diff --git a/src/storage/access/ob_multiple_merge.cpp b/src/storage/access/ob_multiple_merge.cpp
index 4ec8509300..c9667fa31c 100644
--- a/src/storage/access/ob_multiple_merge.cpp
+++ b/src/storage/access/ob_multiple_merge.cpp
@@ -380,6 +380,9 @@ int ObMultipleMerge::get_next_row(ObDatumRow *&row)
 int ObMultipleMerge::get_next_rows(int64_t &count, int64_t capacity)
 {
   int ret = OB_SUCCESS;
+  if (OB_NOT_NULL(access_param_->get_op())) {
+    access_param_->get_op()->clear_evaluated_flag();
+  }
   count = 0;
   if (access_param_->iter_param_.enable_pd_aggregate()) {
     ObDatumRow *row = nullptr;
@@ -408,6 +411,9 @@ int ObMultipleMerge::get_next_rows(int64_t &count, int64_t capacity)
   } else {
     ret = get_next_normal_rows(count, capacity);
   }
+  if (OB_NOT_NULL(access_param_->get_op())) {
+    access_param_->get_op()->clear_evaluated_flag();
+  }
   return ret;
 }