) (datastore.StoredProcedure, datastore.DataStoreStatus) {
+	r.storeState.Lock()
+	defer r.storeState.Unlock()
+
+	var ok bool
+	var database datastore.Database
+	var collection datastore.Collection
+	if sp.ID == "" {
+		return datastore.StoredProcedure{}, datastore.BadRequest
+	}
+
+	if database, ok = r.storeState.Databases[databaseId]; !ok {
+		return datastore.StoredProcedure{}, datastore.StatusNotFound
+	}
+
+	if collection, ok = r.storeState.Collections[databaseId][collectionId]; !ok {
+		return datastore.StoredProcedure{}, datastore.StatusNotFound
+	}
+
+	if _, ok = r.storeState.StoredProcedures[databaseId][collectionId][sp.ID]; ok {
+		return datastore.StoredProcedure{}, datastore.Conflict
+	}
+
+	sp.TimeStamp = time.Now().Unix()
+	sp.ResourceID = resourceid.NewCombined(collection.ResourceID, resourceid.New(resourceid.ResourceTypeStoredProcedure))
+	sp.ETag = fmt.Sprintf("\"%s\"", uuid.New())
+	sp.Self = fmt.Sprintf("dbs/%s/colls/%s/sprocs/%s/", database.ResourceID, collection.ResourceID, sp.ResourceID)
+
+	r.storeState.StoredProcedures[databaseId][collectionId][sp.ID] = sp
+
+	return sp, datastore.StatusOk
+}

internal/datastore/json_datastore/triggers.go

@@ -0,0 +1,91 @@
+package jsondatastore
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/google/uuid"
+	"github.com/pikami/cosmium/internal/datastore"
+	"github.com/pikami/cosmium/internal/resourceid"
+	"golang.org/x/exp/maps"
+)
+
+func (r *JsonDataStore) GetAllTriggers(databaseId string, collectionId string) ([]datastore.Trigger, datastore.DataStoreStatus) {
+	r.storeState.RLock()
+	defer r.storeState.RUnlock()
+
+	return maps.Values(r.storeState.Triggers[databaseId][collectionId]), datastore.StatusOk
+}
+
+func (r *JsonDataStore) GetTrigger(databaseId string, collectionId string, triggerId string) (datastore.Trigger, datastore.DataStoreStatus) {
+	r.storeState.RLock()
+	defer r.storeState.RUnlock()
+
+	if _, ok := r.storeState.Databases[databaseId]; !ok {
+		return datastore.Trigger{}, datastore.StatusNotFound
+	}
+
+	if _, ok := r.storeState.Collections[databaseId][collectionId]; !ok {
+		return datastore.Trigger{}, datastore.StatusNotFound
+	}
+
+	if trigger, ok := r.storeState.Triggers[databaseId][collectionId][triggerId]; ok {
+		return trigger, datastore.StatusOk
+	}
+
+	return datastore.Trigger{}, datastore.StatusNotFound
+}
+
+func (r *JsonDataStore) DeleteTrigger(databaseId string, collectionId string, triggerId string) datastore.DataStoreStatus {
+	r.storeState.Lock()
+	defer r.storeState.Unlock()
+
+	if _, ok := r.storeState.Databases[databaseId]; !ok {
+		return datastore.StatusNotFound
+	}
+
+	if _, ok := r.storeState.Collections[databaseId][collectionId]; !ok {
+		return datastore.StatusNotFound
+	}
+
+	if _, ok := r.storeState.Triggers[databaseId][collectionId][triggerId]; !ok {
+		return datastore.StatusNotFound
+	}
+
+	delete(r.storeState.Triggers[databaseId][collectionId], triggerId)
+
+	return datastore.StatusOk
+}
+
+func (r *JsonDataStore) CreateTrigger(databaseId string, collectionId string, trigger datastore.Trigger) (datastore.Trigger, datastore.DataStoreStatus) {
+	r.storeState.Lock()
+	defer r.storeState.Unlock()
+
+	var ok bool
+	var database datastore.Database
+	var collection datastore.Collection
+	if trigger.ID == "" {
+		return datastore.Trigger{}, datastore.BadRequest
+	}
+
+	if database, ok = r.storeState.Databases[databaseId]; !ok {
+		return datastore.Trigger{}, datastore.StatusNotFound
+	}
+
+	if collection, ok = r.storeState.Collections[databaseId][collectionId]; !ok {
+		return datastore.Trigger{}, datastore.StatusNotFound
+	}
+
+	if _, ok = r.storeState.Triggers[databaseId][collectionId][trigger.ID]; ok {
+		return datastore.Trigger{}, datastore.Conflict
+	}
+
+	trigger.TimeStamp = time.Now().Unix()
+	trigger.ResourceID = resourceid.NewCombined(collection.ResourceID, resourceid.New(resourceid.ResourceTypeTrigger))
+	trigger.ETag = fmt.Sprintf("\"%s\"", uuid.New())
+	trigger.Self = fmt.Sprintf("dbs/%s/colls/%s/triggers/%s/", database.ResourceID, collection.ResourceID, trigger.ResourceID)
+
+	r.storeState.Triggers[databaseId][collectionId][trigger.ID] = trigger
+
+	return trigger, datastore.StatusOk
+}

internal/datastore/json_datastore/user_defined_functions.go

@@ -0,0 +1,91 @@
+package jsondatastore
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/google/uuid"
+	"github.com/pikami/cosmium/internal/datastore"
+	"github.com/pikami/cosmium/internal/resourceid"
+	"golang.org/x/exp/maps"
+)
+
+func (r *JsonDataStore) GetAllUserDefinedFunctions(databaseId string, collectionId string) ([]datastore.UserDefinedFunction, datastore.DataStoreStatus) {
+	r.storeState.RLock()
+	defer r.storeState.RUnlock()
+
+	return maps.Values(r.storeState.UserDefinedFunctions[databaseId][collectionId]), datastore.StatusOk
+}
+
+func (r *JsonDataStore) GetUserDefinedFunction(databaseId string, collectionId string, udfId string) (datastore.UserDefinedFunction, datastore.DataStoreStatus) {
+	r.storeState.RLock()
+	defer r.storeState.RUnlock()
+
+	if _, ok := r.storeState.Databases[databaseId]; !ok {
+		return datastore.UserDefinedFunction{}, datastore.StatusNotFound
+	}
+
+	if _, ok := r.storeState.Collections[databaseId][collectionId]; !ok {
+		return datastore.UserDefinedFunction{}, datastore.StatusNotFound
+	}
+
+	if udf, ok := r.storeState.UserDefinedFunctions[databaseId][collectionId][udfId]; ok {
+		return udf, datastore.StatusOk
+	}
+
+	return datastore.UserDefinedFunction{}, datastore.StatusNotFound
+}
+
+func (r *JsonDataStore) DeleteUserDefinedFunction(databaseId string, collectionId string, udfId string) datastore.DataStoreStatus {
+	r.storeState.Lock()
+	defer r.storeState.Unlock()
+
+	if _, ok := r.storeState.Databases[databaseId]; !ok {
+		return datastore.StatusNotFound
+	}
+
+	if _, ok := r.storeState.Collections[databaseId][collectionId]; !ok {
+		return datastore.StatusNotFound
+	}
+
+	if _, ok := r.storeState.UserDefinedFunctions[databaseId][collectionId][udfId]; !ok {
+		return datastore.StatusNotFound
+	}
+
+	delete(r.storeState.UserDefinedFunctions[databaseId][collectionId], udfId)
+
+	return datastore.StatusOk
+}
+
+func (r *JsonDataStore) CreateUserDefinedFunction(databaseId string, collectionId string, udf datastore.UserDefinedFunction) (datastore.UserDefinedFunction, datastore.DataStoreStatus) {
+	r.storeState.Lock()
+	defer r.storeState.Unlock()
+
+	var ok bool
+	var database datastore.Database
+	var collection datastore.Collection
+	if udf.ID == "" {
+		return datastore.UserDefinedFunction{}, datastore.BadRequest
+	}
+
+	if database, ok = r.storeState.Databases[databaseId]; !ok {
+		return datastore.UserDefinedFunction{}, datastore.StatusNotFound
+	}
+
+	if collection, ok = r.storeState.Collections[databaseId][collectionId]; !ok {
+		return datastore.UserDefinedFunction{}, datastore.StatusNotFound
+	}
+
+	if _, ok := r.storeState.UserDefinedFunctions[databaseId][collectionId][udf.ID]; ok {
+		return datastore.UserDefinedFunction{}, datastore.Conflict
+	}
+
+	udf.TimeStamp = time.Now().Unix()
+	udf.ResourceID = resourceid.NewCombined(collection.ResourceID, resourceid.New(resourceid.ResourceTypeUserDefinedFunction))
+	udf.ETag = fmt.Sprintf("\"%s\"", uuid.New())
+	udf.Self = fmt.Sprintf("dbs/%s/colls/%s/udfs/%s/", database.ResourceID, collection.ResourceID, udf.ResourceID)
+
+	r.storeState.UserDefinedFunctions[databaseId][collectionId][udf.ID] = udf
+
+	return udf, datastore.StatusOk
+}

internal/datastore/models.go

@@ -1,6 +1,4 @@
-package repositorymodels
+package datastore
-
-import "sync"
 
 type Database struct {
 	ID         string `json:"id"`
@@ -10,13 +8,31 @@ type Database struct {
 	Self       string `json:"_self"`
 }
 
-type RepositoryStatus int
+type DataStoreStatus int
 
 const (
 	StatusOk       = 1
 	StatusNotFound = 2
 	Conflict       = 3
 	BadRequest     = 4
+	IterEOF        = 5
+	Unknown        = 6
+)
+
+type TriggerOperation string
+
+const (
+	All     TriggerOperation = "All"
+	Create  TriggerOperation = "Create"
+	Delete  TriggerOperation = "Delete"
+	Replace TriggerOperation = "Replace"
+)
+
+type TriggerType string
+
+const (
+	Pre  TriggerType = "Pre"
+	Post TriggerType = "Post"
 )
 
 type Collection struct {
@@ -60,29 +76,29 @@ type UserDefinedFunction struct {
 	Body       string `json:"body"`
 	ID         string `json:"id"`
 	ResourceID string `json:"_rid"`
-	TimeStamp  int    `json:"_ts"`
+	TimeStamp  int64  `json:"_ts"`
 	Self       string `json:"_self"`
-	Etag       string `json:"_etag"`
+	ETag       string `json:"_etag"`
 }
 
 type StoredProcedure struct {
 	Body       string `json:"body"`
 	ID         string `json:"id"`
 	ResourceID string `json:"_rid"`
-	TimeStamp  int    `json:"_ts"`
+	TimeStamp  int64  `json:"_ts"`
 	Self       string `json:"_self"`
-	Etag       string `json:"_etag"`
+	ETag       string `json:"_etag"`
 }
 
 type Trigger struct {
 	Body             string           `json:"body"`
 	ID               string           `json:"id"`
-	TriggerOperation string `json:"triggerOperation"`
+	TriggerOperation TriggerOperation `json:"triggerOperation"`
-	TriggerType      string `json:"triggerType"`
+	TriggerType      TriggerType      `json:"triggerType"`
 	ResourceID       string           `json:"_rid"`
-	TimeStamp        int    `json:"_ts"`
+	TimeStamp        int64            `json:"_ts"`
 	Self             string           `json:"_self"`
-	Etag             string `json:"_etag"`
+	ETag             string           `json:"_etag"`
 }
 
 type Document map[string]interface{}
@@ -101,16 +117,3 @@ type PartitionKeyRange struct {
 	TimeStamp          int64  `json:"_ts"`
 	Lsn                int    `json:"lsn"`
 }
-
-type State struct {
-	sync.RWMutex
-
-	// Map databaseId -> Database
-	Databases map[string]Database `json:"databases"`
-
-	// Map databaseId -> collectionId -> Collection
-	Collections map[string]map[string]Collection `json:"collections"`
-
-	// Map databaseId -> collectionId -> documentId -> Documents
-	Documents map[string]map[string]map[string]Document `json:"documents"`
-}

internal/logger/logger.go

@@ -1,40 +1,140 @@
 package logger
 
 import (
+	"fmt"
 	"log"
 	"os"
-
+	"runtime"
-	"github.com/pikami/cosmium/api/config"
+	"strings"
+	"sync"
 )
 
-var DebugLogger = log.New(os.Stdout, "", log.Ldate|log.Ltime|log.Lshortfile)
+type LogLevelType int
+
+var (
+	LogLevelDebug  LogLevelType = 0
+	LogLevelInfo   LogLevelType = 1
+	LogLevelError  LogLevelType = 2
+	LogLevelSilent LogLevelType = 10
+)
+
+type LogWriter struct {
+	WriterLevel LogLevelType
+}
+
+var logLevelMutex sync.RWMutex
+var logLevel = LogLevelInfo
+
+var DebugLogger = log.New(os.Stdout, "", log.Ldate|log.Ltime)
 var InfoLogger = log.New(os.Stdout, "", log.Ldate|log.Ltime)
-var ErrorLogger = log.New(os.Stderr, "", log.Ldate|log.Ltime|log.Lshortfile)
+var ErrorLogger = log.New(os.Stderr, "", log.Ldate|log.Ltime)
+
+func DebugLn(v ...any) {
+	if GetLogLevel() <= LogLevelDebug {
+		prefix := getCallerPrefix()
+		DebugLogger.Println(append([]interface{}{prefix}, v...)...)
+	}
+}
 
 func Debug(v ...any) {
-	if config.Config.Debug {
+	if GetLogLevel() <= LogLevelDebug {
-		DebugLogger.Println(v...)
+		prefix := getCallerPrefix()
+		DebugLogger.Println(append([]interface{}{prefix}, v...)...)
 	}
 }
 
 func Debugf(format string, v ...any) {
-	if config.Config.Debug {
+	if GetLogLevel() <= LogLevelDebug {
-		DebugLogger.Printf(format, v...)
+		prefix := getCallerPrefix()
+		DebugLogger.Printf(prefix+format, v...)
+	}
+}
+
+func InfoLn(v ...any) {
+	if GetLogLevel() <= LogLevelInfo {
+		InfoLogger.Println(v...)
 	}
 }
 
 func Info(v ...any) {
-	InfoLogger.Println(v...)
+	if GetLogLevel() <= LogLevelInfo {
+		InfoLogger.Print(v...)
+	}
 }
 
 func Infof(format string, v ...any) {
+	if GetLogLevel() <= LogLevelInfo {
 		InfoLogger.Printf(format, v...)
+	}
+}
+
+func ErrorLn(v ...any) {
+	if GetLogLevel() <= LogLevelError {
+		prefix := getCallerPrefix()
+		ErrorLogger.Println(append([]interface{}{prefix}, v...)...)
+	}
 }
 
 func Error(v ...any) {
-	ErrorLogger.Println(v...)
+	if GetLogLevel() <= LogLevelError {
+		prefix := getCallerPrefix()
+		ErrorLogger.Print(append([]interface{}{prefix}, v...)...)
+	}
 }
 
 func Errorf(format string, v ...any) {
-	ErrorLogger.Printf(format, v...)
+	if GetLogLevel() <= LogLevelError {
+		prefix := getCallerPrefix()
+		ErrorLogger.Printf(prefix+format, v...)
+	}
+}
+
+func (lw *LogWriter) Write(p []byte) (n int, err error) {
+	switch lw.WriterLevel {
+	case LogLevelDebug:
+		Debug(string(p))
+	case LogLevelInfo:
+		Info(string(p))
+	case LogLevelError:
+		Error(string(p))
+	}
+
+	return len(p), nil
+}
+
+func ErrorWriter() *LogWriter {
+	return &LogWriter{WriterLevel: LogLevelError}
+}
+
+func InfoWriter() *LogWriter {
+	return &LogWriter{WriterLevel: LogLevelInfo}
+}
+
+func DebugWriter() *LogWriter {
+	return &LogWriter{WriterLevel: LogLevelDebug}
+}
+
+func SetLogLevel(level LogLevelType) {
+	logLevelMutex.Lock()
+	defer logLevelMutex.Unlock()
+	logLevel = level
+}
+
+func GetLogLevel() LogLevelType {
+	logLevelMutex.RLock()
+	defer logLevelMutex.RUnlock()
+	return logLevel
+}
+
+func getCallerPrefix() string {
+	_, file, line, ok := runtime.Caller(2)
+	if ok {
+		parts := strings.Split(file, "/")
+		if len(parts) > 0 {
+			file = parts[len(parts)-1]
+		}
+		return fmt.Sprintf("%s:%d - ", file, line)
+	}
+
+	return ""
 }

internal/repositories/collections.go

@@ -1,82 +0,0 @@
-package repositories
-
-import (
-	"fmt"
-	"time"
-
-	"github.com/google/uuid"
-	repositorymodels "github.com/pikami/cosmium/internal/repository_models"
-	"github.com/pikami/cosmium/internal/resourceid"
-	structhidrators "github.com/pikami/cosmium/internal/struct_hidrators"
-	"golang.org/x/exp/maps"
-)
-
-func GetAllCollections(databaseId string) ([]repositorymodels.Collection, repositorymodels.RepositoryStatus) {
-	storeState.RLock()
-	defer storeState.RUnlock()
-
-	if _, ok := storeState.Databases[databaseId]; !ok {
-		return make([]repositorymodels.Collection, 0), repositorymodels.StatusNotFound
-	}
-
-	return maps.Values(storeState.Collections[databaseId]), repositorymodels.StatusOk
-}
-
-func GetCollection(databaseId string, collectionId string) (repositorymodels.Collection, repositorymodels.RepositoryStatus) {
-	storeState.RLock()
-	defer storeState.RUnlock()
-
-	if _, ok := storeState.Databases[databaseId]; !ok {
-		return repositorymodels.Collection{}, repositorymodels.StatusNotFound
-	}
-
-	if _, ok := storeState.Collections[databaseId][collectionId]; !ok {
-		return repositorymodels.Collection{}, repositorymodels.StatusNotFound
-	}
-
-	return storeState.Collections[databaseId][collectionId], repositorymodels.StatusOk
-}
-
-func DeleteCollection(databaseId string, collectionId string) repositorymodels.RepositoryStatus {
-	storeState.Lock()
-	defer storeState.Unlock()
-
-	if _, ok := storeState.Databases[databaseId]; !ok {
-		return repositorymodels.StatusNotFound
-	}
-
-	if _, ok := storeState.Collections[databaseId][collectionId]; !ok {
-		return repositorymodels.StatusNotFound
-	}
-
-	delete(storeState.Collections[databaseId], collectionId)
-
-	return repositorymodels.StatusOk
-}
-
-func CreateCollection(databaseId string, newCollection repositorymodels.Collection) (repositorymodels.Collection, repositorymodels.RepositoryStatus) {
-	storeState.Lock()
-	defer storeState.Unlock()
-
-	var ok bool
-	var database repositorymodels.Database
-	if database, ok = storeState.Databases[databaseId]; !ok {
-		return repositorymodels.Collection{}, repositorymodels.StatusNotFound
-	}
-
-	if _, ok = storeState.Collections[databaseId][newCollection.ID]; ok {
-		return repositorymodels.Collection{}, repositorymodels.Conflict
-	}
-
-	newCollection = structhidrators.Hidrate(newCollection).(repositorymodels.Collection)
-
-	newCollection.TimeStamp = time.Now().Unix()
-	newCollection.ResourceID = resourceid.NewCombined(database.ResourceID, resourceid.New())
-	newCollection.ETag = fmt.Sprintf("\"%s\"", uuid.New())
-	newCollection.Self = fmt.Sprintf("dbs/%s/colls/%s/", database.ResourceID, newCollection.ResourceID)
-
-	storeState.Collections[databaseId][newCollection.ID] = newCollection
-	storeState.Documents[databaseId][newCollection.ID] = make(map[string]repositorymodels.Document)
-
-	return newCollection, repositorymodels.StatusOk
-}

