From 1175e8343f052b9b6f9c7cdfea49ae46a1dfd43e Mon Sep 17 00:00:00 2001
From: Haojun Liao <hjliao@taosdata.com>
Date: Tue, 16 Mar 2021 11:37:43 +0800
Subject: [PATCH] [td-225] add more check.

---
 src/query/src/qSqlParser.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/query/src/qSqlParser.c b/src/query/src/qSqlParser.c
index d7c708d9ef..e76b78c523 100644
--- a/src/query/src/qSqlParser.c
+++ b/src/query/src/qSqlParser.c
@@ -474,7 +474,10 @@ SFromInfo *setSubquery(SFromInfo* pFromInfo, SQuerySqlNode* pSqlNode) {
 }
 
 void* destroyFromInfo(SFromInfo* pFromInfo) {
-  assert(pFromInfo != NULL);
+  if (pFromInfo == NULL) {
+    return NULL;
+  }
+
   if (pFromInfo->type == SQL_NODE_FROM_NAMELIST) {
     taosArrayDestroy(pFromInfo->tableList);
   } else {
-- 
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