Run badger garbage collector periodically

README.md

@@ -86,6 +86,7 @@ To disable SSL and run Cosmium on HTTP instead, you can use the `-DisableTls` fl
 - **-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)
 - **-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.
 
@@ -99,6 +100,18 @@ All mentioned arguments can also be set using environment variables:
 - **COSMIUM_PORT** for `-Port`
 - **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
 
 This project is [MIT licensed](./LICENSE).

api/config/config.go

@@ -16,7 +16,7 @@ const (
 )
 
 const (
-	DataStoreMap    = "map"
+	DataStoreJson   = "json"
 	DataStoreBadger = "badger"
 )
 
@@ -33,8 +33,8 @@ func ParseFlags() ServerConfig {
 	persistDataPath := flag.String("Persist", "", "Saves data to given path on application exit")
 	logLevel := NewEnumValue("info", []string{"debug", "info", "error", "silent"})
 	flag.Var(logLevel, "LogLevel", fmt.Sprintf("Sets the logging level %s", logLevel.AllowedValuesList()))
-	dataStore := NewEnumValue("map", []string{DataStoreMap, DataStoreBadger})
-	flag.Var(dataStore, "DataStore", fmt.Sprintf("Sets the data store %s, (badger is currently in the experimental phase)", dataStore.AllowedValuesList()))
+	dataStore := NewEnumValue("json", []string{DataStoreJson, DataStoreBadger})
+	flag.Var(dataStore, "DataStore", fmt.Sprintf("Sets the data store %s", dataStore.AllowedValuesList()))
 
 	flag.Parse()
 	setFlagsFromEnvironment()
@@ -77,10 +77,15 @@ func (c *ServerConfig) PopulateCalculatedFields() {
 		logger.SetLogLevel(logger.LogLevelInfo)
 	}
 
-	if c.PersistDataFilePath != "" {
-		fileInfo, _ := os.Stat(c.PersistDataFilePath)
-		if c.DataStore == DataStoreMap && fileInfo.IsDir() {
-			logger.ErrorLn("--Persist cannot be a directory when using default data store")
+	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)
 		}
 

api/handlers/collections.go

@@ -5,6 +5,7 @@ import (
 	"net/http"
 
 	"github.com/gin-gonic/gin"
+	"github.com/pikami/cosmium/internal/constants"
 	"github.com/pikami/cosmium/internal/datastore"
 )
 
@@ -24,7 +25,7 @@ func (h *Handlers) GetAllCollections(c *gin.Context) {
 		return
 	}
 
-	c.IndentedJSON(http.StatusInternalServerError, gin.H{"message": "Unknown error"})
+	c.IndentedJSON(http.StatusInternalServerError, constants.UnknownErrorResponse)
 }
 
 func (h *Handlers) GetCollection(c *gin.Context) {
@@ -38,11 +39,11 @@ func (h *Handlers) GetCollection(c *gin.Context) {
 	}
 
 	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 (h *Handlers) DeleteCollection(c *gin.Context) {
@@ -56,11 +57,11 @@ func (h *Handlers) DeleteCollection(c *gin.Context) {
 	}
 
 	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 (h *Handlers) CreateCollection(c *gin.Context) {
@@ -73,13 +74,13 @@ func (h *Handlers) CreateCollection(c *gin.Context) {
 	}
 
 	if newCollection.ID == "" {
-		c.JSON(http.StatusBadRequest, gin.H{"message": "BadRequest"})
+		c.JSON(http.StatusBadRequest, constants.BadRequestResponse)
 		return
 	}
 
 	createdCollection, status := h.dataStore.CreateCollection(databaseId, newCollection)
 	if status == datastore.Conflict {
-		c.IndentedJSON(http.StatusConflict, gin.H{"message": "Conflict"})
+		c.IndentedJSON(http.StatusConflict, constants.ConflictResponse)
 		return
 	}
 
@@ -88,5 +89,5 @@ func (h *Handlers) CreateCollection(c *gin.Context) {
 		return
 	}
 
-	c.IndentedJSON(http.StatusInternalServerError, gin.H{"message": "Unknown error"})
+	c.IndentedJSON(http.StatusInternalServerError, constants.UnknownErrorResponse)
 }

api/handlers/databases.go

@@ -5,6 +5,7 @@ import (
 	"net/http"
 
 	"github.com/gin-gonic/gin"
+	"github.com/pikami/cosmium/internal/constants"
 	"github.com/pikami/cosmium/internal/datastore"
 )
 
@@ -20,7 +21,7 @@ func (h *Handlers) GetAllDatabases(c *gin.Context) {
 		return
 	}
 
-	c.IndentedJSON(http.StatusInternalServerError, gin.H{"message": "Unknown error"})
+	c.IndentedJSON(http.StatusInternalServerError, constants.UnknownErrorResponse)
 }
 
 func (h *Handlers) GetDatabase(c *gin.Context) {
@@ -33,11 +34,11 @@ func (h *Handlers) GetDatabase(c *gin.Context) {
 	}
 
 	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 (h *Handlers) DeleteDatabase(c *gin.Context) {
@@ -50,11 +51,11 @@ func (h *Handlers) DeleteDatabase(c *gin.Context) {
 	}
 
 	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 (h *Handlers) CreateDatabase(c *gin.Context) {
@@ -66,13 +67,13 @@ func (h *Handlers) CreateDatabase(c *gin.Context) {
 	}
 
 	if newDatabase.ID == "" {
-		c.JSON(http.StatusBadRequest, gin.H{"message": "BadRequest"})
+		c.JSON(http.StatusBadRequest, constants.BadRequestResponse)
 		return
 	}
 
 	createdDatabase, status := h.dataStore.CreateDatabase(newDatabase)
 	if status == datastore.Conflict {
-		c.IndentedJSON(http.StatusConflict, gin.H{"message": "Conflict"})
+		c.IndentedJSON(http.StatusConflict, constants.ConflictResponse)
 		return
 	}
 
@@ -81,5 +82,5 @@ func (h *Handlers) CreateDatabase(c *gin.Context) {
 		return
 	}
 
-	c.IndentedJSON(http.StatusInternalServerError, gin.H{"message": "Unknown error"})
+	c.IndentedJSON(http.StatusInternalServerError, constants.UnknownErrorResponse)
 }

api/handlers/documents.go

@@ -35,7 +35,7 @@ func (h *Handlers) GetAllDocuments(c *gin.Context) {
 		return
 	}
 
-	c.IndentedJSON(http.StatusInternalServerError, gin.H{"message": "Unknown error"})
+	c.IndentedJSON(http.StatusInternalServerError, constants.UnknownErrorResponse)
 }
 
 func (h *Handlers) GetDocument(c *gin.Context) {
@@ -50,11 +50,11 @@ func (h *Handlers) GetDocument(c *gin.Context) {
 	}
 
 	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 (h *Handlers) DeleteDocument(c *gin.Context) {
@@ -69,11 +69,11 @@ func (h *Handlers) DeleteDocument(c *gin.Context) {
 	}
 
 	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 data store
@@ -90,13 +90,13 @@ func (h *Handlers) ReplaceDocument(c *gin.Context) {
 
 	status := h.dataStore.DeleteDocument(databaseId, collectionId, documentId)
 	if status == datastore.StatusNotFound {
-		c.IndentedJSON(http.StatusNotFound, gin.H{"message": "NotFound"})
+		c.IndentedJSON(http.StatusNotFound, constants.NotFoundResponse)
 		return
 	}
 
 	createdDocument, status := h.dataStore.CreateDocument(databaseId, collectionId, requestBody)
 	if status == datastore.Conflict {
-		c.IndentedJSON(http.StatusConflict, gin.H{"message": "Conflict"})
+		c.IndentedJSON(http.StatusConflict, constants.ConflictResponse)
 		return
 	}
 
@@ -105,7 +105,7 @@ func (h *Handlers) ReplaceDocument(c *gin.Context) {
 		return
 	}
 
-	c.IndentedJSON(http.StatusInternalServerError, gin.H{"message": "Unknown error"})
+	c.IndentedJSON(http.StatusInternalServerError, constants.UnknownErrorResponse)
 }
 
 func (h *Handlers) PatchDocument(c *gin.Context) {
@@ -115,7 +115,7 @@ func (h *Handlers) PatchDocument(c *gin.Context) {
 
 	document, status := h.dataStore.GetDocument(databaseId, collectionId, documentId)
 	if status == datastore.StatusNotFound {
-		c.IndentedJSON(http.StatusNotFound, gin.H{"message": "NotFound"})
+		c.IndentedJSON(http.StatusNotFound, constants.NotFoundResponse)
 		return
 	}
 
@@ -166,13 +166,13 @@ func (h *Handlers) PatchDocument(c *gin.Context) {
 
 	status = h.dataStore.DeleteDocument(databaseId, collectionId, documentId)
 	if status == datastore.StatusNotFound {
-		c.IndentedJSON(http.StatusNotFound, gin.H{"message": "NotFound"})
+		c.IndentedJSON(http.StatusNotFound, constants.NotFoundResponse)
 		return
 	}
 
 	createdDocument, status := h.dataStore.CreateDocument(databaseId, collectionId, modifiedDocument)
 	if status == datastore.Conflict {
-		c.IndentedJSON(http.StatusConflict, gin.H{"message": "Conflict"})
+		c.IndentedJSON(http.StatusConflict, constants.ConflictResponse)
 		return
 	}
 
@@ -181,7 +181,7 @@ func (h *Handlers) PatchDocument(c *gin.Context) {
 		return
 	}
 
-	c.IndentedJSON(http.StatusInternalServerError, gin.H{"message": "Unknown error"})
+	c.IndentedJSON(http.StatusInternalServerError, constants.UnknownErrorResponse)
 }
 
 func (h *Handlers) DocumentsPost(c *gin.Context) {
@@ -208,7 +208,7 @@ func (h *Handlers) DocumentsPost(c *gin.Context) {
 	}
 
 	if requestBody["id"] == "" {
-		c.JSON(http.StatusBadRequest, gin.H{"message": "BadRequest"})
+		c.JSON(http.StatusBadRequest, constants.BadRequestResponse)
 		return
 	}
 
@@ -219,7 +219,7 @@ func (h *Handlers) DocumentsPost(c *gin.Context) {
 
 	createdDocument, status := h.dataStore.CreateDocument(databaseId, collectionId, requestBody)
 	if status == datastore.Conflict {
-		c.IndentedJSON(http.StatusConflict, gin.H{"message": "Conflict"})
+		c.IndentedJSON(http.StatusConflict, constants.ConflictResponse)
 		return
 	}
 
@@ -228,7 +228,7 @@ func (h *Handlers) DocumentsPost(c *gin.Context) {
 		return
 	}
 
-	c.IndentedJSON(http.StatusInternalServerError, gin.H{"message": "Unknown error"})
+	c.IndentedJSON(http.StatusInternalServerError, constants.UnknownErrorResponse)
 }
 
 func parametersToMap(pairs []interface{}) map[string]interface{} {

api/handlers/partition_key_ranges.go

@@ -5,6 +5,7 @@ import (
 	"net/http"
 