internal/repositories/databases.go

@@ -1,62 +0,0 @@
-package repositories
-
-import (
-	"fmt"
-	"time"
-
-	"github.com/google/uuid"
-	repositorymodels "github.com/pikami/cosmium/internal/repository_models"
-	"github.com/pikami/cosmium/internal/resourceid"
-	"golang.org/x/exp/maps"
-)
-
-func GetAllDatabases() ([]repositorymodels.Database, repositorymodels.RepositoryStatus) {
-	storeState.RLock()
-	defer storeState.RUnlock()
-
-	return maps.Values(storeState.Databases), repositorymodels.StatusOk
-}
-
-func GetDatabase(id string) (repositorymodels.Database, repositorymodels.RepositoryStatus) {
-	storeState.RLock()
-	defer storeState.RUnlock()
-
-	if database, ok := storeState.Databases[id]; ok {
-		return database, repositorymodels.StatusOk
-	}
-
-	return repositorymodels.Database{}, repositorymodels.StatusNotFound
-}
-
-func DeleteDatabase(id string) repositorymodels.RepositoryStatus {
-	storeState.Lock()
-	defer storeState.Unlock()
-
-	if _, ok := storeState.Databases[id]; !ok {
-		return repositorymodels.StatusNotFound
-	}
-
-	delete(storeState.Databases, id)
-
-	return repositorymodels.StatusOk
-}
-
-func CreateDatabase(newDatabase repositorymodels.Database) (repositorymodels.Database, repositorymodels.RepositoryStatus) {
-	storeState.Lock()
-	defer storeState.Unlock()
-
-	if _, ok := storeState.Databases[newDatabase.ID]; ok {
-		return repositorymodels.Database{}, repositorymodels.Conflict
-	}
-
-	newDatabase.TimeStamp = time.Now().Unix()
-	newDatabase.ResourceID = resourceid.New()
-	newDatabase.ETag = fmt.Sprintf("\"%s\"", uuid.New())
-	newDatabase.Self = fmt.Sprintf("dbs/%s/", newDatabase.ResourceID)
-
-	storeState.Databases[newDatabase.ID] = newDatabase
-	storeState.Collections[newDatabase.ID] = make(map[string]repositorymodels.Collection)
-	storeState.Documents[newDatabase.ID] = make(map[string]map[string]repositorymodels.Document)
-
-	return newDatabase, repositorymodels.StatusOk
-}

internal/repositories/documents.go

@@ -1,130 +0,0 @@
-package repositories
-
-import (
-	"fmt"
-	"log"
-	"time"
-
-	"github.com/google/uuid"
-	repositorymodels "github.com/pikami/cosmium/internal/repository_models"
-	"github.com/pikami/cosmium/internal/resourceid"
-	"github.com/pikami/cosmium/parsers"
-	"github.com/pikami/cosmium/parsers/nosql"
-	memoryexecutor "github.com/pikami/cosmium/query_executors/memory_executor"
-	"golang.org/x/exp/maps"
-)
-
-func GetAllDocuments(databaseId string, collectionId string) ([]repositorymodels.Document, repositorymodels.RepositoryStatus) {
-	storeState.RLock()
-	defer storeState.RUnlock()
-
-	if _, ok := storeState.Databases[databaseId]; !ok {
-		return make([]repositorymodels.Document, 0), repositorymodels.StatusNotFound
-	}
-
-	if _, ok := storeState.Collections[databaseId][collectionId]; !ok {
-		return make([]repositorymodels.Document, 0), repositorymodels.StatusNotFound
-	}
-
-	return maps.Values(storeState.Documents[databaseId][collectionId]), repositorymodels.StatusOk
-}
-
-func GetDocument(databaseId string, collectionId string, documentId string) (repositorymodels.Document, repositorymodels.RepositoryStatus) {
-	storeState.RLock()
-	defer storeState.RUnlock()
-
-	if _, ok := storeState.Databases[databaseId]; !ok {
-		return repositorymodels.Document{}, repositorymodels.StatusNotFound
-	}
-
-	if _, ok := storeState.Collections[databaseId][collectionId]; !ok {
-		return repositorymodels.Document{}, repositorymodels.StatusNotFound
-	}
-
-	if _, ok := storeState.Documents[databaseId][collectionId][documentId]; !ok {
-		return repositorymodels.Document{}, repositorymodels.StatusNotFound
-	}
-
-	return storeState.Documents[databaseId][collectionId][documentId], repositorymodels.StatusOk
-}
-
-func DeleteDocument(databaseId string, collectionId string, documentId string) repositorymodels.RepositoryStatus {
-	storeState.Lock()
-	defer storeState.Unlock()
-
-	if _, ok := storeState.Databases[databaseId]; !ok {
-		return repositorymodels.StatusNotFound
-	}
-
-	if _, ok := storeState.Collections[databaseId][collectionId]; !ok {
-		return repositorymodels.StatusNotFound
-	}
-
-	if _, ok := storeState.Documents[databaseId][collectionId][documentId]; !ok {
-		return repositorymodels.StatusNotFound
-	}
-
-	delete(storeState.Documents[databaseId][collectionId], documentId)
-
-	return repositorymodels.StatusOk
-}
-
-func CreateDocument(databaseId string, collectionId string, document map[string]interface{}) (repositorymodels.Document, repositorymodels.RepositoryStatus) {
-	storeState.Lock()
-	defer storeState.Unlock()
-
-	var ok bool
-	var documentId string
-	var database repositorymodels.Database
-	var collection repositorymodels.Collection
-	if documentId, ok = document["id"].(string); !ok || documentId == "" {
-		documentId = fmt.Sprint(uuid.New())
-		document["id"] = documentId
-	}
-
-	if database, ok = storeState.Databases[databaseId]; !ok {
-		return repositorymodels.Document{}, repositorymodels.StatusNotFound
-	}
-
-	if collection, ok = storeState.Collections[databaseId][collectionId]; !ok {
-		return repositorymodels.Document{}, repositorymodels.StatusNotFound
-	}
-
-	if _, ok := storeState.Documents[databaseId][collectionId][documentId]; ok {
-		return repositorymodels.Document{}, repositorymodels.Conflict
-	}
-
-	document["_ts"] = time.Now().Unix()
-	document["_rid"] = resourceid.NewCombined(database.ResourceID, collection.ResourceID, resourceid.New())
-	document["_etag"] = fmt.Sprintf("\"%s\"", uuid.New())
-	document["_self"] = fmt.Sprintf("dbs/%s/colls/%s/docs/%s/", database.ResourceID, collection.ResourceID, document["_rid"])
-
-	storeState.Documents[databaseId][collectionId][documentId] = document
-
-	return document, repositorymodels.StatusOk
-}
-
-func ExecuteQueryDocuments(databaseId string, collectionId string, query string, queryParameters map[string]interface{}) ([]memoryexecutor.RowType, repositorymodels.RepositoryStatus) {
-	parsedQuery, err := nosql.Parse("", []byte(query))
-	if err != nil {
-		log.Printf("Failed to parse query: %s\nerr: %v", query, err)
-		return nil, repositorymodels.BadRequest
-	}
-
-	collectionDocuments, status := GetAllDocuments(databaseId, collectionId)
-	if status != repositorymodels.StatusOk {
-		return nil, status
-	}
-
-	covDocs := make([]memoryexecutor.RowType, 0)
-	for _, doc := range collectionDocuments {
-		covDocs = append(covDocs, map[string]interface{}(doc))
-	}
-
-	if typedQuery, ok := parsedQuery.(parsers.SelectStmt); ok {
-		typedQuery.Parameters = queryParameters
-		return memoryexecutor.ExecuteQuery(typedQuery, covDocs), repositorymodels.StatusOk
-	}
-
-	return nil, repositorymodels.BadRequest
-}

internal/repositories/state.go

@@ -1,158 +0,0 @@
-package repositories
-
-import (
-	"encoding/json"
-	"log"
-	"os"
-	"reflect"
-
-	"github.com/pikami/cosmium/api/config"
-	"github.com/pikami/cosmium/internal/logger"
-	repositorymodels "github.com/pikami/cosmium/internal/repository_models"
-)
-
-var storedProcedures = []repositorymodels.StoredProcedure{}
-var triggers = []repositorymodels.Trigger{}
-var userDefinedFunctions = []repositorymodels.UserDefinedFunction{}
-var storeState = repositorymodels.State{
-	Databases:   make(map[string]repositorymodels.Database),
-	Collections: make(map[string]map[string]repositorymodels.Collection),
-	Documents:   make(map[string]map[string]map[string]repositorymodels.Document),
-}
-
-func InitializeRepository() {
-	if config.Config.InitialDataFilePath != "" {
-		LoadStateFS(config.Config.InitialDataFilePath)
-		return
-	}
-
-	if config.Config.PersistDataFilePath != "" {
-		stat, err := os.Stat(config.Config.PersistDataFilePath)
-		if err != nil {
-			return
-		}
-
-		if stat.IsDir() {
-			logger.Error("Argument '-Persist' must be a path to file, not a directory.")
-			os.Exit(1)
-		}
-
-		LoadStateFS(config.Config.PersistDataFilePath)
-		return
-	}
-}
-
-func LoadStateFS(filePath string) {
-	data, err := os.ReadFile(filePath)
-	if err != nil {
-		log.Fatalf("Error reading state JSON file: %v", err)
-		return
-	}
-
-	var state repositorymodels.State
-	if err := json.Unmarshal(data, &state); err != nil {
-		log.Fatalf("Error unmarshalling state JSON: %v", err)
-		return
-	}
-
-	logger.Info("Loaded state:")
-	logger.Infof("Databases: %d\n", getLength(state.Databases))
-	logger.Infof("Collections: %d\n", getLength(state.Collections))
-	logger.Infof("Documents: %d\n", getLength(state.Documents))
-
-	storeState = state
-
-	ensureStoreStateNoNullReferences()
-}
-
-func SaveStateFS(filePath string) {
-	storeState.RLock()
-	defer storeState.RUnlock()
-
-	data, err := json.MarshalIndent(storeState, "", "\t")
-	if err != nil {
-		logger.Errorf("Failed to save state: %v\n", err)
-		return
-	}
-
-	os.WriteFile(filePath, data, os.ModePerm)
-
-	logger.Info("Saved state:")
-	logger.Infof("Databases: %d\n", getLength(storeState.Databases))
-	logger.Infof("Collections: %d\n", getLength(storeState.Collections))
-	logger.Infof("Documents: %d\n", getLength(storeState.Documents))
-}
-
-func GetState() (string, error) {
-	storeState.RLock()
-	defer storeState.RUnlock()
-
-	data, err := json.MarshalIndent(storeState, "", "\t")
-	if err != nil {
-		logger.Errorf("Failed to serialize state: %v\n", err)
-		return "", err
-	}
-
-	return string(data), nil
-}
-
-func getLength(v interface{}) int {
-	switch v.(type) {
-	case repositorymodels.Database,
-		repositorymodels.Collection,
-		repositorymodels.Document:
-		return 1
-	}
-
-	rv := reflect.ValueOf(v)
-	if rv.Kind() != reflect.Map {
-		return -1
-	}
-
-	count := 0
-	for _, key := range rv.MapKeys() {
-		if rv.MapIndex(key).Kind() == reflect.Map {
-			count += getLength(rv.MapIndex(key).Interface())
-		} else {
-			count++
-		}
-	}
-
-	return count
-}
-
-func ensureStoreStateNoNullReferences() {
-	if storeState.Databases == nil {
-		storeState.Databases = make(map[string]repositorymodels.Database)
-	}
-
-	if storeState.Collections == nil {
-		storeState.Collections = make(map[string]map[string]repositorymodels.Collection)
-	}
-
-	if storeState.Documents == nil {
-		storeState.Documents = make(map[string]map[string]map[string]repositorymodels.Document)
-	}
-
-	for database := range storeState.Databases {
-		if storeState.Collections[database] == nil {
-			storeState.Collections[database] = make(map[string]repositorymodels.Collection)
-		}
-
-		if storeState.Documents[database] == nil {
-			storeState.Documents[database] = make(map[string]map[string]repositorymodels.Document)
-		}
-
-		for collection := range storeState.Collections[database] {
-			if storeState.Documents[database][collection] == nil {
-				storeState.Documents[database][collection] = make(map[string]repositorymodels.Document)
-			}
-
-			for document := range storeState.Documents[database][collection] {
-				if storeState.Documents[database][collection][document] == nil {
-					delete(storeState.Documents[database][collection], document)
-				}
-			}
-		}
-	}
-}

internal/repositories/stored_procedures.go

@@ -1,7 +0,0 @@
-package repositories
-
-import repositorymodels "github.com/pikami/cosmium/internal/repository_models"
-
-func GetAllStoredProcedures(databaseId string, collectionId string) ([]repositorymodels.StoredProcedure, repositorymodels.RepositoryStatus) {
-	return storedProcedures, repositorymodels.StatusOk
-}

internal/repositories/triggers.go

@@ -1,7 +0,0 @@
-package repositories
-
-import repositorymodels "github.com/pikami/cosmium/internal/repository_models"
-
-func GetAllTriggers(databaseId string, collectionId string) ([]repositorymodels.Trigger, repositorymodels.RepositoryStatus) {
-	return triggers, repositorymodels.StatusOk
-}

internal/repositories/user_defined_functions.go

@@ -1,7 +0,0 @@
-package repositories
-
-import repositorymodels "github.com/pikami/cosmium/internal/repository_models"
-
-func GetAllUserDefinedFunctions(databaseId string, collectionId string) ([]repositorymodels.UserDefinedFunction, repositorymodels.RepositoryStatus) {
-	return userDefinedFunctions, repositorymodels.StatusOk
-}

internal/resourceid/resourceid.go

@@ -3,32 +3,76 @@ package resourceid
 import (
 	"encoding/base64"
 	"math/rand"
+	"strings"
 
 	"github.com/google/uuid"
 )
 
-func New() string {
+type ResourceType int
-	id := uuid.New().ID()
-	idBytes := uintToBytes(id)
 
+const (
+	ResourceTypeDatabase ResourceType = iota
+	ResourceTypeCollection
+	ResourceTypeDocument
+	ResourceTypeStoredProcedure
+	ResourceTypeTrigger
+	ResourceTypeUserDefinedFunction
+	ResourceTypeConflict
+	ResourceTypePartitionKeyRange
+	ResourceTypeSchema
+)
+
+func New(resourceType ResourceType) string {
+	var idBytes []byte
+	switch resourceType {
+	case ResourceTypeDatabase:
+		idBytes = randomBytes(4)
+	case ResourceTypeCollection:
+		idBytes = randomBytes(4)
 		// first byte should be bigger than 0x80 for collection ids
 		// clients classify this id as "user" otherwise
 		if (idBytes[0] & 0x80) <= 0 {
 			idBytes[0] = byte(rand.Intn(0x80) + 0x80)
 		}
+	case ResourceTypeDocument:
+		idBytes = randomBytes(8)
+		idBytes[7] = byte(rand.Intn(0x10)) // Upper 4 bits = 0
+	case ResourceTypeStoredProcedure:
+		idBytes = randomBytes(8)
+		idBytes[7] = byte(rand.Intn(0x10)) | 0x08 // Upper 4 bits = 0x08
+	case ResourceTypeTrigger:
+		idBytes = randomBytes(8)
+		idBytes[7] = byte(rand.Intn(0x10)) | 0x07 // Upper 4 bits = 0x07
+	case ResourceTypeUserDefinedFunction:
+		idBytes = randomBytes(8)
+		idBytes[7] = byte(rand.Intn(0x10)) | 0x06 // Upper 4 bits = 0x06
+	case ResourceTypeConflict:
+		idBytes = randomBytes(8)
+		idBytes[7] = byte(rand.Intn(0x10)) | 0x04 // Upper 4 bits = 0x04
+	case ResourceTypePartitionKeyRange:
+		// we don't do partitions yet, so just use a fixed id
+		idBytes = []byte{0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x50}
+	case ResourceTypeSchema:
+		idBytes = randomBytes(8)
+		idBytes[7] = byte(rand.Intn(0x10)) | 0x09 // Upper 4 bits = 0x09
+	default:
+		idBytes = randomBytes(4)
+	}
 
-	return base64.StdEncoding.EncodeToString(idBytes)
+	encoded := base64.StdEncoding.EncodeToString(idBytes)
+	return strings.ReplaceAll(encoded, "/", "-")
 }
 
 func NewCombined(ids ...string) string {
 	combinedIdBytes := make([]byte, 0)
 
 	for _, id := range ids {
-		idBytes, _ := base64.StdEncoding.DecodeString(id)
+		idBytes, _ := base64.StdEncoding.DecodeString(strings.ReplaceAll(id, "-", "/"))
 		combinedIdBytes = append(combinedIdBytes, idBytes...)
 	}
 
-	return base64.StdEncoding.EncodeToString(combinedIdBytes)
+	encoded := base64.StdEncoding.EncodeToString(combinedIdBytes)
+	return strings.ReplaceAll(encoded, "/", "-")
 }
 
 func uintToBytes(id uint32) []byte {
@@ -39,3 +83,13 @@ func uintToBytes(id uint32) []byte {
 
 	return buf
 }
+
+func randomBytes(count int) []byte {
+	buf := make([]byte, count)
+	for i := 0; i < count; i += 4 {
+		id := uuid.New().ID()
+		idBytes := uintToBytes(id)
+		copy(buf[i:], idBytes)
+	}
+	return buf
+}

internal/struct_hidrators/collection_defaults.go

@@ -1,21 +1,19 @@
 package structhidrators
 
-import (
+import "github.com/pikami/cosmium/internal/datastore"
-	repositorymodels "github.com/pikami/cosmium/internal/repository_models"
-)
 
-var defaultCollection repositorymodels.Collection = repositorymodels.Collection{
+var defaultCollection datastore.Collection = datastore.Collection{
-	IndexingPolicy: repositorymodels.CollectionIndexingPolicy{
+	IndexingPolicy: datastore.CollectionIndexingPolicy{
 		IndexingMode: "consistent",
 		Automatic:    true,
-		IncludedPaths: []repositorymodels.CollectionIndexingPolicyPath{
+		IncludedPaths: []datastore.CollectionIndexingPolicyPath{
 			{Path: "/*"},
 		},
-		ExcludedPaths: []repositorymodels.CollectionIndexingPolicyPath{
+		ExcludedPaths: []datastore.CollectionIndexingPolicyPath{
 			{Path: "/\"_etag\"/?"},
 		},
 	},
-	PartitionKey: repositorymodels.CollectionPartitionKey{
+	PartitionKey: datastore.CollectionPartitionKey{
 		Paths:   []string{"/_partitionKey"},
 		Kind:    "Hash",
 		Version: 2,

internal/struct_hidrators/hidrate.go

@@ -3,11 +3,11 @@ package structhidrators
 import (
 	"reflect"
 
-	repositorymodels "github.com/pikami/cosmium/internal/repository_models"
+	"github.com/pikami/cosmium/internal/datastore"
 )
 
 func Hidrate(input interface{}) interface{} {
-	if reflect.TypeOf(input) == reflect.TypeOf(repositorymodels.Collection{}) {
+	if reflect.TypeOf(input) == reflect.TypeOf(datastore.Collection{}) {
 		return hidrate(input, defaultCollection)
 	}
 	return input

internal/tls_provider/tls_provider.go

@@ -9,7 +9,7 @@ import (
 func GetDefaultTlsConfig() *tls.Config {
 	cert, err := tls.X509KeyPair([]byte(certificate), []byte(certificateKey))
 	if err != nil {
-		logger.Error("Failed to parse certificate and key:", err)
+		logger.ErrorLn("Failed to parse certificate and key:", err)
 		return &tls.Config{}
 	}
 

main.go

@@ -1,33 +0,0 @@
-package main
-
-import (
-	"os"
-	"os/signal"
-	"syscall"
-
-	"github.com/pikami/cosmium/api"
-	"github.com/pikami/cosmium/api/config"
-	"github.com/pikami/cosmium/internal/repositories"
-)
-
-func main() {
-	config.ParseFlags()
-
-	repositories.InitializeRepository()
-
-	go api.StartAPI()
-
-	waitForExit()
-}
-
-func waitForExit() {
-	sigs := make(chan os.Signal, 1)
-	signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)
-
-	// Block until a exit signal is received
-	<-sigs
-
-	if config.Config.PersistDataFilePath != "" {
-		repositories.SaveStateFS(config.Config.PersistDataFilePath)
-	}
-}

parsers/models.go

@@ -17,6 +17,7 @@ type SelectStmt struct {
 type Table struct {
 	Value      string
 	SelectItem SelectItem
+	IsInSelect bool
 }
 
 type JoinItem struct {
@@ -33,6 +34,8 @@ const (
 	SelectItemTypeConstant
 	SelectItemTypeFunctionCall
 	SelectItemTypeSubQuery
+	SelectItemTypeExpression
+	SelectItemTypeBinaryExpression
 )
 
 type SelectItem struct {
@@ -41,6 +44,7 @@ type SelectItem struct {
 	SelectItems []SelectItem
 	Type        SelectItemType
 	Value       interface{}
+	Invert      bool
 	IsTopLevel  bool
 }
 
@@ -62,6 +66,12 @@ type ComparisonExpression struct {
 	Operation string
 }
 
+type BinaryExpression struct {
+	Left      interface{}
+	Right     interface{}
+	Operation string
+}
+
 type ConstantType int
 
 const (
@@ -124,11 +134,16 @@ const (
 	FunctionCallIsString       FunctionCallType = "IsString"
 
