From c3413fd830c94e300fbbfec7e7ebfe55d7d46792 Mon Sep 17 00:00:00 2001
From: Liu Jicong <liujicong@qq.com>
Date: Thu, 5 Aug 2021 10:34:24 +0800
Subject: [PATCH] fix realloc usage in tdataformat

---
 src/common/src/tdataformat.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/common/src/tdataformat.c b/src/common/src/tdataformat.c
index 3f0ab7f93e..70911c88a6 100644
--- a/src/common/src/tdataformat.c
+++ b/src/common/src/tdataformat.c
@@ -357,8 +357,9 @@ int tdInitDataCols(SDataCols *pCols, STSchema *pSchema) {
   int oldMaxCols = pCols->maxCols;
   if (schemaNCols(pSchema) > oldMaxCols) {
     pCols->maxCols = schemaNCols(pSchema);
-    pCols->cols = (SDataCol *)realloc(pCols->cols, sizeof(SDataCol) * pCols->maxCols);
-    if (pCols->cols == NULL) return -1;
+    void* ptr = (SDataCol *)realloc(pCols->cols, sizeof(SDataCol) * pCols->maxCols);
+    if (ptr == NULL) return -1;
+    pCols->cols = ptr;
     for(i = oldMaxCols; i < pCols->maxCols; i++) {
       pCols->cols[i].pData = NULL;
       pCols->cols[i].dataOff = NULL;