refactor: do some internal refactor.

source/libs/executor/src/executil.c

@@ -895,13 +895,15 @@ static void doSetQualifiedUid(SArray* pUidList, const SArray* pUidTagList, bool*
 
 static void copyExistedUids(SArray* pUidTagList, const SArray* pUidList) {
   int32_t numOfExisted = taosArrayGetSize(pUidList);
-  if (numOfExisted) {
+  if (numOfExisted == 0) {
+    return;
+  }
+
   for(int32_t i = 0; i < numOfExisted; ++i) {
     uint64_t* uid = taosArrayGet(pUidList, i);
     STUidTagInfo info = {.uid = *uid};
     taosArrayPush(pUidTagList, &info);
   }
-  }
 }
 
 static int32_t doFilterByTagCond(STableListInfo* pListInfo, SArray* pUidList, SNode* pTagCond, void* metaHandle) {
@@ -1065,7 +1067,6 @@ int32_t getTableList(void* metaHandle, void* pVnode, SScanPhysiNode* pScanNode,
       size_t size = numOfTables * sizeof(uint64_t) + sizeof(int32_t);
       char*  pPayload = taosMemoryMalloc(size);
 
-      // todo convert to uid list
       if (numOfTables > 0) {
         *(int32_t*)pPayload = numOfTables;
       memcpy(pPayload + sizeof(int32_t), taosArrayGet(pRes, 0), numOfTables * sizeof(uint64_t));