 	FunctionCallArrayConcat      FunctionCallType = "ArrayConcat"
+	FunctionCallArrayContains    FunctionCallType = "ArrayContains"
+	FunctionCallArrayContainsAny FunctionCallType = "ArrayContainsAny"
+	FunctionCallArrayContainsAll FunctionCallType = "ArrayContainsAll"
 	FunctionCallArrayLength      FunctionCallType = "ArrayLength"
 	FunctionCallArraySlice       FunctionCallType = "ArraySlice"
 	FunctionCallSetIntersect     FunctionCallType = "SetIntersect"
 	FunctionCallSetUnion         FunctionCallType = "SetUnion"
 
+	FunctionCallIif FunctionCallType = "Iif"
+
 	FunctionCallMathAbs              FunctionCallType = "MathAbs"
 	FunctionCallMathAcos             FunctionCallType = "MathAcos"
 	FunctionCallMathAsin             FunctionCallType = "MathAsin"

parsers/nosql/aggregate_functions_test.go

@@ -4,6 +4,7 @@ import (
 	"testing"
 
 	"github.com/pikami/cosmium/parsers"
+	testutils "github.com/pikami/cosmium/test_utils"
 )
 
 func Test_Parse_AggregateFunctions(t *testing.T) {
@@ -27,7 +28,7 @@ func Test_Parse_AggregateFunctions(t *testing.T) {
 						},
 					},
 				},
-				Table: parsers.Table{Value: "c"},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
 			},
 		)
 	})
@@ -51,7 +52,7 @@ func Test_Parse_AggregateFunctions(t *testing.T) {
 						},
 					},
 				},
-				Table: parsers.Table{Value: "c"},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
 			},
 		)
 	})
@@ -75,7 +76,7 @@ func Test_Parse_AggregateFunctions(t *testing.T) {
 						},
 					},
 				},
-				Table: parsers.Table{Value: "c"},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
 			},
 		)
 	})
@@ -99,7 +100,7 @@ func Test_Parse_AggregateFunctions(t *testing.T) {
 						},
 					},
 				},
-				Table: parsers.Table{Value: "c"},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
 			},
 		)
 	})
@@ -123,7 +124,7 @@ func Test_Parse_AggregateFunctions(t *testing.T) {
 						},
 					},
 				},
-				Table: parsers.Table{Value: "c"},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
 			},
 		)
 	})

parsers/nosql/arithmetics_test.go

@@ -0,0 +1,366 @@
+package nosql_test
+
+import (
+	"testing"
+
+	"github.com/pikami/cosmium/parsers"
+	testutils "github.com/pikami/cosmium/test_utils"
+)
+
+func Test_Parse_Arithmetics(t *testing.T) {
+	t.Run("Should parse multiplication before addition", func(t *testing.T) {
+		testQueryParse(
+			t,
+			`SELECT c.a + c.b * c.c FROM c`,
+			parsers.SelectStmt{
+				SelectItems: []parsers.SelectItem{
+					{
+						Type: parsers.SelectItemTypeBinaryExpression,
+						Value: parsers.BinaryExpression{
+							Operation: "+",
+							Left:      testutils.SelectItem_Path("c", "a"),
+							Right: parsers.SelectItem{
+								Type: parsers.SelectItemTypeBinaryExpression,
+								Value: parsers.BinaryExpression{
+									Operation: "*",
+									Left:      testutils.SelectItem_Path("c", "b"),
+									Right:     testutils.SelectItem_Path("c", "c"),
+								},
+							},
+						},
+					},
+				},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
+			},
+		)
+	})
+
+	t.Run("Should parse division before subtraction", func(t *testing.T) {
+		testQueryParse(
+			t,
+			`SELECT c.x - c.y / c.z FROM c`,
+			parsers.SelectStmt{
+				SelectItems: []parsers.SelectItem{
+					{
+						Type: parsers.SelectItemTypeBinaryExpression,
+						Value: parsers.BinaryExpression{
+							Operation: "-",
+							Left:      testutils.SelectItem_Path("c", "x"),
+							Right: parsers.SelectItem{
+								Type: parsers.SelectItemTypeBinaryExpression,
+								Value: parsers.BinaryExpression{
+									Operation: "/",
+									Left:      testutils.SelectItem_Path("c", "y"),
+									Right:     testutils.SelectItem_Path("c", "z"),
+								},
+							},
+						},
+					},
+				},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
+			},
+		)
+	})
+
+	t.Run("Should handle complex mixed operations", func(t *testing.T) {
+		testQueryParse(
+			t,
+			`SELECT c.a + c.b * c.c - c.d / c.e FROM c`,
+			parsers.SelectStmt{
+				SelectItems: []parsers.SelectItem{
+					{
+						Type: parsers.SelectItemTypeBinaryExpression,
+						Value: parsers.BinaryExpression{
+							Operation: "-",
+							Left: parsers.SelectItem{
+								Type: parsers.SelectItemTypeBinaryExpression,
+								Value: parsers.BinaryExpression{
+									Operation: "+",
+									Left:      testutils.SelectItem_Path("c", "a"),
+									Right: parsers.SelectItem{
+										Type: parsers.SelectItemTypeBinaryExpression,
+										Value: parsers.BinaryExpression{
+											Operation: "*",
+											Left:      testutils.SelectItem_Path("c", "b"),
+											Right:     testutils.SelectItem_Path("c", "c"),
+										},
+									},
+								},
+							},
+							Right: parsers.SelectItem{
+								Type: parsers.SelectItemTypeBinaryExpression,
+								Value: parsers.BinaryExpression{
+									Operation: "/",
+									Left:      testutils.SelectItem_Path("c", "d"),
+									Right:     testutils.SelectItem_Path("c", "e"),
+								},
+							},
+						},
+					},
+				},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
+			},
+		)
+	})
+
+	t.Run("Should respect parentheses overriding precedence", func(t *testing.T) {
+		testQueryParse(
+			t,
+			`SELECT (c.a + c.b) * c.c FROM c`,
+			parsers.SelectStmt{
+				SelectItems: []parsers.SelectItem{
+					{
+						Type: parsers.SelectItemTypeBinaryExpression,
+						Value: parsers.BinaryExpression{
+							Operation: "*",
+							Left: parsers.SelectItem{
+								Type: parsers.SelectItemTypeBinaryExpression,
+								Value: parsers.BinaryExpression{
+									Operation: "+",
+									Left:      testutils.SelectItem_Path("c", "a"),
+									Right:     testutils.SelectItem_Path("c", "b"),
+								},
+							},
+							Right: testutils.SelectItem_Path("c", "c"),
+						},
+					},
+				},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
+			},
+		)
+	})
+
+	t.Run("Should handle nested parentheses", func(t *testing.T) {
+		testQueryParse(
+			t,
+			`SELECT ((c.a + c.b) * c.c) - c.d FROM c`,
+			parsers.SelectStmt{
+				SelectItems: []parsers.SelectItem{
+					{
+						Type: parsers.SelectItemTypeBinaryExpression,
+						Value: parsers.BinaryExpression{
+							Operation: "-",
+							Left: parsers.SelectItem{
+								Type: parsers.SelectItemTypeBinaryExpression,
+								Value: parsers.BinaryExpression{
+									Operation: "*",
+									Left: parsers.SelectItem{
+										Type: parsers.SelectItemTypeBinaryExpression,
+										Value: parsers.BinaryExpression{
+											Operation: "+",
+											Left:      testutils.SelectItem_Path("c", "a"),
+											Right:     testutils.SelectItem_Path("c", "b"),
+										},
+									},
+									Right: testutils.SelectItem_Path("c", "c"),
+								},
+							},
+							Right: testutils.SelectItem_Path("c", "d"),
+						},
+					},
+				},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
+			},
+		)
+	})
+
+	t.Run("Should be left associative for same precedence operators", func(t *testing.T) {
+		testQueryParse(
+			t,
+			`SELECT c.a - c.b - c.c FROM c`,
+			parsers.SelectStmt{
+				SelectItems: []parsers.SelectItem{
+					{
+						Type: parsers.SelectItemTypeBinaryExpression,
+						Value: parsers.BinaryExpression{
+							Operation: "-",
+							Left: parsers.SelectItem{
+								Type: parsers.SelectItemTypeBinaryExpression,
+								Value: parsers.BinaryExpression{
+									Operation: "-",
+									Left:      testutils.SelectItem_Path("c", "a"),
+									Right:     testutils.SelectItem_Path("c", "b"),
+								},
+							},
+							Right: testutils.SelectItem_Path("c", "c"),
+						},
+					},
+				},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
+			},
+		)
+	})
+
+	t.Run("Should be left associative with multiplication and division", func(t *testing.T) {
+		testQueryParse(
+			t,
+			`SELECT c.a * c.b / c.c FROM c`,
+			parsers.SelectStmt{
+				SelectItems: []parsers.SelectItem{
+					{
+						Type: parsers.SelectItemTypeBinaryExpression,
+						Value: parsers.BinaryExpression{
+							Operation: "/",
+							Left: parsers.SelectItem{
+								Type: parsers.SelectItemTypeBinaryExpression,
+								Value: parsers.BinaryExpression{
+									Operation: "*",
+									Left:      testutils.SelectItem_Path("c", "a"),
+									Right:     testutils.SelectItem_Path("c", "b"),
+								},
+							},
+							Right: testutils.SelectItem_Path("c", "c"),
+						},
+					},
+				},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
+			},
+		)
+	})
+
+	t.Run("Should handle math with constants", func(t *testing.T) {
+		testQueryParse(
+			t,
+			`SELECT 10 + 20 * 5 FROM c`,
+			parsers.SelectStmt{
+				SelectItems: []parsers.SelectItem{
+					{
+						Type: parsers.SelectItemTypeBinaryExpression,
+						Value: parsers.BinaryExpression{
+							Operation: "+",
+							Left:      testutils.SelectItem_Constant_Int(10),
+							Right: parsers.SelectItem{
+								Type: parsers.SelectItemTypeBinaryExpression,
+								Value: parsers.BinaryExpression{
+									Operation: "*",
+									Left:      testutils.SelectItem_Constant_Int(20),
+									Right:     testutils.SelectItem_Constant_Int(5),
+								},
+							},
+						},
+					},
+				},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
+			},
+		)
+	})
+
+	t.Run("Should handle math with floating point numbers", func(t *testing.T) {
+		testQueryParse(
+			t,
+			`SELECT c.price * 1.08 FROM c`,
+			parsers.SelectStmt{
+				SelectItems: []parsers.SelectItem{
+					{
+						Type: parsers.SelectItemTypeBinaryExpression,
+						Value: parsers.BinaryExpression{
+							Operation: "*",
+							Left:      testutils.SelectItem_Path("c", "price"),
+							Right:     testutils.SelectItem_Constant_Float(1.08),
+						},
+					},
+				},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
+			},
+		)
+	})
+
+	t.Run("Should handle parentheses around single value", func(t *testing.T) {
+		testQueryParse(
+			t,
+			`SELECT (c.value) FROM c`,
+			parsers.SelectStmt{
+				SelectItems: []parsers.SelectItem{
+					testutils.SelectItem_Path("c", "value"),
+				},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
+			},
+		)
+	})
+
+	t.Run("Should handle function calls in math expressions", func(t *testing.T) {
+		testQueryParse(
+			t,
+			`SELECT LENGTH(c.name) * 2 + 10 FROM c`,
+			parsers.SelectStmt{
+				SelectItems: []parsers.SelectItem{
+					{
+						Type: parsers.SelectItemTypeBinaryExpression,
+						Value: parsers.BinaryExpression{
+							Operation: "+",
+							Left: parsers.SelectItem{
+								Type: parsers.SelectItemTypeBinaryExpression,
+								Value: parsers.BinaryExpression{
+									Operation: "*",
+									Left: parsers.SelectItem{
+										Type: parsers.SelectItemTypeFunctionCall,
+										Value: parsers.FunctionCall{
+											Type:      parsers.FunctionCallLength,
+											Arguments: []interface{}{testutils.SelectItem_Path("c", "name")},
+										},
+									},
+									Right: testutils.SelectItem_Constant_Int(2),
+								},
+							},
+							Right: testutils.SelectItem_Constant_Int(10),
+						},
+					},
+				},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
+			},
+		)
+	})
+
+	t.Run("Should handle multiple select items with math", func(t *testing.T) {
+		testQueryParse(
+			t,
+			`SELECT c.a + c.b, c.x * c.y FROM c`,
+			parsers.SelectStmt{
+				SelectItems: []parsers.SelectItem{
+					{
+						Type: parsers.SelectItemTypeBinaryExpression,
+						Value: parsers.BinaryExpression{
+							Operation: "+",
+							Left:      testutils.SelectItem_Path("c", "a"),
+							Right:     testutils.SelectItem_Path("c", "b"),
+						},
+					},
+					{
+						Type: parsers.SelectItemTypeBinaryExpression,
+						Value: parsers.BinaryExpression{
+							Operation: "*",
+							Left:      testutils.SelectItem_Path("c", "x"),
+							Right:     testutils.SelectItem_Path("c", "y"),
+						},
+					},
+				},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
+			},
+		)
+	})
+
+	t.Run("Should handle math in WHERE clause", func(t *testing.T) {
+		testQueryParse(
+			t,
+			`SELECT c.id FROM c WHERE c.price * 1.08 > 100`,
+			parsers.SelectStmt{
+				SelectItems: []parsers.SelectItem{
+					testutils.SelectItem_Path("c", "id"),
+				},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
+				Filters: parsers.ComparisonExpression{
+					Operation: ">",
+					Left: parsers.SelectItem{
+						Type: parsers.SelectItemTypeBinaryExpression,
+						Value: parsers.BinaryExpression{
+							Operation: "*",
+							Left:      testutils.SelectItem_Path("c", "price"),
+							Right:     testutils.SelectItem_Constant_Float(1.08),
+						},
+					},
+					Right: testutils.SelectItem_Constant_Int(100),
+				},
+			},
+		)
+	})
+}

parsers/nosql/array_functions_test.go

@@ -4,6 +4,7 @@ import (
 	"testing"
 
 	"github.com/pikami/cosmium/parsers"
+	testutils "github.com/pikami/cosmium/test_utils"
 )
 
 func Test_Parse_ArrayFunctions(t *testing.T) {
@@ -31,7 +32,120 @@ func Test_Parse_ArrayFunctions(t *testing.T) {
 						},
 					},
 				},
-				Table: parsers.Table{Value: "c"},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
+			},
+		)
+	})
+
+	t.Run("Should parse function ARRAY_CONTAINS()", func(t *testing.T) {
+		testQueryParse(
+			t,
+			`SELECT ARRAY_CONTAINS(c.a1, "value") FROM c`,
+			parsers.SelectStmt{
+				SelectItems: []parsers.SelectItem{
+					{
+						Type: parsers.SelectItemTypeFunctionCall,
+						Value: parsers.FunctionCall{
+							Type: parsers.FunctionCallArrayContains,
+							Arguments: []interface{}{
+								parsers.SelectItem{
+									Path: []string{"c", "a1"},
+									Type: parsers.SelectItemTypeField,
+								},
+								testutils.SelectItem_Constant_String("value"),
+								nil,
+							},
+						},
+					},
+				},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
+			},
+		)
+	})
+
+	t.Run("Should parse function ARRAY_CONTAINS() with partial match", func(t *testing.T) {
+		testQueryParse(
+			t,
+			`SELECT ARRAY_CONTAINS(["a", "b"], "value", true) FROM c`,
+			parsers.SelectStmt{
+				SelectItems: []parsers.SelectItem{
+					{
+						Type: parsers.SelectItemTypeFunctionCall,
+						Value: parsers.FunctionCall{
+							Type: parsers.FunctionCallArrayContains,
+							Arguments: []interface{}{
+								parsers.SelectItem{
+									Type: parsers.SelectItemTypeArray,
+									SelectItems: []parsers.SelectItem{
+										testutils.SelectItem_Constant_String("a"),
+										testutils.SelectItem_Constant_String("b"),
+									},
+								},
+								testutils.SelectItem_Constant_String("value"),
+								testutils.SelectItem_Constant_Bool(true),
+							},
+						},
+					},
+				},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
+			},
+		)
+	})
+
+	t.Run("Should parse function ARRAY_CONTAINS_ANY()", func(t *testing.T) {
+		testQueryParse(
+			t,
+			`SELECT ARRAY_CONTAINS_ANY(["a", "b"], "value", true) FROM c`,
+			parsers.SelectStmt{
+				SelectItems: []parsers.SelectItem{
+					{
+						Type: parsers.SelectItemTypeFunctionCall,
+						Value: parsers.FunctionCall{
+							Type: parsers.FunctionCallArrayContainsAny,
+							Arguments: []interface{}{
+								parsers.SelectItem{
+									Type: parsers.SelectItemTypeArray,
+									SelectItems: []parsers.SelectItem{
+										testutils.SelectItem_Constant_String("a"),
+										testutils.SelectItem_Constant_String("b"),
+									},
+								},
+								testutils.SelectItem_Constant_String("value"),
+								testutils.SelectItem_Constant_Bool(true),
+							},
+						},
+					},
+				},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
+			},
+		)
+	})
+
+	t.Run("Should parse function ARRAY_CONTAINS_ALL()", func(t *testing.T) {
+		testQueryParse(
+			t,
+			`SELECT ARRAY_CONTAINS_ALL(["a", "b"], "value", true) FROM c`,
+			parsers.SelectStmt{
+				SelectItems: []parsers.SelectItem{
+					{
+						Type: parsers.SelectItemTypeFunctionCall,
+						Value: parsers.FunctionCall{
+							Type: parsers.FunctionCallArrayContainsAll,
+							Arguments: []interface{}{
+								parsers.SelectItem{
+									Type: parsers.SelectItemTypeArray,
+									SelectItems: []parsers.SelectItem{
+										testutils.SelectItem_Constant_String("a"),
+										testutils.SelectItem_Constant_String("b"),
+									},
+								},
+								testutils.SelectItem_Constant_String("value"),
+								testutils.SelectItem_Constant_Bool(true),
+							},
+						},
+					},
+				},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
 			},
 		)
 	})
@@ -55,7 +169,7 @@ func Test_Parse_ArrayFunctions(t *testing.T) {
 						},
 					},
 				},
-				Table: parsers.Table{Value: "c"},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
 			},
 		)
 	})
@@ -75,25 +189,13 @@ func Test_Parse_ArrayFunctions(t *testing.T) {
 									Path: []string{"c", "array"},
 									Type: parsers.SelectItemTypeField,
 								},
-								parsers.SelectItem{
+								testutils.SelectItem_Constant_Int(0),
-									Type: parsers.SelectItemTypeConstant,
+								testutils.SelectItem_Constant_Int(2),
-									Value: parsers.Constant{
-										Type:  parsers.ConstantTypeInteger,
-										Value: 0,
-									},
-								},
-								parsers.SelectItem{
-									Type: parsers.SelectItemTypeConstant,
-									Value: parsers.Constant{
-										Type:  parsers.ConstantTypeInteger,
-										Value: 2,
 							},
 						},
 					},
 				},
-					},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
-				},
-				Table: parsers.Table{Value: "c"},
 			},
 		)
 	})
@@ -121,7 +223,7 @@ func Test_Parse_ArrayFunctions(t *testing.T) {
 						},
 					},
 				},
-				Table: parsers.Table{Value: "c"},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
 			},
 		)
 	})
@@ -149,7 +251,7 @@ func Test_Parse_ArrayFunctions(t *testing.T) {
 						},
 					},
 				},
-				Table: parsers.Table{Value: "c"},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
 			},
 		)
 	})

parsers/nosql/join_test.go

@@ -4,6 +4,7 @@ import (
 	"testing"
 
 	"github.com/pikami/cosmium/parsers"
+	testutils "github.com/pikami/cosmium/test_utils"
 )
 
 func Test_Parse_Join(t *testing.T) {
@@ -17,7 +18,7 @@ func Test_Parse_Join(t *testing.T) {
 					{Path: []string{"c", "id"}},
 					{Path: []string{"c", "pk"}},
 				},
-				Table: parsers.Table{Value: "c"},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
 				JoinItems: []parsers.JoinItem{
 					{
 						Table: parsers.Table{
@@ -40,7 +41,7 @@ func Test_Parse_Join(t *testing.T) {
 				SelectItems: []parsers.SelectItem{
 					{Path: []string{"cc"}, IsTopLevel: true},
 				},
-				Table: parsers.Table{Value: "c"},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
 				JoinItems: []parsers.JoinItem{
 					{
 						Table: parsers.Table{

parsers/nosql/math_functions_test.go

@@ -4,6 +4,7 @@ import (
 	"testing"
 
