[CP] If the ring exists and exits prematurely, only the allocator is cleaned when operator is closed in oracle DFS mode

src/sql/engine/recursive_cte/ob_recursive_inner_data_op.cpp

@@ -548,6 +548,7 @@ int ObRecursiveInnerDataOp::set_fake_cte_table_empty()
 
 void ObRecursiveInnerDataOp::destroy()
 {
+  dfs_pump_.destroy();
   stored_row_buf_.reset();
 }
 

src/sql/engine/recursive_cte/ob_search_method_op.cpp

@@ -187,6 +187,11 @@ int ObDepthFisrtSearchOp::init()
   return ret;
 }
 
+void ObDepthFisrtSearchOp::destroy()
+{
+  search_stack_.reset();
+}
+
 int ObDepthFisrtSearchOp::reuse()
 {
   ObSearchMethodOp::reuse();

src/sql/engine/recursive_cte/ob_search_method_op.h

@@ -232,7 +232,9 @@ public:
     }
   }
 
+
   virtual int finish_add_row(bool sort) override;
+  virtual void destroy();
   virtual int reuse() override;
   virtual int empty() override { return search_stack_.empty() && input_rows_.empty(); }