From b10a95f418fb17458cba31c6b545c865ba66f2eb Mon Sep 17 00:00:00 2001
From: shenglian zhou <slzhou@taosdata.com>
Date: Fri, 22 Jul 2022 16:46:01 +0800
Subject: [PATCH] fix: fix groud id comparision in table merge scan

---
 source/libs/executor/src/scanoperator.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/source/libs/executor/src/scanoperator.c b/source/libs/executor/src/scanoperator.c
index 574aa648e5..5101ade68a 100644
--- a/source/libs/executor/src/scanoperator.c
+++ b/source/libs/executor/src/scanoperator.c
@@ -3065,7 +3065,13 @@ int32_t getTableMergeScanExplainExecInfo(SOperatorInfo* pOptr, void** pOptrExpla
 int32_t compareTableKeyInfoByGid(const void* p1, const void* p2) {
   const STableKeyInfo* info1 = p1;
   const STableKeyInfo* info2 = p2;
-  return info1->groupId - info2->groupId;
+  if (info1->groupId - info2->groupId > 0) {
+    return 1;
+  } else if (info1->groupId < info2->groupId) {
+    return -1;
+  } else {
+    return 0;
+  }
 }
 
 SOperatorInfo* createTableMergeScanOperatorInfo(STableScanPhysiNode* pTableScanNode, STableListInfo* pTableListInfo,