diff --git a/src/controller/admin/queryBuilderController.ts b/src/controller/admin/queryBuilderController.ts
index fdf93a1..312de93 100644
--- a/src/controller/admin/queryBuilderController.ts
+++ b/src/controller/admin/queryBuilderController.ts
@@ -41,14 +41,16 @@ export async function executeQuery(req: Request, res: Response): Promise<any> {
     let [rows, total] = await DynamicQueryBuilder.buildQuery(query, offset, count).getManyAndCount();
 
     res.json({
+      stats: "success",
       rows: rows,
       total: total,
       offset: offset,
       count: count,
     });
   } catch (error) {
-    res.status(500).send({
-      json: error.sql,
+    res.json({
+      stats: "error",
+      sql: error.sql,
       code: error.code,
       msg: error.sqlMessage,
     });
diff --git a/src/type/dynamicQueries.ts b/src/type/dynamicQueries.ts
index 5e69094..9e1f046 100644
--- a/src/type/dynamicQueries.ts
+++ b/src/type/dynamicQueries.ts
@@ -43,7 +43,9 @@ export type WhereOperation =
   | "notNull" //	Is not null
   | "between" //	Is between
   | "startsWith" //	Starts with
-  | "endsWith"; //	Ends with
+  | "endsWith" //	Ends with
+  | "timespanEq"; // Date before x years (YYYY-01-01 <bis> YYYY-12-31)
+// TODO: age between | age equals | age greater | age smaller
 
 export type OrderByStructure = {
   column: string;