 	"github.com/gin-gonic/gin"
+	"github.com/pikami/cosmium/internal/constants"
 	"github.com/pikami/cosmium/internal/datastore"
 	"github.com/pikami/cosmium/internal/resourceid"
 )
@@ -42,9 +43,9 @@ func (h *Handlers) GetPartitionKeyRanges(c *gin.Context) {
 	}
 
 	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/stored_procedures.go

@@ -5,6 +5,7 @@ import (
 	"net/http"
 
 	"github.com/gin-gonic/gin"
+	"github.com/pikami/cosmium/internal/constants"
 	"github.com/pikami/cosmium/internal/datastore"
 )
 
@@ -20,7 +21,7 @@ func (h *Handlers) GetAllStoredProcedures(c *gin.Context) {
 		return
 	}
 
-	c.IndentedJSON(http.StatusInternalServerError, gin.H{"message": "Unknown error"})
+	c.IndentedJSON(http.StatusInternalServerError, constants.UnknownErrorResponse)
 }
 
 func (h *Handlers) GetStoredProcedure(c *gin.Context) {
@@ -36,11 +37,11 @@ func (h *Handlers) GetStoredProcedure(c *gin.Context) {
 	}
 
 	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 (h *Handlers) DeleteStoredProcedure(c *gin.Context) {
@@ -55,11 +56,11 @@ func (h *Handlers) DeleteStoredProcedure(c *gin.Context) {
 	}
 
 	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 (h *Handlers) ReplaceStoredProcedure(c *gin.Context) {
@@ -69,19 +70,19 @@ func (h *Handlers) ReplaceStoredProcedure(c *gin.Context) {
 
 	var sp datastore.StoredProcedure
 	if err := c.BindJSON(&sp); err != nil {
-		c.IndentedJSON(http.StatusBadRequest, gin.H{"message": "Invalid body"})
+		c.IndentedJSON(http.StatusBadRequest, constants.BadRequestResponse)
 		return
 	}
 
 	status := h.dataStore.DeleteStoredProcedure(databaseId, collectionId, spId)
 	if status == datastore.StatusNotFound {
-		c.IndentedJSON(http.StatusNotFound, gin.H{"message": "NotFound"})
+		c.IndentedJSON(http.StatusNotFound, constants.NotFoundResponse)
 		return
 	}
 
 	createdSP, status := h.dataStore.CreateStoredProcedure(databaseId, collectionId, sp)
 	if status == datastore.Conflict {
-		c.IndentedJSON(http.StatusConflict, gin.H{"message": "Conflict"})
+		c.IndentedJSON(http.StatusConflict, constants.ConflictResponse)
 		return
 	}
 
@@ -90,7 +91,7 @@ func (h *Handlers) ReplaceStoredProcedure(c *gin.Context) {
 		return
 	}
 
-	c.IndentedJSON(http.StatusInternalServerError, gin.H{"message": "Unknown error"})
+	c.IndentedJSON(http.StatusInternalServerError, constants.UnknownErrorResponse)
 }
 
 func (h *Handlers) CreateStoredProcedure(c *gin.Context) {
@@ -99,13 +100,13 @@ func (h *Handlers) CreateStoredProcedure(c *gin.Context) {
 
 	var sp datastore.StoredProcedure
 	if err := c.BindJSON(&sp); err != nil {
-		c.IndentedJSON(http.StatusBadRequest, gin.H{"message": "Invalid body"})
+		c.IndentedJSON(http.StatusBadRequest, constants.BadRequestResponse)
 		return
 	}
 
 	createdSP, status := h.dataStore.CreateStoredProcedure(databaseId, collectionId, sp)
 	if status == datastore.Conflict {
-		c.IndentedJSON(http.StatusConflict, gin.H{"message": "Conflict"})
+		c.IndentedJSON(http.StatusConflict, constants.ConflictResponse)
 		return
 	}
 
@@ -114,5 +115,5 @@ func (h *Handlers) CreateStoredProcedure(c *gin.Context) {
 		return
 	}
 
-	c.IndentedJSON(http.StatusInternalServerError, gin.H{"message": "Unknown error"})
+	c.IndentedJSON(http.StatusInternalServerError, constants.UnknownErrorResponse)
 }

api/handlers/triggers.go

@@ -5,6 +5,7 @@ import (
 	"net/http"
 
 	"github.com/gin-gonic/gin"
+	"github.com/pikami/cosmium/internal/constants"
 	"github.com/pikami/cosmium/internal/datastore"
 )
 
@@ -20,7 +21,7 @@ func (h *Handlers) GetAllTriggers(c *gin.Context) {
 		return
 	}
 
-	c.IndentedJSON(http.StatusInternalServerError, gin.H{"message": "Unknown error"})
+	c.IndentedJSON(http.StatusInternalServerError, constants.UnknownErrorResponse)
 }
 
 func (h *Handlers) GetTrigger(c *gin.Context) {
@@ -36,11 +37,11 @@ func (h *Handlers) GetTrigger(c *gin.Context) {
 	}
 
 	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 (h *Handlers) DeleteTrigger(c *gin.Context) {
@@ -55,11 +56,11 @@ func (h *Handlers) DeleteTrigger(c *gin.Context) {
 	}
 
 	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 (h *Handlers) ReplaceTrigger(c *gin.Context) {
@@ -69,19 +70,19 @@ func (h *Handlers) ReplaceTrigger(c *gin.Context) {
 
 	var trigger datastore.Trigger
 	if err := c.BindJSON(&trigger); err != nil {
-		c.IndentedJSON(http.StatusBadRequest, gin.H{"message": "Invalid body"})
+		c.IndentedJSON(http.StatusBadRequest, constants.BadRequestResponse)
 		return
 	}
 
 	status := h.dataStore.DeleteTrigger(databaseId, collectionId, triggerId)
 	if status == datastore.StatusNotFound {
-		c.IndentedJSON(http.StatusNotFound, gin.H{"message": "NotFound"})
+		c.IndentedJSON(http.StatusNotFound, constants.NotFoundResponse)
 		return
 	}
 
 	createdTrigger, status := h.dataStore.CreateTrigger(databaseId, collectionId, trigger)
 	if status == datastore.Conflict {
-		c.IndentedJSON(http.StatusConflict, gin.H{"message": "Conflict"})
+		c.IndentedJSON(http.StatusConflict, constants.ConflictResponse)
 		return
 	}
 
@@ -90,7 +91,7 @@ func (h *Handlers) ReplaceTrigger(c *gin.Context) {
 		return
 	}
 
-	c.IndentedJSON(http.StatusInternalServerError, gin.H{"message": "Unknown error"})
+	c.IndentedJSON(http.StatusInternalServerError, constants.UnknownErrorResponse)
 }
 
 func (h *Handlers) CreateTrigger(c *gin.Context) {
@@ -99,13 +100,13 @@ func (h *Handlers) CreateTrigger(c *gin.Context) {
 
 	var trigger datastore.Trigger
 	if err := c.BindJSON(&trigger); err != nil {
-		c.IndentedJSON(http.StatusBadRequest, gin.H{"message": "Invalid body"})
+		c.IndentedJSON(http.StatusBadRequest, constants.BadRequestResponse)
 		return
 	}
 
 	createdTrigger, status := h.dataStore.CreateTrigger(databaseId, collectionId, trigger)
 	if status == datastore.Conflict {
-		c.IndentedJSON(http.StatusConflict, gin.H{"message": "Conflict"})
+		c.IndentedJSON(http.StatusConflict, constants.ConflictResponse)
 		return
 	}
 
@@ -114,5 +115,5 @@ func (h *Handlers) CreateTrigger(c *gin.Context) {
 		return
 	}
 
-	c.IndentedJSON(http.StatusInternalServerError, gin.H{"message": "Unknown error"})
+	c.IndentedJSON(http.StatusInternalServerError, constants.UnknownErrorResponse)
 }

api/handlers/user_defined_functions.go

@@ -5,6 +5,7 @@ import (
 	"net/http"
 
 	"github.com/gin-gonic/gin"
+	"github.com/pikami/cosmium/internal/constants"
 	"github.com/pikami/cosmium/internal/datastore"
 )
 
@@ -20,7 +21,7 @@ func (h *Handlers) GetAllUserDefinedFunctions(c *gin.Context) {
 		return
 	}
 
-	c.IndentedJSON(http.StatusInternalServerError, gin.H{"message": "Unknown error"})
+	c.IndentedJSON(http.StatusInternalServerError, constants.UnknownErrorResponse)
 }
 
 func (h *Handlers) GetUserDefinedFunction(c *gin.Context) {
@@ -36,11 +37,11 @@ func (h *Handlers) GetUserDefinedFunction(c *gin.Context) {
 	}
 
 	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 (h *Handlers) DeleteUserDefinedFunction(c *gin.Context) {
@@ -55,11 +56,11 @@ func (h *Handlers) DeleteUserDefinedFunction(c *gin.Context) {
 	}
 
 	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 (h *Handlers) ReplaceUserDefinedFunction(c *gin.Context) {
@@ -69,19 +70,19 @@ func (h *Handlers) ReplaceUserDefinedFunction(c *gin.Context) {
 
 	var udf datastore.UserDefinedFunction
 	if err := c.BindJSON(&udf); err != nil {
-		c.IndentedJSON(http.StatusBadRequest, gin.H{"message": "Invalid body"})
+		c.IndentedJSON(http.StatusBadRequest, constants.BadRequestResponse)
 		return
 	}
 
 	status := h.dataStore.DeleteUserDefinedFunction(databaseId, collectionId, udfId)
 	if status == datastore.StatusNotFound {
-		c.IndentedJSON(http.StatusNotFound, gin.H{"message": "NotFound"})
+		c.IndentedJSON(http.StatusNotFound, constants.NotFoundResponse)
 		return
 	}
 
 	createdUdf, status := h.dataStore.CreateUserDefinedFunction(databaseId, collectionId, udf)
 	if status == datastore.Conflict {
-		c.IndentedJSON(http.StatusConflict, gin.H{"message": "Conflict"})
+		c.IndentedJSON(http.StatusConflict, constants.ConflictResponse)
 		return
 	}
 
@@ -90,7 +91,7 @@ func (h *Handlers) ReplaceUserDefinedFunction(c *gin.Context) {
 		return
 	}
 
-	c.IndentedJSON(http.StatusInternalServerError, gin.H{"message": "Unknown error"})
+	c.IndentedJSON(http.StatusInternalServerError, constants.UnknownErrorResponse)
 }
 
 func (h *Handlers) CreateUserDefinedFunction(c *gin.Context) {
@@ -99,13 +100,13 @@ func (h *Handlers) CreateUserDefinedFunction(c *gin.Context) {
 
 	var udf datastore.UserDefinedFunction
 	if err := c.BindJSON(&udf); err != nil {
-		c.IndentedJSON(http.StatusBadRequest, gin.H{"message": "Invalid body"})
+		c.IndentedJSON(http.StatusBadRequest, constants.BadRequestResponse)
 		return
 	}
 
 	createdUdf, status := h.dataStore.CreateUserDefinedFunction(databaseId, collectionId, udf)
 	if status == datastore.Conflict {
-		c.IndentedJSON(http.StatusConflict, gin.H{"message": "Conflict"})
+		c.IndentedJSON(http.StatusConflict, constants.ConflictResponse)
 		return
 	}
 
