fix(query): return object instead of free it when error happens.

source/client/src/clientImpl.c

@@ -365,9 +365,8 @@ SRequestObj* launchQuery(STscObj* pTscObj, const char* sql, int sqlLen) {
 
   code = parseSql(pRequest, false, &pQuery, NULL);
   if (code != TSDB_CODE_SUCCESS) {
-    destroyRequest(pRequest);
-    terrno = code;
-    return NULL;
+    pRequest->code = code;
+    return pRequest;
   }
 
   return launchQueryImpl(pRequest, pQuery, code, false);
@@ -418,7 +417,7 @@ SRequestObj* execQuery(STscObj* pTscObj, const char* sql, int sqlLen) {
 
   while (retryNum++ < REQUEST_MAX_TRY_TIMES) {
     pRequest = launchQuery(pTscObj, sql, sqlLen);
-    if (TSDB_CODE_SUCCESS == pRequest->code || !NEED_CLIENT_HANDLE_ERROR(pRequest->code)) {
+    if (pRequest == NULL || TSDB_CODE_SUCCESS == pRequest->code || !NEED_CLIENT_HANDLE_ERROR(pRequest->code)) {
       break;
     }
 

source/libs/executor/src/executorimpl.c

@@ -4997,6 +4997,7 @@ static int32_t handleLimitOffset(SOperatorInfo* pOperator, SSDataBlock* pBlock)
   // check for the limitation in each group
   if (pProjectInfo->limit.limit > 0 && pProjectInfo->curOutput + pRes->info.rows >= pProjectInfo->limit.limit) {
     pRes->info.rows = (int32_t)(pProjectInfo->limit.limit - pProjectInfo->curOutput);
+    return PROJECT_RETRIEVE_DONE;
   }
 
   if (pRes->info.rows >= pOperator->resultInfo.threshold) {