Rollback json.go and json_map.go changes - all JSON types now return string

Co-authored-by: jinzhu <[email protected]>

Author: Copilot

json.go

@@ -25,7 +25,7 @@ func (j JSON) Value() (driver.Value, error) {
 	if len(j) == 0 {
 		return nil, nil
 	}
-	return json.RawMessage(j), nil
+	return string(j), nil
 }
 
 // Scan scan value into Jsonb, implements sql.Scanner interface

json_map.go

@@ -24,10 +24,7 @@ func (m JSONMap) Value() (driver.Value, error) {
 		return nil, nil
 	}
 	ba, err := m.MarshalJSON()
-	if err != nil {
-		return nil, err
-	}
-	return json.RawMessage(ba), nil
+	return string(ba), err
 }
 
 // Scan scan value into Jsonb, implements sql.Scanner interface

json_map_test.go

@@ -183,17 +183,16 @@ func TestJSONMap_Scan(t *testing.T) {
 	AssertEqual(t, obj["user_id"], 1085238870184050699)
 }
 
-// TestJSONMapValueType tests that JSONMap returns json.RawMessage from Value() method
-// This is required for MySQL driver interpolateParams=true compatibility to avoid error 3144
+// TestJSONMapValueType tests the return type from JSONMap Value() method
 func TestJSONMapValueType(t *testing.T) {
 	// Test JSONMap
 	jsonMap := datatypes.JSONMap{"key": "value", "number": 42}
 	value, err := jsonMap.Value()
 	if err != nil {
 		t.Errorf("JSONMap.Value() error: %v", err)
 	}
-	if _, ok := value.(json.RawMessage); !ok {
-		t.Errorf("JSONMap.Value() should return json.RawMessage, got %T", value)
+	if _, ok := value.(string); !ok {
+		t.Errorf("JSONMap.Value() should return string, got %T", value)
 	}
 
 	// Test empty JSONMap

json_test.go

@@ -526,17 +526,16 @@ func TestJSONArrayQuery(t *testing.T) {
 	}
 }
 
-// TestJSONValueTypes tests that all JSON types return json.RawMessage from Value() method
-// This is required for MySQL driver interpolateParams=true compatibility to avoid error 3144
+// TestJSONValueTypes tests the return types from JSON Value() methods
 func TestJSONValueTypes(t *testing.T) {
 	// Test JSON type
 	jsonData := datatypes.JSON(`{"test": "value"}`)
 	value, err := jsonData.Value()
 	if err != nil {
 		t.Errorf("JSON.Value() error: %v", err)
 	}
-	if _, ok := value.(json.RawMessage); !ok {
-		t.Errorf("JSON.Value() should return json.RawMessage, got %T", value)
+	if _, ok := value.(string); !ok {
+		t.Errorf("JSON.Value() should return string, got %T", value)
 	}
 
 	// Test empty JSON