[to #41932470] fix memory of udf

src/sql/engine/expr/ob_expr.h

@@ -192,7 +192,7 @@ struct ObEvalCtx
     int64_t batch_idx_default_val_ = 0;
     int64_t batch_size_default_val_ = 0;
   };
-  explicit ObEvalCtx(ObExecContext &exec_ctx);
+  explicit ObEvalCtx(ObExecContext &exec_ctx, ObIAllocator *allocator = NULL);
   explicit ObEvalCtx(ObEvalCtx &eval_ctx);
   virtual ~ObEvalCtx();