Code cleanup; Implement persistant storage; Use maps for storage

api/config/config.go

@@ -14,12 +14,13 @@ var Config = ServerConfig{}
 func ParseFlags() {
 	host := flag.String("Host", "localhost", "Hostname")
 	port := flag.Int("Port", 8081, "Listen port")
-	explorerPath := flag.String("ExplorerDir", "/home/pk/pro/cosmos-explorer/dist", "Path to cosmos-explorer files")
+	explorerPath := flag.String("ExplorerDir", "", "Path to cosmos-explorer files")
-	tlsCertificatePath := flag.String("Cert", "../example.crt", "Hostname")
+	tlsCertificatePath := flag.String("Cert", "", "Hostname")
-	tlsCertificateKey := flag.String("CertKey", "../example.key", "Hostname")
+	tlsCertificateKey := flag.String("CertKey", "", "Hostname")
 	initialDataPath := flag.String("InitialData", "", "Path to JSON containing initial state")
 	accountKey := flag.String("AccountKey", DefaultAccountKey, "Account key for authentication")
 	disableAuthentication := flag.Bool("DisableAuth", false, "Disable authentication")
+	persistDataPath := flag.String("Persist", "", "Saves data to given path on application exit")
 
 	flag.Parse()
 
@@ -28,7 +29,8 @@ func ParseFlags() {
 	Config.ExplorerPath = *explorerPath
 	Config.TLS_CertificatePath = *tlsCertificatePath
 	Config.TLS_CertificateKey = *tlsCertificateKey
-	Config.DataFilePath = *initialDataPath
+	Config.InitialDataFilePath = *initialDataPath
+	Config.PersistDataFilePath = *persistDataPath
 	Config.DisableAuth = *disableAuthentication
 
 	Config.DatabaseAccount = Config.Host

api/config/models.go

@@ -11,6 +11,7 @@ type ServerConfig struct {
 	Host                string
 	TLS_CertificatePath string
 	TLS_CertificateKey  string
-	DataFilePath        string
+	InitialDataFilePath string
+	PersistDataFilePath string
 	DisableAuth         bool
 }

api/handlers/databases.go

@@ -65,14 +65,14 @@ func CreateDatabase(c *gin.Context) {
 		return
 	}
 
-	status := repositories.CreateDatabase(newDatabase)
+	createdDatabase, status := repositories.CreateDatabase(newDatabase)
 	if status == repositorymodels.Conflict {
 		c.IndentedJSON(http.StatusConflict, gin.H{"message": "Conflict"})
 		return
 	}
 
 	if status == repositorymodels.StatusOk {
-		c.IndentedJSON(http.StatusCreated, newDatabase)
+		c.IndentedJSON(http.StatusCreated, createdDatabase)
 		return
 	}
 

api/handlers/documents.go

@@ -78,14 +78,14 @@ func ReplaceDocument(c *gin.Context) {
 		return
 	}
 
-	status = repositories.CreateDocument(databaseId, collectionId, requestBody)
+	createdDocument, status := repositories.CreateDocument(databaseId, collectionId, requestBody)
 	if status == repositorymodels.Conflict {
 		c.IndentedJSON(http.StatusConflict, gin.H{"message": "Conflict"})
 		return
 	}
 
 	if status == repositorymodels.StatusOk {
-		c.IndentedJSON(http.StatusCreated, requestBody)
+		c.IndentedJSON(http.StatusCreated, createdDocument)
 		return
 	}
 
@@ -114,7 +114,6 @@ func DocumentsPost(c *gin.Context) {
 			queryParameters = parametersToMap(paramsArray)
 		}
 
-		// TODO: Handle these {"query":"select c.id, c._self, c._rid, c._ts, [c[\"pk\"]] as _partitionKeyValue from c"}
 		docs, status := repositories.ExecuteQueryDocuments(databaseId, collectionId, query.(string), queryParameters)
 		if status != repositorymodels.StatusOk {
 			// TODO: Currently we return everything if the query fails
@@ -131,14 +130,14 @@ func DocumentsPost(c *gin.Context) {
 		return
 	}
 
-	status := repositories.CreateDocument(databaseId, collectionId, requestBody)
+	createdDocument, status := repositories.CreateDocument(databaseId, collectionId, requestBody)
 	if status == repositorymodels.Conflict {
 		c.IndentedJSON(http.StatusConflict, gin.H{"message": "Conflict"})
 		return
 	}
 
 	if status == repositorymodels.StatusOk {
-		c.IndentedJSON(http.StatusCreated, requestBody)
+		c.IndentedJSON(http.StatusCreated, createdDocument)
 		return
 	}
 

api/handlers/explorer.go

@@ -24,6 +24,9 @@ func RegisterExplorerHandlers(router *gin.Engine) {
 				ctx.Next()
 			}
 		})
+
+		if config.Config.ExplorerPath != "" {
 			explorer.Static("/", config.Config.ExplorerPath)
 		}
+	}
 }

api/tests/collections_test.go

@@ -25,6 +25,7 @@ func Test_Collections(t *testing.T) {
 	)
 	assert.Nil(t, err)
 
+	repositories.CreateDatabase(repositorymodels.Database{ID: testDatabaseName})
 	databaseClient, err := client.NewDatabase(testDatabaseName)
 	assert.Nil(t, err)
 

api/tests/config_test.go

@@ -9,6 +9,7 @@ import (
 
 func runTestServer() *httptest.Server {
 	config.Config.AccountKey = config.DefaultAccountKey
+	config.Config.ExplorerPath = "/tmp/nothing"
 
 	return httptest.NewServer(api.CreateRouter())
 }

api/tests/documents_test.go

@@ -50,6 +50,7 @@ func testCosmosQuery(t *testing.T,
 }
 
 func Test_Documents(t *testing.T) {
+	repositories.CreateDatabase(repositorymodels.Database{ID: testDatabaseName})
 	repositories.CreateCollection(testDatabaseName, repositorymodels.Collection{
 		ID: testCollectionName,
 		PartitionKey: struct {
@@ -77,7 +78,7 @@ func Test_Documents(t *testing.T) {
 
 	t.Run("Should query document", func(t *testing.T) {
 		testCosmosQuery(t, collectionClient,
-			"SELECT c.id, c[\"pk\"] FROM c",
+			"SELECT c.id, c[\"pk\"] FROM c ORDER BY c.id",
 			nil,
 			[]interface{}{
 				map[string]interface{}{"id": "12345", "pk": "123"},
@@ -88,7 +89,7 @@ func Test_Documents(t *testing.T) {
 
 	t.Run("Should query VALUE array", func(t *testing.T) {
 		testCosmosQuery(t, collectionClient,
-			"SELECT VALUE [c.id, c[\"pk\"]] FROM c",
+			"SELECT VALUE [c.id, c[\"pk\"]] FROM c ORDER BY c.id",
 			nil,
 			[]interface{}{
 				[]interface{}{"12345", "123"},
@@ -99,7 +100,7 @@ func Test_Documents(t *testing.T) {
 
 	t.Run("Should query VALUE object", func(t *testing.T) {
 		testCosmosQuery(t, collectionClient,
-			"SELECT VALUE { id: c.id, _pk: c.pk } FROM c",
+			"SELECT VALUE { id: c.id, _pk: c.pk } FROM c ORDER BY c.id",
 			nil,
 			[]interface{}{
 				map[string]interface{}{"id": "12345", "_pk": "123"},
@@ -112,7 +113,8 @@ func Test_Documents(t *testing.T) {
 		testCosmosQuery(t, collectionClient,
 			`select c.id
 			FROM c
-			WHERE c.isCool=true`,
+			WHERE c.isCool=true
+			ORDER BY c.id`,
 			nil,
 			[]interface{}{
 				map[string]interface{}{"id": "67890"},
@@ -124,7 +126,8 @@ func Test_Documents(t *testing.T) {
 		testCosmosQuery(t, collectionClient,
 			`select c.id
 			FROM c
-			WHERE c.id=@param_id`,
+			WHERE c.id=@param_id
+			ORDER BY c.id`,
 			[]azcosmos.QueryParameter{
 				{Name: "@param_id", Value: "67890"},
 			},

go.mod

@@ -8,6 +8,7 @@ require (
 	github.com/gin-gonic/gin v1.9.1
 	github.com/google/uuid v1.1.1
 	github.com/stretchr/testify v1.8.4
+	golang.org/x/exp v0.0.0-20240222234643-814bf88cf225
 )
 