@@ -114,5 +115,5 @@ func (h *Handlers) CreateUserDefinedFunction(c *gin.Context) {
 		return
 	}
 
-	c.IndentedJSON(http.StatusInternalServerError, gin.H{"message": "Unknown error"})
+	c.IndentedJSON(http.StatusInternalServerError, constants.UnknownErrorResponse)
 }

api/tests/authentication_test.go

@@ -19,7 +19,7 @@ func Test_Authentication(t *testing.T) {
 	t.Run("Should get 200 when correct account key is used", func(t *testing.T) {
 		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)
@@ -35,7 +35,7 @@ func Test_Authentication(t *testing.T) {
 	t.Run("Should get 401 when wrong account key is used", func(t *testing.T) {
 		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)
@@ -72,7 +72,7 @@ func Test_Authentication_Disabled(t *testing.T) {
 	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(
-			fmt.Sprintf("AccountEndpoint=%s;AccountKey=%s", ts.URL, "AAAA"),
+			formatConnectionString(ts.URL, "AAAA"),
 			&azcosmos.ClientOptions{},
 		)
 		assert.Nil(t, err)
@@ -85,3 +85,7 @@ func Test_Authentication_Disabled(t *testing.T) {
 		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

@@ -13,7 +13,7 @@ import (
 )
 
 func Test_Collections(t *testing.T) {
-	presets := []testPreset{PresetMapStore, PresetBadgerStore}
+	presets := []testPreset{PresetJsonStore, PresetBadgerStore}
 
 	setUp := func(ts *TestServer, client *azcosmos.Client) *azcosmos.DatabaseClient {
 		ts.DataStore.CreateDatabase(datastore.Database{ID: testDatabaseName})

api/tests/config_test.go

@@ -10,7 +10,7 @@ import (
 	"github.com/pikami/cosmium/api/config"
 	"github.com/pikami/cosmium/internal/datastore"
 	badgerdatastore "github.com/pikami/cosmium/internal/datastore/badger_datastore"
-	mapdatastore "github.com/pikami/cosmium/internal/datastore/map_datastore"
+	jsondatastore "github.com/pikami/cosmium/internal/datastore/json_datastore"
 	"github.com/pikami/cosmium/internal/logger"
 	"github.com/stretchr/testify/assert"
 )
@@ -26,7 +26,7 @@ func getDefaultTestServerConfig() *config.ServerConfig {
 		AccountKey:              config.DefaultAccountKey,
 		ExplorerPath:            "/tmp/nothing",
 		ExplorerBaseUrlLocation: config.ExplorerBaseUrlLocation,
-		DataStore:               "map",
+		DataStore:               "json",
 	}
 }
 
@@ -34,9 +34,9 @@ func runTestServerCustomConfig(configuration *config.ServerConfig) *TestServer {
 	var dataStore datastore.DataStore
 	switch configuration.DataStore {
 	case config.DataStoreBadger:
-		dataStore = badgerdatastore.NewBadgerDataStore()
+		dataStore = badgerdatastore.NewBadgerDataStore(badgerdatastore.BadgerDataStoreOptions{})
 	default:
-		dataStore = mapdatastore.NewMapDataStore(mapdatastore.MapDataStoreOptions{})
+		dataStore = jsondatastore.NewJsonDataStore(jsondatastore.JsonDataStoreOptions{})
 	}
 
 	api := api.NewApiServer(dataStore, configuration)
@@ -71,7 +71,7 @@ type testFunc func(t *testing.T, ts *TestServer, cosmosClient *azcosmos.Client)
 type testPreset string
 
 const (
-	PresetMapStore    testPreset = "MapDS"
+	PresetJsonStore   testPreset = "JsonDS"
 	PresetBadgerStore testPreset = "BadgerDS"
 )
 
@@ -84,8 +84,8 @@ func runTestsWithPreset(t *testing.T, name string, testPreset testPreset, f test
 	switch testPreset {
 	case PresetBadgerStore:
 		serverConfig.DataStore = config.DataStoreBadger
-	case PresetMapStore:
-		serverConfig.DataStore = config.DataStoreMap
+	case PresetJsonStore:
+		serverConfig.DataStore = config.DataStoreJson
 	}
 
 	ts := runTestServerCustomConfig(serverConfig)

api/tests/databases_test.go

@@ -13,7 +13,7 @@ import (
 )
 
 func Test_Databases(t *testing.T) {
-	presets := []testPreset{PresetMapStore, PresetBadgerStore}
+	presets := []testPreset{PresetJsonStore, PresetBadgerStore}
 
 	runTestsWithPresets(t, "Database Create", presets, func(t *testing.T, ts *TestServer, client *azcosmos.Client) {
 		t.Run("Should create database", func(t *testing.T) {

api/tests/documents_test.go

@@ -81,7 +81,7 @@ func documents_InitializeDb(t *testing.T, ts *TestServer) *azcosmos.ContainerCli
 }
 
 func Test_Documents(t *testing.T) {
-	presets := []testPreset{PresetMapStore, PresetBadgerStore}
+	presets := []testPreset{PresetJsonStore, PresetBadgerStore}
 
 	runTestsWithPresets(t, "Test_Documents", presets, func(t *testing.T, ts *TestServer, client *azcosmos.Client) {
 		collectionClient := documents_InitializeDb(t, ts)

cmd/server/server.go

@@ -9,7 +9,7 @@ import (
 	"github.com/pikami/cosmium/api/config"
 	"github.com/pikami/cosmium/internal/datastore"
 	badgerdatastore "github.com/pikami/cosmium/internal/datastore/badger_datastore"
-	mapdatastore "github.com/pikami/cosmium/internal/datastore/map_datastore"
+	jsondatastore "github.com/pikami/cosmium/internal/datastore/json_datastore"
 	"github.com/pikami/cosmium/internal/logger"
 )
 
@@ -24,7 +24,7 @@ func main() {
 		})
 		logger.InfoLn("Using Badger data store")
 	default:
-		dataStore = mapdatastore.NewMapDataStore(mapdatastore.MapDataStoreOptions{
+		dataStore = jsondatastore.NewJsonDataStore(jsondatastore.JsonDataStoreOptions{
 			InitialDataFilePath: configuration.InitialDataFilePath,
 			PersistDataFilePath: configuration.PersistDataFilePath,
 		})

docs/COMPATIBILITY.md

@@ -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
 

go.mod

@@ -3,33 +3,34 @@ module github.com/pikami/cosmium
 go 1.24.0
 
 require (
-	github.com/Azure/azure-sdk-for-go/sdk/azcore v1.17.0
-	github.com/Azure/azure-sdk-for-go/sdk/data/azcosmos v1.3.0
+	github.com/Azure/azure-sdk-for-go/sdk/azcore v1.18.0
+	github.com/Azure/azure-sdk-for-go/sdk/data/azcosmos v1.4.0
 	github.com/cosmiumdev/json-patch/v5 v5.9.11
-	github.com/dgraph-io/badger/v4 v4.6.0
+	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 v1.10.0
-	golang.org/x/exp v0.0.0-20250305212735-054e65f0b394
+	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 v1.10.0 // indirect
-	github.com/bytedance/sonic v1.13.1 // indirect
+	github.com/Azure/azure-sdk-for-go/sdk/internal v1.11.1 // indirect
+	github.com/bytedance/sonic v1.13.2 // indirect
 	github.com/bytedance/sonic/loader v0.2.4 // indirect
 	github.com/cespare/xxhash/v2 v2.3.0 // indirect
 	github.com/cloudwego/base64x v0.1.5 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
-	github.com/dgraph-io/ristretto/v2 v2.1.0 // indirect
+	github.com/dgraph-io/ristretto/v2 v2.2.0 // indirect
 	github.com/dustin/go-humanize v1.0.1 // indirect
-	github.com/gabriel-vasile/mimetype v1.4.8 // indirect
-	github.com/gin-contrib/sse v1.0.0 // 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 v10.25.0 // indirect
+	github.com/go-playground/validator/v10 v10.26.0 // 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
@@ -39,22 +40,21 @@ require (
 	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 v2.2.3 // 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
-	github.com/vmihailenco/msgpack/v5 v5.4.1 // indirect
 	github.com/vmihailenco/tagparser/v2 v2.0.0 // indirect
 	go.opentelemetry.io/auto/sdk v1.1.0 // indirect
 	go.opentelemetry.io/otel v1.35.0 // indirect
 	go.opentelemetry.io/otel/metric v1.35.0 // indirect
 	go.opentelemetry.io/otel/trace v1.35.0 // indirect
-	golang.org/x/arch v0.15.0 // indirect
-	golang.org/x/crypto v0.36.0 // indirect
-	golang.org/x/net v0.37.0 // indirect
-	golang.org/x/sys v0.31.0 // indirect
-	golang.org/x/text v0.23.0 // indirect
-	google.golang.org/protobuf v1.36.5 // 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