 	"github.com/pikami/cosmium/parsers"
+	testutils "github.com/pikami/cosmium/test_utils"
 )
 
 func Test_Execute_MathFunctions(t *testing.T) {
@@ -644,7 +645,7 @@ func testMathFunctionParse(
 					},
 				},
 			},
-			Table: parsers.Table{Value: expectedTable},
+			Table: parsers.Table{SelectItem: testutils.SelectItem_Path(expectedTable)},
 		},
 	)
 }

parsers/nosql/misc_test.go

@@ -7,6 +7,7 @@ import (
 
 	"github.com/pikami/cosmium/parsers"
 	"github.com/pikami/cosmium/parsers/nosql"
+	testutils "github.com/pikami/cosmium/test_utils"
 )
 
 // For Parser Debugging
@@ -48,7 +49,7 @@ func Test_Parse(t *testing.T) {
 					{Path: []string{"c", "id"}},
 					{Path: []string{"c", "pk"}},
 				},
-				Table: parsers.Table{Value: "c"},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
 				OrderExpressions: []parsers.OrderExpression{
 					{
 						SelectItem: parsers.SelectItem{Path: []string{"c", "id"}},
@@ -72,7 +73,7 @@ func Test_Parse(t *testing.T) {
 					{Path: []string{"c", "id"}},
 					{Path: []string{"c", "pk"}},
 				},
-				Table: parsers.Table{Value: "c"},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
 				GroupBy: []parsers.SelectItem{
 					{Path: []string{"c", "id"}},
 					{Path: []string{"c", "pk"}},
@@ -92,7 +93,7 @@ func Test_Parse(t *testing.T) {
 						Type: parsers.SelectItemTypeField,
 					},
 				},
-				Table: parsers.Table{Value: "c"},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
 				Filters: parsers.SelectItem{
 					Type: parsers.SelectItemTypeFunctionCall,
 					Value: parsers.FunctionCall{
@@ -102,20 +103,40 @@ func Test_Parse(t *testing.T) {
 								Path: []string{"c", "id"},
 								Type: parsers.SelectItemTypeField,
 							},
+							testutils.SelectItem_Constant_String("123"),
+							testutils.SelectItem_Constant_String("456"),
+						},
+					},
+				},
+			},
+		)
+	})
+
+	t.Run("Should parse IN function with function call", func(t *testing.T) {
+		testQueryParse(
+			t,
+			`Select c.id FROM c WHERE (ToString(c.id) IN ("123", "456"))`,
+			parsers.SelectStmt{
+				SelectItems: []parsers.SelectItem{
+					testutils.SelectItem_Path("c", "id"),
+				},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
+				Filters: parsers.SelectItem{
+					Type: parsers.SelectItemTypeFunctionCall,
+					Value: parsers.FunctionCall{
+						Type: parsers.FunctionCallIn,
+						Arguments: []interface{}{
 							parsers.SelectItem{
-								Type: parsers.SelectItemTypeConstant,
+								Type: parsers.SelectItemTypeFunctionCall,
-								Value: parsers.Constant{
+								Value: parsers.FunctionCall{
-									Type:  parsers.ConstantTypeString,
+									Type: parsers.FunctionCallToString,
-									Value: "123",
+									Arguments: []interface{}{
+										testutils.SelectItem_Path("c", "id"),
 									},
 								},
-							parsers.SelectItem{
-								Type: parsers.SelectItemTypeConstant,
-								Value: parsers.Constant{
-									Type:  parsers.ConstantTypeString,
-									Value: "456",
-								},
 							},
+							testutils.SelectItem_Constant_String("123"),
+							testutils.SelectItem_Constant_String("456"),
 						},
 					},
 				},
@@ -136,11 +157,33 @@ func Test_Parse(t *testing.T) {
 				},
 				Table: parsers.Table{
 					Value:      "c",
-					SelectItem: parsers.SelectItem{
+					SelectItem: testutils.SelectItem_Path("c", "tags"),
-						Path: []string{"c", "tags"},
+					IsInSelect: true,
-					},
 				},
 			},
 		)
 	})
+
+	t.Run("Should parse IIF function", func(t *testing.T) {
+		testQueryParse(
+			t,
+			`SELECT IIF(true, c.pk, c.id) FROM c`,
+			parsers.SelectStmt{
+				SelectItems: []parsers.SelectItem{
+					{
+						Type: parsers.SelectItemTypeFunctionCall,
+						Value: parsers.FunctionCall{
+							Type: parsers.FunctionCallIif,
+							Arguments: []interface{}{
+								testutils.SelectItem_Constant_Bool(true),
+								testutils.SelectItem_Path("c", "pk"),
+								testutils.SelectItem_Path("c", "id"),
+							},
+						},
+					},
+				},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
+			},
+		)
+	})
 }

parsers/nosql/nosql.peg

@@ -178,6 +178,32 @@ func combineExpressions(ex1 interface{}, exs interface{}, operation parsers.Logi
     }, nil
 }
 
+func makeMathExpression(left interface{}, operations interface{}) (interface{}, error) {
+    if operations == nil || len(operations.([]interface{})) == 0 {
+        return left, nil
+    }
+
+    result := left.(parsers.SelectItem)
+    ops := operations.([]interface{})
+    
+    for _, op := range ops {
+        opData := op.([]interface{})
+        operation := opData[0].(string)
+        right := opData[1].(parsers.SelectItem)
+
+        result = parsers.SelectItem{
+			Type: parsers.SelectItemTypeBinaryExpression,
+			Value: parsers.BinaryExpression{
+				Left: result,
+				Right: right,
+				Operation: operation,
+			},
+		}
+    }
+    
+    return result, nil
+}
+
 }
 
 Input <- selectStmt:SelectStmt {
@@ -204,14 +230,22 @@ TopClause <- Top ws count:Integer {
     return count, nil
 }
 
-FromClause <- From ws table:TableName selectItem:(ws "IN"i ws column:SelectItem { return column, nil })? {
+FromClause <- From ws table:TableName selectItem:(ws In ws column:SelectItemWithAlias { return column, nil }) {
     tableTyped := table.(parsers.Table)
 
     if selectItem != nil {
         tableTyped.SelectItem = selectItem.(parsers.SelectItem)
+        tableTyped.IsInSelect = true
     }
 
     return tableTyped, nil
+} / From ws column:SelectItemWithAlias {
+    tableSelectItem := column.(parsers.SelectItem)
+    table := parsers.Table{
+        Value: tableSelectItem.Alias,
+        SelectItem: tableSelectItem,
+    }
+    return table, nil
 } / From ws subQuery:SubQuerySelectItem {
     subQueryTyped := subQuery.(parsers.SelectItem)
     table := parsers.Table{
@@ -243,13 +277,13 @@ SubQuerySelectItem <- subQuery:SubQuery asClause:(ws alias:AsClause { return ali
     return selectItem, nil
 }
 
-JoinClause <- Join ws table:TableName ws "IN"i ws column:SelectItem {
+JoinClause <- Join ws table:TableName ws In ws column:SelectItemWithAlias {
     return makeJoin(table, column)
 } / Join ws subQuery:SubQuerySelectItem {
     return makeJoin(nil, subQuery)
 }
 
-OffsetClause <- "OFFSET"i ws offset:IntegerLiteral ws "LIMIT"i ws limit:IntegerLiteral {
+OffsetClause <- Offset ws offset:IntegerLiteral ws "LIMIT"i ws limit:IntegerLiteral {
     return []interface{}{offset.(parsers.Constant).Value, limit.(parsers.Constant).Value}, nil
 }
 
@@ -261,11 +295,34 @@ SelectAsterisk <- "*" {
     return makeColumnList(selectItem, make([]interface{}, 0))
 }
 
-ColumnList <- column:SelectItem other_columns:(ws "," ws coll:SelectItem {return coll, nil })* {
+ColumnList <- column:ExpressionOrSelectItem other_columns:(ws "," ws coll:ExpressionOrSelectItem {return coll, nil })* {
     return makeColumnList(column, other_columns)
 }
 
-SelectValueSpec <- "VALUE"i ws column:SelectItem {
+ExpressionOrSelectItem <- expression:OrExpression asClause:AsClause? {
+    switch typedValue := expression.(type) {
+    case parsers.ComparisonExpression, parsers.LogicalExpression:
+        selectItem := parsers.SelectItem{
+            Type: parsers.SelectItemTypeExpression,
+            Value: typedValue,
+        }
+
+        if aliasValue, ok := asClause.(string); ok {
+            selectItem.Alias = aliasValue
+        }
+
+        return selectItem, nil
+    case parsers.SelectItem:
+        if aliasValue, ok := asClause.(string); ok {
+            typedValue.Alias = aliasValue
+        }
+        return typedValue, nil
+    default:
+        return typedValue, nil
+    }
+} / item:SelectItemWithAlias { return item, nil }
+
+SelectValueSpec <- "VALUE"i ws column:SelectItemWithAlias {
     selectItem := column.(parsers.SelectItem)
     selectItem.IsTopLevel = true
     return makeColumnList(selectItem, make([]interface{}, 0))
@@ -281,6 +338,11 @@ SelectArray <- "[" ws columns:ColumnList ws "]" {
 
 SelectObject <- "{" ws field:SelectObjectField ws other_fields:(ws "," ws coll:SelectObjectField {return coll, nil })* ws "}" {
     return makeSelectObject(field, other_fields)
+} / "{" ws "}" {
+    return parsers.SelectItem{
+        SelectItems: []parsers.SelectItem{},
+        Type:        parsers.SelectItemTypeObject,
+    }, nil
 }
 
 SelectObjectField <- name:(Identifier / "\"" key:Identifier "\"" { return key, nil }) ws ":" ws selectItem:SelectItem {
@@ -293,7 +355,15 @@ SelectProperty <- name:Identifier path:(DotFieldAccess / ArrayFieldAccess)* {
     return makeSelectItem(name, path, parsers.SelectItemTypeField)
 }
 
-SelectItem <- selectItem:(SubQuerySelectItem / Literal / FunctionCall / SelectArray / SelectObject / SelectProperty) asClause:AsClause? {
+SelectItemWithAlias <- selectItem:SelectItem asClause:AsClause? {
+    item := selectItem.(parsers.SelectItem)
+    if aliasValue, ok := asClause.(string); ok {
+        item.Alias = aliasValue
+    }
+    return item, nil
+}
+
+SelectItem <- selectItem:(SubQuerySelectItem / Literal / FunctionCall / SelectArray / SelectObject / SelectProperty) {
     var itemResult parsers.SelectItem
     switch typedValue := selectItem.(type) {
     case parsers.SelectItem:
@@ -310,14 +380,14 @@ SelectItem <- selectItem:(SubQuerySelectItem / Literal / FunctionCall / SelectAr
         }
     }
 
-	if aliasValue, ok := asClause.(string); ok {
-		itemResult.Alias = aliasValue
-	}
-
     return itemResult, nil
 }
 
-AsClause <- ws As ws alias:Identifier { return alias, nil }
+AsClause <- (ws As)? ws !ExcludedKeywords alias:Identifier {
+    return alias, nil
+}
+
+ExcludedKeywords <- Select / Top / As / From / In / Join / Exists / Where / And / Or / Not / GroupBy / OrderBy / Offset
 
 DotFieldAccess <- "." id:Identifier {
     return id, nil
@@ -325,6 +395,7 @@ DotFieldAccess <- "." id:Identifier {
 
 ArrayFieldAccess <- "[\"" id:Identifier "\"]" { return id, nil }
   / "[" id:Integer "]" { return strconv.Itoa(id.(int)), nil }
+  / "[" id:ParameterConstant "]" { return id.(parsers.Constant).Value.(string), nil }
 
 Identifier <- [a-zA-Z_][a-zA-Z0-9_]* {
     return string(c.text), nil
@@ -342,11 +413,27 @@ AndExpression <- ex1:ComparisonExpression ex2:(ws And ws ex:ComparisonExpression
     return combineExpressions(ex1, ex2, parsers.LogicalExpressionTypeAnd)
 }
 
-ComparisonExpression <- "(" ws ex:OrExpression ws ")" { return ex, nil }
+ComparisonExpression <- left:AddSubExpression ws op:ComparisonOperator ws right:AddSubExpression {
-    / left:SelectItem ws op:ComparisonOperator ws right:SelectItem {
     return parsers.ComparisonExpression{Left:left,Right:right,Operation:op.(string)}, nil
+} / ex:AddSubExpression { return ex, nil }
+
+AddSubExpression <- left:MulDivExpression operations:(ws op:AddOrSubtractOperation ws right:MulDivExpression { return []interface{}{op, right}, nil })* {
+    return makeMathExpression(left, operations)
+}
+
+MulDivExpression <- left:SelectItemWithParentheses operations:(ws op:MultiplyOrDivideOperation ws right:SelectItemWithParentheses { return []interface{}{op, right}, nil })* {
+    return makeMathExpression(left, operations)
+}
+
+SelectItemWithParentheses <- "(" ws ex:OrExpression ws ")" { return ex, nil }
+    / inv:(Not ws)? ex:SelectItem {
+    if inv != nil {
+        ex1 := ex.(parsers.SelectItem)
+        ex1.Invert = true
+        return ex1, nil
+    }
+    return ex, nil
 } / ex:BooleanLiteral { return ex, nil }
-  / ex:SelectItem { return ex, nil }
 
 OrderByClause <- OrderBy ws ex1:OrderExpression others:(ws "," ws ex:OrderExpression { return ex, nil })* {
     return makeOrderByClause(ex1, others)
@@ -372,6 +459,8 @@ As <- "AS"i
 
 From <- "FROM"i
 
+In <- "IN"i
+
 Join <- "JOIN"i
 
 Exists <- "EXISTS"i
@@ -382,14 +471,22 @@ And <- "AND"i
 
 Or <- "OR"i wss
 
+Not <- "NOT"i
+
 GroupBy <- "GROUP"i ws "BY"i
 
 OrderBy <- "ORDER"i ws "BY"i
 
-ComparisonOperator <- ("=" / "!=" / "<" / "<=" / ">" / ">=") {
+Offset <- "OFFSET"i
+
+ComparisonOperator <- ("<=" / ">=" / "=" / "!=" / "<" / ">") {
     return string(c.text), nil
 }
 
+AddOrSubtractOperation <- ("+" / "-") { return string(c.text), nil }
+
+MultiplyOrDivideOperation <- ("*" / "/") { return string(c.text), nil }
+
 Literal <- FloatLiteral / IntegerLiteral / StringLiteral / BooleanLiteral / ParameterConstant / NullConstant
 
 ParameterConstant <- "@" Identifier {
@@ -417,6 +514,7 @@ BooleanLiteral <- ("true"i / "false"i) {
 FunctionCall <- StringFunctions
     / TypeCheckingFunctions
     / ArrayFunctions
+    / ConditionalFunctions
     / InFunction
     / AggregateFunctions
     / MathFunctions
@@ -456,11 +554,16 @@ AggregateFunctions <- AvgAggregateExpression
     / SumAggregateExpression
 
 ArrayFunctions <- ArrayConcatExpression
+    / ArrayContainsExpression
+    / ArrayContainsAnyExpression
+    / ArrayContainsAllExpression
     / ArrayLengthExpression
     / ArraySliceExpression
     / SetIntersectExpression
     / SetUnionExpression
 
+ConditionalFunctions <- IifExpression
+
 MathFunctions <- MathAbsExpression
     / MathAcosExpression
     / MathAsinExpression
@@ -625,6 +728,18 @@ ArrayConcatExpression <- "ARRAY_CONCAT"i ws "(" ws arrays:SelectItem others:(ws
     return createFunctionCall(parsers.FunctionCallArrayConcat, append([]interface{}{arrays}, others.([]interface{})...))
 }
 
+ArrayContainsExpression <- "ARRAY_CONTAINS"i ws "(" ws array:SelectItem ws "," ws item:SelectItem partialMatch:(ws "," ws ex:SelectItem { return ex, nil })? ws ")" {
+    return createFunctionCall(parsers.FunctionCallArrayContains, []interface{}{array, item, partialMatch})
+}
+
+ArrayContainsAnyExpression <- "ARRAY_CONTAINS_ANY"i ws "(" ws array:SelectItem items:(ws "," ws ex:SelectItem { return ex, nil })+ ws ")" {
+    return createFunctionCall(parsers.FunctionCallArrayContainsAny, append([]interface{}{array}, items.([]interface{})...))
+}
+
+ArrayContainsAllExpression <- "ARRAY_CONTAINS_ALL"i ws "(" ws array:SelectItem items:(ws "," ws ex:SelectItem { return ex, nil })+ ws ")" {
+    return createFunctionCall(parsers.FunctionCallArrayContainsAll, append([]interface{}{array}, items.([]interface{})...))
+}
+
 ArrayLengthExpression <- "ARRAY_LENGTH"i ws "(" ws array:SelectItem ws ")" {
     return createFunctionCall(parsers.FunctionCallArrayLength, []interface{}{array})
 }
@@ -641,6 +756,10 @@ SetUnionExpression <- "SetUnion"i ws "(" ws set1:SelectItem ws "," ws set2:Selec
     return createFunctionCall(parsers.FunctionCallSetUnion, []interface{}{set1, set2})
 }
 
+IifExpression <- "IIF"i ws "(" ws condition:SelectItem ws "," ws trueValue:SelectItem ws "," ws falseValue:SelectItem ws ")" {
+    return createFunctionCall(parsers.FunctionCallIif, []interface{}{condition, trueValue, falseValue})
+}
+
 MathAbsExpression <- "ABS"i ws "(" ws ex:SelectItem ws ")" { return createFunctionCall(parsers.FunctionCallMathAbs, []interface{}{ex}) }
 MathAcosExpression <- "ACOS"i ws "(" ws ex:SelectItem ws ")" { return createFunctionCall(parsers.FunctionCallMathAcos, []interface{}{ex}) }
 MathAsinExpression <- "ASIN"i ws "(" ws ex:SelectItem ws ")" { return createFunctionCall(parsers.FunctionCallMathAsin, []interface{}{ex}) }
@@ -684,7 +803,9 @@ MathNumberBinExpression <- "NumberBin"i ws "(" ws ex1:SelectItem others:(ws ","
 MathPiExpression <- "PI"i ws "(" ws ")" { return createFunctionCall(parsers.FunctionCallMathPi, []interface{}{}) }
 MathRandExpression <- "RAND"i ws "(" ws ")" { return createFunctionCall(parsers.FunctionCallMathRand, []interface{}{}) }
 
-InFunction <- ex1:SelectProperty ws "IN"i ws "(" ws ex2:SelectItem others:(ws "," ws ex:SelectItem { return ex, nil })* ws ")" {
+InFunction <- ex1:SelectProperty ws In ws "(" ws ex2:SelectItem others:(ws "," ws ex:SelectItem { return ex, nil })* ws ")" {
+    return createFunctionCall(parsers.FunctionCallIn, append([]interface{}{ex1, ex2}, others.([]interface{})...))
+} / "(" ws ex1:SelectItem ws In ws "(" ws ex2:SelectItem others:(ws "," ws ex:SelectItem { return ex, nil })* ws ")" ws ")" {
     return createFunctionCall(parsers.FunctionCallIn, append([]interface{}{ex1, ex2}, others.([]interface{})...))
 }
 

parsers/nosql/select_test.go

@@ -4,6 +4,7 @@ import (
 	"testing"
 
