fix(query): clear buffer before set data.

source/common/src/tdatablock.c

@@ -1201,7 +1201,7 @@ SSDataBlock* createOneDataBlock(const SSDataBlock* pDataBlock, bool copyData) {
   pBlock->info.rows = 0;
   pBlock->info.capacity = 0;
 
-  size_t numOfCols = taosArrayGetSize(pBlock->pDataBlock);
+  size_t numOfCols = taosArrayGetSize(pDataBlock->pDataBlock);
   for (int32_t i = 0; i < numOfCols; ++i) {
     SColumnInfoData* p = taosArrayGet(pDataBlock->pDataBlock, i);
     SColumnInfoData  colInfo = {.hasNull = true, .info = p->info};

source/libs/executor/src/executorimpl.c

@@ -2047,6 +2047,8 @@ int32_t extractDataBlockFromFetchRsp(SSDataBlock* pRes, SLoadRemoteDataInfo* pLo
                                      int32_t compLen, int32_t numOfOutput, int64_t startTs, uint64_t* total,
                                      SArray* pColList) {
   if (pColList == NULL) {  // data from other sources
+    blockDataCleanup(pRes);
+    blockDataEnsureCapacity(pRes, numOfRows);
     blockCompressDecode(pRes, numOfOutput, numOfRows, pData);
     pRes->info.rows = numOfRows;
   } else {  // extract data according to pColList