 require (

go.sum

@@ -38,8 +38,9 @@ github.com/goccy/go-json v0.10.2/go.mod h1:6MelG93GURQebXPDq3khkgXZkazVtN9CRI+MG
 github.com/golang-jwt/jwt v3.2.1+incompatible h1:73Z+4BJcrTC+KczS6WvTPvRGOp1WmfEP4Q1lOd9Z/+c=
 github.com/golang-jwt/jwt v3.2.1+incompatible/go.mod h1:8pz2t5EyA70fFQQSrl6XZXzqecmYZeUEB8OUGHkxJ+I=
 github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
-github.com/google/go-cmp v0.5.5 h1:Khx7svrCpmxxtHBq5j2mp/xVjsi8hQMfNLvJFAlrGgU=
 github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
+github.com/google/go-cmp v0.5.8 h1:e6P7q2lk1O+qJJb4BtCQXlK8vWEO8V1ZeuEdJNOqZyg=
+github.com/google/go-cmp v0.5.8/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
 github.com/google/uuid v1.1.1 h1:Gkbcsh/GbpXz7lPftLA3P6TYMwjCLYm83jiFQZF/3gY=
 github.com/google/uuid v1.1.1/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
@@ -86,6 +87,8 @@ golang.org/x/arch v0.3.0 h1:02VY4/ZcO/gBOH6PUaoiptASxtXU10jazRCP865E97k=
 golang.org/x/arch v0.3.0/go.mod h1:5om86z9Hs0C8fWVUuoMHwpExlXzs5Tkyp9hOrfG7pp8=
 golang.org/x/crypto v0.18.0 h1:PGVlW0xEltQnzFZ55hkuX5+KLyrMYhHld1YHO4AKcdc=
 golang.org/x/crypto v0.18.0/go.mod h1:R0j02AL6hcrfOiy9T4ZYp/rcWeMxM3L6QYxlOuEG1mg=
+golang.org/x/exp v0.0.0-20240222234643-814bf88cf225 h1:LfspQV/FYTatPTr/3HzIcmiUFH7PGP+OQ6mgDYo3yuQ=
+golang.org/x/exp v0.0.0-20240222234643-814bf88cf225/go.mod h1:CxmFvTBINI24O/j8iY7H1xHzx2i4OsyguNBmN/uPtqc=
 golang.org/x/net v0.20.0 h1:aCL9BSgETF1k+blQaYUBx9hJ9LOGP3gAVemcZlf1Kpo=
 golang.org/x/net v0.20.0/go.mod h1:z8BVo6PvndSri0LbOE3hAn0apkU+1YvI6E70E9jsnvY=
 golang.org/x/sys v0.0.0-20220704084225-05e143d24a9e/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
@@ -94,7 +97,6 @@ golang.org/x/sys v0.16.0 h1:xWw16ngr6ZMtmxDyKyIgsE93KNKz5HKmMa3b8ALHidU=
 golang.org/x/sys v0.16.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 golang.org/x/text v0.14.0 h1:ScX5w1eTa3QqT8oi6+ziP7dTV1S2+ALU0bI+0zXKWiQ=
 golang.org/x/text v0.14.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
-golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
 google.golang.org/protobuf v1.30.0 h1:kPPoIgf3TsEvrm0PFe15JQ+570QVxYzEvvHqChK+cng=

internal/repositories/collections.go

@@ -7,48 +7,50 @@ import (
 	"github.com/google/uuid"
 	repositorymodels "github.com/pikami/cosmium/internal/repository_models"
 	structhidrators "github.com/pikami/cosmium/internal/struct_hidrators"
+	"golang.org/x/exp/maps"
 )
 
-var collections = []repositorymodels.Collection{}
-
 func GetAllCollections(databaseId string) ([]repositorymodels.Collection, repositorymodels.RepositoryStatus) {
-	dbCollections := make([]repositorymodels.Collection, 0)
+	if _, ok := storeState.Databases[databaseId]; !ok {
-
+		return make([]repositorymodels.Collection, 0), repositorymodels.StatusNotFound
-	for _, coll := range collections {
-		if coll.Internals.DatabaseId == databaseId {
-			dbCollections = append(dbCollections, coll)
-		}
 	}
 
-	return dbCollections, repositorymodels.StatusOk
+	return maps.Values(storeState.Collections[databaseId]), repositorymodels.StatusOk
 }
 
-func GetCollection(databaseId string, id string) (repositorymodels.Collection, repositorymodels.RepositoryStatus) {
+func GetCollection(databaseId string, collectionId string) (repositorymodels.Collection, repositorymodels.RepositoryStatus) {
-	for _, coll := range collections {
+	if _, ok := storeState.Databases[databaseId]; !ok {
-		if coll.Internals.DatabaseId == databaseId && coll.ID == id {
-			return coll, repositorymodels.StatusOk
-		}
-	}
-
 		return repositorymodels.Collection{}, repositorymodels.StatusNotFound
+	}
+
+	if _, ok := storeState.Collections[databaseId][collectionId]; !ok {
+		return repositorymodels.Collection{}, repositorymodels.StatusNotFound
+	}
+
+	return storeState.Collections[databaseId][collectionId], repositorymodels.StatusOk
 }
 
-func DeleteCollection(databaseId string, id string) repositorymodels.RepositoryStatus {
+func DeleteCollection(databaseId string, collectionId string) repositorymodels.RepositoryStatus {
-	for index, coll := range collections {
+	if _, ok := storeState.Databases[databaseId]; !ok {
-		if coll.Internals.DatabaseId == databaseId && coll.ID == id {
+		return repositorymodels.StatusNotFound
-			collections = append(collections[:index], collections[index+1:]...)
-			return repositorymodels.StatusOk
-		}
 	}
 
+	if _, ok := storeState.Collections[databaseId][collectionId]; !ok {
 		return repositorymodels.StatusNotFound
+	}
+
+	delete(storeState.Collections[databaseId], collectionId)
+
+	return repositorymodels.StatusOk
 }
 
 func CreateCollection(databaseId string, newCollection repositorymodels.Collection) (repositorymodels.Collection, repositorymodels.RepositoryStatus) {
-	for _, coll := range collections {
+	if _, ok := storeState.Databases[databaseId]; !ok {
-		if coll.Internals.DatabaseId == databaseId && coll.ID == newCollection.ID {
+		return repositorymodels.Collection{}, repositorymodels.StatusNotFound
-			return repositorymodels.Collection{}, repositorymodels.Conflict
 	}
+
+	if _, ok := storeState.Collections[databaseId][newCollection.ID]; ok {
+		return repositorymodels.Collection{}, repositorymodels.Conflict
 	}
 
 	newCollection = structhidrators.Hidrate(newCollection).(repositorymodels.Collection)
@@ -56,9 +58,9 @@ func CreateCollection(databaseId string, newCollection repositorymodels.Collecti
 	newCollection.TimeStamp = time.Now().Unix()
 	newCollection.UniqueID = uuid.New().String()
 	newCollection.ETag = fmt.Sprintf("\"%s\"", newCollection.UniqueID)
-	newCollection.Internals = struct{ DatabaseId string }{
+
-		DatabaseId: databaseId,
+	storeState.Collections[databaseId][newCollection.ID] = newCollection
-	}
+	storeState.Documents[databaseId][newCollection.ID] = make(map[string]repositorymodels.Document)
-	collections = append(collections, newCollection)
+
 	return newCollection, repositorymodels.StatusOk
 }

internal/repositories/databases.go

@@ -6,48 +6,42 @@ import (
 
 	"github.com/google/uuid"
 	repositorymodels "github.com/pikami/cosmium/internal/repository_models"
+	"golang.org/x/exp/maps"
 )
 
-var databases = []repositorymodels.Database{
-	{ID: "db1"},
-	{ID: "db2"},
-}
-
 func GetAllDatabases() ([]repositorymodels.Database, repositorymodels.RepositoryStatus) {
-	return databases, repositorymodels.StatusOk
+	return maps.Values(storeState.Databases), repositorymodels.StatusOk
 }
 
 func GetDatabase(id string) (repositorymodels.Database, repositorymodels.RepositoryStatus) {
-	for _, db := range databases {
+	if database, ok := storeState.Databases[id]; ok {
-		if db.ID == id {
+		return database, repositorymodels.StatusOk
-			return db, repositorymodels.StatusOk
-		}
 	}
 
 	return repositorymodels.Database{}, repositorymodels.StatusNotFound
 }
 
 func DeleteDatabase(id string) repositorymodels.RepositoryStatus {
-	for index, db := range databases {
+	if _, ok := storeState.Databases[id]; !ok {
-		if db.ID == id {
+		return repositorymodels.StatusNotFound
-			databases = append(databases[:index], databases[index+1:]...)
-			return repositorymodels.StatusOk
-		}
 	}
 
-	return repositorymodels.StatusNotFound
+	delete(storeState.Databases, id)
+
+	return repositorymodels.StatusOk
 }
 
-func CreateDatabase(newDatabase repositorymodels.Database) repositorymodels.RepositoryStatus {
+func CreateDatabase(newDatabase repositorymodels.Database) (repositorymodels.Database, repositorymodels.RepositoryStatus) {
-	for _, db := range databases {
+	if _, ok := storeState.Databases[newDatabase.ID]; ok {
-		if db.ID == newDatabase.ID {
+		return repositorymodels.Database{}, repositorymodels.Conflict
-			return repositorymodels.Conflict
-		}
 	}
 
 	newDatabase.TimeStamp = time.Now().Unix()
 	newDatabase.UniqueID = uuid.New().String()
 	newDatabase.ETag = fmt.Sprintf("\"%s\"", newDatabase.UniqueID)
-	databases = append(databases, newDatabase)
+	storeState.Databases[newDatabase.ID] = newDatabase
-	return repositorymodels.StatusOk
+	storeState.Collections[newDatabase.ID] = make(map[string]repositorymodels.Collection)
+	storeState.Documents[newDatabase.ID] = make(map[string]map[string]repositorymodels.Document)
+
+	return newDatabase, repositorymodels.StatusOk
 }

internal/repositories/documents.go

@@ -3,7 +3,6 @@ package repositories
 import (
 	"fmt"
 	"log"
-	"strings"
 	"time"
 
 	"github.com/google/uuid"
@@ -11,102 +10,81 @@ import (
 	"github.com/pikami/cosmium/parsers"
 	"github.com/pikami/cosmium/parsers/nosql"
 	memoryexecutor "github.com/pikami/cosmium/query_executors/memory_executor"
+	"golang.org/x/exp/maps"
 )
 
-var documents = []repositorymodels.Document{}
-
 func GetAllDocuments(databaseId string, collectionId string) ([]repositorymodels.Document, repositorymodels.RepositoryStatus) {
-	filteredDocuments := make([]repositorymodels.Document, 0)
+	if _, ok := storeState.Databases[databaseId]; !ok {
-
+		return make([]repositorymodels.Document, 0), repositorymodels.StatusNotFound
-	for _, doc := range documents {
-		docDbId := doc["_internal"].(map[string]interface{})["databaseId"]
-		docCollId := doc["_internal"].(map[string]interface{})["collectionId"]
-
-		if docDbId == databaseId && docCollId == collectionId {
-			doc["_partitionKeyValue"] = doc["_internal"].(map[string]interface{})["partitionKeyValue"]
-			filteredDocuments = append(filteredDocuments, doc)
-		}
 	}
 