 	"github.com/pikami/cosmium/parsers"
+	testutils "github.com/pikami/cosmium/test_utils"
 )
 
 func Test_Parse_Select(t *testing.T) {
@@ -17,7 +18,21 @@ func Test_Parse_Select(t *testing.T) {
 					{Path: []string{"c", "id"}},
 					{Path: []string{"c", "pk"}},
 				},
-				Table: parsers.Table{Value: "c"},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
+			},
+		)
+	})
+
+	t.Run("Should parse SELECT with query parameters as accessor", func(t *testing.T) {
+		testQueryParse(
+			t,
+			`SELECT c.id, c[@param] FROM c`,
+			parsers.SelectStmt{
+				SelectItems: []parsers.SelectItem{
+					{Path: []string{"c", "id"}},
+					{Path: []string{"c", "@param"}},
+				},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
 			},
 		)
 	})
@@ -30,7 +45,7 @@ func Test_Parse_Select(t *testing.T) {
 				SelectItems: []parsers.SelectItem{
 					{Path: []string{"c", "id"}},
 				},
-				Table:    parsers.Table{Value: "c"},
+				Table:    parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
 				Distinct: true,
 			},
 		)
@@ -44,7 +59,7 @@ func Test_Parse_Select(t *testing.T) {
 				SelectItems: []parsers.SelectItem{
 					{Path: []string{"c", "id"}},
 				},
-				Table: parsers.Table{Value: "c"},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
 				Count: 1,
 			},
 		)
@@ -58,7 +73,7 @@ func Test_Parse_Select(t *testing.T) {
 				SelectItems: []parsers.SelectItem{
 					{Path: []string{"c", "id"}},
 				},
-				Table:  parsers.Table{Value: "c"},
+				Table:  parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
 				Count:  5,
 				Offset: 3,
 			},
@@ -73,7 +88,7 @@ func Test_Parse_Select(t *testing.T) {
 				SelectItems: []parsers.SelectItem{
 					{Path: []string{"c", "id"}, IsTopLevel: true},
 				},
-				Table: parsers.Table{Value: "c"},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
 			},
 		)
 	})
@@ -86,7 +101,20 @@ func Test_Parse_Select(t *testing.T) {
 				SelectItems: []parsers.SelectItem{
 					{Path: []string{"c"}, IsTopLevel: true},
 				},
-				Table: parsers.Table{Value: "c"},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
+			},
+		)
+	})
+
+	t.Run("Should parse SELECT c", func(t *testing.T) {
+		testQueryParse(
+			t,
+			`SELECT c FROM c`,
+			parsers.SelectStmt{
+				SelectItems: []parsers.SelectItem{
+					{Path: []string{"c"}, IsTopLevel: false},
+				},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
 			},
 		)
 	})
@@ -106,7 +134,27 @@ func Test_Parse_Select(t *testing.T) {
 						},
 					},
 				},
-				Table: parsers.Table{Value: "c"},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
+			},
+		)
+	})
+
+	t.Run("Should parse SELECT with alias", func(t *testing.T) {
+		testQueryParse(
+			t,
+			`SELECT
+			  c.id AS aliasWithAs,
+			  c.pk aliasWithoutAs
+			FROM root c`,
+			parsers.SelectStmt{
+				SelectItems: []parsers.SelectItem{
+					{Alias: "aliasWithAs", Path: []string{"c", "id"}},
+					{Alias: "aliasWithoutAs", Path: []string{"c", "pk"}},
+				},
+				Table: parsers.Table{
+					Value:      "c",
+					SelectItem: parsers.SelectItem{Alias: "c", Path: []string{"root"}},
+				},
 			},
 		)
 	})
@@ -126,7 +174,93 @@ func Test_Parse_Select(t *testing.T) {
 						},
 					},
 				},
-				Table: parsers.Table{Value: "c"},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
+			},
+		)
+	})
+
+	t.Run("Should parse SELECT empty object", func(t *testing.T) {
+		testQueryParse(
+			t,
+			`SELECT {} AS obj FROM c`,
+			parsers.SelectStmt{
+				SelectItems: []parsers.SelectItem{
+					{
+						Alias:       "obj",
+						Type:        parsers.SelectItemTypeObject,
+						SelectItems: []parsers.SelectItem{},
+					},
+				},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
+			},
+		)
+	})
+
+	t.Run("Should parse comparison expressions in SELECT", func(t *testing.T) {
+		testQueryParse(
+			t,
+			`SELECT c["id"] = "123", c["pk"] > 456 FROM c`,
+			parsers.SelectStmt{
+				SelectItems: []parsers.SelectItem{
+					{
+						Type: parsers.SelectItemTypeExpression,
+						Value: parsers.ComparisonExpression{
+							Operation: "=",
+							Left:      testutils.SelectItem_Path("c", "id"),
+							Right:     testutils.SelectItem_Constant_String("123"),
+						},
+					},
+					{
+						Type: parsers.SelectItemTypeExpression,
+						Value: parsers.ComparisonExpression{
+							Operation: ">",
+							Left:      testutils.SelectItem_Path("c", "pk"),
+							Right:     testutils.SelectItem_Constant_Int(456),
+						},
+					},
+				},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
+			},
+		)
+	})
+
+	t.Run("Should parse logical expressions in SELECT", func(t *testing.T) {
+		testQueryParse(
+			t,
+			`SELECT c["id"] = "123" OR c["pk"] > 456, c["isCool"] AND c["hasRizz"] AS isRizzler FROM c`,
+			parsers.SelectStmt{
+				SelectItems: []parsers.SelectItem{
+					{
+						Type: parsers.SelectItemTypeExpression,
+						Value: parsers.LogicalExpression{
+							Operation: parsers.LogicalExpressionTypeOr,
+							Expressions: []interface{}{
+								parsers.ComparisonExpression{
+									Operation: "=",
+									Left:      testutils.SelectItem_Path("c", "id"),
+									Right:     testutils.SelectItem_Constant_String("123"),
+								},
+								parsers.ComparisonExpression{
+									Operation: ">",
+									Left:      testutils.SelectItem_Path("c", "pk"),
+									Right:     testutils.SelectItem_Constant_Int(456),
+								},
+							},
+						},
+					},
+					{
+						Type:  parsers.SelectItemTypeExpression,
+						Alias: "isRizzler",
+						Value: parsers.LogicalExpression{
+							Operation: parsers.LogicalExpressionTypeAnd,
+							Expressions: []interface{}{
+								testutils.SelectItem_Path("c", "isCool"),
+								testutils.SelectItem_Path("c", "hasRizz"),
+							},
+						},
+					},
+				},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
 			},
 		)
 	})

parsers/nosql/string_functions_test.go

@@ -4,6 +4,7 @@ import (
 	"testing"
 
 	"github.com/pikami/cosmium/parsers"
+	testutils "github.com/pikami/cosmium/test_utils"
 )
 
 func Test_Execute_StringFunctions(t *testing.T) {
@@ -23,25 +24,13 @@ func Test_Execute_StringFunctions(t *testing.T) {
 									Path: []string{"c", "id"},
 									Type: parsers.SelectItemTypeField,
 								},
-								parsers.SelectItem{
+								testutils.SelectItem_Constant_String("123"),
-									Type: parsers.SelectItemTypeConstant,
+								testutils.SelectItem_Constant_Bool(true),
-									Value: parsers.Constant{
-										Type:  parsers.ConstantTypeString,
-										Value: "123",
-									},
-								},
-								parsers.SelectItem{
-									Type: parsers.SelectItemTypeConstant,
-									Value: parsers.Constant{
-										Type:  parsers.ConstantTypeBoolean,
-										Value: true,
 							},
 						},
 					},
 				},
-					},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
-				},
-				Table: parsers.Table{Value: "c"},
 			},
 		)
 	})
@@ -61,19 +50,13 @@ func Test_Execute_StringFunctions(t *testing.T) {
 									Path: []string{"c", "id"},
 									Type: parsers.SelectItemTypeField,
 								},
-								parsers.SelectItem{
+								testutils.SelectItem_Constant_String("123"),
-									Type: parsers.SelectItemTypeConstant,
-									Value: parsers.Constant{
-										Type:  parsers.ConstantTypeString,
-										Value: "123",
-									},
-								},
 								nil,
 							},
 						},
 					},
 				},
-				Table: parsers.Table{Value: "c"},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
 			},
 		)
 	})
@@ -93,13 +76,7 @@ func Test_Execute_StringFunctions(t *testing.T) {
 									Path: []string{"c", "id"},
 									Type: parsers.SelectItemTypeField,
 								},
-								parsers.SelectItem{
+								testutils.SelectItem_Constant_String("123"),
-									Type: parsers.SelectItemTypeConstant,
-									Value: parsers.Constant{
-										Type:  parsers.ConstantTypeString,
-										Value: "123",
-									},
-								},
 								parsers.SelectItem{
 									Path: []string{"c", "pk"},
 									Type: parsers.SelectItemTypeField,
@@ -108,7 +85,7 @@ func Test_Execute_StringFunctions(t *testing.T) {
 						},
 					},
 				},
-				Table: parsers.Table{Value: "c"},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
 			},
 		)
 	})
@@ -128,25 +105,13 @@ func Test_Execute_StringFunctions(t *testing.T) {
 									Path: []string{"c", "id"},
 									Type: parsers.SelectItemTypeField,
 								},
-								parsers.SelectItem{
+								testutils.SelectItem_Constant_String("123"),
-									Type: parsers.SelectItemTypeConstant,
+								testutils.SelectItem_Constant_Bool(true),
-									Value: parsers.Constant{
-										Type:  parsers.ConstantTypeString,
-										Value: "123",
-									},
-								},
-								parsers.SelectItem{
-									Type: parsers.SelectItemTypeConstant,
-									Value: parsers.Constant{
-										Type:  parsers.ConstantTypeBoolean,
-										Value: true,
 							},
 						},
 					},
 				},
-					},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
-				},
-				Table: parsers.Table{Value: "c"},
 			},
 		)
 	})
@@ -166,25 +131,13 @@ func Test_Execute_StringFunctions(t *testing.T) {
 									Path: []string{"c", "id"},
 									Type: parsers.SelectItemTypeField,
 								},
-								parsers.SelectItem{
+								testutils.SelectItem_Constant_String("123"),
-									Type: parsers.SelectItemTypeConstant,
+								testutils.SelectItem_Constant_Bool(true),
-									Value: parsers.Constant{
-										Type:  parsers.ConstantTypeString,
-										Value: "123",
-									},
-								},
-								parsers.SelectItem{
-									Type: parsers.SelectItemTypeConstant,
-									Value: parsers.Constant{
-										Type:  parsers.ConstantTypeBoolean,
-										Value: true,
 							},
 						},
 					},
 				},
-					},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
-				},
-				Table: parsers.Table{Value: "c"},
 			},
 		)
 	})
@@ -204,25 +157,13 @@ func Test_Execute_StringFunctions(t *testing.T) {
 									Path: []string{"c", "id"},
 									Type: parsers.SelectItemTypeField,
 								},
-								parsers.SelectItem{
+								testutils.SelectItem_Constant_String("123"),
-									Type: parsers.SelectItemTypeConstant,
+								testutils.SelectItem_Constant_Bool(true),
-									Value: parsers.Constant{
-										Type:  parsers.ConstantTypeString,
-										Value: "123",
-									},
-								},
-								parsers.SelectItem{
-									Type: parsers.SelectItemTypeConstant,
-									Value: parsers.Constant{
-										Type:  parsers.ConstantTypeBoolean,
-										Value: true,
 							},
 						},
 					},
 				},
-					},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
-				},
-				Table: parsers.Table{Value: "c"},
 			},
 		)
 	})
@@ -242,25 +183,13 @@ func Test_Execute_StringFunctions(t *testing.T) {
 									Path: []string{"c", "id"},
 									Type: parsers.SelectItemTypeField,
 								},
-								parsers.SelectItem{
+								testutils.SelectItem_Constant_String("2"),
-									Type: parsers.SelectItemTypeConstant,
+								testutils.SelectItem_Constant_Int(1),
-									Value: parsers.Constant{
-										Type:  parsers.ConstantTypeString,
-										Value: "2",
-									},
-								},
-								parsers.SelectItem{
-									Type: parsers.SelectItemTypeConstant,
-									Value: parsers.Constant{
-										Type:  parsers.ConstantTypeInteger,
-										Value: 1,
 							},
 						},
 					},
 				},
-					},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
-				},
-				Table: parsers.Table{Value: "c"},
 			},
 		)
 	})
@@ -284,7 +213,7 @@ func Test_Execute_StringFunctions(t *testing.T) {
 						},
 					},
 				},
-				Table: parsers.Table{Value: "c"},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
 			},
 		)
 	})
@@ -308,7 +237,7 @@ func Test_Execute_StringFunctions(t *testing.T) {
 						},
 					},
 				},
-				Table: parsers.Table{Value: "c"},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
 			},
 		)
 	})
@@ -332,7 +261,7 @@ func Test_Execute_StringFunctions(t *testing.T) {
 						},
 					},
 				},
-				Table: parsers.Table{Value: "c"},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
 			},
 		)
 	})
@@ -352,18 +281,12 @@ func Test_Execute_StringFunctions(t *testing.T) {
 									Path: []string{"c", "id"},
 									Type: parsers.SelectItemTypeField,
 								},
-								parsers.SelectItem{
+								testutils.SelectItem_Constant_Int(5),
-									Type: parsers.SelectItemTypeConstant,
-									Value: parsers.Constant{
-										Type:  parsers.ConstantTypeInteger,
-										Value: 5,
 							},
 						},
 					},
 				},
-					},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
-				},
-				Table: parsers.Table{Value: "c"},
 			},
 		)
 	})
@@ -387,7 +310,7 @@ func Test_Execute_StringFunctions(t *testing.T) {
 						},
 					},
 				},
-				Table: parsers.Table{Value: "c"},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
 			},
 		)
 	})
@@ -411,7 +334,7 @@ func Test_Execute_StringFunctions(t *testing.T) {
 						},
 					},
 				},
-				Table: parsers.Table{Value: "c"},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
 			},
 		)
 	})
@@ -431,25 +354,13 @@ func Test_Execute_StringFunctions(t *testing.T) {
 									Path: []string{"c", "id"},
 									Type: parsers.SelectItemTypeField,
 								},
-								parsers.SelectItem{
+								testutils.SelectItem_Constant_String("old"),
-									Type: parsers.SelectItemTypeConstant,
+								testutils.SelectItem_Constant_String("new"),
-									Value: parsers.Constant{
-										Type:  parsers.ConstantTypeString,
-										Value: "old",
-									},
-								},
-								parsers.SelectItem{
-									Type: parsers.SelectItemTypeConstant,
-									Value: parsers.Constant{
-										Type:  parsers.ConstantTypeString,
-										Value: "new",
 							},
 						},
 					},
 				},
-					},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
-				},
-				Table: parsers.Table{Value: "c"},
 			},
 		)
 	})
@@ -469,18 +380,12 @@ func Test_Execute_StringFunctions(t *testing.T) {
 									Path: []string{"c", "id"},
 									Type: parsers.SelectItemTypeField,
 								},
-								parsers.SelectItem{
+								testutils.SelectItem_Constant_Int(3),
-									Type: parsers.SelectItemTypeConstant,
-									Value: parsers.Constant{
-										Type:  parsers.ConstantTypeInteger,
-										Value: 3,
 							},
 						},
 					},
 				},
-					},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
-				},
-				Table: parsers.Table{Value: "c"},
 			},
 		)
 	})
@@ -504,7 +409,7 @@ func Test_Execute_StringFunctions(t *testing.T) {
 						},
 					},
 				},
-				Table: parsers.Table{Value: "c"},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
 			},
 		)
 	})
@@ -524,18 +429,12 @@ func Test_Execute_StringFunctions(t *testing.T) {
 									Path: []string{"c", "id"},
 									Type: parsers.SelectItemTypeField,
 								},
-								parsers.SelectItem{
+								testutils.SelectItem_Constant_Int(3),
-									Type: parsers.SelectItemTypeConstant,
-									Value: parsers.Constant{
-										Type:  parsers.ConstantTypeInteger,
-										Value: 3,
 							},
 						},
 					},
 				},
-					},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
-				},
-				Table: parsers.Table{Value: "c"},
 			},
 		)
 	})
@@ -559,7 +458,7 @@ func Test_Execute_StringFunctions(t *testing.T) {
 						},
 					},
 				},
-				Table: parsers.Table{Value: "c"},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
 			},
 		)
 	})
@@ -579,25 +478,13 @@ func Test_Execute_StringFunctions(t *testing.T) {
 									Path: []string{"c", "id"},
 									Type: parsers.SelectItemTypeField,
 								},
-								parsers.SelectItem{
+								testutils.SelectItem_Constant_Int(1),
-									Type: parsers.SelectItemTypeConstant,
+								testutils.SelectItem_Constant_Int(5),
-									Value: parsers.Constant{
-										Type:  parsers.ConstantTypeInteger,
-										Value: 1,
-									},
-								},
-								parsers.SelectItem{
-									Type: parsers.SelectItemTypeConstant,
-									Value: parsers.Constant{
-										Type:  parsers.ConstantTypeInteger,
-										Value: 5,
 							},
 						},
 					},
 				},
-					},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
-				},
-				Table: parsers.Table{Value: "c"},
 			},
 		)
 	})
@@ -621,7 +508,7 @@ func Test_Execute_StringFunctions(t *testing.T) {
 						},
 					},
 				},
-				Table: parsers.Table{Value: "c"},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
 			},
 		)
 	})

parsers/nosql/subquery_test.go

@@ -4,6 +4,7 @@ import (
 	"testing"
 
 	"github.com/pikami/cosmium/parsers"
+	testutils "github.com/pikami/cosmium/test_utils"
 )
 
 func Test_Parse_SubQuery(t *testing.T) {
@@ -22,7 +23,7 @@ func Test_Parse_SubQuery(t *testing.T) {
 						Alias: "c",
 						Type:  parsers.SelectItemTypeSubQuery,
 						Value: parsers.SelectStmt{
-							Table: parsers.Table{Value: "cc"},
+							Table: parsers.Table{SelectItem: testutils.SelectItem_Path("cc")},
 							SelectItems: []parsers.SelectItem{
 								{Path: []string{"cc", "info"}, IsTopLevel: true},
 							},
@@ -42,9 +43,7 @@ func Test_Parse_SubQuery(t *testing.T) {
 					{Path: []string{"c", "id"}},
 					{Path: []string{"cc", "name"}},
 				},
-				Table: parsers.Table{
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
-					Value: "c",
-				},
 				JoinItems: []parsers.JoinItem{
 					{
 						Table: parsers.Table{
@@ -55,13 +54,12 @@ func Test_Parse_SubQuery(t *testing.T) {
 							Type:  parsers.SelectItemTypeSubQuery,
 							Value: parsers.SelectStmt{
 								SelectItems: []parsers.SelectItem{
-									{Path: []string{"tag", "name"}},
+									testutils.SelectItem_Path("tag", "name"),
 								},
 								Table: parsers.Table{
 									Value:      "tag",
-									SelectItem: parsers.SelectItem{
+									SelectItem: testutils.SelectItem_Path("c", "tags"),
-										Path: []string{"c", "tags"},
+									IsInSelect: true,
-									},
 								},
 							},
 						},
@@ -82,10 +80,10 @@ func Test_Parse_SubQuery(t *testing.T) {
 			WHERE hasTags`,
 			parsers.SelectStmt{
 				SelectItems: []parsers.SelectItem{
-					{Path: []string{"c", "id"}},
+					testutils.SelectItem_Path("c", "id"),
 				},
 				Table: parsers.Table{
-					Value: "c",
+					SelectItem: testutils.SelectItem_Path("c"),
 				},
 				JoinItems: []parsers.JoinItem{
 					{
@@ -100,13 +98,12 @@ func Test_Parse_SubQuery(t *testing.T) {
 										Type:       parsers.SelectItemTypeSubQuery,
 										Value: parsers.SelectStmt{
 											SelectItems: []parsers.SelectItem{
-												{Path: []string{"tag", "name"}},
+												testutils.SelectItem_Path("tag", "name"),
 											},
 											Table: parsers.Table{
 												Value:      "tag",
-												SelectItem: parsers.SelectItem{
+												SelectItem: testutils.SelectItem_Path("c", "tags"),
-													Path: []string{"c", "tags"},
+												IsInSelect: true,
-												},
 											},
 											Exists: true,
 										},

parsers/nosql/type_checking_functions_test.go

@@ -4,6 +4,7 @@ import (
 	"testing"
 
 	"github.com/pikami/cosmium/parsers"
+	testutils "github.com/pikami/cosmium/test_utils"
 )
 
 func Test_Execute_TypeCheckingFunctions(t *testing.T) {
@@ -27,7 +28,7 @@ func Test_Execute_TypeCheckingFunctions(t *testing.T) {
 						},
 					},
 				},
-				Table: parsers.Table{Value: "c"},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
 				Filters: parsers.SelectItem{
 					Type: parsers.SelectItemTypeFunctionCall,
 					Value: parsers.FunctionCall{
@@ -63,7 +64,7 @@ func Test_Execute_TypeCheckingFunctions(t *testing.T) {
 						},
 					},
 				},
-				Table: parsers.Table{Value: "c"},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
 				Filters: parsers.SelectItem{
 					Type: parsers.SelectItemTypeFunctionCall,
 					Value: parsers.FunctionCall{
@@ -99,7 +100,7 @@ func Test_Execute_TypeCheckingFunctions(t *testing.T) {
 						},
 					},
 				},
-				Table: parsers.Table{Value: "c"},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
 				Filters: parsers.SelectItem{
 					Type: parsers.SelectItemTypeFunctionCall,
 					Value: parsers.FunctionCall{
@@ -135,7 +136,7 @@ func Test_Execute_TypeCheckingFunctions(t *testing.T) {
 						},
 					},
 				},
-				Table: parsers.Table{Value: "c"},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
 				Filters: parsers.SelectItem{
 					Type: parsers.SelectItemTypeFunctionCall,
 					Value: parsers.FunctionCall{
@@ -171,7 +172,7 @@ func Test_Execute_TypeCheckingFunctions(t *testing.T) {
 						},
 					},
 				},
-				Table: parsers.Table{Value: "c"},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
 				Filters: parsers.SelectItem{
 					Type: parsers.SelectItemTypeFunctionCall,
 					Value: parsers.FunctionCall{
@@ -207,7 +208,7 @@ func Test_Execute_TypeCheckingFunctions(t *testing.T) {
 						},
 					},
 				},
-				Table: parsers.Table{Value: "c"},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
 				Filters: parsers.SelectItem{
 					Type: parsers.SelectItemTypeFunctionCall,
 					Value: parsers.FunctionCall{
@@ -243,7 +244,7 @@ func Test_Execute_TypeCheckingFunctions(t *testing.T) {
 						},
 					},
 				},
-				Table: parsers.Table{Value: "c"},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
 				Filters: parsers.SelectItem{
 					Type: parsers.SelectItemTypeFunctionCall,
 					Value: parsers.FunctionCall{
@@ -279,7 +280,7 @@ func Test_Execute_TypeCheckingFunctions(t *testing.T) {
 						},
 					},
 				},
-				Table: parsers.Table{Value: "c"},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
 				Filters: parsers.SelectItem{
 					Type: parsers.SelectItemTypeFunctionCall,
 					Value: parsers.FunctionCall{
@@ -315,7 +316,7 @@ func Test_Execute_TypeCheckingFunctions(t *testing.T) {
 						},
 					},
 				},
-				Table: parsers.Table{Value: "c"},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
 				Filters: parsers.SelectItem{
 					Type: parsers.SelectItemTypeFunctionCall,
 					Value: parsers.FunctionCall{
@@ -351,7 +352,7 @@ func Test_Execute_TypeCheckingFunctions(t *testing.T) {
 						},
 					},
 				},
-				Table: parsers.Table{Value: "c"},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
 				Filters: parsers.SelectItem{
 					Type: parsers.SelectItemTypeFunctionCall,
 					Value: parsers.FunctionCall{

parsers/nosql/were_test.go

@@ -4,6 +4,7 @@ import (
 	"testing"
 
