diff --git a/be/src/vec/exec/vtable_function_node.h b/be/src/vec/exec/vtable_function_node.h
index db88147cf4..9477988047 100644
--- a/be/src/vec/exec/vtable_function_node.h
+++ b/be/src/vec/exec/vtable_function_node.h
@@ -56,9 +56,12 @@ public:
     Status prepare(RuntimeState* state) override;
     Status open(RuntimeState* state) override {
         RETURN_IF_ERROR(alloc_resource(state));
-        RETURN_IF_ERROR(VExpr::open(_vfn_ctxs, state));
         return _children[0]->open(state);
     }
+    Status alloc_resource(RuntimeState* state) override {
+        RETURN_IF_ERROR(ExecNode::alloc_resource(state));
+        return VExpr::open(_vfn_ctxs, state);
+    }
     Status get_next(RuntimeState* state, Block* block, bool* eos) override;
     bool need_more_input_data() const { return !_child_block.rows() && !_child_eos; }