refactor(query): do some internal refactor.

source/libs/executor/src/executorimpl.c

@@ -2420,17 +2420,19 @@ static void doTableQueryInfoTimeWindowCheck(SExecTaskInfo* pTaskInfo, STableQuer
 
 int32_t loadRemoteDataCallback(void* param, const SDataBuf* pMsg, int32_t code) {
   SSourceDataInfo* pSourceDataInfo = (SSourceDataInfo*)param;
+  int32_t index = pSourceDataInfo->index;
+
   if (code == TSDB_CODE_SUCCESS) {
     pSourceDataInfo->pRsp = pMsg->pData;
 
     SRetrieveTableRsp* pRsp = pSourceDataInfo->pRsp;
     pRsp->numOfRows = htonl(pRsp->numOfRows);
-    pRsp->compLen = htonl(pRsp->compLen);
+    pRsp->compLen   = htonl(pRsp->compLen);
     pRsp->numOfCols = htonl(pRsp->numOfCols);
-    pRsp->useconds = htobe64(pRsp->useconds);
+    pRsp->useconds  = htobe64(pRsp->useconds);
 
-    ASSERT(pSourceDataInfo->pRsp != NULL);
-    qDebug("fetch rsp received, index:%d, rows:%d", pSourceDataInfo->index, pRsp->numOfRows);
+    ASSERT(pRsp != NULL);
+    qDebug("fetch rsp received, index:%d, rows:%d", index, pRsp->numOfRows);
   } else {
     pSourceDataInfo->code = code;
   }
@@ -2628,6 +2630,8 @@ static SSDataBlock* concurrentlyLoadRemoteDataImpl(SOperatorInfo* pOperator, SEx
 
   while (1) {
     int32_t completed = 0;
+    tsem_wait(&pExchangeInfo->ready);
+
     for (int32_t i = 0; i < totalSources; ++i) {
       SSourceDataInfo* pDataInfo = taosArrayGet(pExchangeInfo->pSourceDataInfo, i);
       if (pDataInfo->status == EX_SOURCE_DATA_EXHAUSTED) {
@@ -2725,7 +2729,6 @@ static int32_t prepareConcurrentlyLoad(SOperatorInfo* pOperator) {
   qDebug("%s send all fetch requests to %" PRIzu " sources completed, elapsed:%" PRId64, GET_TASKID(pTaskInfo),
          totalSources, endTs - startTs);
 
-  tsem_wait(&pExchangeInfo->ready);
   pOperator->status = OP_RES_TO_RETURN;
   pOperator->cost.openCost = taosGetTimestampUs() - startTs;