 	"github.com/pikami/cosmium/parsers"
+	testutils "github.com/pikami/cosmium/test_utils"
 )
 
 func Test_Parse_Were(t *testing.T) {
@@ -18,14 +19,11 @@ func Test_Parse_Were(t *testing.T) {
 				SelectItems: []parsers.SelectItem{
 					{Path: []string{"c", "id"}},
 				},
-				Table: parsers.Table{Value: "c"},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
 				Filters: parsers.ComparisonExpression{
 					Operation: "=",
 					Left:      parsers.SelectItem{Path: []string{"c", "isCool"}},
-					Right: parsers.SelectItem{
+					Right:     testutils.SelectItem_Constant_Bool(true),
-						Type:  parsers.SelectItemTypeConstant,
-						Value: parsers.Constant{Type: parsers.ConstantTypeBoolean, Value: true},
-					},
 				},
 			},
 		)
@@ -44,25 +42,19 @@ func Test_Parse_Were(t *testing.T) {
 					{Path: []string{"c", "_rid"}},
 					{Path: []string{"c", "_ts"}},
 				},
-				Table: parsers.Table{Value: "c"},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
 				Filters: parsers.LogicalExpression{
 					Operation: parsers.LogicalExpressionTypeOr,
 					Expressions: []interface{}{
 						parsers.ComparisonExpression{
 							Operation: "=",
 							Left:      parsers.SelectItem{Path: []string{"c", "id"}},
-							Right: parsers.SelectItem{
+							Right:     testutils.SelectItem_Constant_String("12345"),
-								Type:  parsers.SelectItemTypeConstant,
-								Value: parsers.Constant{Type: parsers.ConstantTypeString, Value: "12345"},
-							},
 						},
 						parsers.ComparisonExpression{
 							Operation: "=",
 							Left:      parsers.SelectItem{Path: []string{"c", "pk"}},
-							Right: parsers.SelectItem{
+							Right:     testutils.SelectItem_Constant_Int(123),
-								Type:  parsers.SelectItemTypeConstant,
-								Value: parsers.Constant{Type: parsers.ConstantTypeInteger, Value: 123},
-							},
 						},
 					},
 				},
@@ -75,22 +67,19 @@ func Test_Parse_Were(t *testing.T) {
 			t,
 			`select c.id
 		FROM c
-		WHERE c.isCool=true AND (c.id = "123" OR c.id = "456")`,
+		WHERE c.isCool=true AND (c.id = "123" OR c.id <= "456")`,
 			parsers.SelectStmt{
 				SelectItems: []parsers.SelectItem{
 					{Path: []string{"c", "id"}},
 				},
-				Table: parsers.Table{Value: "c"},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
 				Filters: parsers.LogicalExpression{
 					Operation: parsers.LogicalExpressionTypeAnd,
 					Expressions: []interface{}{
 						parsers.ComparisonExpression{
 							Operation: "=",
 							Left:      parsers.SelectItem{Path: []string{"c", "isCool"}},
-							Right: parsers.SelectItem{
+							Right:     testutils.SelectItem_Constant_Bool(true),
-								Type:  parsers.SelectItemTypeConstant,
-								Value: parsers.Constant{Type: parsers.ConstantTypeBoolean, Value: true},
-							},
 						},
 						parsers.LogicalExpression{
 							Operation: parsers.LogicalExpressionTypeOr,
@@ -98,18 +87,12 @@ func Test_Parse_Were(t *testing.T) {
 								parsers.ComparisonExpression{
 									Operation: "=",
 									Left:      parsers.SelectItem{Path: []string{"c", "id"}},
-									Right: parsers.SelectItem{
+									Right:     testutils.SelectItem_Constant_String("123"),
-										Type:  parsers.SelectItemTypeConstant,
-										Value: parsers.Constant{Type: parsers.ConstantTypeString, Value: "123"},
-									},
 								},
 								parsers.ComparisonExpression{
-									Operation: "=",
+									Operation: "<=",
 									Left:      parsers.SelectItem{Path: []string{"c", "id"}},
-									Right: parsers.SelectItem{
+									Right:     testutils.SelectItem_Constant_String("456"),
-										Type:  parsers.SelectItemTypeConstant,
-										Value: parsers.Constant{Type: parsers.ConstantTypeString, Value: "456"},
-									},
 								},
 							},
 						},
@@ -131,47 +114,32 @@ func Test_Parse_Were(t *testing.T) {
 			AND c.param=@param_id1`,
 			parsers.SelectStmt{
 				SelectItems: []parsers.SelectItem{{Path: []string{"c", "id"}, Alias: ""}},
-				Table:       parsers.Table{Value: "c"},
+				Table:       parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
 				Filters: parsers.LogicalExpression{
 					Expressions: []interface{}{
 						parsers.ComparisonExpression{
 							Left:      parsers.SelectItem{Path: []string{"c", "boolean"}},
-							Right: parsers.SelectItem{
+							Right:     testutils.SelectItem_Constant_Bool(true),
-								Type:  parsers.SelectItemTypeConstant,
-								Value: parsers.Constant{Type: parsers.ConstantTypeBoolean, Value: true},
-							},
 							Operation: "=",
 						},
 						parsers.ComparisonExpression{
 							Left:      parsers.SelectItem{Path: []string{"c", "integer"}},
-							Right: parsers.SelectItem{
+							Right:     testutils.SelectItem_Constant_Int(1),
-								Type:  parsers.SelectItemTypeConstant,
-								Value: parsers.Constant{Type: parsers.ConstantTypeInteger, Value: 1},
-							},
 							Operation: "=",
 						},
 						parsers.ComparisonExpression{
 							Left:      parsers.SelectItem{Path: []string{"c", "float"}},
-							Right: parsers.SelectItem{
+							Right:     testutils.SelectItem_Constant_Float(6.9),
-								Type:  parsers.SelectItemTypeConstant,
-								Value: parsers.Constant{Type: parsers.ConstantTypeFloat, Value: 6.9},
-							},
 							Operation: "=",
 						},
 						parsers.ComparisonExpression{
 							Left:      parsers.SelectItem{Path: []string{"c", "string"}},
-							Right: parsers.SelectItem{
+							Right:     testutils.SelectItem_Constant_String("hello"),
-								Type:  parsers.SelectItemTypeConstant,
-								Value: parsers.Constant{Type: parsers.ConstantTypeString, Value: "hello"},
-							},
 							Operation: "=",
 						},
 						parsers.ComparisonExpression{
 							Left:      parsers.SelectItem{Path: []string{"c", "param"}},
-							Right: parsers.SelectItem{
+							Right:     testutils.SelectItem_Constant_Parameter("@param_id1"),
-								Type:  parsers.SelectItemTypeConstant,
-								Value: parsers.Constant{Type: parsers.ConstantTypeParameterConstant, Value: "@param_id1"},
-							},
 							Operation: "=",
 						},
 					},
@@ -180,4 +148,21 @@ func Test_Parse_Were(t *testing.T) {
 			},
 		)
 	})
+
+	t.Run("Should correctly parse NOT conditions", func(t *testing.T) {
+		testQueryParse(
+			t,
+			`select c.id
+		FROM c
+		WHERE NOT c.boolean`,
+			parsers.SelectStmt{
+				SelectItems: []parsers.SelectItem{{Path: []string{"c", "id"}, Alias: ""}},
+				Table:       parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
+				Filters: parsers.SelectItem{
+					Path:   []string{"c", "boolean"},
+					Invert: true,
+				},
+			},
+		)
+	})
 }

query_executors/memory_executor/aggregate_functions_test.go

@@ -5,6 +5,7 @@ import (
 
 	"github.com/pikami/cosmium/parsers"
 	memoryexecutor "github.com/pikami/cosmium/query_executors/memory_executor"
+	testutils "github.com/pikami/cosmium/test_utils"
 )
 
 func Test_Execute_AggregateFunctions(t *testing.T) {
@@ -38,7 +39,7 @@ func Test_Execute_AggregateFunctions(t *testing.T) {
 				GroupBy: []parsers.SelectItem{
 					{Path: []string{"c", "key"}},
 				},
-				Table: parsers.Table{Value: "c"},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
 			},
 			mockData,
 			[]memoryexecutor.RowType{
@@ -67,7 +68,7 @@ func Test_Execute_AggregateFunctions(t *testing.T) {
 						},
 					},
 				},
-				Table: parsers.Table{Value: "c"},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
 			},
 			mockData,
 			[]memoryexecutor.RowType{
@@ -99,7 +100,7 @@ func Test_Execute_AggregateFunctions(t *testing.T) {
 				GroupBy: []parsers.SelectItem{
 					{Path: []string{"c", "key"}},
 				},
-				Table: parsers.Table{Value: "c"},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
 			},
 			mockData,
 			[]memoryexecutor.RowType{
@@ -132,7 +133,7 @@ func Test_Execute_AggregateFunctions(t *testing.T) {
 				GroupBy: []parsers.SelectItem{
 					{Path: []string{"c", "key"}},
 				},
-				Table: parsers.Table{Value: "c"},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
 			},
 			mockData,
 			[]memoryexecutor.RowType{
@@ -165,7 +166,7 @@ func Test_Execute_AggregateFunctions(t *testing.T) {
 				GroupBy: []parsers.SelectItem{
 					{Path: []string{"c", "key"}},
 				},
-				Table: parsers.Table{Value: "c"},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
 			},
 			mockData,
 			[]memoryexecutor.RowType{
@@ -198,7 +199,7 @@ func Test_Execute_AggregateFunctions(t *testing.T) {
 				GroupBy: []parsers.SelectItem{
 					{Path: []string{"c", "key"}},
 				},
-				Table: parsers.Table{Value: "c"},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
 			},
 			mockData,
 			[]memoryexecutor.RowType{

query_executors/memory_executor/arithmetics_test.go

@@ -0,0 +1,91 @@
+package memoryexecutor_test
+
+import (
+	"testing"
+
+	"github.com/pikami/cosmium/parsers"
+	memoryexecutor "github.com/pikami/cosmium/query_executors/memory_executor"
+	testutils "github.com/pikami/cosmium/test_utils"
+)
+
+func Test_Execute_Arithmetics(t *testing.T) {
+	mockData := []memoryexecutor.RowType{
+		map[string]interface{}{"id": 1, "a": 420},
+		map[string]interface{}{"id": 2, "a": 6.9},
+		map[string]interface{}{"id": 3},
+	}
+
+	t.Run("Should execute simple arithmetics", func(t *testing.T) {
+		testQueryExecute(
+			t,
+			parsers.SelectStmt{
+				SelectItems: []parsers.SelectItem{
+					{
+						Path: []string{"c", "id"},
+						Type: parsers.SelectItemTypeField,
+					},
+					{
+						Type:  parsers.SelectItemTypeBinaryExpression,
+						Alias: "result",
+						Value: parsers.BinaryExpression{
+							Operation: "+",
+							Left:      testutils.SelectItem_Path("c", "a"),
+							Right: parsers.SelectItem{
+								Type: parsers.SelectItemTypeBinaryExpression,
+								Value: parsers.BinaryExpression{
+									Operation: "*",
+									Left:      testutils.SelectItem_Constant_Float(2.0),
+									Right:     testutils.SelectItem_Constant_Int(3),
+								},
+							},
+						},
+					},
+				},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
+			},
+			mockData,
+			[]memoryexecutor.RowType{
+				map[string]interface{}{"id": 1, "result": 426.0},
+				map[string]interface{}{"id": 2, "result": 12.9},
+				map[string]interface{}{"id": 3, "result": nil},
+			},
+		)
+	})
+
+	t.Run("Should execute arithmetics in WHERE clause", func(t *testing.T) {
+		testQueryExecute(
+			t,
+			parsers.SelectStmt{
+				SelectItems: []parsers.SelectItem{
+					testutils.SelectItem_Path("c", "id"),
+					{
+						Alias: "result",
+						Type:  parsers.SelectItemTypeBinaryExpression,
+						Value: parsers.BinaryExpression{
+							Operation: "*",
+							Left:      testutils.SelectItem_Path("c", "a"),
+							Right:     testutils.SelectItem_Constant_Int(2),
+						},
+					},
+				},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
+				Filters: parsers.ComparisonExpression{
+					Operation: ">",
+					Left: parsers.SelectItem{
+						Type: parsers.SelectItemTypeBinaryExpression,
+						Value: parsers.BinaryExpression{
+							Operation: "*",
+							Left:      testutils.SelectItem_Path("c", "a"),
+							Right:     testutils.SelectItem_Constant_Int(2),
+						},
+					},
+					Right: testutils.SelectItem_Constant_Int(500),
+				},
+			},
+			mockData,
+			[]memoryexecutor.RowType{
+				map[string]interface{}{"id": 1, "result": 840.0},
+			},
+		)
+	})
+}

query_executors/memory_executor/array_functions.go

@@ -16,6 +16,86 @@ func (r rowContext) array_Concat(arguments []interface{}) []interface{} {
 	return result
 }
 
+func (r rowContext) array_Contains(arguments []interface{}) bool {
+	array := r.parseArray(arguments[0])
+	if array == nil {
+		return false
+	}
+
+	exprToSearch := r.resolveSelectItem(arguments[1].(parsers.SelectItem))
+
+	partialSearch := false
+	if len(arguments) > 2 {
+		boolExpr := r.resolveSelectItem(arguments[2].(parsers.SelectItem))
+		if boolValue, ok := boolExpr.(bool); ok {
+			partialSearch = boolValue
+		} else {
+			logger.ErrorLn("array_Contains - got parameters of wrong type")
+			return false
+		}
+	}
+
+	for _, item := range array {
+		if partialSearch {
+			if r.partialMatch(item, exprToSearch) {
+				return true
+			}
+		} else {
+			if reflect.DeepEqual(item, exprToSearch) {
+				return true
+			}
+		}
+	}
+
+	return false
+}
+
+func (r rowContext) array_Contains_Any(arguments []interface{}) bool {
+	array := r.parseArray(arguments[0])
+	if array == nil {
+		return false
+	}
+
+	valueSelectItems := arguments[1:]
+
+	for _, valueSelectItem := range valueSelectItems {
+		value := r.resolveSelectItem(valueSelectItem.(parsers.SelectItem))
+		for _, item := range array {
+			if reflect.DeepEqual(item, value) {
+				return true
+			}
+		}
+	}
+
+	return false
+}
+
+func (r rowContext) array_Contains_All(arguments []interface{}) bool {
+	array := r.parseArray(arguments[0])
+	if array == nil {
+		return false
+	}
+
+	valueSelectItems := arguments[1:]
+
+	for _, valueSelectItem := range valueSelectItems {
+		value := r.resolveSelectItem(valueSelectItem.(parsers.SelectItem))
+
+		found := false
+		for _, item := range array {
+			if reflect.DeepEqual(item, value) {
+				found = true
+				break
+			}
+		}
+		if !found {
+			return false
+		}
+	}
+
+	return true
+}
+
 func (r rowContext) array_Length(arguments []interface{}) int {
 	array := r.parseArray(arguments[0])
 	if array == nil {
@@ -36,13 +116,13 @@ func (r rowContext) array_Slice(arguments []interface{}) []interface{} {
 		lengthEx := r.resolveSelectItem(arguments[2].(parsers.SelectItem))
 
 		if length, ok = lengthEx.(int); !ok {
-			logger.Error("array_Slice - got length parameters of wrong type")
+			logger.ErrorLn("array_Slice - got length parameters of wrong type")
 			return []interface{}{}
 		}
 	}
 
 	if start, ok = startEx.(int); !ok {
-		logger.Error("array_Slice - got start parameters of wrong type")
+		logger.ErrorLn("array_Slice - got start parameters of wrong type")
 		return []interface{}{}
 	}
 
@@ -116,8 +196,12 @@ func (r rowContext) parseArray(argument interface{}) []interface{} {
 	ex := r.resolveSelectItem(exItem)
 
 	arrValue := reflect.ValueOf(ex)
+	if arrValue.Kind() == reflect.Invalid {
+		return nil
+	}
+
 	if arrValue.Kind() != reflect.Slice {
-		logger.Error("parseArray got parameters of wrong type")
+		logger.ErrorLn("parseArray got parameters of wrong type")
 		return nil
 	}
 
@@ -129,3 +213,21 @@ func (r rowContext) parseArray(argument interface{}) []interface{} {
 
 	return result
 }
+
+func (r rowContext) partialMatch(item interface{}, exprToSearch interface{}) bool {
+	itemValue := reflect.ValueOf(item)
+	exprValue := reflect.ValueOf(exprToSearch)
+
+	if itemValue.Kind() != reflect.Map || exprValue.Kind() != reflect.Map {
+		logger.ErrorLn("partialMatch got parameters of wrong type")
+		return false
+	}
+
+	for _, key := range exprValue.MapKeys() {
+		if !reflect.DeepEqual(itemValue.MapIndex(key).Interface(), exprValue.MapIndex(key).Interface()) {
+			return false
+		}
+	}
+
+	return true
+}

query_executors/memory_executor/array_functions_test.go

@@ -5,6 +5,7 @@ import (
 
 	"github.com/pikami/cosmium/parsers"
 	memoryexecutor "github.com/pikami/cosmium/query_executors/memory_executor"
+	testutils "github.com/pikami/cosmium/test_utils"
 )
 
 func Test_Execute_ArrayFunctions(t *testing.T) {
@@ -41,7 +42,7 @@ func Test_Execute_ArrayFunctions(t *testing.T) {
 						},
 					},
 				},
-				Table: parsers.Table{Value: "c"},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
 			},
 			mockData,
 			[]memoryexecutor.RowType{
@@ -52,6 +53,300 @@ func Test_Execute_ArrayFunctions(t *testing.T) {
 		)
 	})
 
