From a3033b59e6c8db0b1737a4a27bb69158e5605806 Mon Sep 17 00:00:00 2001
From: wangmm0220 <wangmm0220@gmail.com>
Date: Sat, 4 Jun 2022 11:19:38 +0800
Subject: [PATCH] fix:fix error in table scan by group

---
 source/libs/executor/src/scanoperator.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/source/libs/executor/src/scanoperator.c b/source/libs/executor/src/scanoperator.c
index 7eb8e9fea4..0774ccec1c 100644
--- a/source/libs/executor/src/scanoperator.c
+++ b/source/libs/executor/src/scanoperator.c
@@ -381,8 +381,7 @@ static SSDataBlock* doTableScanImpl(SOperatorInfo* pOperator) {
     uint64_t *groupId = taosHashGet(pTableScanInfo->pGroupSet, pTableScanInfo->keyBuf, len);
     if (groupId) {
       pBlock->info.groupId = *groupId;
-
-    }else{
+    }else if(len != 0){
       pBlock->info.groupId = calcGroupId(pTableScanInfo->keyBuf, len);
       taosHashPut(pTableScanInfo->pGroupSet, pTableScanInfo->keyBuf, len, &pBlock->info.groupId, sizeof(uint64_t));
     }