@@ -2,16 +2,26 @@ github.com/Azure/azure-sdk-for-go v68.0.0+incompatible h1:fcYLmCpyNYRnvJbPerq7U0
 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 v1.17.0 h1:g0EZJwz7xkXQiZAI5xi9f3WWFYBlX1CPTrR+NDToRkQ=
 github.com/Azure/azure-sdk-for-go/sdk/azcore v1.17.0/go.mod h1:XCW7KnZet0Opnr7HccfUw1PLc4CjHqpcaxW8DHklNkQ=
+github.com/Azure/azure-sdk-for-go/sdk/azcore v1.18.0 h1:Gt0j3wceWMwPmiazCa8MzMA0MfhmPIz0Qp0FJ6qcM0U=
+github.com/Azure/azure-sdk-for-go/sdk/azcore v1.18.0/go.mod h1:Ot/6aikWnKWi4l9QB7qVSwa8iMphQNqkWALMoNT3rzM=
 github.com/Azure/azure-sdk-for-go/sdk/azidentity v1.8.0 h1:B/dfvscEQtew9dVuoxqxrUKKv8Ih2f55PydknDamU+g=
 github.com/Azure/azure-sdk-for-go/sdk/azidentity v1.8.0/go.mod h1:fiPSssYvltE08HJchL04dOy+RD4hgrjph0cwGGMntdI=
+github.com/Azure/azure-sdk-for-go/sdk/azidentity v1.8.2 h1:F0gBpfdPLGsw+nsgk6aqqkZS1jiixa5WwFe3fk/T3Ys=
 github.com/Azure/azure-sdk-for-go/sdk/data/azcosmos v1.3.0 h1:RGcdpSElvcXCwxydI0xzOBu1Gvp88OoiTGfbtO/z1m0=
 github.com/Azure/azure-sdk-for-go/sdk/data/azcosmos v1.3.0/go.mod h1:YwUyrNUtcZcibA99JcfCP6UUp95VVQKO2MJfBzgJDwA=
+github.com/Azure/azure-sdk-for-go/sdk/data/azcosmos v1.4.0 h1:TSaH6Lj0m8bDr4vX1+LC1KLQTnLzZb3tOxrx/PLqw+c=
+github.com/Azure/azure-sdk-for-go/sdk/data/azcosmos v1.4.0/go.mod h1:Krtog/7tz27z75TwM5cIS8bxEH4dcBUezcq+kGVeZEo=
 github.com/Azure/azure-sdk-for-go/sdk/internal v1.10.0 h1:ywEEhmNahHBihViHepv3xPBn1663uRv2t2q/ESv9seY=
 github.com/Azure/azure-sdk-for-go/sdk/internal v1.10.0/go.mod h1:iZDifYGJTIgIIkYRNWPENUnqx6bJ2xnSDFI2tjwZNuY=
+github.com/Azure/azure-sdk-for-go/sdk/internal v1.11.1 h1:FPKJS1T+clwv+OLGt13a8UjqeRuh0O4SJ3lUriThc+4=
+github.com/Azure/azure-sdk-for-go/sdk/internal v1.11.1/go.mod h1:j2chePtV91HrC22tGoRX3sGY42uF13WzmmV80/OdVAA=
 github.com/AzureAD/microsoft-authentication-library-for-go v1.3.2 h1:kYRSnvJju5gYVyhkij+RTJ/VR6QIUaCfWeaFm2ycsjQ=
 github.com/AzureAD/microsoft-authentication-library-for-go v1.3.2/go.mod h1:wP83P5OoQ5p6ip3ScPr0BAq0BvuPAvacpEuSzyouqAI=
+github.com/AzureAD/microsoft-authentication-library-for-go v1.4.2 h1:oygO0locgZJe7PpYPXT5A29ZkwJaPqcva7BVeemZOZs=
 github.com/bytedance/sonic v1.13.1 h1:Jyd5CIvdFnkOWuKXr+wm4Nyk2h0yAFsr8ucJgEasO3g=
 github.com/bytedance/sonic v1.13.1/go.mod h1:o68xyaF9u2gvVBuGHPlUVCy+ZfmNNO5ETf1+KgkJhz4=
+github.com/bytedance/sonic v1.13.2 h1:8/H1FempDZqC4VqjptGo14QQlJx8VdZJegxs6wwfqpQ=
+github.com/bytedance/sonic v1.13.2/go.mod h1:o68xyaF9u2gvVBuGHPlUVCy+ZfmNNO5ETf1+KgkJhz4=
 github.com/bytedance/sonic/loader v0.1.1/go.mod h1:ncP89zfokxS5LZrJxl5z0UJcsk4M4yY2JpfqGeCtNLU=
 github.com/bytedance/sonic/loader v0.2.4 h1:ZWCw4stuXUsn1/+zQDqeE7JKP+QO47tz7QCNan80NzY=
 github.com/bytedance/sonic/loader v0.2.4/go.mod h1:N8A3vUdtUebEY2/VQC0MyhYeKUFosQU6FxH2JmUe6VI=
@@ -27,16 +37,25 @@ github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/dgraph-io/badger/v4 v4.6.0 h1:acOwfOOZ4p1dPRnYzvkVm7rUk2Y21TgPVepCy5dJdFQ=
 github.com/dgraph-io/badger/v4 v4.6.0/go.mod h1:KSJ5VTuZNC3Sd+YhvVjk2nYua9UZnnTr/SkXvdtiPgI=
+github.com/dgraph-io/badger/v4 v4.7.0 h1:Q+J8HApYAY7UMpL8d9owqiB+odzEc0zn/aqOD9jhc6Y=
+github.com/dgraph-io/badger/v4 v4.7.0/go.mod h1:He7TzG3YBy3j4f5baj5B7Zl2XyfNe5bl4Udl0aPemVA=
 github.com/dgraph-io/ristretto/v2 v2.1.0 h1:59LjpOJLNDULHh8MC4UaegN52lC4JnO2dITsie/Pa8I=
 github.com/dgraph-io/ristretto/v2 v2.1.0/go.mod h1:uejeqfYXpUomfse0+lO+13ATz4TypQYLJZzBSAemuB4=
+github.com/dgraph-io/ristretto/v2 v2.2.0 h1:bkY3XzJcXoMuELV8F+vS8kzNgicwQFAaGINAEJdWGOM=
+github.com/dgraph-io/ristretto/v2 v2.2.0/go.mod h1:RZrm63UmcBAaYWC1DotLYBmTvgkrs0+XhBd7Npn7/zI=
 github.com/dgryski/go-farm v0.0.0-20200201041132-a6ae2369ad13 h1:fAjc9m62+UWV/WAFKLNi6ZS0675eEUC9y3AlwSbQu1Y=
 github.com/dgryski/go-farm v0.0.0-20200201041132-a6ae2369ad13/go.mod h1:SqUrOPUnsFjfmXRMNPybcSiG0BgUW2AuFH8PAnS2iTw=
+github.com/dgryski/go-farm v0.0.0-20240924180020-3414d57e47da h1:aIftn67I1fkbMa512G+w+Pxci9hJPB8oMnkcP3iZF38=
 github.com/dustin/go-humanize v1.0.1 h1:GzkhY7T5VNhEkwH0PVJgjz+fX1rhBrR7pRT3mDkpeCY=
 github.com/dustin/go-humanize v1.0.1/go.mod h1:Mu1zIs6XwVuF/gI1OepvI0qD18qycQx+mFykh5fBlto=
 github.com/gabriel-vasile/mimetype v1.4.8 h1:FfZ3gj38NjllZIeJAmMhr+qKL8Wu+nOoI3GqacKw1NM=
 github.com/gabriel-vasile/mimetype v1.4.8/go.mod h1:ByKUIKGjh1ODkGM1asKUbQZOLGrPjydw3hYPU2YU9t8=
+github.com/gabriel-vasile/mimetype v1.4.9 h1:5k+WDwEsD9eTLL8Tz3L0VnmVh9QxGjRmjBvAG7U/oYY=
+github.com/gabriel-vasile/mimetype v1.4.9/go.mod h1:WnSQhFKJuBlRyLiKohA/2DtIlPFAbguNaG7QCHcyGok=
 github.com/gin-contrib/sse v1.0.0 h1:y3bT1mUWUxDpW4JLQg/HnTqV4rozuW4tC9eFKTxYI9E=
 github.com/gin-contrib/sse v1.0.0/go.mod h1:zNuFdwarAygJBht0NTKiSi3jRf6RbqeILZ9Sp6Slhe0=
+github.com/gin-contrib/sse v1.1.0 h1:n0w2GMuUpWDVp7qSpvze6fAu9iRxJY4Hmj6AmBOU05w=
+github.com/gin-contrib/sse v1.1.0/go.mod h1:hxRZ5gVpWMT7Z0B0gSNYqqsSCNIJMjzvm6fqCz9vjwM=
 github.com/gin-gonic/gin v1.10.0 h1:nTuyha1TYqgedzytsKYqna+DfLos46nTv2ygFy86HFU=
 github.com/gin-gonic/gin v1.10.0/go.mod h1:4PMNQiOhvDRa013RKVbsiNwoyezlm2rm0uX/T7kzp5Y=
 github.com/go-logr/logr v1.2.2/go.mod h1:jdQByPbusPIv2/zmleS9BjJVeZ6kBagPoEUsqbVz/1A=
@@ -52,10 +71,13 @@ github.com/go-playground/universal-translator v0.18.1 h1:Bcnm0ZwsGyWbCzImXv+pAJn
 github.com/go-playground/universal-translator v0.18.1/go.mod h1:xekY+UJKNuX9WP91TpwSH2VMlDf28Uj24BCp08ZFTUY=
 github.com/go-playground/validator/v10 v10.25.0 h1:5Dh7cjvzR7BRZadnsVOzPhWsrwUr0nmsZJxEAnFLNO8=
 github.com/go-playground/validator/v10 v10.25.0/go.mod h1:GGzBIJMuE98Ic/kJsBXbz1x/7cByt++cQ+YOuDM5wus=
+github.com/go-playground/validator/v10 v10.26.0 h1:SP05Nqhjcvz81uJaRfEV0YBSSSGMc/iMaVtFbr3Sw2k=
+github.com/go-playground/validator/v10 v10.26.0/go.mod h1:I5QpIEbmr8On7W0TktmJAumgzX4CA1XNl4ZmDuVHKKo=
 github.com/goccy/go-json v0.10.5 h1:Fq85nIqj+gXn/S5ahsiTlK3TmC85qgirsdTP/+DeaC4=
 github.com/goccy/go-json v0.10.5/go.mod h1:oq7eo15ShAhp70Anwd5lgX2pLfOS3QCiwU/PULtXL6M=
 github.com/golang-jwt/jwt/v5 v5.2.1 h1:OuVbFODueb089Lh128TAcimifWaLhJwVflnrgM17wHk=
 github.com/golang-jwt/jwt/v5 v5.2.1/go.mod h1:pqrtFR0X4osieyHYxtmOUWsAWrfe1Q5UVIyoH402zdk=
+github.com/golang-jwt/jwt/v5 v5.2.2 h1:Rl4B7itRWVtYIHFrSNd7vhTiz9UpLdi6gZhZ3wEeDy8=
 github.com/google/flatbuffers v25.2.10+incompatible h1:F3vclr7C3HpB1k9mxCGRMXq6FdUalZ6H/pNX4FP1v0Q=
 github.com/google/flatbuffers v25.2.10+incompatible/go.mod h1:1AeVuKshWv4vARoZatz6mlQ0JxURH0Kv5+zNeJKJCa8=
 github.com/google/go-cmp v0.7.0 h1:wk8382ETsv4JYUZwIsn6YpYiWiBsYLSJiTsyBybVuN8=
@@ -88,6 +110,8 @@ github.com/modern-go/reflect2 v1.0.2 h1:xBagoLtFs94CBntxluKeaWgTMpvLxC4ur3nMaC9G
 github.com/modern-go/reflect2 v1.0.2/go.mod h1:yWuevngMOJpCy52FWWMvUC8ws7m/LJsjYzDa0/r8luk=
 github.com/pelletier/go-toml/v2 v2.2.3 h1:YmeHyLY8mFWbdkNWwpr+qIL2bEqT0o95WSdkNHvL12M=
 github.com/pelletier/go-toml/v2 v2.2.3/go.mod h1:MfCQTFTvCcUyyvvwm1+G6H/jORL20Xlb6rzQu9GuUkc=
+github.com/pelletier/go-toml/v2 v2.2.4 h1:mye9XuhQ6gvn5h28+VilKrrPoQVanw5PMw/TB0t5Ec4=
+github.com/pelletier/go-toml/v2 v2.2.4/go.mod h1:2gIqNv+qfxSVS7cM2xJQKtLSTLUE9V8t9Stt+h56mCY=
 github.com/pkg/browser v0.0.0-20240102092130-5ac0b6a4141c h1:+mdjkGKdHQG3305AYmdv1U2eRNDiU2ErMBj1gwrq8eQ=
 github.com/pkg/browser v0.0.0-20240102092130-5ac0b6a4141c/go.mod h1:7rwL4CYBLnjLxUqIJNnCWiEdr3bn6IUYi15bNlnbCCU=
 github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
@@ -126,19 +150,33 @@ go.opentelemetry.io/otel/trace v1.35.0 h1:dPpEfJu1sDIqruz7BHFG3c7528f6ddfSWfFDVt
 go.opentelemetry.io/otel/trace v1.35.0/go.mod h1:WUk7DtFp1Aw2MkvqGdwiXYDZZNvA/1J8o6xRXLrIkyc=
 golang.org/x/arch v0.15.0 h1:QtOrQd0bTUnhNVNndMpLHNWrDmYzZ2KDqSrEymqInZw=
 golang.org/x/arch v0.15.0/go.mod h1:JmwW7aLIoRUKgaTzhkiEFxvcEiQGyOg9BMonBJUS7EE=
+golang.org/x/arch v0.17.0 h1:4O3dfLzd+lQewptAHqjewQZQDyEdejz3VwgeYwkZneU=
+golang.org/x/arch v0.17.0/go.mod h1:bdwinDaKcfZUGpH09BB7ZmOfhalA8lQdzl62l8gGWsk=
 golang.org/x/crypto v0.36.0 h1:AnAEvhDddvBdpY+uR+MyHmuZzzNqXSe/GvuDeob5L34=
 golang.org/x/crypto v0.36.0/go.mod h1:Y4J0ReaxCR1IMaabaSMugxJES1EpwhBHhv2bDHklZvc=
+golang.org/x/crypto v0.38.0 h1:jt+WWG8IZlBnVbomuhg2Mdq0+BBQaHbtqHEFEigjUV8=
+golang.org/x/crypto v0.38.0/go.mod h1:MvrbAqul58NNYPKnOra203SB9vpuZW0e+RRZV+Ggqjw=
 golang.org/x/exp v0.0.0-20250305212735-054e65f0b394 h1:nDVHiLt8aIbd/VzvPWN6kSOPE7+F/fNFDSXLVYkE/Iw=
 golang.org/x/exp v0.0.0-20250305212735-054e65f0b394/go.mod h1:sIifuuw/Yco/y6yb6+bDNfyeQ/MdPUy/hKEMYQV17cM=
+golang.org/x/exp v0.0.0-20250506013437-ce4c2cf36ca6 h1:y5zboxd6LQAqYIhHnB48p0ByQ/GnQx2BE33L8BOHQkI=
+golang.org/x/exp v0.0.0-20250506013437-ce4c2cf36ca6/go.mod h1:U6Lno4MTRCDY+Ba7aCcauB9T60gsv5s4ralQzP72ZoQ=
 golang.org/x/net v0.37.0 h1:1zLorHbz+LYj7MQlSf1+2tPIIgibq2eL5xkrGk6f+2c=
 golang.org/x/net v0.37.0/go.mod h1:ivrbrMbzFq5J41QOQh0siUuly180yBYtLp+CKbEaFx8=
+golang.org/x/net v0.40.0 h1:79Xs7wF06Gbdcg4kdCCIQArK11Z1hr5POQ6+fIYHNuY=
+golang.org/x/net v0.40.0/go.mod h1:y0hY0exeL2Pku80/zKK7tpntoX23cqL3Oa6njdgRtds=
 golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.31.0 h1:ioabZlmFYtWhL+TRYpcnNlLwhyxaM9kWTDEmfnprqik=
 golang.org/x/sys v0.31.0/go.mod h1:BJP2sWEmIv4KK5OTEluFJCKSidICx8ciO85XgH3Ak8k=
+golang.org/x/sys v0.33.0 h1:q3i8TbbEz+JRD9ywIRlyRAQbM0qF7hu24q3teo2hbuw=
+golang.org/x/sys v0.33.0/go.mod h1:BJP2sWEmIv4KK5OTEluFJCKSidICx8ciO85XgH3Ak8k=
 golang.org/x/text v0.23.0 h1:D71I7dUrlY+VX0gQShAThNGHFxZ13dGLBHQLVl1mJlY=
 golang.org/x/text v0.23.0/go.mod h1:/BLNzu4aZCJ1+kcD0DNRotWKage4q2rGVAg4o22unh4=
+golang.org/x/text v0.25.0 h1:qVyWApTSYLk/drJRO5mDlNYskwQznZmkpV2c8q9zls4=
+golang.org/x/text v0.25.0/go.mod h1:WEdwpYrmk1qmdHvhkSTNPm3app7v4rsT8F2UD6+VHIA=
 google.golang.org/protobuf v1.36.5 h1:tPhr+woSbjfYvY6/GPufUoYizxw1cF/yFoxJ2fmpwlM=
 google.golang.org/protobuf v1.36.5/go.mod h1:9fA7Ob0pmnwhb644+1+CVWFRbNajQ6iRojtC/QF5bRE=
+google.golang.org/protobuf v1.36.6 h1:z1NpPI8ku2WgiWnf+t9wTPsn6eP1L7ksHUlkfLvd9xY=
+google.golang.org/protobuf v1.36.6/go.mod h1:jduwjTPXsFjZGTmRluh+L6NjiWu7pchiJ2/5YcXBHnY=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=