+	t.Run("Should execute function ARRAY_CONTAINS()", func(t *testing.T) {
+		testQueryExecute(
+			t,
+			parsers.SelectStmt{
+				Parameters: map[string]interface{}{
+					"@categories":                []interface{}{"coats", "jackets", "sweatshirts"},
+					"@objectArray":               []interface{}{map[string]interface{}{"category": "shirts", "color": "blue", "nestedObject": map[string]interface{}{"size": "M"}}},
+					"@fullMatchObject":           map[string]interface{}{"category": "shirts", "color": "blue", "nestedObject": map[string]interface{}{"size": "M"}},
+					"@partialMatchObject":        map[string]interface{}{"category": "shirts"},
+					"@missingPartialMatchObject": map[string]interface{}{"category": "shorts", "color": "blue"},
+					"@nestedPartialMatchObject":  map[string]interface{}{"nestedObject": map[string]interface{}{"size": "M"}},
+				},
+				SelectItems: []parsers.SelectItem{
+					{
+						Alias: "ContainsItem",
+						Type:  parsers.SelectItemTypeFunctionCall,
+						Value: parsers.FunctionCall{
+							Type: parsers.FunctionCallArrayContains,
+							Arguments: []interface{}{
+								testutils.SelectItem_Constant_Parameter("@categories"),
+								testutils.SelectItem_Constant_String("coats"),
+							},
+						},
+					},
+					{
+						Alias: "MissingItem",
+						Type:  parsers.SelectItemTypeFunctionCall,
+						Value: parsers.FunctionCall{
+							Type: parsers.FunctionCallArrayContains,
+							Arguments: []interface{}{
+								testutils.SelectItem_Constant_Parameter("@categories"),
+								testutils.SelectItem_Constant_String("hoodies"),
+							},
+						},
+					},
+					{
+						Alias: "ContainsFullMatchObject",
+						Type:  parsers.SelectItemTypeFunctionCall,
+						Value: parsers.FunctionCall{
+							Type: parsers.FunctionCallArrayContains,
+							Arguments: []interface{}{
+								testutils.SelectItem_Constant_Parameter("@objectArray"),
+								testutils.SelectItem_Constant_Parameter("@fullMatchObject"),
+							},
+						},
+					},
+					{
+						Alias: "MissingFullMatchObject",
+						Type:  parsers.SelectItemTypeFunctionCall,
+						Value: parsers.FunctionCall{
+							Type: parsers.FunctionCallArrayContains,
+							Arguments: []interface{}{
+								testutils.SelectItem_Constant_Parameter("@objectArray"),
+								testutils.SelectItem_Constant_Parameter("@partialMatchObject"),
+							},
+						},
+					},
+					{
+						Alias: "ContainsPartialMatchObject",
+						Type:  parsers.SelectItemTypeFunctionCall,
+						Value: parsers.FunctionCall{
+							Type: parsers.FunctionCallArrayContains,
+							Arguments: []interface{}{
+								testutils.SelectItem_Constant_Parameter("@objectArray"),
+								testutils.SelectItem_Constant_Parameter("@partialMatchObject"),
+								testutils.SelectItem_Constant_Bool(true),
+							},
+						},
+					},
+					{
+						Alias: "MissingPartialMatchObject",
+						Type:  parsers.SelectItemTypeFunctionCall,
+						Value: parsers.FunctionCall{
+							Type: parsers.FunctionCallArrayContains,
+							Arguments: []interface{}{
+								testutils.SelectItem_Constant_Parameter("@objectArray"),
+								testutils.SelectItem_Constant_Parameter("@missingPartialMatchObject"),
+								testutils.SelectItem_Constant_Bool(true),
+							},
+						},
+					},
+					{
+						Alias: "ContainsNestedPartialMatchObject",
+						Type:  parsers.SelectItemTypeFunctionCall,
+						Value: parsers.FunctionCall{
+							Type: parsers.FunctionCallArrayContains,
+							Arguments: []interface{}{
+								testutils.SelectItem_Constant_Parameter("@objectArray"),
+								testutils.SelectItem_Constant_Parameter("@nestedPartialMatchObject"),
+								testutils.SelectItem_Constant_Bool(true),
+							},
+						},
+					},
+				},
+			},
+			[]memoryexecutor.RowType{map[string]interface{}{"id": "123"}},
+			[]memoryexecutor.RowType{
+				map[string]interface{}{
+					"ContainsItem":                     true,
+					"MissingItem":                      false,
+					"ContainsFullMatchObject":          true,
+					"MissingFullMatchObject":           false,
+					"ContainsPartialMatchObject":       true,
+					"MissingPartialMatchObject":        false,
+					"ContainsNestedPartialMatchObject": true,
+				},
+			},
+		)
+	})
+
+	t.Run("Should execute function ARRAY_CONTAINS_ANY()", func(t *testing.T) {
+		testQueryExecute(
+			t,
+			parsers.SelectStmt{
+				Parameters: map[string]interface{}{
+					"@mixedArray": []interface{}{1, true, "3", []int{1, 2, 3}},
+					"@numbers":    []interface{}{1, 2, 3, 4},
+					"@emptyArray": []interface{}{},
+					"@arr123":     []interface{}{1, 2, 3},
+				},
+				SelectItems: []parsers.SelectItem{
+					{
+						Alias: "matchesEntireArray",
+						Type:  parsers.SelectItemTypeFunctionCall,
+						Value: parsers.FunctionCall{
+							Type: parsers.FunctionCallArrayContainsAny,
+							Arguments: []interface{}{
+								testutils.SelectItem_Constant_Parameter("@mixedArray"),
+								testutils.SelectItem_Constant_Int(1),
+								testutils.SelectItem_Constant_Bool(true),
+								testutils.SelectItem_Constant_String("3"),
+								testutils.SelectItem_Constant_Parameter("@arr123"),
+							},
+						},
+					},
+					{
+						Alias: "matchesSomeValues",
+						Type:  parsers.SelectItemTypeFunctionCall,
+						Value: parsers.FunctionCall{
+							Type: parsers.FunctionCallArrayContainsAny,
+							Arguments: []interface{}{
+								testutils.SelectItem_Constant_Parameter("@numbers"),
+								testutils.SelectItem_Constant_Int(2),
+								testutils.SelectItem_Constant_Int(3),
+								testutils.SelectItem_Constant_Int(4),
+								testutils.SelectItem_Constant_Int(5),
+							},
+						},
+					},
+					{
+						Alias: "matchSingleValue",
+						Type:  parsers.SelectItemTypeFunctionCall,
+						Value: parsers.FunctionCall{
+							Type: parsers.FunctionCallArrayContainsAny,
+							Arguments: []interface{}{
+								testutils.SelectItem_Constant_Parameter("@numbers"),
+								testutils.SelectItem_Constant_Int(1),
+							},
+						},
+					},
+					{
+						Alias: "noMatches",
+						Type:  parsers.SelectItemTypeFunctionCall,
+						Value: parsers.FunctionCall{
+							Type: parsers.FunctionCallArrayContainsAny,
+							Arguments: []interface{}{
+								testutils.SelectItem_Constant_Parameter("@numbers"),
+								testutils.SelectItem_Constant_Int(5),
+								testutils.SelectItem_Constant_Int(6),
+								testutils.SelectItem_Constant_Int(7),
+								testutils.SelectItem_Constant_Int(8),
+							},
+						},
+					},
+					{
+						Alias: "emptyArray",
+						Type:  parsers.SelectItemTypeFunctionCall,
+						Value: parsers.FunctionCall{
+							Type: parsers.FunctionCallArrayContainsAny,
+							Arguments: []interface{}{
+								testutils.SelectItem_Constant_Parameter("@emptyArray"),
+								testutils.SelectItem_Constant_Int(1),
+								testutils.SelectItem_Constant_Int(2),
+								testutils.SelectItem_Constant_Int(3),
+							},
+						},
+					},
+				},
+			},
+			[]memoryexecutor.RowType{map[string]interface{}{"id": "123"}},
+			[]memoryexecutor.RowType{
+				map[string]interface{}{
+					"matchesEntireArray": true,
+					"matchesSomeValues":  true,
+					"matchSingleValue":   true,
+					"noMatches":          false,
+					"emptyArray":         false,
+				},
+			},
+		)
+	})
+
+	t.Run("Should execute function ARRAY_CONTAINS_ALL()", func(t *testing.T) {
+		testQueryExecute(
+			t,
+			parsers.SelectStmt{
+				Parameters: map[string]interface{}{
+					"@mixedArray": []interface{}{1, true, "3", []interface{}{1, 2, 3}},
+					"@numbers":    []interface{}{1, 2, 3, 4},
+					"@emptyArray": []interface{}{},
+					"@arr123":     []interface{}{1, 2, 3},
+				},
+				SelectItems: []parsers.SelectItem{
+					{
+						Alias: "matchesEntireArray",
+						Type:  parsers.SelectItemTypeFunctionCall,
+						Value: parsers.FunctionCall{
+							Type: parsers.FunctionCallArrayContainsAll,
+							Arguments: []interface{}{
+								testutils.SelectItem_Constant_Parameter("@mixedArray"),
+								testutils.SelectItem_Constant_Int(1),
+								testutils.SelectItem_Constant_Bool(true),
+								testutils.SelectItem_Constant_String("3"),
+								testutils.SelectItem_Constant_Parameter("@arr123"),
+							},
+						},
+					},
+					{
+						Alias: "matchesSomeValues",
+						Type:  parsers.SelectItemTypeFunctionCall,
+						Value: parsers.FunctionCall{
+							Type: parsers.FunctionCallArrayContainsAll,
+							Arguments: []interface{}{
+								testutils.SelectItem_Constant_Parameter("@numbers"),
+								testutils.SelectItem_Constant_Int(2),
+								testutils.SelectItem_Constant_Int(3),
+								testutils.SelectItem_Constant_Int(4),
+								testutils.SelectItem_Constant_Int(5),
+							},
+						},
+					},
+					{
+						Alias: "matchSingleValue",
+						Type:  parsers.SelectItemTypeFunctionCall,
+						Value: parsers.FunctionCall{
+							Type: parsers.FunctionCallArrayContainsAll,
+							Arguments: []interface{}{
+								testutils.SelectItem_Constant_Parameter("@numbers"),
+								testutils.SelectItem_Constant_Int(1),
+							},
+						},
+					},
+					{
+						Alias: "noMatches",
+						Type:  parsers.SelectItemTypeFunctionCall,
+						Value: parsers.FunctionCall{
+							Type: parsers.FunctionCallArrayContainsAll,
+							Arguments: []interface{}{
+								testutils.SelectItem_Constant_Parameter("@numbers"),
+								testutils.SelectItem_Constant_Int(5),
+								testutils.SelectItem_Constant_Int(6),
+								testutils.SelectItem_Constant_Int(7),
+								testutils.SelectItem_Constant_Int(8),
+							},
+						},
+					},
+					{
+						Alias: "emptyArray",
+						Type:  parsers.SelectItemTypeFunctionCall,
+						Value: parsers.FunctionCall{
+							Type: parsers.FunctionCallArrayContainsAll,
+							Arguments: []interface{}{
+								testutils.SelectItem_Constant_Parameter("@emptyArray"),
+								testutils.SelectItem_Constant_Int(1),
+								testutils.SelectItem_Constant_Int(2),
+								testutils.SelectItem_Constant_Int(3),
+							},
+						},
+					},
+				},
+			},
+			[]memoryexecutor.RowType{map[string]interface{}{"id": "123"}},
+			[]memoryexecutor.RowType{
+				map[string]interface{}{
+					"matchesEntireArray": true,
+					"matchesSomeValues":  false,
+					"matchSingleValue":   true,
+					"noMatches":          false,
+					"emptyArray":         false,
+				},
+			},
+		)
+	})
+
 	t.Run("Should execute function ARRAY_LENGTH()", func(t *testing.T) {
 		testQueryExecute(
 			t,
@@ -75,7 +370,7 @@ func Test_Execute_ArrayFunctions(t *testing.T) {
 						},
 					},
 				},
-				Table: parsers.Table{Value: "c"},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
 			},
 			mockData,
 			[]memoryexecutor.RowType{
@@ -105,25 +400,13 @@ func Test_Execute_ArrayFunctions(t *testing.T) {
 									Path: []string{"c", "arr2"},
 									Type: parsers.SelectItemTypeField,
 								},
-								parsers.SelectItem{
+								testutils.SelectItem_Constant_Int(1),
-									Type: parsers.SelectItemTypeConstant,
+								testutils.SelectItem_Constant_Int(2),
-									Value: parsers.Constant{
-										Type:  parsers.ConstantTypeInteger,
-										Value: 1,
-									},
-								},
-								parsers.SelectItem{
-									Type: parsers.SelectItemTypeConstant,
-									Value: parsers.Constant{
-										Type:  parsers.ConstantTypeInteger,
-										Value: 2,
 							},
 						},
 					},
 				},
-					},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
-				},
-				Table: parsers.Table{Value: "c"},
 			},
 			mockData,
 			[]memoryexecutor.RowType{
@@ -161,7 +444,7 @@ func Test_Execute_ArrayFunctions(t *testing.T) {
 						},
 					},
 				},
-				Table: parsers.Table{Value: "c"},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
 			},
 			mockData,
 			[]memoryexecutor.RowType{
@@ -199,7 +482,7 @@ func Test_Execute_ArrayFunctions(t *testing.T) {
 						},
 					},
 				},
-				Table: parsers.Table{Value: "c"},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
 			},
 			mockData,
 			[]memoryexecutor.RowType{

query_executors/memory_executor/array_iterator.go

@@ -0,0 +1,27 @@
+package memoryexecutor
+
+import "github.com/pikami/cosmium/internal/datastore"
+
+type rowArrayIterator struct {
+	documents []rowContext
+	index     int
+}
+
+func NewRowArrayIterator(documents []rowContext) *rowArrayIterator {
+	return &rowArrayIterator{
+		documents: documents,
+		index:     -1,
+	}
+}
+
+func (i *rowArrayIterator) Next() (rowContext, datastore.DataStoreStatus) {
+	i.index++
+	if i.index >= len(i.documents) {
+		return rowContext{}, datastore.IterEOF
+	}
+
+	row := i.documents[i.index]
+	i.documents[i.index] = rowContext{} // Help GC reclaim memory
+
+	return row, datastore.StatusOk
+}

