fix mem leak issue

source/client/src/clientImpl.c

@@ -239,6 +239,8 @@ int32_t scheduleQuery(SRequestObj* pRequest, SQueryDag* pDag, SArray* pNodeList)
   if (TSDB_SQL_INSERT == pRequest->type || TSDB_SQL_CREATE_TABLE == pRequest->type) {
     SQueryResult res = {.code = 0, .numOfRows = 0, .msgSize = ERROR_MSG_BUF_DEFAULT_SIZE, .msg = pRequest->msgBuf};
 
+    taosArrayDestroy(pNodeList);
+
     int32_t code = schedulerExecJob(pRequest->pTscObj->pAppInfo->pTransporter, NULL, pDag, &pRequest->body.pQueryJob, &res);
     if (code != TSDB_CODE_SUCCESS) {
       // handle error and retry