-	return filteredDocuments, repositorymodels.StatusOk
+	if _, ok := storeState.Collections[databaseId][collectionId]; !ok {
+		return make([]repositorymodels.Document, 0), repositorymodels.StatusNotFound
+	}
+
+	return maps.Values(storeState.Documents[databaseId][collectionId]), repositorymodels.StatusOk
 }
 
 func GetDocument(databaseId string, collectionId string, documentId string) (repositorymodels.Document, repositorymodels.RepositoryStatus) {
-	for _, doc := range documents {
+	if _, ok := storeState.Databases[databaseId]; !ok {
-		docDbId := doc["_internal"].(map[string]interface{})["databaseId"]
-		docCollId := doc["_internal"].(map[string]interface{})["collectionId"]
-		docId := doc["id"]
-
-		if docDbId == databaseId && docCollId == collectionId && docId == documentId {
-			doc["_partitionKeyValue"] = doc["_internal"].(map[string]interface{})["partitionKeyValue"]
-			return doc, repositorymodels.StatusOk
-		}
-	}
-
 		return repositorymodels.Document{}, repositorymodels.StatusNotFound
+	}
+
+	if _, ok := storeState.Collections[databaseId][collectionId]; !ok {
+		return repositorymodels.Document{}, repositorymodels.StatusNotFound
+	}
+
+	if _, ok := storeState.Documents[databaseId][collectionId][documentId]; !ok {
+		return repositorymodels.Document{}, repositorymodels.StatusNotFound
+	}
+
+	return storeState.Documents[databaseId][collectionId][documentId], repositorymodels.StatusOk
 }
 
 func DeleteDocument(databaseId string, collectionId string, documentId string) repositorymodels.RepositoryStatus {
-	for index, doc := range documents {
+	if _, ok := storeState.Databases[databaseId]; !ok {
-		docDbId := doc["_internal"].(map[string]interface{})["databaseId"]
-		docCollId := doc["_internal"].(map[string]interface{})["collectionId"]
-		docId := doc["id"]
-
-		if docDbId == databaseId && docCollId == collectionId && docId == documentId {
-			documents = append(documents[:index], documents[index+1:]...)
-			return repositorymodels.StatusOk
-		}
-	}
-
 		return repositorymodels.StatusNotFound
+	}
+
+	if _, ok := storeState.Collections[databaseId][collectionId]; !ok {
+		return repositorymodels.StatusNotFound
+	}
+
+	if _, ok := storeState.Documents[databaseId][collectionId][documentId]; !ok {
+		return repositorymodels.StatusNotFound
+	}
+
+	delete(storeState.Documents[databaseId][collectionId], documentId)
+
+	return repositorymodels.StatusOk
 }
 
-func CreateDocument(databaseId string, collectionId string, document map[string]interface{}) repositorymodels.RepositoryStatus {
+func CreateDocument(databaseId string, collectionId string, document map[string]interface{}) (repositorymodels.Document, repositorymodels.RepositoryStatus) {
-	if document["id"] == "" {
+	var documentId string
-		return repositorymodels.BadRequest
+	var ok bool
+	if documentId, ok = document["id"].(string); !ok || documentId == "" {
+		return repositorymodels.Document{}, repositorymodels.BadRequest
 	}
 
-	collection, status := GetCollection(databaseId, collectionId)
+	if _, ok := storeState.Databases[databaseId]; !ok {
-	if status != repositorymodels.StatusOk {
+		return repositorymodels.Document{}, repositorymodels.StatusNotFound
-		return repositorymodels.StatusNotFound
 	}
 
-	for _, doc := range documents {
+	if _, ok = storeState.Collections[databaseId][collectionId]; !ok {
-		docDbId := doc["_internal"].(map[string]interface{})["databaseId"]
+		return repositorymodels.Document{}, repositorymodels.StatusNotFound
-		docCollId := doc["_internal"].(map[string]interface{})["collectionId"]
-		docId := doc["id"]
-
-		if docDbId == databaseId && docCollId == collectionId && docId == document["id"] {
-			return repositorymodels.Conflict
-		}
 	}
 
-	partitionKeyValue := make([]string, 0)
+	if _, ok := storeState.Documents[databaseId][collectionId][documentId]; ok {
-	for _, path := range collection.PartitionKey.Paths {
+		return repositorymodels.Document{}, repositorymodels.Conflict
-		var val interface{}
-		for _, part := range strings.Split(path, "/") {
-			val = document[part]
-		}
-
-		if val == nil {
-			val = ""
-		}
-
-		// TODO: handle non-string partition keys
-		partitionKeyValue = append(partitionKeyValue, val.(string))
 	}
 
 	document["_ts"] = time.Now().Unix()
 	document["_rid"] = uuid.New().String()
 	document["_etag"] = fmt.Sprintf("\"%s\"", document["_rid"])
-	document["_internal"] = map[string]interface{}{
-		"databaseId":        databaseId,
-		"collectionId":      collectionId,
-		"partitionKeyValue": partitionKeyValue,
-	}
-	documents = append(documents, document)
 
-	return repositorymodels.StatusOk
+	storeState.Documents[databaseId][collectionId][documentId] = document
+
+	return document, repositorymodels.StatusOk
 }
 
 func ExecuteQueryDocuments(databaseId string, collectionId string, query string, queryParameters map[string]interface{}) ([]memoryexecutor.RowType, repositorymodels.RepositoryStatus) {

internal/repositories/state.go

@@ -5,10 +5,20 @@ import (
 	"fmt"
 	"log"
 	"os"
+	"reflect"
 
 	repositorymodels "github.com/pikami/cosmium/internal/repository_models"
 )
 
+var storedProcedures = []repositorymodels.StoredProcedure{}
+var triggers = []repositorymodels.Trigger{}
+var userDefinedFunctions = []repositorymodels.UserDefinedFunction{}
+var storeState = repositorymodels.State{
+	Databases:   make(map[string]repositorymodels.Database),
+	Collections: make(map[string]map[string]repositorymodels.Collection),
+	Documents:   make(map[string]map[string]map[string]repositorymodels.Document),
+}
+
 func LoadStateFS(filePath string) {
 	data, err := os.ReadFile(filePath)
 	if err != nil {
@@ -21,19 +31,91 @@ func LoadStateFS(filePath string) {
 	}
 
 	fmt.Println("Loaded state:")
-	fmt.Printf("Databases: %d\n", len(state.Databases))
+	fmt.Printf("Databases: %d\n", getLength(state.Databases))
-	fmt.Printf("Collections: %d\n", len(state.Collections))
+	fmt.Printf("Collections: %d\n", getLength(state.Collections))
-	fmt.Printf("Documents: %d\n", len(state.Documents))
+	fmt.Printf("Documents: %d\n", getLength(state.Documents))
 
-	databases = state.Databases
+	storeState = state
-	collections = state.Collections
+
-	documents = state.Documents
+	ensureStoreStateNoNullReferences()
 }
 
-func GetState() map[string]interface{} {
+func SaveStateFS(filePath string) {
-	return map[string]interface{}{
+	data, err := json.MarshalIndent(storeState, "", "\t")
-		"databases":   databases,
+	if err != nil {
-		"collections": collections,
+		fmt.Printf("Failed to save state: %v\n", err)
-		"documents":   documents,
+		return
+	}
+
+	os.WriteFile(filePath, data, os.ModePerm)
+
+	fmt.Println("Saved state:")
+	fmt.Printf("Databases: %d\n", getLength(storeState.Databases))
+	fmt.Printf("Collections: %d\n", getLength(storeState.Collections))
+	fmt.Printf("Documents: %d\n", getLength(storeState.Documents))
+}
+
+func GetState() repositorymodels.State {
+	return storeState
+}
+
+func getLength(v interface{}) int {
+	switch v.(type) {
+	case repositorymodels.Database,
+		repositorymodels.Collection,
+		repositorymodels.Document:
+		return 1
+	}
+
+	rv := reflect.ValueOf(v)
+	if rv.Kind() != reflect.Map {
+		return -1
+	}
+
+	count := 0
+	for _, key := range rv.MapKeys() {
+		if rv.MapIndex(key).Kind() == reflect.Map {
+			count += getLength(rv.MapIndex(key).Interface())
+		} else {
+			count++
+		}
+	}
+
+	return count
+}
+
+func ensureStoreStateNoNullReferences() {
+	if storeState.Databases == nil {
+		storeState.Databases = make(map[string]repositorymodels.Database)
+	}
+
+	if storeState.Collections == nil {
+		storeState.Collections = make(map[string]map[string]repositorymodels.Collection)
+	}
+
+	if storeState.Documents == nil {
+		storeState.Documents = make(map[string]map[string]map[string]repositorymodels.Document)
+	}
+
+	for database := range storeState.Databases {
+		if storeState.Collections[database] == nil {
+			storeState.Collections[database] = make(map[string]repositorymodels.Collection)
+		}
+
+		if storeState.Documents[database] == nil {
+			storeState.Documents[database] = make(map[string]map[string]repositorymodels.Document)
+		}
+
+		for collection := range storeState.Collections[database] {
+			if storeState.Documents[database][collection] == nil {
+				storeState.Documents[database][collection] = make(map[string]repositorymodels.Document)
+			}
+
+			for document := range storeState.Documents[database][collection] {
+				if storeState.Documents[database][collection][document] == nil {
+					delete(storeState.Documents[database][collection], document)
+				}
+			}
+		}
 	}
 }

internal/repositories/stored_procedures.go

@@ -2,16 +2,6 @@ package repositories
 
 import repositorymodels "github.com/pikami/cosmium/internal/repository_models"
 
