diff --git a/src/sql/engine/aggregate/ob_hash_distinct_op.cpp b/src/sql/engine/aggregate/ob_hash_distinct_op.cpp
index 4d5632a8fe..b5cbdffa7b 100644
--- a/src/sql/engine/aggregate/ob_hash_distinct_op.cpp
+++ b/src/sql/engine/aggregate/ob_hash_distinct_op.cpp
@@ -47,7 +47,8 @@ ObHashDistinctOp::ObHashDistinctOp(ObExecContext &exec_ctx, const ObOpSpec &spec
     hash_values_for_batch_(nullptr),
     build_distinct_data_func_(&ObHashDistinctOp::build_distinct_data),
     build_distinct_data_batch_func_(&ObHashDistinctOp::build_distinct_data_for_batch),
-    bypass_ctrl_()
+    bypass_ctrl_(),
+    mem_context_(NULL)
 {
   enable_sql_dumped_ = GCONF.is_sql_operator_dump_enabled();
 }
@@ -65,6 +66,8 @@ int ObHashDistinctOp::inner_open()
                             ->get_sys_variable(share::SYS_VAR__GROUPBY_NOPUSHDOWN_CUT_RATIO,
                                                                             bypass_ctrl_.cut_ratio_))) {
     LOG_WARN("failed to get no pushdown cut ratio", K(ret));
+  } else if (OB_FAIL(init_mem_context())) {
+    LOG_WARN("failed to init mem context", K(ret));
   } else {
     first_got_row_ = true;
     tenant_id_ = ctx_.get_my_session()->get_effective_tenant_id();
@@ -134,6 +137,10 @@ void ObHashDistinctOp::destroy()
 {
   sql_mem_processor_.unregister_profile_if_necessary();
   hp_infras_.~ObHashPartInfrastructure();
+  if (OB_LIKELY(NULL != mem_context_)) {
+    DESTROY_CONTEXT(mem_context_);
+    mem_context_ = NULL;
+  }
   ObOperator::destroy();
 }
 
@@ -145,7 +152,7 @@ int ObHashDistinctOp::init_hash_partition_infras()
       &ctx_, MY_SPEC.px_est_size_factor_, est_rows, est_rows))) {
     LOG_WARN("failed to get px size", K(ret));
   } else if (OB_FAIL(sql_mem_processor_.init(
-                  &ctx_.get_allocator(),
+                  &mem_context_->get_malloc_allocator(),
                   tenant_id_,
                   est_rows * MY_SPEC.width_,
                   MY_SPEC.type_,
@@ -782,5 +789,20 @@ int ObHashDistinctOp::process_state(int64_t probe_cnt, bool &can_insert)
   return ret;
 }
 
+int ObHashDistinctOp::init_mem_context()
+{
+  int ret = OB_SUCCESS;
+  if (NULL == mem_context_) {
+    lib::ContextParam param;
+    param.set_mem_attr(ctx_.get_my_session()->get_effective_tenant_id(),
+        "ObHashDistRows",
+        ObCtxIds::WORK_AREA);
+    if (OB_FAIL(CURRENT_CONTEXT->CREATE_CONTEXT(mem_context_, param))) {
+      LOG_WARN("memory entity create failed", K(ret));
+    }
+  }
+  return ret;
+}
+
 } // end namespace sql
 } // end namespace oceanbase
diff --git a/src/sql/engine/aggregate/ob_hash_distinct_op.h b/src/sql/engine/aggregate/ob_hash_distinct_op.h
index f61cf9123c..f2233befbc 100644
--- a/src/sql/engine/aggregate/ob_hash_distinct_op.h
+++ b/src/sql/engine/aggregate/ob_hash_distinct_op.h
@@ -65,6 +65,7 @@ private:
   int build_distinct_data_for_batch_by_pass(const int64_t batch_size, bool is_block);
   int by_pass_get_next_batch(const int64_t batch_size);
   int process_state(int64_t probe_cnt, bool &can_insert);
+  int init_mem_context();
 private:
   const int64_t EXTEND_BKT_NUM_PUSH_DOWN = INIT_L3_CACHE_SIZE / sizeof(ObHashPartCols);
   typedef int (ObHashDistinctOp::*GetNextRowFunc)();
@@ -88,6 +89,7 @@ private:
   Build_distinct_data_func build_distinct_data_func_;
   Build_distinct_data_batch_func build_distinct_data_batch_func_;
   ObAdaptiveByPassCtrl bypass_ctrl_;
+  lib::MemoryContext mem_context_;
 };
 
 } // end namespace sql
diff --git a/src/sql/engine/aggregate/ob_hash_groupby_op.cpp b/src/sql/engine/aggregate/ob_hash_groupby_op.cpp
index 33b986e3d5..a4287f8948 100644
--- a/src/sql/engine/aggregate/ob_hash_groupby_op.cpp
+++ b/src/sql/engine/aggregate/ob_hash_groupby_op.cpp
@@ -659,7 +659,7 @@ int ObHashGroupByOp::init_distinct_info(bool is_part)
       &ctx_, MY_SPEC.px_est_size_factor_, est_rows, est_rows))) {
     LOG_WARN("failed to get px size", K(ret));
   } else if (OB_FAIL(distinct_sql_mem_processor_.init(
-                  &ctx_.get_allocator(),
+                  &mem_context_->get_malloc_allocator(),
                   tenant_id,
                   est_size,
                   MY_SPEC.type_,
diff --git a/src/sql/engine/set/ob_hash_set_op.cpp b/src/sql/engine/set/ob_hash_set_op.cpp
index 6d08066917..e1274242bb 100644
--- a/src/sql/engine/set/ob_hash_set_op.cpp
+++ b/src/sql/engine/set/ob_hash_set_op.cpp
@@ -39,7 +39,8 @@ ObHashSetOp::ObHashSetOp(ObExecContext &exec_ctx, const ObOpSpec &spec, ObOpInpu
   hp_infras_(),
   hash_values_for_batch_(nullptr),
   need_init_(true),
-  left_brs_(nullptr)
+  left_brs_(nullptr),
+  mem_context_(nullptr)
 {
 }
 