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/datastore/badger_datastore/badger_datastore.go

@@ -1,12 +1,15 @@
 package badgerdatastore
 
 import (
+	"time"
+
 	"github.com/dgraph-io/badger/v4"
 	"github.com/pikami/cosmium/internal/logger"
 )
 
 type BadgerDataStore struct {
-	db *badger.DB
+	db       *badger.DB
+	gcTicker *time.Ticker
 }
 
 type BadgerDataStoreOptions struct {
@@ -15,6 +18,7 @@ type BadgerDataStoreOptions struct {
 
 func NewBadgerDataStore(options BadgerDataStoreOptions) *BadgerDataStore {
 	badgerOpts := badger.DefaultOptions(options.PersistDataFilePath)
+	badgerOpts = badgerOpts.WithLogger(newBadgerLogger())
 	if options.PersistDataFilePath == "" {
 		badgerOpts = badgerOpts.WithInMemory(true)
 	}
@@ -24,12 +28,24 @@ func NewBadgerDataStore(options BadgerDataStoreOptions) *BadgerDataStore {
 		panic(err)
 	}
 
-	return &BadgerDataStore{
-		db: db,
+	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
 }
@@ -38,3 +54,13 @@ 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/json_datastore/array_document_iterator.go

@@ -1,4 +1,4 @@
-package mapdatastore
+package jsondatastore
 
 import "github.com/pikami/cosmium/internal/datastore"
 

internal/datastore/json_datastore/collections.go

@@ -1,4 +1,4 @@
-package mapdatastore
+package jsondatastore
 
 import (
 	"fmt"
@@ -11,7 +11,7 @@ import (
 	"golang.org/x/exp/maps"
 )
 
-func (r *MapDataStore) GetAllCollections(databaseId string) ([]datastore.Collection, datastore.DataStoreStatus) {
+func (r *JsonDataStore) GetAllCollections(databaseId string) ([]datastore.Collection, datastore.DataStoreStatus) {
 	r.storeState.RLock()
 	defer r.storeState.RUnlock()
 
@@ -22,7 +22,7 @@ func (r *MapDataStore) GetAllCollections(databaseId string) ([]datastore.Collect
 	return maps.Values(r.storeState.Collections[databaseId]), datastore.StatusOk
 }
 
-func (r *MapDataStore) GetCollection(databaseId string, collectionId string) (datastore.Collection, datastore.DataStoreStatus) {
+func (r *JsonDataStore) GetCollection(databaseId string, collectionId string) (datastore.Collection, datastore.DataStoreStatus) {
 	r.storeState.RLock()
 	defer r.storeState.RUnlock()
 
@@ -37,7 +37,7 @@ func (r *MapDataStore) GetCollection(databaseId string, collectionId string) (da
 	return r.storeState.Collections[databaseId][collectionId], datastore.StatusOk
 }
 
-func (r *MapDataStore) DeleteCollection(databaseId string, collectionId string) datastore.DataStoreStatus {
+func (r *JsonDataStore) DeleteCollection(databaseId string, collectionId string) datastore.DataStoreStatus {
 	r.storeState.Lock()
 	defer r.storeState.Unlock()
 
@@ -58,7 +58,7 @@ func (r *MapDataStore) DeleteCollection(databaseId string, collectionId string)
 	return datastore.StatusOk
 }
 
-func (r *MapDataStore) CreateCollection(databaseId string, newCollection datastore.Collection) (datastore.Collection, datastore.DataStoreStatus) {
+func (r *JsonDataStore) CreateCollection(databaseId string, newCollection datastore.Collection) (datastore.Collection, datastore.DataStoreStatus) {
 	r.storeState.Lock()
 	defer r.storeState.Unlock()
 

internal/datastore/json_datastore/databases.go

@@ -1,4 +1,4 @@
-package mapdatastore
+package jsondatastore
 
 import (
 	"fmt"
@@ -10,14 +10,14 @@ import (
 	"golang.org/x/exp/maps"
 )
 
-func (r *MapDataStore) GetAllDatabases() ([]datastore.Database, datastore.DataStoreStatus) {
+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 *MapDataStore) GetDatabase(id string) (datastore.Database, datastore.DataStoreStatus) {
+func (r *JsonDataStore) GetDatabase(id string) (datastore.Database, datastore.DataStoreStatus) {
 	r.storeState.RLock()
 	defer r.storeState.RUnlock()
 
@@ -28,7 +28,7 @@ func (r *MapDataStore) GetDatabase(id string) (datastore.Database, datastore.Dat
 	return datastore.Database{}, datastore.StatusNotFound
 }
 
-func (r *MapDataStore) DeleteDatabase(id string) datastore.DataStoreStatus {
+func (r *JsonDataStore) DeleteDatabase(id string) datastore.DataStoreStatus {
 	r.storeState.Lock()
 	defer r.storeState.Unlock()
 
@@ -46,7 +46,7 @@ func (r *MapDataStore) DeleteDatabase(id string) datastore.DataStoreStatus {
 	return datastore.StatusOk
 }
 
-func (r *MapDataStore) CreateDatabase(newDatabase datastore.Database) (datastore.Database, datastore.DataStoreStatus) {
+func (r *JsonDataStore) CreateDatabase(newDatabase datastore.Database) (datastore.Database, datastore.DataStoreStatus) {
 	r.storeState.Lock()
 	defer r.storeState.Unlock()
 

internal/datastore/json_datastore/documents.go

@@ -1,4 +1,4 @@
-package mapdatastore
+package jsondatastore
 
 import (
 	"fmt"
@@ -10,7 +10,7 @@ import (
 	"golang.org/x/exp/maps"
 )
 
-func (r *MapDataStore) GetAllDocuments(databaseId string, collectionId string) ([]datastore.Document, datastore.DataStoreStatus) {
+func (r *JsonDataStore) GetAllDocuments(databaseId string, collectionId string) ([]datastore.Document, datastore.DataStoreStatus) {
 	r.storeState.RLock()
 	defer r.storeState.RUnlock()
 
@@ -25,7 +25,7 @@ func (r *MapDataStore) GetAllDocuments(databaseId string, collectionId string) (
 	return maps.Values(r.storeState.Documents[databaseId][collectionId]), datastore.StatusOk
 }
 
-func (r *MapDataStore) GetDocument(databaseId string, collectionId string, documentId string) (datastore.Document, datastore.DataStoreStatus) {
+func (r *JsonDataStore) GetDocument(databaseId string, collectionId string, documentId string) (datastore.Document, datastore.DataStoreStatus) {
 	r.storeState.RLock()
 	defer r.storeState.RUnlock()
 