-var storedProcedures = []repositorymodels.StoredProcedure{}
-
 func GetAllStoredProcedures(databaseId string, collectionId string) ([]repositorymodels.StoredProcedure, repositorymodels.RepositoryStatus) {
-	sps := make([]repositorymodels.StoredProcedure, 0)
+	return storedProcedures, repositorymodels.StatusOk
-
-	for _, coll := range storedProcedures {
-		if coll.Internals.DatabaseId == databaseId && coll.Internals.CollectionId == collectionId {
-			sps = append(sps, coll)
-		}
-	}
-
-	return sps, repositorymodels.StatusOk
 }

internal/repositories/triggers.go

@@ -2,16 +2,6 @@ package repositories
 
 import repositorymodels "github.com/pikami/cosmium/internal/repository_models"
 
-var triggers = []repositorymodels.Trigger{}
-
 func GetAllTriggers(databaseId string, collectionId string) ([]repositorymodels.Trigger, repositorymodels.RepositoryStatus) {
-	filteredTriggers := make([]repositorymodels.Trigger, 0)
+	return triggers, repositorymodels.StatusOk
-
-	for _, coll := range triggers {
-		if coll.Internals.DatabaseId == databaseId && coll.Internals.CollectionId == collectionId {
-			filteredTriggers = append(filteredTriggers, coll)
-		}
-	}
-
-	return filteredTriggers, repositorymodels.StatusOk
 }

internal/repositories/user_defined_functions.go

@@ -2,16 +2,6 @@ package repositories
 
 import repositorymodels "github.com/pikami/cosmium/internal/repository_models"
 
-var userDefinedFunctions = []repositorymodels.UserDefinedFunction{}
-
 func GetAllUserDefinedFunctions(databaseId string, collectionId string) ([]repositorymodels.UserDefinedFunction, repositorymodels.RepositoryStatus) {
-	udfs := make([]repositorymodels.UserDefinedFunction, 0)
+	return userDefinedFunctions, repositorymodels.StatusOk
-
-	for _, coll := range userDefinedFunctions {
-		if coll.Internals.DatabaseId == databaseId && coll.Internals.CollectionId == collectionId {
-			udfs = append(udfs, coll)
-		}
-	}
-
-	return udfs, repositorymodels.StatusOk
 }

internal/repository_models/models.go

@@ -29,9 +29,6 @@ type Collection struct {
 	Triggers       string                   `json:"_triggers"`
 	Udfs           string                   `json:"_udfs"`
 	Conflicts      string                   `json:"_conflicts"`
-	Internals      struct {
-		DatabaseId string
-	}
 }
 
 type CollectionIndexingPolicy struct {
@@ -63,10 +60,6 @@ type UserDefinedFunction struct {
 	Ts   int    `json:"_ts"`
 	Self string `json:"_self"`
 	Etag string `json:"_etag"`
-	Internals struct {
-		DatabaseId   string
-		CollectionId string
-	}
 }
 
 type StoredProcedure struct {
@@ -76,10 +69,6 @@ type StoredProcedure struct {
 	Ts   int    `json:"_ts"`
 	Self string `json:"_self"`
 	Etag string `json:"_etag"`
-	Internals struct {
-		DatabaseId   string
-		CollectionId string
-	}
 }
 
 type Trigger struct {
@@ -91,10 +80,6 @@ type Trigger struct {
 	Ts               int    `json:"_ts"`
 	Self             string `json:"_self"`
 	Etag             string `json:"_etag"`
-	Internals        struct {
-		DatabaseId   string
-		CollectionId string
-	}
 }
 
 type Document map[string]interface{}
@@ -115,7 +100,12 @@ type PartitionKeyRange struct {
 }
 
 type State struct {
-	Databases   []Database   `json:"databases"`
+	// Map databaseId -> Database
-	Collections []Collection `json:"collections"`
+	Databases map[string]Database `json:"databases"`
-	Documents   []Document   `json:"documents"`
+
+	// Map databaseId -> collectionId -> Collection
+	Collections map[string]map[string]Collection `json:"collections"`
+
+	// Map databaseId -> collectionId -> documentId -> Documents
+	Documents map[string]map[string]map[string]Document `json:"documents"`
 }

main.go

@@ -2,6 +2,9 @@ package main
 
 import (
 	"fmt"
+	"os"
+	"os/signal"
+	"syscall"
 
 	"github.com/pikami/cosmium/api"
 	"github.com/pikami/cosmium/api/config"
@@ -11,13 +14,32 @@ import (
 func main() {
 	config.ParseFlags()
 
-	if config.Config.DataFilePath != "" {
+	if config.Config.InitialDataFilePath != "" {
-		repositories.LoadStateFS(config.Config.DataFilePath)
+		repositories.LoadStateFS(config.Config.InitialDataFilePath)
 	}
 
 	router := api.CreateRouter()
-	router.RunTLS(
+	if config.Config.TLS_CertificatePath == "" ||
+		config.Config.TLS_CertificateKey == "" {
+		go router.Run(fmt.Sprintf(":%d", config.Config.Port))
+	} else {
+		go router.RunTLS(
 			fmt.Sprintf(":%d", config.Config.Port),
 			config.Config.TLS_CertificatePath,
 			config.Config.TLS_CertificateKey)
+	}
+
+	waitForExit()
+}
+
+func waitForExit() {
+	sigs := make(chan os.Signal, 1)
+	signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)
+
+	// Block until a exit signal is received
+	<-sigs
+
+	if config.Config.PersistDataFilePath != "" {
+		repositories.SaveStateFS(config.Config.PersistDataFilePath)
+	}
 }

parsers/nosql/nosql.peg

@@ -9,14 +9,9 @@ func makeSelectStmt(columns, table, whereClause interface{}, count interface{},
 		Table:       table.(parsers.Table),
 	}
 
-	if filters, ok := whereClause.(parsers.ComparisonExpression); ok {
+    switch v := whereClause.(type) {
-		selectStmt.Filters = filters
+        case parsers.ComparisonExpression, parsers.LogicalExpression, parsers.Constant, parsers.SelectItem:
-	} else if filters, ok := whereClause.(parsers.LogicalExpression); ok {
+            selectStmt.Filters = v
-		selectStmt.Filters = filters
-	} else if filters, ok := whereClause.(parsers.Constant); ok {
-		selectStmt.Filters = filters
-	} else if filters, ok := whereClause.(parsers.SelectItem); ok {
-		selectStmt.Filters = filters
     }
 
 	if n, ok := count.(int); ok {
@@ -284,14 +279,12 @@ ComparisonOperator <- ("=" / "!=" / "<" / "<=" / ">" / ">=") {
     return string(c.text), nil
 }
 
-StringEquals <- "STRINGEQUALS"i
-
 Literal <- FloatLiteral / IntegerLiteral / StringLiteral / BooleanLiteral / ParameterConstant / NullConstant
 
 ParameterConstant <- "@" Identifier {
     return parsers.Constant{Type: parsers.ConstantTypeParameterConstant, Value: string(c.text)}, nil
 }
-NullConstant <- "null" {
+NullConstant <- "null"i {
     return parsers.Constant{Value: nil}, nil
 }
 
@@ -357,7 +350,7 @@ LowerExpression <- "LOWER"i ws "(" ex:SelectItem ")" {
     return createFunctionCall(parsers.FunctionCallLower, []interface{}{ex})
 }
 
-StringEqualsExpression <- StringEquals ws "(" ws ex1:SelectItem ws "," ws ex2:SelectItem ws ignoreCase:("," ws boolean:SelectItem { return boolean, nil })? ")" {
+StringEqualsExpression <- "STRINGEQUALS"i ws "(" ws ex1:SelectItem ws "," ws ex2:SelectItem ws ignoreCase:("," ws boolean:SelectItem { return boolean, nil })? ")" {
     return createFunctionCall(parsers.FunctionCallStringEquals, []interface{}{ex1, ex2, ignoreCase})
 }
 
@@ -425,7 +418,7 @@ ThreeArgumentStringFunctionExpression <- function:ThreeArgumentStringFunction ws
         functionType = parsers.FunctionCallIndexOf
     }
 
-    return parsers.FunctionCall{Type: functionType, Arguments: []interface{}{ex1, ex2, ignoreCase}}, nil
+    return createFunctionCall(functionType, []interface{}{ex1, ex2, ignoreCase})
 }
 
 ThreeArgumentStringFunction <- ("CONTAINS"i / "ENDSWITH"i / "STARTSWITH"i / "INDEX_OF"i) {
@@ -493,8 +486,7 @@ SetUnionExpression <- "SetUnion"i ws "(" ws set1:SelectItem ws "," ws set2:Selec
 }
 
 InFunction <- ex1:SelectProperty ws "IN"i ws "(" ws ex2:SelectItem others:(ws "," ws ex:SelectItem { return ex, nil })* ws ")" {
-    arguments := append([]interface{}{ex1, ex2}, others.([]interface{})...)
+    return createFunctionCall(parsers.FunctionCallIn, append([]interface{}{ex1, ex2}, others.([]interface{})...))
-    return parsers.FunctionCall{Type: parsers.FunctionCallIn, Arguments: arguments}, nil
 }
 
 Integer <- [0-9]+ {

query_executors/memory_executor/array_functions.go

@@ -7,17 +7,17 @@ import (
 	"github.com/pikami/cosmium/parsers"
 )
 
-func array_Concat(arguments []interface{}, queryParameters map[string]interface{}, row RowType) []interface{} {
+func (c memoryExecutorContext) array_Concat(arguments []interface{}, row RowType) []interface{} {
 	var result []interface{}
 	for _, arg := range arguments {
-		array := parseArray(arg, queryParameters, row)
+		array := c.parseArray(arg, row)
 		result = append(result, array...)
 	}
 	return result
 }
 
