From b7165da5e354560a990eaf100bd86695ebef3f02 Mon Sep 17 00:00:00 2001
From: shenglian zhou <shenglian_zhou@163.com>
Date: Thu, 15 Jun 2023 16:10:28 +0800
Subject: [PATCH] fix: cleanup datablock so that varmeta length is right

---
 source/libs/executor/src/sysscanoperator.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/source/libs/executor/src/sysscanoperator.c b/source/libs/executor/src/sysscanoperator.c
index fd766e21f8..19c65e62cc 100644
--- a/source/libs/executor/src/sysscanoperator.c
+++ b/source/libs/executor/src/sysscanoperator.c
@@ -1593,6 +1593,8 @@ static SSDataBlock* doSysTableScan(SOperatorInfo* pOperator) {
   SSysTableScanInfo* pInfo = pOperator->info;
   char               dbName[TSDB_DB_NAME_LEN] = {0};
 
+  blockDataCleanup(pInfo->pRes);
+
   const char* name = tNameGetTableName(&pInfo->name);
   if (pInfo->showRewrite) {
     getDBNameFromCondition(pInfo->pCondition, dbName);