From 8efeef908d9df5964441fed24ffa4e801f1dc8eb Mon Sep 17 00:00:00 2001
From: obdev <obdev@oceanbase.com>
Date: Thu, 9 Feb 2023 16:36:19 +0000
Subject: [PATCH] disable single side hash to NULL  strong sharding side for
 set

---
 src/sql/optimizer/ob_select_log_plan.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/sql/optimizer/ob_select_log_plan.cpp b/src/sql/optimizer/ob_select_log_plan.cpp
index fe22e71053..e77cece309 100644
--- a/src/sql/optimizer/ob_select_log_plan.cpp
+++ b/src/sql/optimizer/ob_select_log_plan.cpp
@@ -2965,7 +2965,9 @@ int ObSelectLogPlan::check_if_set_match_rehash(const EqualSets &equal_sets,
   ObSEArray<ObRawExpr*, 8> target_part_keys;
   ObShardingInfo *target_sharding = NULL;
   is_match_single_side_hash = false;
-  if (OB_ISNULL(target_sharding = target_child.get_sharding())) {
+  if (NULL == target_child.get_strong_sharding()) {
+    /* do nothing */
+  } else if (OB_ISNULL(target_sharding = target_child.get_sharding())) {
     ret = OB_ERR_UNEXPECTED;
     LOG_WARN("get unexpected null", K(ret));
   } else if (!target_sharding->is_distributed_without_table_location() ||