-func array_Length(arguments []interface{}, queryParameters map[string]interface{}, row RowType) int {
+func (c memoryExecutorContext) array_Length(arguments []interface{}, row RowType) int {
-	array := parseArray(arguments[0], queryParameters, row)
+	array := c.parseArray(arguments[0], row)
 	if array == nil {
 		return 0
 	}
@@ -25,15 +25,15 @@ func array_Length(arguments []interface{}, queryParameters map[string]interface{
 	return len(array)
 }
 
-func array_Slice(arguments []interface{}, queryParameters map[string]interface{}, row RowType) []interface{} {
+func (c memoryExecutorContext) array_Slice(arguments []interface{}, row RowType) []interface{} {
 	var ok bool
 	var start int
 	var length int
-	array := parseArray(arguments[0], queryParameters, row)
+	array := c.parseArray(arguments[0], row)
-	startEx := getFieldValue(arguments[1].(parsers.SelectItem), queryParameters, row)
+	startEx := c.getFieldValue(arguments[1].(parsers.SelectItem), row)
 
 	if arguments[2] != nil {
-		lengthEx := getFieldValue(arguments[2].(parsers.SelectItem), queryParameters, row)
+		lengthEx := c.getFieldValue(arguments[2].(parsers.SelectItem), row)
 
 		if length, ok = lengthEx.(int); !ok {
 			fmt.Println("array_Slice - got length parameters of wrong type")
@@ -65,9 +65,9 @@ func array_Slice(arguments []interface{}, queryParameters map[string]interface{}
 	return array[start:end]
 }
 
-func set_Intersect(arguments []interface{}, queryParameters map[string]interface{}, row RowType) []interface{} {
+func (c memoryExecutorContext) set_Intersect(arguments []interface{}, row RowType) []interface{} {
-	set1 := parseArray(arguments[0], queryParameters, row)
+	set1 := c.parseArray(arguments[0], row)
-	set2 := parseArray(arguments[1], queryParameters, row)
+	set2 := c.parseArray(arguments[1], row)
 
 	intersection := make(map[interface{}]struct{})
 	if set1 == nil || set2 == nil {
@@ -88,9 +88,9 @@ func set_Intersect(arguments []interface{}, queryParameters map[string]interface
 	return result
 }
 
-func set_Union(arguments []interface{}, queryParameters map[string]interface{}, row RowType) []interface{} {
+func (c memoryExecutorContext) set_Union(arguments []interface{}, row RowType) []interface{} {
-	set1 := parseArray(arguments[0], queryParameters, row)
+	set1 := c.parseArray(arguments[0], row)
-	set2 := parseArray(arguments[1], queryParameters, row)
+	set2 := c.parseArray(arguments[1], row)
 
 	var result []interface{}
 	union := make(map[interface{}]struct{})
@@ -111,9 +111,9 @@ func set_Union(arguments []interface{}, queryParameters map[string]interface{},
 	return result
 }
 
-func parseArray(argument interface{}, queryParameters map[string]interface{}, row RowType) []interface{} {
+func (c memoryExecutorContext) parseArray(argument interface{}, row RowType) []interface{} {
 	exItem := argument.(parsers.SelectItem)
-	ex := getFieldValue(exItem, queryParameters, row)
+	ex := c.getFieldValue(exItem, row)
 
 	arrValue := reflect.ValueOf(ex)
 	if arrValue.Kind() != reflect.Slice {

query_executors/memory_executor/memory_executor.go

@@ -12,19 +12,27 @@ import (
 type RowType interface{}
 type ExpressionType interface{}
 
+type memoryExecutorContext struct {
+	parameters map[string]interface{}
+}
+
 func Execute(query parsers.SelectStmt, data []RowType) []RowType {
+	ctx := memoryExecutorContext{
+		parameters: query.Parameters,
+	}
+
 	result := make([]RowType, 0)
 
 	// Apply Filter
 	for _, row := range data {
-		if evaluateFilters(query.Filters, query.Parameters, row) {
+		if ctx.evaluateFilters(query.Filters, row) {
 			result = append(result, row)
 		}
 	}
 
 	// Apply order
 	if query.OrderExpressions != nil && len(query.OrderExpressions) > 0 {
-		orderBy(query.OrderExpressions, query.Parameters, result)
+		ctx.orderBy(query.OrderExpressions, result)
 	}
 
 	// Apply result limit
@@ -41,16 +49,16 @@ func Execute(query parsers.SelectStmt, data []RowType) []RowType {
 	// Apply select
 	selectedData := make([]RowType, 0)
 	for _, row := range result {
-		selectedData = append(selectedData, selectRow(query.SelectItems, query.Parameters, row))
+		selectedData = append(selectedData, ctx.selectRow(query.SelectItems, row))
 	}
 
 	return selectedData
 }
 
-func selectRow(selectItems []parsers.SelectItem, queryParameters map[string]interface{}, row RowType) interface{} {
+func (c memoryExecutorContext) selectRow(selectItems []parsers.SelectItem, row RowType) interface{} {
 	// When the first value is top level, select it instead
 	if len(selectItems) > 0 && selectItems[0].IsTopLevel {
-		return getFieldValue(selectItems[0], queryParameters, row)
+		return c.getFieldValue(selectItems[0], row)
 	}
 
 	// Construct a new row based on the selected columns
@@ -65,21 +73,21 @@ func selectRow(selectItems []parsers.SelectItem, queryParameters map[string]inte
 			}
 		}
 
-		newRow[destinationName] = getFieldValue(column, queryParameters, row)
+		newRow[destinationName] = c.getFieldValue(column, row)
 	}
 
 	return newRow
 }
 
-func evaluateFilters(expr ExpressionType, queryParameters map[string]interface{}, row RowType) bool {
+func (c memoryExecutorContext) evaluateFilters(expr ExpressionType, row RowType) bool {
 	if expr == nil {
 		return true
 	}
 
 	switch typedValue := expr.(type) {
 	case parsers.ComparisonExpression:
-		leftValue := getExpressionParameterValue(typedValue.Left, queryParameters, row)
+		leftValue := c.getExpressionParameterValue(typedValue.Left, row)
-		rightValue := getExpressionParameterValue(typedValue.Right, queryParameters, row)
+		rightValue := c.getExpressionParameterValue(typedValue.Right, row)
 
 		cmp := compareValues(leftValue, rightValue)
 		switch typedValue.Operation {
@@ -99,7 +107,7 @@ func evaluateFilters(expr ExpressionType, queryParameters map[string]interface{}
 	case parsers.LogicalExpression:
 		var result bool
 		for i, expression := range typedValue.Expressions {
-			expressionResult := evaluateFilters(expression, queryParameters, row)
+			expressionResult := c.evaluateFilters(expression, row)
 			if i == 0 {
 				result = expressionResult
 			}
@@ -124,7 +132,7 @@ func evaluateFilters(expr ExpressionType, queryParameters map[string]interface{}
 		}
 		return false
 	case parsers.SelectItem:
-		resolvedValue := getFieldValue(typedValue, queryParameters, row)
+		resolvedValue := c.getFieldValue(typedValue, row)
 		if value, ok := resolvedValue.(bool); ok {
 			return value
 		}
@@ -132,11 +140,11 @@ func evaluateFilters(expr ExpressionType, queryParameters map[string]interface{}
 	return false
 }
 
-func getFieldValue(field parsers.SelectItem, queryParameters map[string]interface{}, row RowType) interface{} {
+func (c memoryExecutorContext) getFieldValue(field parsers.SelectItem, row RowType) interface{} {
 	if field.Type == parsers.SelectItemTypeArray {
 		arrayValue := make([]interface{}, 0)
 		for _, selectItem := range field.SelectItems {
-			arrayValue = append(arrayValue, getFieldValue(selectItem, queryParameters, row))
+			arrayValue = append(arrayValue, c.getFieldValue(selectItem, row))
 		}
 		return arrayValue
 	}
@@ -144,7 +152,7 @@ func getFieldValue(field parsers.SelectItem, queryParameters map[string]interfac
 	if field.Type == parsers.SelectItemTypeObject {
 		objectValue := make(map[string]interface{})
 		for _, selectItem := range field.SelectItems {
-			objectValue[selectItem.Alias] = getFieldValue(selectItem, queryParameters, row)
+			objectValue[selectItem.Alias] = c.getFieldValue(selectItem, row)
 		}
 		return objectValue
 	}
@@ -158,9 +166,9 @@ func getFieldValue(field parsers.SelectItem, queryParameters map[string]interfac
 		}
 
 		if typedValue.Type == parsers.ConstantTypeParameterConstant &&
-			queryParameters != nil {
+			c.parameters != nil {
 			if key, ok := typedValue.Value.(string); ok {
-				return queryParameters[key]
+				return c.parameters[key]
 			}
 		}
 
