Add Support for Vector Data Type in SQL for GraphQL

config-generators/mssql-commands.txt

@@ -16,7 +16,7 @@ add Broker --config "dab-config.MsSql.json" --source brokers --permissions "anon
 add WebsiteUser --config "dab-config.MsSql.json" --source website_users --permissions "anonymous:create,read,delete,update"
 add WebsiteUser_MM --config "dab-config.MsSql.json" --source website_users_mm --graphql "websiteuser_mm:websiteusers_mm" --permissions "anonymous:*"
 add SupportedType --config "dab-config.MsSql.json" --source type_table --permissions "anonymous:create,read,delete,update"
-add VectorType --config "dab-config.MsSql.json" --source vector_type_table --rest true --graphql false --permissions "anonymous:create,read,delete,update"
+add VectorType --config "dab-config.MsSql.json" --source vector_type_table --rest true --graphql true --permissions "anonymous:create,read,delete,update"
 update VectorType --config "dab-config.MsSql.json" --permissions "authenticated:create,read,delete,update"
 add stocks_price --config "dab-config.MsSql.json" --source stocks_price --permissions "authenticated:create,read,update,delete"
 update stocks_price --config "dab-config.MsSql.json" --permissions "anonymous:read"

src/Core/Resolvers/MultipleCreateOrderHelper.cs

@@ -385,7 +385,7 @@ private static RelationshipFields GetRelationshipFieldsInSourceAndTarget(
             foreach (ObjectFieldNode field in fieldNodes)
             {
                 Tuple<IValueNode?, SyntaxKind> fieldDetails = GraphQLUtils.GetFieldDetails(field.Value, context.Variables);
-                SyntaxKind fieldKind = fieldDetails.Item2;
+                SyntaxKind fieldKind = metadataProvider.TryGetUnderlyingFieldKind(entityName, field.Name.Value, out SyntaxKind arrayFieldKind) ? arrayFieldKind : fieldDetails.Item2;
                 if (GraphQLUtils.IsScalarField(fieldKind) && metadataProvider.TryGetBackingColumn(entityName, field.Name.Value, out string? backingColumnName))
                 {
                     backingColumnData.Add(backingColumnName, fieldDetails.Item1);

src/Core/Resolvers/Sql Query Structures/BaseSqlQueryStructure.cs

@@ -698,5 +698,22 @@ protected object GetParamAsSystemType(string fieldValue, string fieldName, Type
 
             }
         }
+
+        /// <summary>
+        /// Transforms the value of an object as a string.
+        /// Array/vector columns (e.g. SQL Server 'vector') arrive as a List<IValueNode>.
+        /// Calling ToString() on a list/array only yields the CLR type name, so instead extract
+        /// the underlying element values and serialize them into a JSON array string (e.g. "[1.5,2.5,3.5]").
+        /// </summary>
+        /// <param name="value">The value to be transformed into a string.</param>
+        /// <returns>A string representation of the value.</returns>
+        protected static string GetStringifiedValue(object value)
+        {
+            return value switch
+            {
+                IEnumerable<IValueNode> valueNodes => JsonSerializer.Serialize(valueNodes.Select(TypeHelper.GetValue)),
+                _ => value.ToString()!
+            };
+        }
     }
 }

src/Core/Resolvers/Sql Query Structures/SqlInsertQueryStructure.cs

@@ -111,8 +111,9 @@ private void PopulateColumnsAndParams(string columnName, object? value)
 
             if (value is not null)
             {
+                string stringValue = GetStringifiedValue(value);
                 paramName = MakeDbConnectionParam(
-                    GetParamAsSystemType(value.ToString()!, columnName, GetColumnSystemType(columnName)), columnName);
+                    GetParamAsSystemType(stringValue, columnName, GetColumnSystemType(columnName)), columnName);
             }
             else
             {

src/Core/Resolvers/Sql Query Structures/SqlUpdateQueryStructure.cs

@@ -183,11 +183,12 @@ private Predicate CreatePredicateForParam(KeyValuePair<string, object?> param)
             }
             else
             {
+                string stringValue = GetStringifiedValue(param.Value);
                 predicate = new(
                     new PredicateOperand(
                         new Column(tableSchema: DatabaseObject.SchemaName, tableName: DatabaseObject.Name, backingColumn)),
                     PredicateOperation.Equal,
-                    new PredicateOperand($"{MakeDbConnectionParam(GetParamAsSystemType(param.Value.ToString()!, backingColumn, GetColumnSystemType(backingColumn)), backingColumn)}"));
+                    new PredicateOperand($"{MakeDbConnectionParam(GetParamAsSystemType(stringValue, backingColumn, GetColumnSystemType(backingColumn)), backingColumn)}"));
             }
 
             return predicate;

src/Core/Resolvers/SqlMutationEngine.cs

@@ -1088,7 +1088,7 @@ await queryExecutor.ExecuteQueryAsync(
             string rootFieldName = isMultipleInputType ? MULTIPLE_INPUT_ARGUEMENT_NAME : SINGLE_INPUT_ARGUEMENT_NAME;
 