@@ -44,7 +44,7 @@ func (r *MapDataStore) GetDocument(databaseId string, collectionId string, docum
 	return r.storeState.Documents[databaseId][collectionId][documentId], datastore.StatusOk
 }
 
-func (r *MapDataStore) DeleteDocument(databaseId string, collectionId string, documentId string) datastore.DataStoreStatus {
+func (r *JsonDataStore) DeleteDocument(databaseId string, collectionId string, documentId string) datastore.DataStoreStatus {
 	r.storeState.Lock()
 	defer r.storeState.Unlock()
 
@@ -65,7 +65,7 @@ func (r *MapDataStore) DeleteDocument(databaseId string, collectionId string, do
 	return datastore.StatusOk
 }
 
-func (r *MapDataStore) CreateDocument(databaseId string, collectionId string, document map[string]interface{}) (datastore.Document, datastore.DataStoreStatus) {
+func (r *JsonDataStore) CreateDocument(databaseId string, collectionId string, document map[string]interface{}) (datastore.Document, datastore.DataStoreStatus) {
 	r.storeState.Lock()
 	defer r.storeState.Unlock()
 
@@ -100,7 +100,7 @@ func (r *MapDataStore) CreateDocument(databaseId string, collectionId string, do
 	return document, datastore.StatusOk
 }
 
-func (r *MapDataStore) GetDocumentIterator(databaseId string, collectionId string) (datastore.DocumentIterator, datastore.DataStoreStatus) {
+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

internal/datastore/json_datastore/map_datastore.go

@@ -1,21 +1,21 @@
-package mapdatastore
+package jsondatastore
 
 import "github.com/pikami/cosmium/internal/datastore"
 
-type MapDataStore struct {
+type JsonDataStore struct {
 	storeState State
 
 	initialDataFilePath string
 	persistDataFilePath string
 }
 
-type MapDataStoreOptions struct {
+type JsonDataStoreOptions struct {
 	InitialDataFilePath string
 	PersistDataFilePath string
 }
 
-func NewMapDataStore(options MapDataStoreOptions) *MapDataStore {
-	dataStore := &MapDataStore{
+func NewJsonDataStore(options JsonDataStoreOptions) *JsonDataStore {
+	dataStore := &JsonDataStore{
 		storeState: State{
 			Databases:            make(map[string]datastore.Database),
 			Collections:          make(map[string]map[string]datastore.Collection),

internal/datastore/json_datastore/partition_key_ranges.go

@@ -1,4 +1,4 @@
-package mapdatastore
+package jsondatastore
 
 import (
 	"fmt"
@@ -9,7 +9,7 @@ import (
 )
 
 // I have no idea what this is tbh
-func (r *MapDataStore) GetPartitionKeyRanges(databaseId string, collectionId string) ([]datastore.PartitionKeyRange, datastore.DataStoreStatus) {
+func (r *JsonDataStore) GetPartitionKeyRanges(databaseId string, collectionId string) ([]datastore.PartitionKeyRange, datastore.DataStoreStatus) {
 	r.storeState.RLock()
 	defer r.storeState.RUnlock()
 

internal/datastore/json_datastore/state.go

@@ -1,4 +1,4 @@
-package mapdatastore
+package jsondatastore
 
 import (
 	"encoding/json"
@@ -33,7 +33,7 @@ type State struct {
 	UserDefinedFunctions map[string]map[string]map[string]datastore.UserDefinedFunction `json:"udfs"`
 }
 
-func (r *MapDataStore) InitializeDataStore() {
+func (r *JsonDataStore) InitializeDataStore() {
 	if r.initialDataFilePath != "" {
 		r.LoadStateFS(r.initialDataFilePath)
 		return
@@ -55,7 +55,7 @@ func (r *MapDataStore) InitializeDataStore() {
 	}
 }
 
-func (r *MapDataStore) LoadStateFS(filePath string) {
+func (r *JsonDataStore) LoadStateFS(filePath string) {
 	data, err := os.ReadFile(filePath)
 	if err != nil {
 		log.Fatalf("Error reading state JSON file: %v", err)
@@ -68,7 +68,7 @@ func (r *MapDataStore) LoadStateFS(filePath string) {
 	}
 }
 
-func (r *MapDataStore) LoadStateJSON(jsonData string) error {
+func (r *JsonDataStore) LoadStateJSON(jsonData string) error {
 	r.storeState.Lock()
 	defer r.storeState.Unlock()
 
@@ -94,7 +94,7 @@ func (r *MapDataStore) LoadStateJSON(jsonData string) error {
 	return nil
 }
 
-func (r *MapDataStore) SaveStateFS(filePath string) {
+func (r *JsonDataStore) SaveStateFS(filePath string) {
 	r.storeState.RLock()
 	defer r.storeState.RUnlock()
 
@@ -115,7 +115,7 @@ func (r *MapDataStore) SaveStateFS(filePath string) {
 	logger.Infof("User defined functions: %d\n", getLength(r.storeState.UserDefinedFunctions))
 }
 
-func (r *MapDataStore) DumpToJson() (string, error) {
+func (r *JsonDataStore) DumpToJson() (string, error) {
 	r.storeState.RLock()
 	defer r.storeState.RUnlock()
 
@@ -129,7 +129,7 @@ func (r *MapDataStore) DumpToJson() (string, error) {
 
 }
 
-func (r *MapDataStore) Close() {
+func (r *JsonDataStore) Close() {
 	if r.persistDataFilePath != "" {
 		r.SaveStateFS(r.persistDataFilePath)
 	}
@@ -163,7 +163,7 @@ func getLength(v interface{}) int {
 	return count
 }
 
-func (r *MapDataStore) ensureStoreStateNoNullReferences() {
+func (r *JsonDataStore) ensureStoreStateNoNullReferences() {
 	if r.storeState.Databases == nil {
 		r.storeState.Databases = make(map[string]datastore.Database)
 	}

internal/datastore/json_datastore/stored_procedures.go

@@ -1,4 +1,4 @@
-package mapdatastore
+package jsondatastore
 
 import (
 	"fmt"
@@ -10,14 +10,14 @@ import (
 	"golang.org/x/exp/maps"
 )
 
-func (r *MapDataStore) GetAllStoredProcedures(databaseId string, collectionId string) ([]datastore.StoredProcedure, datastore.DataStoreStatus) {
+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 *MapDataStore) GetStoredProcedure(databaseId string, collectionId string, spId string) (datastore.StoredProcedure, datastore.DataStoreStatus) {
+func (r *JsonDataStore) GetStoredProcedure(databaseId string, collectionId string, spId string) (datastore.StoredProcedure, datastore.DataStoreStatus) {
 	r.storeState.RLock()
 	defer r.storeState.RUnlock()
 
@@ -36,7 +36,7 @@ func (r *MapDataStore) GetStoredProcedure(databaseId string, collectionId string
 	return datastore.StoredProcedure{}, datastore.StatusNotFound
 }
 
-func (r *MapDataStore) DeleteStoredProcedure(databaseId string, collectionId string, spId string) datastore.DataStoreStatus {
+func (r *JsonDataStore) DeleteStoredProcedure(databaseId string, collectionId string, spId string) datastore.DataStoreStatus {
 	r.storeState.Lock()
 	defer r.storeState.Unlock()
 
@@ -57,7 +57,7 @@ func (r *MapDataStore) DeleteStoredProcedure(databaseId string, collectionId str
 	return datastore.StatusOk
 }
 
-func (r *MapDataStore) CreateStoredProcedure(databaseId string, collectionId string, sp datastore.StoredProcedure) (datastore.StoredProcedure, datastore.DataStoreStatus) {
+func (r *JsonDataStore) CreateStoredProcedure(databaseId string, collectionId string, sp datastore.StoredProcedure) (datastore.StoredProcedure, datastore.DataStoreStatus) {
 	r.storeState.Lock()
 	defer r.storeState.Unlock()
 

internal/datastore/json_datastore/triggers.go

@@ -1,4 +1,4 @@
-package mapdatastore
+package jsondatastore
 
 import (
 	"fmt"
@@ -10,14 +10,14 @@ import (
 	"golang.org/x/exp/maps"
 )
 
-func (r *MapDataStore) GetAllTriggers(databaseId string, collectionId string) ([]datastore.Trigger, datastore.DataStoreStatus) {
+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 *MapDataStore) GetTrigger(databaseId string, collectionId string, triggerId string) (datastore.Trigger, datastore.DataStoreStatus) {
+func (r *JsonDataStore) GetTrigger(databaseId string, collectionId string, triggerId string) (datastore.Trigger, datastore.DataStoreStatus) {
 	r.storeState.RLock()
 	defer r.storeState.RUnlock()
 
@@ -36,7 +36,7 @@ func (r *MapDataStore) GetTrigger(databaseId string, collectionId string, trigge
 	return datastore.Trigger{}, datastore.StatusNotFound
 }
 
-func (r *MapDataStore) DeleteTrigger(databaseId string, collectionId string, triggerId string) datastore.DataStoreStatus {
+func (r *JsonDataStore) DeleteTrigger(databaseId string, collectionId string, triggerId string) datastore.DataStoreStatus {
 	r.storeState.Lock()
 	defer r.storeState.Unlock()
 
@@ -57,7 +57,7 @@ func (r *MapDataStore) DeleteTrigger(databaseId string, collectionId string, tri
 	return datastore.StatusOk
 }
 
-func (r *MapDataStore) CreateTrigger(databaseId string, collectionId string, trigger datastore.Trigger) (datastore.Trigger, datastore.DataStoreStatus) {
+func (r *JsonDataStore) CreateTrigger(databaseId string, collectionId string, trigger datastore.Trigger) (datastore.Trigger, datastore.DataStoreStatus) {
 	r.storeState.Lock()
 	defer r.storeState.Unlock()
 

internal/datastore/json_datastore/user_defined_functions.go

@@ -1,4 +1,4 @@
-package mapdatastore
+package jsondatastore
 
 import (
 	"fmt"
@@ -10,14 +10,14 @@ import (
 	"golang.org/x/exp/maps"
 )
 
-func (r *MapDataStore) GetAllUserDefinedFunctions(databaseId string, collectionId string) ([]datastore.UserDefinedFunction, datastore.DataStoreStatus) {
+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 *MapDataStore) GetUserDefinedFunction(databaseId string, collectionId string, udfId string) (datastore.UserDefinedFunction, datastore.DataStoreStatus) {
+func (r *JsonDataStore) GetUserDefinedFunction(databaseId string, collectionId string, udfId string) (datastore.UserDefinedFunction, datastore.DataStoreStatus) {
 	r.storeState.RLock()
 	defer r.storeState.RUnlock()
 
@@ -36,7 +36,7 @@ func (r *MapDataStore) GetUserDefinedFunction(databaseId string, collectionId st
 	return datastore.UserDefinedFunction{}, datastore.StatusNotFound
 }
 
-func (r *MapDataStore) DeleteUserDefinedFunction(databaseId string, collectionId string, udfId string) datastore.DataStoreStatus {
+func (r *JsonDataStore) DeleteUserDefinedFunction(databaseId string, collectionId string, udfId string) datastore.DataStoreStatus {
 	r.storeState.Lock()
 	defer r.storeState.Unlock()
 
@@ -57,7 +57,7 @@ func (r *MapDataStore) DeleteUserDefinedFunction(databaseId string, collectionId
 	return datastore.StatusOk
 }
 