@@ -177,78 +185,78 @@ func getFieldValue(field parsers.SelectItem, queryParameters map[string]interfac
 
 		switch typedValue.Type {
 		case parsers.FunctionCallStringEquals:
-			return strings_StringEquals(typedValue.Arguments, queryParameters, row)
+			return c.strings_StringEquals(typedValue.Arguments, row)
 		case parsers.FunctionCallContains:
-			return strings_Contains(typedValue.Arguments, queryParameters, row)
+			return c.strings_Contains(typedValue.Arguments, row)
 		case parsers.FunctionCallEndsWith:
-			return strings_EndsWith(typedValue.Arguments, queryParameters, row)
+			return c.strings_EndsWith(typedValue.Arguments, row)
 		case parsers.FunctionCallStartsWith:
-			return strings_StartsWith(typedValue.Arguments, queryParameters, row)
+			return c.strings_StartsWith(typedValue.Arguments, row)
 		case parsers.FunctionCallConcat:
-			return strings_Concat(typedValue.Arguments, queryParameters, row)
+			return c.strings_Concat(typedValue.Arguments, row)
 		case parsers.FunctionCallIndexOf:
-			return strings_IndexOf(typedValue.Arguments, queryParameters, row)
+			return c.strings_IndexOf(typedValue.Arguments, row)
 		case parsers.FunctionCallToString:
-			return strings_ToString(typedValue.Arguments, queryParameters, row)
+			return c.strings_ToString(typedValue.Arguments, row)
 		case parsers.FunctionCallUpper:
-			return strings_Upper(typedValue.Arguments, queryParameters, row)
+			return c.strings_Upper(typedValue.Arguments, row)
 		case parsers.FunctionCallLower:
-			return strings_Lower(typedValue.Arguments, queryParameters, row)
+			return c.strings_Lower(typedValue.Arguments, row)
 		case parsers.FunctionCallLeft:
-			return strings_Left(typedValue.Arguments, queryParameters, row)
+			return c.strings_Left(typedValue.Arguments, row)
 		case parsers.FunctionCallLength:
-			return strings_Length(typedValue.Arguments, queryParameters, row)
+			return c.strings_Length(typedValue.Arguments, row)
 		case parsers.FunctionCallLTrim:
-			return strings_LTrim(typedValue.Arguments, queryParameters, row)
+			return c.strings_LTrim(typedValue.Arguments, row)
 		case parsers.FunctionCallReplace:
-			return strings_Replace(typedValue.Arguments, queryParameters, row)
+			return c.strings_Replace(typedValue.Arguments, row)
 		case parsers.FunctionCallReplicate:
-			return strings_Replicate(typedValue.Arguments, queryParameters, row)
+			return c.strings_Replicate(typedValue.Arguments, row)
 		case parsers.FunctionCallReverse:
-			return strings_Reverse(typedValue.Arguments, queryParameters, row)
+			return c.strings_Reverse(typedValue.Arguments, row)
 		case parsers.FunctionCallRight:
-			return strings_Right(typedValue.Arguments, queryParameters, row)
+			return c.strings_Right(typedValue.Arguments, row)
 		case parsers.FunctionCallRTrim:
-			return strings_RTrim(typedValue.Arguments, queryParameters, row)
+			return c.strings_RTrim(typedValue.Arguments, row)
 		case parsers.FunctionCallSubstring:
-			return strings_Substring(typedValue.Arguments, queryParameters, row)
+			return c.strings_Substring(typedValue.Arguments, row)
 		case parsers.FunctionCallTrim:
-			return strings_Trim(typedValue.Arguments, queryParameters, row)
+			return c.strings_Trim(typedValue.Arguments, row)
 
 		case parsers.FunctionCallIsDefined:
-			return typeChecking_IsDefined(typedValue.Arguments, queryParameters, row)
+			return c.typeChecking_IsDefined(typedValue.Arguments, row)
 		case parsers.FunctionCallIsArray:
-			return typeChecking_IsArray(typedValue.Arguments, queryParameters, row)
+			return c.typeChecking_IsArray(typedValue.Arguments, row)
 		case parsers.FunctionCallIsBool:
-			return typeChecking_IsBool(typedValue.Arguments, queryParameters, row)
+			return c.typeChecking_IsBool(typedValue.Arguments, row)
 		case parsers.FunctionCallIsFiniteNumber:
-			return typeChecking_IsFiniteNumber(typedValue.Arguments, queryParameters, row)
+			return c.typeChecking_IsFiniteNumber(typedValue.Arguments, row)
 		case parsers.FunctionCallIsInteger:
-			return typeChecking_IsInteger(typedValue.Arguments, queryParameters, row)
+			return c.typeChecking_IsInteger(typedValue.Arguments, row)
 		case parsers.FunctionCallIsNull:
-			return typeChecking_IsNull(typedValue.Arguments, queryParameters, row)
+			return c.typeChecking_IsNull(typedValue.Arguments, row)
 		case parsers.FunctionCallIsNumber:
-			return typeChecking_IsNumber(typedValue.Arguments, queryParameters, row)
+			return c.typeChecking_IsNumber(typedValue.Arguments, row)
 		case parsers.FunctionCallIsObject:
-			return typeChecking_IsObject(typedValue.Arguments, queryParameters, row)
+			return c.typeChecking_IsObject(typedValue.Arguments, row)
 		case parsers.FunctionCallIsPrimitive:
-			return typeChecking_IsPrimitive(typedValue.Arguments, queryParameters, row)
+			return c.typeChecking_IsPrimitive(typedValue.Arguments, row)
 		case parsers.FunctionCallIsString:
-			return typeChecking_IsString(typedValue.Arguments, queryParameters, row)
+			return c.typeChecking_IsString(typedValue.Arguments, row)
 
 		case parsers.FunctionCallArrayConcat:
-			return array_Concat(typedValue.Arguments, queryParameters, row)
+			return c.array_Concat(typedValue.Arguments, row)
 		case parsers.FunctionCallArrayLength:
-			return array_Length(typedValue.Arguments, queryParameters, row)
+			return c.array_Length(typedValue.Arguments, row)
 		case parsers.FunctionCallArraySlice:
-			return array_Slice(typedValue.Arguments, queryParameters, row)
+			return c.array_Slice(typedValue.Arguments, row)
 		case parsers.FunctionCallSetIntersect:
-			return set_Intersect(typedValue.Arguments, queryParameters, row)
+			return c.set_Intersect(typedValue.Arguments, row)
 		case parsers.FunctionCallSetUnion:
-			return set_Union(typedValue.Arguments, queryParameters, row)
+			return c.set_Union(typedValue.Arguments, row)
 
 		case parsers.FunctionCallIn:
-			return misc_In(typedValue.Arguments, queryParameters, row)
+			return c.misc_In(typedValue.Arguments, row)
 		}
 	}
 
@@ -265,14 +273,13 @@ func getFieldValue(field parsers.SelectItem, queryParameters map[string]interfac
 	return value
 }
 
-func getExpressionParameterValue(
+func (c memoryExecutorContext) getExpressionParameterValue(
 	parameter interface{},
-	queryParameters map[string]interface{},
 	row RowType,
 ) interface{} {
 	switch typedParameter := parameter.(type) {
 	case parsers.SelectItem:
-		return getFieldValue(typedParameter, queryParameters, row)
+		return c.getFieldValue(typedParameter, row)
 	}
 
 	fmt.Println("getExpressionParameterValue - got incorrect parameter type")
@@ -280,11 +287,11 @@ func getExpressionParameterValue(
 	return nil
 }
 
-func orderBy(orderBy []parsers.OrderExpression, queryParameters map[string]interface{}, data []RowType) {
+func (c memoryExecutorContext) orderBy(orderBy []parsers.OrderExpression, data []RowType) {
 	less := func(i, j int) bool {
 		for _, order := range orderBy {
-			val1 := getFieldValue(order.SelectItem, queryParameters, data[i])
+			val1 := c.getFieldValue(order.SelectItem, data[i])
-			val2 := getFieldValue(order.SelectItem, queryParameters, data[j])
+			val2 := c.getFieldValue(order.SelectItem, data[j])
 
 			cmp := compareValues(val1, val2)
 			if cmp != 0 {

query_executors/memory_executor/memory_executor_type_checking_functions.go

@@ -1,96 +0,0 @@
-package memoryexecutor
-
-import (
-	"math"
-
-	"github.com/pikami/cosmium/parsers"
-)
-
-func typeChecking_IsDefined(arguments []interface{}, queryParameters map[string]interface{}, row RowType) bool {
-	exItem := arguments[0].(parsers.SelectItem)
-	ex := getFieldValue(exItem, queryParameters, row)
-
-	return ex != nil
-}
-
-func typeChecking_IsArray(arguments []interface{}, queryParameters map[string]interface{}, row RowType) bool {
-	exItem := arguments[0].(parsers.SelectItem)
-	ex := getFieldValue(exItem, queryParameters, row)
-
-	_, isArray := ex.([]interface{})
-	return isArray
-}
-
-func typeChecking_IsBool(arguments []interface{}, queryParameters map[string]interface{}, row RowType) bool {
-	exItem := arguments[0].(parsers.SelectItem)
-	ex := getFieldValue(exItem, queryParameters, row)
-
-	_, isBool := ex.(bool)
-	return isBool
-}
-
-func typeChecking_IsFiniteNumber(arguments []interface{}, queryParameters map[string]interface{}, row RowType) bool {
-	exItem := arguments[0].(parsers.SelectItem)
-	ex := getFieldValue(exItem, queryParameters, row)
-
-	switch num := ex.(type) {
-	case int:
-		return true
-	case float64:
-		return !math.IsInf(num, 0) && !math.IsNaN(num)
-	default:
-		return false
-	}
-}
-
-func typeChecking_IsInteger(arguments []interface{}, queryParameters map[string]interface{}, row RowType) bool {
-	exItem := arguments[0].(parsers.SelectItem)
-	ex := getFieldValue(exItem, queryParameters, row)
-
-	_, isInt := ex.(int)
-	return isInt
-}
-
-func typeChecking_IsNull(arguments []interface{}, queryParameters map[string]interface{}, row RowType) bool {
-	exItem := arguments[0].(parsers.SelectItem)
-	ex := getFieldValue(exItem, queryParameters, row)
-
-	return ex == nil
-}
-
-func typeChecking_IsNumber(arguments []interface{}, queryParameters map[string]interface{}, row RowType) bool {
-	exItem := arguments[0].(parsers.SelectItem)
-	ex := getFieldValue(exItem, queryParameters, row)
-
-	_, isFloat := ex.(float64)
-	_, isInt := ex.(int)
-	return isFloat || isInt
-}
-
-func typeChecking_IsObject(arguments []interface{}, queryParameters map[string]interface{}, row RowType) bool {
-	exItem := arguments[0].(parsers.SelectItem)
-	ex := getFieldValue(exItem, queryParameters, row)
-
-	_, isObject := ex.(map[string]interface{})
-	return isObject
-}
-
-func typeChecking_IsPrimitive(arguments []interface{}, queryParameters map[string]interface{}, row RowType) bool {
-	exItem := arguments[0].(parsers.SelectItem)
-	ex := getFieldValue(exItem, queryParameters, row)
-
-	switch ex.(type) {
-	case bool, string, float64, int, nil:
-		return true
-	default:
-		return false
-	}
-}
-
-func typeChecking_IsString(arguments []interface{}, queryParameters map[string]interface{}, row RowType) bool {
-	exItem := arguments[0].(parsers.SelectItem)
-	ex := getFieldValue(exItem, queryParameters, row)
-
-	_, isStr := ex.(string)
-	return isStr
-}

query_executors/memory_executor/misc_functions.go

@@ -4,11 +4,11 @@ import (
 	"github.com/pikami/cosmium/parsers"
 )
 