query_executors/memory_executor/common.go

@@ -0,0 +1,459 @@
+package memoryexecutor
+
+import (
+	"fmt"
+	"reflect"
+	"strconv"
+	"strings"
+
+	"github.com/pikami/cosmium/internal/datastore"
+	"github.com/pikami/cosmium/internal/logger"
+	"github.com/pikami/cosmium/parsers"
+)
+
+type RowType interface{}
+type rowContext struct {
+	tables       map[string]RowType
+	parameters   map[string]interface{}
+	grouppedRows []rowContext
+}
+
+type rowIterator interface {
+	Next() (rowContext, datastore.DataStoreStatus)
+}
+
+type rowTypeIterator interface {
+	Next() (RowType, datastore.DataStoreStatus)
+}
+
+func resolveDestinationColumnName(selectItem parsers.SelectItem, itemIndex int, queryParameters map[string]interface{}) string {
+	if selectItem.Alias != "" {
+		return selectItem.Alias
+	}
+
+	destinationName := fmt.Sprintf("$%d", itemIndex+1)
+	if len(selectItem.Path) > 0 {
+		destinationName = selectItem.Path[len(selectItem.Path)-1]
+	}
+
+	if destinationName[0] == '@' {
+		destinationName = queryParameters[destinationName].(string)
+	}
+
+	return destinationName
+}
+
+func (r rowContext) resolveSelectItem(selectItem parsers.SelectItem) interface{} {
+	if selectItem.Type == parsers.SelectItemTypeArray {
+		return r.selectItem_SelectItemTypeArray(selectItem)
+	}
+
+	if selectItem.Type == parsers.SelectItemTypeObject {
+		return r.selectItem_SelectItemTypeObject(selectItem)
+	}
+
+	if selectItem.Type == parsers.SelectItemTypeConstant {
+		return r.selectItem_SelectItemTypeConstant(selectItem)
+	}
+
+	if selectItem.Type == parsers.SelectItemTypeSubQuery {
+		return r.selectItem_SelectItemTypeSubQuery(selectItem)
+	}
+
+	if selectItem.Type == parsers.SelectItemTypeFunctionCall {
+		if typedFunctionCall, ok := selectItem.Value.(parsers.FunctionCall); ok {
+			return r.selectItem_SelectItemTypeFunctionCall(typedFunctionCall)
+		}
+
+		logger.ErrorLn("parsers.SelectItem has incorrect Value type (expected parsers.FunctionCall)")
+		return nil
+	}
+
+	if selectItem.Type == parsers.SelectItemTypeExpression {
+		if typedExpression, ok := selectItem.Value.(parsers.ComparisonExpression); ok {
+			return r.filters_ComparisonExpression(typedExpression)
+		}
+
+		if typedExpression, ok := selectItem.Value.(parsers.LogicalExpression); ok {
+			return r.filters_LogicalExpression(typedExpression)
+		}
+
+		logger.ErrorLn("parsers.SelectItem has incorrect Value type (expected parsers.ComparisonExpression)")
+		return nil
+	}
+
+	if selectItem.Type == parsers.SelectItemTypeBinaryExpression {
+		if typedSelectItem, ok := selectItem.Value.(parsers.BinaryExpression); ok {
+			return r.selectItem_SelectItemTypeBinaryExpression(typedSelectItem)
+		}
+
+		logger.ErrorLn("parsers.SelectItem has incorrect Value type (expected parsers.BinaryExpression)")
+		return nil
+	}
+
+	return r.selectItem_SelectItemTypeField(selectItem)
+}
+
+func (r rowContext) selectItem_SelectItemTypeArray(selectItem parsers.SelectItem) interface{} {
+	arrayValue := make([]interface{}, 0)
+	for _, subSelectItem := range selectItem.SelectItems {
+		arrayValue = append(arrayValue, r.resolveSelectItem(subSelectItem))
+	}
+	return arrayValue
+}
+
+func (r rowContext) selectItem_SelectItemTypeObject(selectItem parsers.SelectItem) interface{} {
+	objectValue := make(map[string]interface{})
+	for _, subSelectItem := range selectItem.SelectItems {
+		objectValue[subSelectItem.Alias] = r.resolveSelectItem(subSelectItem)
+	}
+	return objectValue
+}
+
+func (r rowContext) selectItem_SelectItemTypeConstant(selectItem parsers.SelectItem) interface{} {
+	var typedValue parsers.Constant
+	var ok bool
+	if typedValue, ok = selectItem.Value.(parsers.Constant); !ok {
+		// TODO: Handle error
+		logger.ErrorLn("parsers.Constant has incorrect Value type")
+	}
+
+	if typedValue.Type == parsers.ConstantTypeParameterConstant &&
+		r.parameters != nil {
+		if key, ok := typedValue.Value.(string); ok {
+			return r.parameters[key]
+		}
+	}
+
+	return typedValue.Value
+}
+
+func (r rowContext) selectItem_SelectItemTypeSubQuery(selectItem parsers.SelectItem) interface{} {
+	subQuery := selectItem.Value.(parsers.SelectStmt)
+	subQueryResult := executeQuery(
+		subQuery,
+		NewRowArrayIterator([]rowContext{r}),
+	)
+
+	if subQuery.Exists {
+		_, status := subQueryResult.Next()
+		return status == datastore.StatusOk
+	}
+
+	allDocuments := make([]RowType, 0)
+	for {
+		row, status := subQueryResult.Next()
+		if status != datastore.StatusOk {
+			break
+		}
+		allDocuments = append(allDocuments, row)
+	}
+
+	return allDocuments
+}
+
+func (r rowContext) selectItem_SelectItemTypeFunctionCall(functionCall parsers.FunctionCall) interface{} {
+	switch functionCall.Type {
+	case parsers.FunctionCallStringEquals:
+		return r.strings_StringEquals(functionCall.Arguments)
+	case parsers.FunctionCallContains:
+		return r.strings_Contains(functionCall.Arguments)
+	case parsers.FunctionCallEndsWith:
+		return r.strings_EndsWith(functionCall.Arguments)
+	case parsers.FunctionCallStartsWith:
+		return r.strings_StartsWith(functionCall.Arguments)
+	case parsers.FunctionCallConcat:
+		return r.strings_Concat(functionCall.Arguments)
+	case parsers.FunctionCallIndexOf:
+		return r.strings_IndexOf(functionCall.Arguments)
+	case parsers.FunctionCallToString:
+		return r.strings_ToString(functionCall.Arguments)
+	case parsers.FunctionCallUpper:
+		return r.strings_Upper(functionCall.Arguments)
+	case parsers.FunctionCallLower:
+		return r.strings_Lower(functionCall.Arguments)
+	case parsers.FunctionCallLeft:
+		return r.strings_Left(functionCall.Arguments)
+	case parsers.FunctionCallLength:
+		return r.strings_Length(functionCall.Arguments)
+	case parsers.FunctionCallLTrim:
+		return r.strings_LTrim(functionCall.Arguments)
+	case parsers.FunctionCallReplace:
+		return r.strings_Replace(functionCall.Arguments)
+	case parsers.FunctionCallReplicate:
+		return r.strings_Replicate(functionCall.Arguments)
+	case parsers.FunctionCallReverse:
+		return r.strings_Reverse(functionCall.Arguments)
+	case parsers.FunctionCallRight:
+		return r.strings_Right(functionCall.Arguments)
+	case parsers.FunctionCallRTrim:
+		return r.strings_RTrim(functionCall.Arguments)
+	case parsers.FunctionCallSubstring:
+		return r.strings_Substring(functionCall.Arguments)
+	case parsers.FunctionCallTrim:
+		return r.strings_Trim(functionCall.Arguments)
+
+	case parsers.FunctionCallIsDefined:
+		return r.typeChecking_IsDefined(functionCall.Arguments)
+	case parsers.FunctionCallIsArray:
+		return r.typeChecking_IsArray(functionCall.Arguments)
+	case parsers.FunctionCallIsBool:
+		return r.typeChecking_IsBool(functionCall.Arguments)
+	case parsers.FunctionCallIsFiniteNumber:
+		return r.typeChecking_IsFiniteNumber(functionCall.Arguments)
+	case parsers.FunctionCallIsInteger:
+		return r.typeChecking_IsInteger(functionCall.Arguments)
+	case parsers.FunctionCallIsNull:
+		return r.typeChecking_IsNull(functionCall.Arguments)
+	case parsers.FunctionCallIsNumber:
+		return r.typeChecking_IsNumber(functionCall.Arguments)
+	case parsers.FunctionCallIsObject:
+		return r.typeChecking_IsObject(functionCall.Arguments)
+	case parsers.FunctionCallIsPrimitive:
+		return r.typeChecking_IsPrimitive(functionCall.Arguments)
+	case parsers.FunctionCallIsString:
+		return r.typeChecking_IsString(functionCall.Arguments)
+
+	case parsers.FunctionCallArrayConcat:
+		return r.array_Concat(functionCall.Arguments)
+	case parsers.FunctionCallArrayContains:
+		return r.array_Contains(functionCall.Arguments)
+	case parsers.FunctionCallArrayContainsAny:
+		return r.array_Contains_Any(functionCall.Arguments)
+	case parsers.FunctionCallArrayContainsAll:
+		return r.array_Contains_All(functionCall.Arguments)
+	case parsers.FunctionCallArrayLength:
+		return r.array_Length(functionCall.Arguments)
+	case parsers.FunctionCallArraySlice:
+		return r.array_Slice(functionCall.Arguments)
+	case parsers.FunctionCallSetIntersect:
+		return r.set_Intersect(functionCall.Arguments)
+	case parsers.FunctionCallSetUnion:
+		return r.set_Union(functionCall.Arguments)
+
+	case parsers.FunctionCallIif:
+		return r.misc_Iif(functionCall.Arguments)
+
+	case parsers.FunctionCallMathAbs:
+		return r.math_Abs(functionCall.Arguments)
+	case parsers.FunctionCallMathAcos:
+		return r.math_Acos(functionCall.Arguments)
+	case parsers.FunctionCallMathAsin:
+		return r.math_Asin(functionCall.Arguments)
+	case parsers.FunctionCallMathAtan:
+		return r.math_Atan(functionCall.Arguments)
+	case parsers.FunctionCallMathCeiling:
+		return r.math_Ceiling(functionCall.Arguments)
+	case parsers.FunctionCallMathCos:
+		return r.math_Cos(functionCall.Arguments)
+	case parsers.FunctionCallMathCot:
+		return r.math_Cot(functionCall.Arguments)
+	case parsers.FunctionCallMathDegrees:
+		return r.math_Degrees(functionCall.Arguments)
+	case parsers.FunctionCallMathExp:
+		return r.math_Exp(functionCall.Arguments)
+	case parsers.FunctionCallMathFloor:
+		return r.math_Floor(functionCall.Arguments)
+	case parsers.FunctionCallMathIntBitNot:
+		return r.math_IntBitNot(functionCall.Arguments)
+	case parsers.FunctionCallMathLog10:
+		return r.math_Log10(functionCall.Arguments)
+	case parsers.FunctionCallMathRadians:
+		return r.math_Radians(functionCall.Arguments)
+	case parsers.FunctionCallMathRound:
+		return r.math_Round(functionCall.Arguments)
+	case parsers.FunctionCallMathSign:
+		return r.math_Sign(functionCall.Arguments)
+	case parsers.FunctionCallMathSin:
+		return r.math_Sin(functionCall.Arguments)
+	case parsers.FunctionCallMathSqrt:
+		return r.math_Sqrt(functionCall.Arguments)
+	case parsers.FunctionCallMathSquare:
+		return r.math_Square(functionCall.Arguments)
+	case parsers.FunctionCallMathTan:
+		return r.math_Tan(functionCall.Arguments)
+	case parsers.FunctionCallMathTrunc:
+		return r.math_Trunc(functionCall.Arguments)
+	case parsers.FunctionCallMathAtn2:
+		return r.math_Atn2(functionCall.Arguments)
+	case parsers.FunctionCallMathIntAdd:
+		return r.math_IntAdd(functionCall.Arguments)
+	case parsers.FunctionCallMathIntBitAnd:
+		return r.math_IntBitAnd(functionCall.Arguments)
+	case parsers.FunctionCallMathIntBitLeftShift:
+		return r.math_IntBitLeftShift(functionCall.Arguments)
+	case parsers.FunctionCallMathIntBitOr:
+		return r.math_IntBitOr(functionCall.Arguments)
+	case parsers.FunctionCallMathIntBitRightShift:
+		return r.math_IntBitRightShift(functionCall.Arguments)
+	case parsers.FunctionCallMathIntBitXor:
+		return r.math_IntBitXor(functionCall.Arguments)
+	case parsers.FunctionCallMathIntDiv:
+		return r.math_IntDiv(functionCall.Arguments)
+	case parsers.FunctionCallMathIntMod:
+		return r.math_IntMod(functionCall.Arguments)
+	case parsers.FunctionCallMathIntMul:
+		return r.math_IntMul(functionCall.Arguments)
+	case parsers.FunctionCallMathIntSub:
+		return r.math_IntSub(functionCall.Arguments)
+	case parsers.FunctionCallMathPower:
+		return r.math_Power(functionCall.Arguments)
+	case parsers.FunctionCallMathLog:
+		return r.math_Log(functionCall.Arguments)
+	case parsers.FunctionCallMathNumberBin:
+		return r.math_NumberBin(functionCall.Arguments)
+	case parsers.FunctionCallMathPi:
+		return r.math_Pi()
+	case parsers.FunctionCallMathRand:
+		return r.math_Rand()
+
+	case parsers.FunctionCallAggregateAvg:
+		return r.aggregate_Avg(functionCall.Arguments)
+	case parsers.FunctionCallAggregateCount:
+		return r.aggregate_Count(functionCall.Arguments)
+	case parsers.FunctionCallAggregateMax:
+		return r.aggregate_Max(functionCall.Arguments)
+	case parsers.FunctionCallAggregateMin:
+		return r.aggregate_Min(functionCall.Arguments)
+	case parsers.FunctionCallAggregateSum:
+		return r.aggregate_Sum(functionCall.Arguments)
+
+	case parsers.FunctionCallIn:
+		return r.misc_In(functionCall.Arguments)
+	}
+
+	logger.Errorf("Unknown function call type: %v", functionCall.Type)
+	return nil
+}
+
+func (r rowContext) selectItem_SelectItemTypeBinaryExpression(binaryExpression parsers.BinaryExpression) interface{} {
+	if binaryExpression.Left == nil || binaryExpression.Right == nil {
+		logger.Debug("parsers.BinaryExpression has nil Left or Right value")
+		return nil
+	}
+
+	leftValue := r.resolveSelectItem(binaryExpression.Left.(parsers.SelectItem))
+	rightValue := r.resolveSelectItem(binaryExpression.Right.(parsers.SelectItem))
+
+	if leftValue == nil || rightValue == nil {
+		return nil
+	}
+
+	leftNumber, leftIsNumber := numToFloat64(leftValue)
+	rightNumber, rightIsNumber := numToFloat64(rightValue)
+
+	if !leftIsNumber || !rightIsNumber {
+		logger.Debug("Binary expression operands are not numbers, returning nil")
+		return nil
+	}
+
+	switch binaryExpression.Operation {
+	case "+":
+		return leftNumber + rightNumber
+	case "-":
+		return leftNumber - rightNumber
+	case "*":
+		return leftNumber * rightNumber
+	case "/":
+		if rightNumber == 0 {
+			logger.Debug("Division by zero in binary expression")
+			return nil
+		}
+		return leftNumber / rightNumber
+	default:
+		return nil
+	}
+}
+
+func (r rowContext) selectItem_SelectItemTypeField(selectItem parsers.SelectItem) interface{} {
+	value := r.tables[selectItem.Path[0]]
+
+	if len(selectItem.Path) > 1 {
+		for _, pathSegment := range selectItem.Path[1:] {
+			if pathSegment[0] == '@' {
+				pathSegment = r.parameters[pathSegment].(string)
+			}
+
+			switch nestedValue := value.(type) {
+			case map[string]interface{}:
+				value = nestedValue[pathSegment]
+			case map[string]RowType:
+				value = nestedValue[pathSegment]
+			case datastore.Document:
+				value = nestedValue[pathSegment]
+			case map[string]datastore.Document:
+				value = nestedValue[pathSegment]
+			case []int, []string, []interface{}:
+				slice := reflect.ValueOf(nestedValue)
+				if arrayIndex, err := strconv.Atoi(pathSegment); err == nil && slice.Len() > arrayIndex {
+					value = slice.Index(arrayIndex).Interface()
+				} else {
+					return nil
+				}
+			default:
+				return nil
+			}
+		}
+	}
+
+	return value
+}
+
+func compareValues(val1, val2 interface{}) int {
+	// Handle nil values
+	if val1 == nil && val2 == nil {
+		return 0
+	} else if val1 == nil {
+		return -1
+	} else if val2 == nil {
+		return 1
+	}
+
+	// Handle number values
+	val1Number, val1IsNumber := numToFloat64(val1)
+	val2Number, val2IsNumber := numToFloat64(val2)
+	if val1IsNumber && val2IsNumber {
+		if val1Number < val2Number {
+			return -1
+		} else if val1Number > val2Number {
+			return 1
+		}
+		return 0
+	}
+
+	// Handle different types
+	if reflect.TypeOf(val1) != reflect.TypeOf(val2) {
+		return 1
+	}
+
+	switch val1 := val1.(type) {
+	case string:
+		val2 := val2.(string)
+		return strings.Compare(val1, val2)
+	case bool:
+		val2 := val2.(bool)
+		if val1 == val2 {
+			return 0
+		} else if val1 {
+			return 1
+		} else {
+			return -1
+		}
+	// TODO: Add more types
+	default:
+		if reflect.DeepEqual(val1, val2) {
+			return 0
+		}
+		return 1
+	}
+}
+
+func copyMap[T RowType | []RowType](originalMap map[string]T) map[string]T {
+	targetMap := make(map[string]T)
+
+	for k, v := range originalMap {
+		targetMap[k] = v
+	}
+
+	return targetMap
+}

query_executors/memory_executor/comparison_expression_test.go

@@ -0,0 +1,92 @@
+package memoryexecutor_test
+
+import (
+	"testing"
+
+	"github.com/pikami/cosmium/parsers"
+	memoryexecutor "github.com/pikami/cosmium/query_executors/memory_executor"
+	testutils "github.com/pikami/cosmium/test_utils"
+)
+
+func Test_Execute_Expressions(t *testing.T) {
+	mockData := []memoryexecutor.RowType{
+		map[string]interface{}{"id": "123", "age": 10, "isCool": true},
+		map[string]interface{}{"id": "456", "age": 20, "isCool": false},
+		map[string]interface{}{"id": "789", "age": 30, "isCool": true},
+	}
+
+	t.Run("Should execute comparison expressions in SELECT", func(t *testing.T) {
+		testQueryExecute(
+			t,
+			parsers.SelectStmt{
+				SelectItems: []parsers.SelectItem{
+					{
+						Path: []string{"c", "id"},
+						Type: parsers.SelectItemTypeField,
+					},
+					{
+						Alias: "isAdult",
+						Type:  parsers.SelectItemTypeExpression,
+						Value: parsers.ComparisonExpression{
+							Operation: ">=",
+							Left:      testutils.SelectItem_Path("c", "age"),
+							Right:     testutils.SelectItem_Constant_Int(18),
+						},
+					},
+					{
+						Alias: "isNotCool",
+						Type:  parsers.SelectItemTypeExpression,
+						Value: parsers.ComparisonExpression{
+							Operation: "!=",
+							Left:      testutils.SelectItem_Path("c", "isCool"),
+							Right:     testutils.SelectItem_Constant_Bool(true),
+						},
+					},
+				},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
+			},
+			mockData,
+			[]memoryexecutor.RowType{
+				map[string]interface{}{"id": "123", "isAdult": false, "isNotCool": false},
+				map[string]interface{}{"id": "456", "isAdult": true, "isNotCool": true},
+				map[string]interface{}{"id": "789", "isAdult": true, "isNotCool": false},
+			},
+		)
+	})
+
+	t.Run("Should execute logical expressions in SELECT", func(t *testing.T) {
+		testQueryExecute(
+			t,
+			parsers.SelectStmt{
+				SelectItems: []parsers.SelectItem{
+					{
+						Path: []string{"c", "id"},
+						Type: parsers.SelectItemTypeField,
+					},
+					{
+						Alias: "isCoolAndAdult",
+						Type:  parsers.SelectItemTypeExpression,
+						Value: parsers.LogicalExpression{
+							Operation: parsers.LogicalExpressionTypeAnd,
+							Expressions: []interface{}{
+								testutils.SelectItem_Path("c", "isCool"),
+								parsers.ComparisonExpression{
+									Operation: ">=",
+									Left:      testutils.SelectItem_Path("c", "age"),
+									Right:     testutils.SelectItem_Constant_Int(18),
+								},
+							},
+						},
+					},
+				},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
+			},
+			mockData,
+			[]memoryexecutor.RowType{
+				map[string]interface{}{"id": "123", "isCoolAndAdult": false},
+				map[string]interface{}{"id": "456", "isCoolAndAdult": false},
+				map[string]interface{}{"id": "789", "isCoolAndAdult": true},
+			},
+		)
+	})
+}

query_executors/memory_executor/distinct_iterator.go

@@ -0,0 +1,36 @@
+package memoryexecutor
+
+import "github.com/pikami/cosmium/internal/datastore"
+
+type distinctIterator struct {
+	documents rowTypeIterator
+	seenDocs  []RowType
+}
+
+func (di *distinctIterator) Next() (RowType, datastore.DataStoreStatus) {
+	if di.documents == nil {
+		return rowContext{}, datastore.IterEOF
+	}
+
+	for {
+		row, status := di.documents.Next()
+		if status != datastore.StatusOk {
+			di.documents = nil
+			return rowContext{}, status
+		}
+
+		if !di.seen(row) {
+			di.seenDocs = append(di.seenDocs, row)
+			return row, status
+		}
+	}
+}
+
+func (di *distinctIterator) seen(row RowType) bool {
+	for _, seenRow := range di.seenDocs {
+		if compareValues(seenRow, row) == 0 {
+			return true
+		}
+	}
+	return false
+}

query_executors/memory_executor/filter_iterator.go

@@ -0,0 +1,143 @@
+package memoryexecutor
+
+import (
+	"github.com/pikami/cosmium/internal/datastore"
+	"github.com/pikami/cosmium/internal/logger"
+	"github.com/pikami/cosmium/parsers"
+)
+
+type filterIterator struct {
+	documents rowIterator
+	filters   interface{}
+}
+
+func (fi *filterIterator) Next() (rowContext, datastore.DataStoreStatus) {
+	if fi.documents == nil {
+		return rowContext{}, datastore.IterEOF
+	}
+
+	for {
+		row, status := fi.documents.Next()
+		if status != datastore.StatusOk {
+			fi.documents = nil
+			return rowContext{}, status
+		}
+
+		if fi.evaluateFilters(row) {
+			return row, status
+		}
+	}
+}
+
+func (fi *filterIterator) evaluateFilters(row rowContext) bool {
+	if fi.filters == nil {
+		return true
+	}
+
+	switch typedFilters := fi.filters.(type) {
+	case parsers.ComparisonExpression:
+		return row.filters_ComparisonExpression(typedFilters)
+	case parsers.LogicalExpression:
+		return row.filters_LogicalExpression(typedFilters)
+	case parsers.Constant:
+		if value, ok := typedFilters.Value.(bool); ok {
+			return value
+		}
+		return false
+	case parsers.SelectItem:
+		resolvedValue := row.resolveSelectItem(typedFilters)
+		if value, ok := resolvedValue.(bool); ok {
+			if typedFilters.Invert {
+				return !value
+			}
+
+			return value
+		}
+	}
+
+	return false
+}
+
+func (r rowContext) applyFilters(filters interface{}) bool {
+	if filters == nil {
+		return true
+	}
+
+	switch typedFilters := filters.(type) {
+	case parsers.ComparisonExpression:
+		return r.filters_ComparisonExpression(typedFilters)
+	case parsers.LogicalExpression:
+		return r.filters_LogicalExpression(typedFilters)
+	case parsers.Constant:
+		if value, ok := typedFilters.Value.(bool); ok {
+			return value
+		}
+		return false
+	case parsers.SelectItem:
+		resolvedValue := r.resolveSelectItem(typedFilters)
+		if value, ok := resolvedValue.(bool); ok {
+			if typedFilters.Invert {
+				return !value
+			}
+
+			return value
+		}
+	}
+
+	return false
+}
+
+func (r rowContext) filters_ComparisonExpression(expression parsers.ComparisonExpression) bool {
+	leftExpression, leftExpressionOk := expression.Left.(parsers.SelectItem)
+	rightExpression, rightExpressionOk := expression.Right.(parsers.SelectItem)
+
+	if !leftExpressionOk || !rightExpressionOk {
+		logger.ErrorLn("ComparisonExpression has incorrect Left or Right type")
+		return false
+	}
+
+	leftValue := r.resolveSelectItem(leftExpression)
+	rightValue := r.resolveSelectItem(rightExpression)
+
+	cmp := compareValues(leftValue, rightValue)
+	switch expression.Operation {
+	case "=":
+		return cmp == 0
+	case "!=":
+		return cmp != 0
+	case "<":
+		return cmp < 0
+	case ">":
+		return cmp > 0
+	case "<=":
+		return cmp <= 0
+	case ">=":
+		return cmp >= 0
+	}
+
+	return false
+}
+
+func (r rowContext) filters_LogicalExpression(expression parsers.LogicalExpression) bool {
+	var result bool
+	for i, subExpression := range expression.Expressions {
+		expressionResult := r.applyFilters(subExpression)
+		if i == 0 {
+			result = expressionResult
+		}
+
+		switch expression.Operation {
+		case parsers.LogicalExpressionTypeAnd:
+			result = result && expressionResult
+			if !result {
+				return false
+			}
+		case parsers.LogicalExpressionTypeOr:
+			result = result || expressionResult
+			if result {
+				return true
+			}
+		}
+	}
+	return result
+}

query_executors/memory_executor/from_iterator.go

@@ -0,0 +1,73 @@
+package memoryexecutor
+
+import (
+	"github.com/pikami/cosmium/internal/datastore"
+	"github.com/pikami/cosmium/parsers"
+)
+
+type fromIterator struct {
+	documents   rowIterator
+	table       parsers.Table
+	buffer      []rowContext
+	bufferIndex int
+}
+
+func (fi *fromIterator) Next() (rowContext, datastore.DataStoreStatus) {
+	if fi.documents == nil {
+		return rowContext{}, datastore.IterEOF
+	}
+
+	// Return from buffer if available
+	if fi.bufferIndex < len(fi.buffer) {
+		result := fi.buffer[fi.bufferIndex]
+		fi.buffer[fi.bufferIndex] = rowContext{}
+		fi.bufferIndex++
+		return result, datastore.StatusOk
+	}
+
+	// Resolve next row from documents
+	row, status := fi.documents.Next()
+	if status != datastore.StatusOk {
+		fi.documents = nil
+		return row, status
+	}
+
+	if fi.table.SelectItem.Path != nil || fi.table.SelectItem.Type == parsers.SelectItemTypeSubQuery {
+		destinationTableName := fi.table.SelectItem.Alias
+		if destinationTableName == "" {
+			destinationTableName = fi.table.Value
+		}
+		if destinationTableName == "" {
+			destinationTableName = resolveDestinationColumnName(fi.table.SelectItem, 0, row.parameters)
+		}
+
+		if fi.table.IsInSelect || fi.table.SelectItem.Type == parsers.SelectItemTypeSubQuery {
+			selectValue := row.parseArray(fi.table.SelectItem)
+			rowContexts := make([]rowContext, len(selectValue))
+			for i, newRowData := range selectValue {
+				rowContexts[i].parameters = row.parameters
+				rowContexts[i].tables = copyMap(row.tables)
+				rowContexts[i].tables[destinationTableName] = newRowData
+			}
+
+			fi.buffer = rowContexts
+			fi.bufferIndex = 0
+			return fi.Next()
+		}
+
+		if len(fi.table.SelectItem.Path) > 0 {
+			sourceTableName := fi.table.SelectItem.Path[0]
+			sourceTableData := row.tables[sourceTableName]
+			if sourceTableData == nil {
+				// When source table is not found, assume it's root document
+				row.tables[sourceTableName] = row.tables["$root"]
+			}
+		}
+
+		newRowData := row.resolveSelectItem(fi.table.SelectItem)
+		row.tables[destinationTableName] = newRowData
+		return row, status
+	}
+
+	return row, status
+}