From 475c03a3c2334aef0218804e1f494f85820be5d6 Mon Sep 17 00:00:00 2001
From: hjxilinx <hjxilinx@163.com>
Date: Thu, 9 Jan 2020 10:20:25 +0800
Subject: [PATCH] add more security check for async union processing.

---
 src/client/src/tscUtil.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/client/src/tscUtil.c b/src/client/src/tscUtil.c
index 9825d677dc..6ffcdb0e74 100644
--- a/src/client/src/tscUtil.c
+++ b/src/client/src/tscUtil.c
@@ -2005,7 +2005,7 @@ bool hasMoreVnodesToTry(SSqlObj* pSql) {
   SQueryInfo* pQueryInfo = tscGetQueryInfoDetail(pCmd, pCmd->clauseIndex);
   
   SMeterMetaInfo* pMeterMetaInfo = tscGetMeterMetaInfoFromQueryInfo(pQueryInfo, 0);
-  if (!UTIL_METER_IS_SUPERTABLE(pMeterMetaInfo)) {
+  if (!UTIL_METER_IS_SUPERTABLE(pMeterMetaInfo) || (pMeterMetaInfo->pMetricMeta == NULL)) {
     return false;
   }
   
-- 
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