-func misc_In(arguments []interface{}, queryParameters map[string]interface{}, row RowType) bool {
+func (c memoryExecutorContext) misc_In(arguments []interface{}, row RowType) bool {
-	value := getFieldValue(arguments[0].(parsers.SelectItem), queryParameters, row)
+	value := c.getFieldValue(arguments[0].(parsers.SelectItem), row)
 
 	for i := 1; i < len(arguments); i++ {
-		compareValue := getFieldValue(arguments[i].(parsers.SelectItem), queryParameters, row)
+		compareValue := c.getFieldValue(arguments[i].(parsers.SelectItem), row)
 		if compareValues(value, compareValue) == 0 {
 			return true
 		}

query_executors/memory_executor/string_functions.go

@@ -7,10 +7,10 @@ import (
 	"github.com/pikami/cosmium/parsers"
 )
 
-func strings_StringEquals(arguments []interface{}, queryParameters map[string]interface{}, row RowType) bool {
+func (c memoryExecutorContext) strings_StringEquals(arguments []interface{}, row RowType) bool {
-	str1 := parseString(arguments[0], queryParameters, row)
+	str1 := c.parseString(arguments[0], row)
-	str2 := parseString(arguments[1], queryParameters, row)
+	str2 := c.parseString(arguments[1], row)
-	ignoreCase := getBoolFlag(arguments, queryParameters, row)
+	ignoreCase := c.getBoolFlag(arguments, row)
 
 	if ignoreCase {
 		return strings.EqualFold(str1, str2)
@@ -19,10 +19,10 @@ func strings_StringEquals(arguments []interface{}, queryParameters map[string]in
 	return str1 == str2
 }
 
-func strings_Contains(arguments []interface{}, queryParameters map[string]interface{}, row RowType) bool {
+func (c memoryExecutorContext) strings_Contains(arguments []interface{}, row RowType) bool {
-	str1 := parseString(arguments[0], queryParameters, row)
+	str1 := c.parseString(arguments[0], row)
-	str2 := parseString(arguments[1], queryParameters, row)
+	str2 := c.parseString(arguments[1], row)
-	ignoreCase := getBoolFlag(arguments, queryParameters, row)
+	ignoreCase := c.getBoolFlag(arguments, row)
 
 	if ignoreCase {
 		str1 = strings.ToLower(str1)
@@ -32,10 +32,10 @@ func strings_Contains(arguments []interface{}, queryParameters map[string]interf
 	return strings.Contains(str1, str2)
 }
 
-func strings_EndsWith(arguments []interface{}, queryParameters map[string]interface{}, row RowType) bool {
+func (c memoryExecutorContext) strings_EndsWith(arguments []interface{}, row RowType) bool {
-	str1 := parseString(arguments[0], queryParameters, row)
+	str1 := c.parseString(arguments[0], row)
-	str2 := parseString(arguments[1], queryParameters, row)
+	str2 := c.parseString(arguments[1], row)
-	ignoreCase := getBoolFlag(arguments, queryParameters, row)
+	ignoreCase := c.getBoolFlag(arguments, row)
 
 	if ignoreCase {
 		str1 = strings.ToLower(str1)
@@ -45,10 +45,10 @@ func strings_EndsWith(arguments []interface{}, queryParameters map[string]interf
 	return strings.HasSuffix(str1, str2)
 }
 
-func strings_StartsWith(arguments []interface{}, queryParameters map[string]interface{}, row RowType) bool {
+func (c memoryExecutorContext) strings_StartsWith(arguments []interface{}, row RowType) bool {
-	str1 := parseString(arguments[0], queryParameters, row)
+	str1 := c.parseString(arguments[0], row)
-	str2 := parseString(arguments[1], queryParameters, row)
+	str2 := c.parseString(arguments[1], row)
-	ignoreCase := getBoolFlag(arguments, queryParameters, row)
+	ignoreCase := c.getBoolFlag(arguments, row)
 
 	if ignoreCase {
 		str1 = strings.ToLower(str1)
@@ -58,12 +58,12 @@ func strings_StartsWith(arguments []interface{}, queryParameters map[string]inte
 	return strings.HasPrefix(str1, str2)
 }
 
-func strings_Concat(arguments []interface{}, queryParameters map[string]interface{}, row RowType) string {
+func (c memoryExecutorContext) strings_Concat(arguments []interface{}, row RowType) string {
 	result := ""
 
 	for _, arg := range arguments {
 		if selectItem, ok := arg.(parsers.SelectItem); ok {
-			value := getFieldValue(selectItem, queryParameters, row)
+			value := c.getFieldValue(selectItem, row)
 			result += convertToString(value)
 		}
 	}
@@ -71,13 +71,13 @@ func strings_Concat(arguments []interface{}, queryParameters map[string]interfac
 	return result
 }
 
-func strings_IndexOf(arguments []interface{}, queryParameters map[string]interface{}, row RowType) int {
+func (c memoryExecutorContext) strings_IndexOf(arguments []interface{}, row RowType) int {
-	str1 := parseString(arguments[0], queryParameters, row)
+	str1 := c.parseString(arguments[0], row)
-	str2 := parseString(arguments[1], queryParameters, row)
+	str2 := c.parseString(arguments[1], row)
 
 	start := 0
 	if len(arguments) > 2 && arguments[2] != nil {
-		if startPos, ok := getFieldValue(arguments[2].(parsers.SelectItem), queryParameters, row).(int); ok {
+		if startPos, ok := c.getFieldValue(arguments[2].(parsers.SelectItem), row).(int); ok {
 			start = startPos
 		}
 	}
@@ -96,26 +96,26 @@ func strings_IndexOf(arguments []interface{}, queryParameters map[string]interfa
 	}
 }
 
-func strings_ToString(arguments []interface{}, queryParameters map[string]interface{}, row RowType) string {
+func (c memoryExecutorContext) strings_ToString(arguments []interface{}, row RowType) string {
-	value := getFieldValue(arguments[0].(parsers.SelectItem), queryParameters, row)
+	value := c.getFieldValue(arguments[0].(parsers.SelectItem), row)
 	return convertToString(value)
 }
 
-func strings_Upper(arguments []interface{}, queryParameters map[string]interface{}, row RowType) string {
+func (c memoryExecutorContext) strings_Upper(arguments []interface{}, row RowType) string {
-	value := getFieldValue(arguments[0].(parsers.SelectItem), queryParameters, row)
+	value := c.getFieldValue(arguments[0].(parsers.SelectItem), row)
 	return strings.ToUpper(convertToString(value))
 }
 
-func strings_Lower(arguments []interface{}, queryParameters map[string]interface{}, row RowType) string {
+func (c memoryExecutorContext) strings_Lower(arguments []interface{}, row RowType) string {
-	value := getFieldValue(arguments[0].(parsers.SelectItem), queryParameters, row)
+	value := c.getFieldValue(arguments[0].(parsers.SelectItem), row)
 	return strings.ToLower(convertToString(value))
 }
 
-func strings_Left(arguments []interface{}, queryParameters map[string]interface{}, row RowType) string {
+func (c memoryExecutorContext) strings_Left(arguments []interface{}, row RowType) string {
 	var ok bool
 	var length int
-	str := parseString(arguments[0], queryParameters, row)
+	str := c.parseString(arguments[0], row)
-	lengthEx := getFieldValue(arguments[1].(parsers.SelectItem), queryParameters, row)
+	lengthEx := c.getFieldValue(arguments[1].(parsers.SelectItem), row)
 
 	if length, ok = lengthEx.(int); !ok {
 		fmt.Println("strings_Left - got parameters of wrong type")
@@ -133,28 +133,28 @@ func strings_Left(arguments []interface{}, queryParameters map[string]interface{
 	return str[:length]
 }
 
-func strings_Length(arguments []interface{}, queryParameters map[string]interface{}, row RowType) int {
+func (c memoryExecutorContext) strings_Length(arguments []interface{}, row RowType) int {
-	str := parseString(arguments[0], queryParameters, row)
+	str := c.parseString(arguments[0], row)
 	return len(str)
 }
 
-func strings_LTrim(arguments []interface{}, queryParameters map[string]interface{}, row RowType) string {
+func (c memoryExecutorContext) strings_LTrim(arguments []interface{}, row RowType) string {
-	str := parseString(arguments[0], queryParameters, row)
+	str := c.parseString(arguments[0], row)
 	return strings.TrimLeft(str, " ")
 }
 