-func (r *MapDataStore) CreateUserDefinedFunction(databaseId string, collectionId string, udf datastore.UserDefinedFunction) (datastore.UserDefinedFunction, datastore.DataStoreStatus) {
+func (r *JsonDataStore) CreateUserDefinedFunction(databaseId string, collectionId string, udf datastore.UserDefinedFunction) (datastore.UserDefinedFunction, datastore.DataStoreStatus) {
 	r.storeState.Lock()
 	defer r.storeState.Unlock()
 

parsers/models.go

@@ -34,6 +34,8 @@ const (
 	SelectItemTypeConstant
 	SelectItemTypeFunctionCall
 	SelectItemTypeSubQuery
+	SelectItemTypeExpression
+	SelectItemTypeBinaryExpression
 )
 
 type SelectItem struct {
@@ -64,6 +66,12 @@ type ComparisonExpression struct {
 	Operation string
 }
 
+type BinaryExpression struct {
+	Left      interface{}
+	Right     interface{}
+	Operation string
+}
+
 type ConstantType int
 
 const (
@@ -134,6 +142,8 @@ const (
 	FunctionCallSetIntersect     FunctionCallType = "SetIntersect"
 	FunctionCallSetUnion         FunctionCallType = "SetUnion"
 
+	FunctionCallIif FunctionCallType = "Iif"
+
 	FunctionCallMathAbs              FunctionCallType = "MathAbs"
 	FunctionCallMathAcos             FunctionCallType = "MathAcos"
 	FunctionCallMathAsin             FunctionCallType = "MathAsin"

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/misc_test.go

@@ -163,4 +163,27 @@ func Test_Parse(t *testing.T) {
 			},
 		)
 	})
+
+	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

@@ -4,137 +4,137 @@ package nosql
 import "github.com/pikami/cosmium/parsers"
 
 func makeSelectStmt(
-	columns, fromClause, joinItems,
-	whereClause interface{}, distinctClause interface{},
-	count interface{}, groupByClause interface{}, orderList interface{},
-	offsetClause interface{},
+    columns, fromClause, joinItems,
+    whereClause interface{}, distinctClause interface{},
+    count interface{}, groupByClause interface{}, orderList interface{},
+    offsetClause interface{},
 ) (parsers.SelectStmt, error) {
-	selectStmt := parsers.SelectStmt{
-		SelectItems: columns.([]parsers.SelectItem),
-	}
+    selectStmt := parsers.SelectStmt{
+        SelectItems: columns.([]parsers.SelectItem),
+    }
 
     if fromTable, ok := fromClause.(parsers.Table); ok {
         selectStmt.Table = fromTable
     }
 
     if joinItemsArray, ok := joinItems.([]interface{}); ok && len(joinItemsArray) > 0 {
-		selectStmt.JoinItems = make([]parsers.JoinItem, len(joinItemsArray))
-		for i, joinItem := range joinItemsArray {
-			selectStmt.JoinItems[i] = joinItem.(parsers.JoinItem)
-		}
-	}
+        selectStmt.JoinItems = make([]parsers.JoinItem, len(joinItemsArray))
+        for i, joinItem := range joinItemsArray {
+            selectStmt.JoinItems[i] = joinItem.(parsers.JoinItem)
+        }
+    }
 
-	switch v := whereClause.(type) {
-	case parsers.ComparisonExpression, parsers.LogicalExpression, parsers.Constant, parsers.SelectItem:
-		selectStmt.Filters = v
-	}
+    switch v := whereClause.(type) {
+    case parsers.ComparisonExpression, parsers.LogicalExpression, parsers.Constant, parsers.SelectItem:
+        selectStmt.Filters = v
+    }
 
-	if distinctClause != nil {
-		selectStmt.Distinct = true
-	}
+    if distinctClause != nil {
+        selectStmt.Distinct = true
+    }
 
-	if n, ok := count.(int); ok {
-		selectStmt.Count = n
-	}
+    if n, ok := count.(int); ok {
+        selectStmt.Count = n
+    }
 
-	if offsetArr, ok := offsetClause.([]interface{}); ok && len(offsetArr) == 2 {
-		if n, ok := offsetArr[0].(int); ok {
-			selectStmt.Offset = n
-		}
+    if offsetArr, ok := offsetClause.([]interface{}); ok && len(offsetArr) == 2 {
+        if n, ok := offsetArr[0].(int); ok {
+            selectStmt.Offset = n
+        }
 
-		if n, ok := offsetArr[1].(int); ok {
-			selectStmt.Count = n
-		}
-	}
+        if n, ok := offsetArr[1].(int); ok {
+            selectStmt.Count = n
+        }
+    }
 
-	if orderExpressions, ok := orderList.([]parsers.OrderExpression); ok {
-		selectStmt.OrderExpressions = orderExpressions
-	}
+    if orderExpressions, ok := orderList.([]parsers.OrderExpression); ok {
+        selectStmt.OrderExpressions = orderExpressions
+    }
 
-	if groupByClause != nil {
-		selectStmt.GroupBy = groupByClause.([]parsers.SelectItem)
-	}
+    if groupByClause != nil {
+        selectStmt.GroupBy = groupByClause.([]parsers.SelectItem)
+    }
 
-	return selectStmt, nil
+    return selectStmt, nil
 }
 
 func makeJoin(table interface{}, column interface{}) (parsers.JoinItem, error) {
-	joinItem := parsers.JoinItem{}
+    joinItem := parsers.JoinItem{}
 
-	if selectItem, isSelectItem := column.(parsers.SelectItem); isSelectItem {
-		joinItem.SelectItem = selectItem
-		joinItem.Table.Value = selectItem.Alias
-	}
+    if selectItem, isSelectItem := column.(parsers.SelectItem); isSelectItem {
+        joinItem.SelectItem = selectItem
+        joinItem.Table.Value = selectItem.Alias
+    }
 
-	if tableTyped, isTable := table.(parsers.Table); isTable {
-		joinItem.Table = tableTyped
-	}
+    if tableTyped, isTable := table.(parsers.Table); isTable {
+        joinItem.Table = tableTyped
+    }
 
-	return joinItem, nil
+    return joinItem, nil
 }
 
 func makeSelectItem(name interface{}, path interface{}, selectItemType parsers.SelectItemType) (parsers.SelectItem, error) {
-	ps := path.([]interface{})
+    ps := path.([]interface{})
 
-	paths := make([]string, 1)
+    paths := make([]string, 1)
     paths[0] = name.(string)
-	for _, p := range ps {
+    for _, p := range ps {
         paths = append(paths, p.(string))
-	}
+    }
 
-	return parsers.SelectItem{Path: paths, Type: selectItemType}, nil
+    return parsers.SelectItem{Path: paths, Type: selectItemType}, nil
 }
 
 func makeColumnList(column interface{}, other_columns interface{}) ([]parsers.SelectItem, error) {
     collsAsArray := other_columns.([]interface{})
-	columnList := make([]parsers.SelectItem, len(collsAsArray) + 1)
-	columnList[0] = column.(parsers.SelectItem)
+    columnList := make([]parsers.SelectItem, len(collsAsArray) + 1)
+    columnList[0] = column.(parsers.SelectItem)
 
-	for i, v := range collsAsArray {
+    for i, v := range collsAsArray {
         if col, ok := v.(parsers.SelectItem); ok {
-			columnList[i+1] = col
+            columnList[i+1] = col
         }
     }
 
-	return columnList, nil
+    return columnList, nil
 }
 
 func makeSelectArray(columns interface{}) (parsers.SelectItem, error) {
-	return parsers.SelectItem{
-		SelectItems: columns.([]parsers.SelectItem),
-		Type:        parsers.SelectItemTypeArray,
-	}, nil
+    return parsers.SelectItem{
+        SelectItems: columns.([]parsers.SelectItem),
+        Type:        parsers.SelectItemTypeArray,
+    }, nil
 }
 
 func makeSelectObject(field interface{}, other_fields interface{}) (parsers.SelectItem, error) {
     fieldsAsArray := other_fields.([]interface{})
-	fieldsList := make([]parsers.SelectItem, len(fieldsAsArray)+1)
-	fieldsList[0] = field.(parsers.SelectItem)
+    fieldsList := make([]parsers.SelectItem, len(fieldsAsArray)+1)
+    fieldsList[0] = field.(parsers.SelectItem)
 
-	for i, v := range fieldsAsArray {
-		if col, ok := v.(parsers.SelectItem); ok {
-			fieldsList[i+1] = col
-		}
-	}
+    for i, v := range fieldsAsArray {
+        if col, ok := v.(parsers.SelectItem); ok {
+            fieldsList[i+1] = col
+        }
+    }
 
-	return parsers.SelectItem{
-		SelectItems: fieldsList,
-		Type:        parsers.SelectItemTypeObject,
-	}, nil
+    return parsers.SelectItem{
+        SelectItems: fieldsList,
+        Type:        parsers.SelectItemTypeObject,
+    }, nil
 }
 
 func makeOrderByClause(ex1 interface{}, others interface{}) ([]parsers.OrderExpression, error) {
     othersArray := others.([]interface{})
-	orderList := make([]parsers.OrderExpression, len(othersArray)+1)
-	orderList[0] = ex1.(parsers.OrderExpression)
+    orderList := make([]parsers.OrderExpression, len(othersArray)+1)
+    orderList[0] = ex1.(parsers.OrderExpression)
 
-	for i, v := range othersArray {
-		if col, ok := v.(parsers.OrderExpression); ok {
-			orderList[i+1] = col
-		}
-	}
+    for i, v := range othersArray {
+        if col, ok := v.(parsers.OrderExpression); ok {
+            orderList[i+1] = col
+        }
+    }
 
-	return orderList, nil
+    return orderList, nil
 }
 
 func makeOrderExpression(field interface{}, order interface{}) (parsers.OrderExpression, error) {
@@ -144,8 +144,8 @@ func makeOrderExpression(field interface{}, order interface{}) (parsers.OrderExp
     }
 
     if orderValue, ok := order.(parsers.OrderDirection); ok {
-		value.Direction = orderValue
-	}
+        value.Direction = orderValue
+    }
 
     return value, nil
 }
@@ -169,13 +169,39 @@ func joinStrings(array []interface{}) string {
 
 func combineExpressions(ex1 interface{}, exs interface{}, operation parsers.LogicalExpressionType) (interface{}, error) {
     if exs == nil || len(exs.([]interface{})) < 1 {
-		return ex1, nil
-	}
+        return ex1, nil
+    }
 
-	return parsers.LogicalExpression{
-		Expressions: append([]interface{}{ex1}, exs.([]interface{})...),
-		Operation:   operation,
-	}, nil
+    return parsers.LogicalExpression{
+        Expressions: append([]interface{}{ex1}, exs.([]interface{})...),
+        Operation:   operation,
+    }, 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
 }
 
 }
@@ -204,16 +230,16 @@ TopClause <- Top ws count:Integer {
     return count, nil
 }
 
-FromClause <- From ws table:TableName selectItem:(ws In 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.SelectItem = selectItem.(parsers.SelectItem)
         tableTyped.IsInSelect = true
-	}
+    }
 
