diff --git a/source/client/src/clientSml.c b/source/client/src/clientSml.c
index 7492258d2e5c6fe1ea8843769b15bb83f2dfb261..d1278d371f25cfcf40780ddc77d787d8565ddb87 100644
--- a/source/client/src/clientSml.c
+++ b/source/client/src/clientSml.c
@@ -1410,8 +1410,8 @@ static int32_t smlInsertData(SSmlHandle *info) {
     memcpy(measure, tableData->sTableName, tableData->sTableNameLen);
     PROCESS_SLASH_IN_MEASUREMENT(measure, measureLen);
     smlStrReplace(measure, measureLen);
-
-    tstrncpy(pName.tname, measure, measureLen + 1);
+    memset(pName.tname, 0, TSDB_TABLE_NAME_LEN);
+    memcpy(pName.tname, measure, measureLen);
 
     if (info->pRequest->tableList == NULL) {
       info->pRequest->tableList = taosArrayInit(1, sizeof(SName));