-func strings_Replace(arguments []interface{}, queryParameters map[string]interface{}, row RowType) string {
+func (c memoryExecutorContext) strings_Replace(arguments []interface{}, row RowType) string {
-	str := parseString(arguments[0], queryParameters, row)
+	str := c.parseString(arguments[0], row)
-	oldStr := parseString(arguments[1], queryParameters, row)
+	oldStr := c.parseString(arguments[1], row)
-	newStr := parseString(arguments[2], queryParameters, row)
+	newStr := c.parseString(arguments[2], row)
 	return strings.Replace(str, oldStr, newStr, -1)
 }
 
-func strings_Replicate(arguments []interface{}, queryParameters map[string]interface{}, row RowType) string {
+func (c memoryExecutorContext) strings_Replicate(arguments []interface{}, row RowType) string {
 	var ok bool
 	var times int
-	str := parseString(arguments[0], queryParameters, row)
+	str := c.parseString(arguments[0], row)
-	timesEx := getFieldValue(arguments[1].(parsers.SelectItem), queryParameters, row)
+	timesEx := c.getFieldValue(arguments[1].(parsers.SelectItem), row)
 
 	if times, ok = timesEx.(int); !ok {
 		fmt.Println("strings_Replicate - got parameters of wrong type")
@@ -172,8 +172,8 @@ func strings_Replicate(arguments []interface{}, queryParameters map[string]inter
 	return strings.Repeat(str, times)
 }
 
-func strings_Reverse(arguments []interface{}, queryParameters map[string]interface{}, row RowType) string {
+func (c memoryExecutorContext) strings_Reverse(arguments []interface{}, row RowType) string {
-	str := parseString(arguments[0], queryParameters, row)
+	str := c.parseString(arguments[0], row)
 	runes := []rune(str)
 
 	for i, j := 0, len(runes)-1; i < j; i, j = i+1, j-1 {
@@ -183,11 +183,11 @@ func strings_Reverse(arguments []interface{}, queryParameters map[string]interfa
 	return string(runes)
 }
 
-func strings_Right(arguments []interface{}, queryParameters map[string]interface{}, row RowType) string {
+func (c memoryExecutorContext) strings_Right(arguments []interface{}, row RowType) string {
 	var ok bool
 	var length int
-	str := parseString(arguments[0], queryParameters, row)
+	str := c.parseString(arguments[0], row)
-	lengthEx := getFieldValue(arguments[1].(parsers.SelectItem), queryParameters, row)
+	lengthEx := c.getFieldValue(arguments[1].(parsers.SelectItem), row)
 
 	if length, ok = lengthEx.(int); !ok {
 		fmt.Println("strings_Right - got parameters of wrong type")
@@ -205,18 +205,18 @@ func strings_Right(arguments []interface{}, queryParameters map[string]interface
 	return str[len(str)-length:]
 }
 
-func strings_RTrim(arguments []interface{}, queryParameters map[string]interface{}, row RowType) string {
+func (c memoryExecutorContext) strings_RTrim(arguments []interface{}, row RowType) string {
-	str := parseString(arguments[0], queryParameters, row)
+	str := c.parseString(arguments[0], row)
 	return strings.TrimRight(str, " ")
 }
 
-func strings_Substring(arguments []interface{}, queryParameters map[string]interface{}, row RowType) string {
+func (c memoryExecutorContext) strings_Substring(arguments []interface{}, row RowType) string {
 	var ok bool
 	var startPos int
 	var length int
-	str := parseString(arguments[0], queryParameters, row)
+	str := c.parseString(arguments[0], row)
-	startPosEx := getFieldValue(arguments[1].(parsers.SelectItem), queryParameters, row)
+	startPosEx := c.getFieldValue(arguments[1].(parsers.SelectItem), row)
-	lengthEx := getFieldValue(arguments[2].(parsers.SelectItem), queryParameters, row)
+	lengthEx := c.getFieldValue(arguments[2].(parsers.SelectItem), row)
 
 	if startPos, ok = startPosEx.(int); !ok {
 		fmt.Println("strings_Substring - got start parameters of wrong type")
@@ -239,16 +239,16 @@ func strings_Substring(arguments []interface{}, queryParameters map[string]inter
 	return str[startPos:endPos]
 }
 
-func strings_Trim(arguments []interface{}, queryParameters map[string]interface{}, row RowType) string {
+func (c memoryExecutorContext) strings_Trim(arguments []interface{}, row RowType) string {
-	str := parseString(arguments[0], queryParameters, row)
+	str := c.parseString(arguments[0], row)
 	return strings.TrimSpace(str)
 }
 
-func getBoolFlag(arguments []interface{}, queryParameters map[string]interface{}, row RowType) bool {
+func (c memoryExecutorContext) getBoolFlag(arguments []interface{}, row RowType) bool {
 	ignoreCase := false
 	if len(arguments) > 2 && arguments[2] != nil {
 		ignoreCaseItem := arguments[2].(parsers.SelectItem)
-		if value, ok := getFieldValue(ignoreCaseItem, queryParameters, row).(bool); ok {
+		if value, ok := c.getFieldValue(ignoreCaseItem, row).(bool); ok {
 			ignoreCase = value
 		}
 	}
@@ -256,9 +256,9 @@ func getBoolFlag(arguments []interface{}, queryParameters map[string]interface{}
 	return ignoreCase
 }
 
-func parseString(argument interface{}, queryParameters map[string]interface{}, row RowType) string {
+func (c memoryExecutorContext) parseString(argument interface{}, row RowType) string {
 	exItem := argument.(parsers.SelectItem)
-	ex := getFieldValue(exItem, queryParameters, row)
+	ex := c.getFieldValue(exItem, row)
 	if str1, ok := ex.(string); ok {
 		return str1
 	}

query_executors/memory_executor/type_checking_functions.go

@@ -0,0 +1,96 @@
+package memoryexecutor
+
+import (
+	"math"
+
+	"github.com/pikami/cosmium/parsers"
+)
+
+func (c memoryExecutorContext) typeChecking_IsDefined(arguments []interface{}, row RowType) bool {
+	exItem := arguments[0].(parsers.SelectItem)
+	ex := c.getFieldValue(exItem, row)
+
+	return ex != nil
+}
+
+func (c memoryExecutorContext) typeChecking_IsArray(arguments []interface{}, row RowType) bool {
+	exItem := arguments[0].(parsers.SelectItem)
+	ex := c.getFieldValue(exItem, row)
+
+	_, isArray := ex.([]interface{})
+	return isArray
+}
+
+func (c memoryExecutorContext) typeChecking_IsBool(arguments []interface{}, row RowType) bool {
+	exItem := arguments[0].(parsers.SelectItem)
+	ex := c.getFieldValue(exItem, row)
+
+	_, isBool := ex.(bool)
+	return isBool
+}
+
+func (c memoryExecutorContext) typeChecking_IsFiniteNumber(arguments []interface{}, row RowType) bool {
+	exItem := arguments[0].(parsers.SelectItem)
+	ex := c.getFieldValue(exItem, row)
+
+	switch num := ex.(type) {
+	case int:
+		return true
+	case float64:
+		return !math.IsInf(num, 0) && !math.IsNaN(num)
+	default:
+		return false
+	}
+}
+
+func (c memoryExecutorContext) typeChecking_IsInteger(arguments []interface{}, row RowType) bool {
+	exItem := arguments[0].(parsers.SelectItem)
+	ex := c.getFieldValue(exItem, row)
+
+	_, isInt := ex.(int)
+	return isInt
+}
+
+func (c memoryExecutorContext) typeChecking_IsNull(arguments []interface{}, row RowType) bool {
+	exItem := arguments[0].(parsers.SelectItem)
+	ex := c.getFieldValue(exItem, row)
+
+	return ex == nil
+}
+
+func (c memoryExecutorContext) typeChecking_IsNumber(arguments []interface{}, row RowType) bool {
+	exItem := arguments[0].(parsers.SelectItem)
+	ex := c.getFieldValue(exItem, row)
+
+	_, isFloat := ex.(float64)
+	_, isInt := ex.(int)
+	return isFloat || isInt
+}
+
+func (c memoryExecutorContext) typeChecking_IsObject(arguments []interface{}, row RowType) bool {
+	exItem := arguments[0].(parsers.SelectItem)
+	ex := c.getFieldValue(exItem, row)
+
+	_, isObject := ex.(map[string]interface{})
+	return isObject
+}
+
+func (c memoryExecutorContext) typeChecking_IsPrimitive(arguments []interface{}, row RowType) bool {
+	exItem := arguments[0].(parsers.SelectItem)
+	ex := c.getFieldValue(exItem, row)
+
+	switch ex.(type) {
+	case bool, string, float64, int, nil:
+		return true
+	default:
+		return false
+	}
+}
+
+func (c memoryExecutorContext) typeChecking_IsString(arguments []interface{}, row RowType) bool {
+	exItem := arguments[0].(parsers.SelectItem)
+	ex := c.getFieldValue(exItem, row)
+
+	_, isStr := ex.(string)
+	return isStr
+}

tests.http

@@ -1,24 +0,0 @@
-### Create collection
-
-POST https://localhost:8081/dbs/db1/colls
-Content-Type: application/json
-
-{"id":"test1", "partitionKey":{"paths":["/pk"],"kind":"Hash","version":2}}
-
-### Insert document
-
-POST https://localhost:8081/dbs/db1/colls/test/docs
-Content-Type: application/json
-
-{"id":"1","_pk":"123","isCool":true}
-
-### Get all documents
-
-GET https://localhost:8081/dbs/db1/colls/test/docs
-
-### Query documents
-
-POST https://localhost:8081/dbs/db1/colls/test/docs
-Content-Type: application/json
-
-{"query":"SELECT c.id, c.isCool AS cool FROM c WHERE c.isCool = false"}