-	return tableTyped, nil
-} / From ws column:SelectItem {
+    return tableTyped, nil
+} / From ws column:SelectItemWithAlias {
     tableSelectItem := column.(parsers.SelectItem)
     table := parsers.Table{
         Value: tableSelectItem.Alias,
@@ -222,11 +248,11 @@ FromClause <- From ws table:TableName selectItem:(ws In ws column:SelectItem { r
     return table, nil
 } / From ws subQuery:SubQuerySelectItem {
     subQueryTyped := subQuery.(parsers.SelectItem)
-	table := parsers.Table{
-		Value: subQueryTyped.Alias,
-		SelectItem: subQueryTyped,
-	}
-	return table, nil
+    table := parsers.Table{
+        Value: subQueryTyped.Alias,
+        SelectItem: subQueryTyped,
+    }
+    return table, nil
 }
 
 SubQuery <- exists:(exists:Exists ws { return exists, nil })? "(" ws selectStmt:SelectStmt ws ")" {
@@ -251,7 +277,7 @@ SubQuerySelectItem <- subQuery:SubQuery asClause:(ws alias:AsClause { return ali
     return selectItem, nil
 }
 
-JoinClause <- Join ws table:TableName ws In 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)
@@ -265,17 +291,40 @@ Selection <- SelectValueSpec / ColumnList / SelectAsterisk
 
 SelectAsterisk <- "*" {
     selectItem, _ := makeSelectItem("c", make([]interface{}, 0), parsers.SelectItemTypeField)
-	selectItem.IsTopLevel = true
+    selectItem.IsTopLevel = true
     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
+    selectItem.IsTopLevel = true
     return makeColumnList(selectItem, make([]interface{}, 0))
 }
 
@@ -289,19 +338,32 @@ 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 {
     item := selectItem.(parsers.SelectItem)
-	item.Alias = name.(string)
-	return item, nil
+    item.Alias = name.(string)
+    return item, nil
 }
 
 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:
@@ -318,11 +380,7 @@ SelectItem <- selectItem:(SubQuerySelectItem / Literal / FunctionCall / SelectAr
         }
     }
 
-	if aliasValue, ok := asClause.(string); ok {
-		itemResult.Alias = aliasValue
-	}
-
-	return itemResult, nil
+    return itemResult, nil
 }
 
 AsClause <- (ws As)? ws !ExcludedKeywords alias:Identifier {
@@ -355,15 +413,25 @@ AndExpression <- ex1:ComparisonExpression ex2:(ws And ws ex:ComparisonExpression
     return combineExpressions(ex1, ex2, parsers.LogicalExpressionTypeAnd)
 }
 
-ComparisonExpression <- "(" ws ex:OrExpression ws ")" { return ex, nil }
-    / left:SelectItem ws op:ComparisonOperator ws right:SelectItem {
+ComparisonExpression <- left:AddSubExpression ws op:ComparisonOperator ws right:AddSubExpression {
     return parsers.ComparisonExpression{Left:left,Right:right,Operation:op.(string)}, nil
-} / inv:(Not ws)? ex:SelectItem {
+} / 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
-	}
+        ex1 := ex.(parsers.SelectItem)
+        ex1.Invert = true
+        return ex1, nil
+    }
     return ex, nil
 } / ex:BooleanLiteral { return ex, nil }
 
@@ -377,10 +445,10 @@ OrderExpression <- field:SelectProperty ws order:OrderDirection? {
 
 OrderDirection <- ("ASC"i / "DESC"i) {
     if strings.EqualFold(string(c.text), "DESC") {
-		return parsers.OrderDirectionDesc, nil
+        return parsers.OrderDirectionDesc, nil
     }
 
-	return parsers.OrderDirectionAsc, nil
+    return parsers.OrderDirectionAsc, nil
 }
 
 Select <- "SELECT"i
@@ -415,6 +483,10 @@ 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 {
@@ -442,6 +514,7 @@ BooleanLiteral <- ("true"i / "false"i) {
 FunctionCall <- StringFunctions
     / TypeCheckingFunctions
     / ArrayFunctions
+    / ConditionalFunctions
     / InFunction
     / AggregateFunctions
     / MathFunctions
@@ -489,6 +562,8 @@ ArrayFunctions <- ArrayConcatExpression
     / SetIntersectExpression
     / SetUnionExpression
 
+ConditionalFunctions <- IifExpression
+
 MathFunctions <- MathAbsExpression
     / MathAcosExpression
     / MathAsinExpression
@@ -681,6 +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}) }

parsers/nosql/select_test.go

@@ -178,4 +178,90 @@ func Test_Parse_Select(t *testing.T) {
 			},
 		)
 	})
+
+	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")},
+			},
+		)
+	})
 }

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/common.go

@@ -69,6 +69,28 @@ func (r rowContext) resolveSelectItem(selectItem parsers.SelectItem) interface{}
 		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)
 }
 
@@ -209,6 +231,9 @@ func (r rowContext) selectItem_SelectItemTypeFunctionCall(functionCall parsers.F
 	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:
@@ -301,6 +326,45 @@ func (r rowContext) selectItem_SelectItemTypeFunctionCall(functionCall parsers.F
 	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]]
 
@@ -336,6 +400,7 @@ func (r rowContext) selectItem_SelectItemTypeField(selectItem parsers.SelectItem
 }
 
 func compareValues(val1, val2 interface{}) int {
+	// Handle nil values
 	if val1 == nil && val2 == nil {
 		return 0
 	} else if val1 == nil {
@@ -344,27 +409,24 @@ func compareValues(val1, val2 interface{}) int {
 		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 int:
-		val2 := val2.(int)
-		if val1 < val2 {
-			return -1
-		} else if val1 > val2 {
-			return 1
-		}
-		return 0
-	case float64:
-		val2 := val2.(float64)
-		if val1 < val2 {
-			return -1
-		} else if val1 > val2 {
-			return 1
-		}
-		return 0
 	case string:
 		val2 := val2.(string)
 		return strings.Compare(val1, val2)

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/math_functions.go

@@ -605,10 +605,30 @@ func numToInt(ex interface{}) (int, bool) {
 
 func numToFloat64(num interface{}) (float64, bool) {
 	switch val := num.(type) {
-	case float64:
-		return val, true
 	case int:
 		return float64(val), true
+	case int8:
+		return float64(val), true
+	case int16:
+		return float64(val), true
+	case int32:
+		return float64(val), true
+	case int64:
+		return float64(val), true
+	case uint:
+		return float64(val), true
+	case uint8:
+		return float64(val), true
+	case uint16:
+		return float64(val), true
+	case uint32:
+		return float64(val), true
+	case uint64:
+		return float64(val), true
+	case float32:
+		return float64(val), true
+	case float64:
+		return val, true
 	default:
 		return 0, false
 	}

query_executors/memory_executor/misc_functions.go

@@ -16,3 +16,16 @@ func (r rowContext) misc_In(arguments []interface{}) bool {
 
 	return false
 }
+
+func (r rowContext) misc_Iif(arguments []interface{}) interface{} {
+	if len(arguments) != 3 {
+		return nil
+	}
+
+	condition := r.resolveSelectItem(arguments[0].(parsers.SelectItem))
+	if condition != nil && condition == true {
+		return r.resolveSelectItem(arguments[1].(parsers.SelectItem))
+	}
+
+	return r.resolveSelectItem(arguments[2].(parsers.SelectItem))
+}

query_executors/memory_executor/misc_test.go

@@ -210,4 +210,35 @@ func Test_Execute(t *testing.T) {
 			},
 		)
 	})
+
+	t.Run("Should execute function IIF()", func(t *testing.T) {
+		testQueryExecute(
+			t,
+			parsers.SelectStmt{
+				SelectItems: []parsers.SelectItem{
+					testutils.SelectItem_Path("c", "id"),
+					{
+						Alias: "coolness",
+						Type:  parsers.SelectItemTypeFunctionCall,
+						Value: parsers.FunctionCall{
+							Type: parsers.FunctionCallIif,
+							Arguments: []interface{}{
+								testutils.SelectItem_Path("c", "isCool"),
+								testutils.SelectItem_Constant_String("real cool"),
+								testutils.SelectItem_Constant_String("not cool"),
+							},
+						},
+					},
+				},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
+			},
+			mockData,
+			[]memoryexecutor.RowType{
+				map[string]interface{}{"id": "12345", "coolness": "not cool"},
+				map[string]interface{}{"id": "67890", "coolness": "real cool"},
+				map[string]interface{}{"id": "456", "coolness": "real cool"},
+				map[string]interface{}{"id": "123", "coolness": "real cool"},
+			},
+		)
+	})
 }

query_executors/memory_executor/select_test.go

@@ -205,4 +205,27 @@ func Test_Execute_Select(t *testing.T) {
 			},
 		)
 	})
+
+	t.Run("Should execute SELECT empty object", func(t *testing.T) {
+		testQueryExecute(
+			t,
+			parsers.SelectStmt{
+				SelectItems: []parsers.SelectItem{
+					{
+						Alias:       "obj",
+						Type:        parsers.SelectItemTypeObject,
+						SelectItems: []parsers.SelectItem{},
+					},
+				},
+				Table: parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
+			},
+			mockData,
+			[]memoryexecutor.RowType{
+				map[string]interface{}{"obj": map[string]interface{}{}},
+				map[string]interface{}{"obj": map[string]interface{}{}},
+				map[string]interface{}{"obj": map[string]interface{}{}},
+				map[string]interface{}{"obj": map[string]interface{}{}},
+			},
+		)
+	})
 }

sharedlibrary/sharedlibrary.go

@@ -13,7 +13,7 @@ import (
 	"github.com/pikami/cosmium/api/config"
 	"github.com/pikami/cosmium/internal/datastore"
 	badgerdatastore "github.com/pikami/cosmium/internal/datastore/badger_datastore"
-	mapdatastore "github.com/pikami/cosmium/internal/datastore/map_datastore"
+	jsondatastore "github.com/pikami/cosmium/internal/datastore/json_datastore"
 )
 
 //export CreateServerInstance
@@ -41,7 +41,7 @@ func CreateServerInstance(serverName *C.char, configurationJSON *C.char) int {
 			PersistDataFilePath: configuration.PersistDataFilePath,
 		})
 	default:
-		dataStore = mapdatastore.NewMapDataStore(mapdatastore.MapDataStoreOptions{
+		dataStore = jsondatastore.NewJsonDataStore(jsondatastore.JsonDataStoreOptions{
 			InitialDataFilePath: configuration.InitialDataFilePath,
 			PersistDataFilePath: configuration.PersistDataFilePath,
 		})
@@ -96,8 +96,8 @@ func LoadServerInstanceState(serverName *C.char, stateJSON *C.char) int {
 	stateJSONStr := C.GoString(stateJSON)
 
 	if serverInstance, ok := getInstance(serverNameStr); ok {
-		if mapDS, ok := serverInstance.dataStore.(*mapdatastore.MapDataStore); ok {
-			err := mapDS.LoadStateJSON(stateJSONStr)
+		if jsonDS, ok := serverInstance.dataStore.(*jsondatastore.JsonDataStore); ok {
+			err := jsonDS.LoadStateJSON(stateJSONStr)
 			if err != nil {
 				return ResponseFailedToLoadState
 			}