@@ -51,6 +52,8 @@ int ObHashSetOp::inner_open()
     LOG_WARN("unexpected status: left or right is null", K(ret), K(left_), K(right_));
   } else if (OB_FAIL(ObOperator::inner_open())) {
     LOG_WARN("failed to inner open", K(ret));
+  } else if (OB_FAIL(init_mem_context())) {
+    LOG_WARN("failed to init mem context", K(ret));
   }
   return ret;
 }
@@ -90,6 +93,10 @@ void ObHashSetOp::destroy()
 {
   sql_mem_processor_.unregister_profile_if_necessary();
   hp_infras_.~ObHashPartInfrastructure();
+  if (OB_LIKELY(NULL != mem_context_)) {
+    DESTROY_CONTEXT(mem_context_);
+    mem_context_ = NULL;
+  }
   ObOperator::destroy();
 }
 
@@ -162,7 +169,7 @@ int ObHashSetOp::build_hash_table(bool from_child)
         hp_infras_.get_cur_part_row_cnt(InputSide::RIGHT)))) {
       LOG_WARN("failed to init hash table", K(ret));
     } else if (OB_FAIL(sql_mem_processor_.init(
-                  &ctx_.get_allocator(),
+                  &mem_context_->get_malloc_allocator(),
                   ctx_.get_my_session()->get_effective_tenant_id(),
                   hp_infras_.get_cur_part_file_size(InputSide::RIGHT),
                   spec_.type_,
@@ -215,7 +222,7 @@ int ObHashSetOp::build_hash_table_from_left(bool from_child)
         hp_infras_.get_cur_part_row_cnt(InputSide::LEFT)))) {
       LOG_WARN("failed to init hash table", K(ret));
     } else if (OB_FAIL(sql_mem_processor_.init(
-                  &ctx_.get_allocator(),
+                  &mem_context_->get_malloc_allocator(),
                   ctx_.get_my_session()->get_effective_tenant_id(),
                   hp_infras_.get_cur_part_file_size(InputSide::LEFT),
                   spec_.type_,
@@ -267,7 +274,7 @@ int ObHashSetOp::build_hash_table_from_left_batch(bool from_child, const int64_t
         hp_infras_.get_cur_part_row_cnt(InputSide::LEFT)))) {
       LOG_WARN("failed to init hash table", K(ret));
     } else if (OB_FAIL(sql_mem_processor_.init(
-                  &ctx_.get_allocator(),
+                  &mem_context_->get_malloc_allocator(),
                   ctx_.get_my_session()->get_effective_tenant_id(),
                   hp_infras_.get_cur_part_file_size(InputSide::LEFT),
                   spec_.type_,
@@ -327,7 +334,7 @@ int ObHashSetOp::init_hash_partition_infras()
       &ctx_, get_spec().px_est_size_factor_, est_rows, est_rows))) {
     LOG_WARN("failed to get px size", K(ret));
   } else if (OB_FAIL(sql_mem_processor_.init(
-                  &ctx_.get_allocator(),
+                  &mem_context_->get_malloc_allocator(),
                   ctx_.get_my_session()->get_effective_tenant_id(),
                   est_rows * get_spec().width_,
                   get_spec().type_,
@@ -433,5 +440,20 @@ int ObHashSetOp::init_hash_partition_infras_for_batch()
   return ret;
 }
 
+int ObHashSetOp::init_mem_context()
+{
+  int ret = OB_SUCCESS;
+  if (NULL == mem_context_) {
+    lib::ContextParam param;
+    param.set_mem_attr(ctx_.get_my_session()->get_effective_tenant_id(),
+        "ObHashSetRows",
+        ObCtxIds::WORK_AREA);
+    if (OB_FAIL(CURRENT_CONTEXT->CREATE_CONTEXT(mem_context_, param))) {
+      LOG_WARN("memory entity create failed", K(ret));
+    }
+  }
+  return ret;
+}
+
 } // end namespace sql
 } // end namespace oceanbase
diff --git a/src/sql/engine/set/ob_hash_set_op.h b/src/sql/engine/set/ob_hash_set_op.h
index f710949708..b357883b56 100644
--- a/src/sql/engine/set/ob_hash_set_op.h
+++ b/src/sql/engine/set/ob_hash_set_op.h
@@ -62,6 +62,7 @@ protected:
                     const common::ObIArray<ObExpr*> &dst_exprs,
                     const int64_t batch_size,
                     const ObBitVector &skip);
+  int init_mem_context();
 
 protected:
     //used by intersect and except
@@ -74,6 +75,7 @@ protected:
     //for batch array init, not reset in rescan
     bool need_init_;
     const ObBatchRows *left_brs_;
+    lib::MemoryContext mem_context_;
 };
 
 } // end namespace sql