             // Parse the hotchocolate input parameters into .net object types
-            object? parsedInputParams = GQLMultipleCreateArgumentToDictParams(context, rootFieldName, mutationInputParamsFromGQLContext);
+            object? parsedInputParams = GQLMultipleCreateArgumentToDictParams(context, rootFieldName, mutationInputParamsFromGQLContext, sqlMetadataProvider, entityName);
 
             if (parsedInputParams is null)
             {
@@ -1758,14 +1758,16 @@ private static void PopulateCurrentAndLinkingEntityParams(
         internal static object? GQLMultipleCreateArgumentToDictParams(
                 IMiddlewareContext context,
                 string rootFieldName,
-                IDictionary<string, object?> mutationParameters)
+                IDictionary<string, object?> mutationParameters,
+                ISqlMetadataProvider metadataProvider,
+                string entityName)
         {
             if (mutationParameters.TryGetValue(rootFieldName, out object? inputParameters))
             {
                 ObjectField fieldSchema = context.Selection.Field;
                 IInputValueDefinition itemsArgumentSchema = fieldSchema.Arguments[rootFieldName];
                 InputObjectType inputObjectType = ExecutionHelper.InputObjectTypeFromIInputField(itemsArgumentSchema);
-                return GQLMultipleCreateArgumentToDictParamsHelper(context, inputObjectType, inputParameters);
+                return GQLMultipleCreateArgumentToDictParamsHelper(context, inputObjectType, inputParameters, metadataProvider, entityName);
             }
             else
             {
@@ -1813,7 +1815,9 @@ private static void PopulateCurrentAndLinkingEntityParams(
         internal static object? GQLMultipleCreateArgumentToDictParamsHelper(
             IMiddlewareContext context,
             InputObjectType inputObjectType,
-            object? inputParameters)
+            object? inputParameters,
+            ISqlMetadataProvider metadataProvider,
+            string entityName)
         {
             // This condition is met for input types that accept an array of values
             // where the mutation input field is 'items' such as
@@ -1835,7 +1839,9 @@ private static void PopulateCurrentAndLinkingEntityParams(
                     object? parsedInputFieldItem = GQLMultipleCreateArgumentToDictParamsHelper(
                                             context: context,
                                             inputObjectType: inputObjectType,
-                                            inputParameters: inputField.Value);
+                                            inputParameters: inputField.Value,
+                                            metadataProvider: metadataProvider,
+                                            entityName: entityName);
                     if (parsedInputFieldItem is not null)
                     {
                         parsedInputFieldItems.Add((IDictionary<string, object?>)parsedInputFieldItem);
@@ -1862,33 +1868,40 @@ private static void PopulateCurrentAndLinkingEntityParams(
                 foreach (ObjectFieldNode inputFieldNode in inputFieldNodes)
                 {
                     string fieldName = inputFieldNode.Name.Value;
+                    SyntaxKind fieldKind = metadataProvider.TryGetUnderlyingFieldKind(entityName, fieldName, out SyntaxKind arrayFieldKind)
+                        ? arrayFieldKind : inputFieldNode.Value.Kind;
+
                     // For the mutation pointMultipleCreateExample (outlined in the method summary),
                     // the following condition will evaluate to true for fields 'authors' and 'reviews'.
                     // Fields 'authors'/'reviews' can again consist of combination of scalar and relationship fields.
                     // So, the input object type for 'authors'/'reviews' is fetched and the same function is
                     // invoked with the fetched input object type again to parse the input fields of 'authors'/'reviews'.
-                    if (inputFieldNode.Value.Kind == SyntaxKind.ListValue)
+                    if (fieldKind == SyntaxKind.ListValue)
                     {
                         parsedInputFields.Add(
                             fieldName,
                             GQLMultipleCreateArgumentToDictParamsHelper(
                                 context,
                                 GetInputObjectTypeForAField(fieldName, inputObjectType.Fields),
-                                inputFieldNode.Value.Value));
+                                inputFieldNode.Value.Value,
+                                metadataProvider,
+                                entityName));
                     }
                     // For the mutation pointMultipleCreateExample (outlined in the method summary),
                     // the following condition will evaluate to true for fields 'publishers'.
                     // Field 'publishers' can again consist of combination of scalar and relationship fields.
                     // So, the input object type for 'publishers' is fetched and the same function is
                     // invoked with the fetched input object type again to parse the input fields of 'publishers'.
-                    else if (inputFieldNode.Value.Kind == SyntaxKind.ObjectValue)
+                    else if (fieldKind == SyntaxKind.ObjectValue)
                     {
                         parsedInputFields.Add(
                             fieldName,
                             GQLMultipleCreateArgumentToDictParamsHelper(
                                 context,
                                 GetInputObjectTypeForAField(fieldName, inputObjectType.Fields),
-                                inputFieldNode.Value.Value));
+                                inputFieldNode.Value.Value,
+                                metadataProvider,
+                                entityName));
                     }
                     // The flow enters this block for all scalar input fields.
                     else
@@ -2366,7 +2379,7 @@ private void ProcessObjectFieldNodesForAuthZ(
             foreach (ObjectFieldNode field in fieldNodes)
             {
                 Tuple<IValueNode?, SyntaxKind> fieldDetails = GraphQLUtils.GetFieldDetails(field.Value, context.Variables);
-                SyntaxKind underlyingFieldKind = fieldDetails.Item2;
+                SyntaxKind underlyingFieldKind = metadataProvider.TryGetUnderlyingFieldKind(entityName, field.Name.Value, out SyntaxKind arrayFieldKind) ? arrayFieldKind : fieldDetails.Item2;
 
                 // For a column field, we do not have to recurse to process fields in the value - which is required for relationship fields.
                 if (GraphQLUtils.IsScalarField(underlyingFieldKind) || underlyingFieldKind is SyntaxKind.NullValue)