fix(query): remove the invalid capacity changing.

source/common/src/tdatablock.c

@@ -246,7 +246,7 @@ int32_t colDataMergeCol(SColumnInfoData* pColumnInfoData, int32_t numOfRow1, int
   uint32_t finalNumOfRows = numOfRow1 + numOfRow2;
   if (IS_VAR_DATA_TYPE(pColumnInfoData->info.type)) {
     // Handle the bitmap
-    if (finalNumOfRows > *capacity || (numOfRow1 == 0 && pColumnInfoData->info.bytes != 0)) {
+    if (finalNumOfRows > (*capacity)) {
       char* p = taosMemoryRealloc(pColumnInfoData->varmeta.offset, sizeof(int32_t) * (numOfRow1 + numOfRow2));
       if (p == NULL) {
         return TSDB_CODE_OUT_OF_MEMORY;

source/libs/executor/src/scanoperator.c

@@ -620,7 +620,7 @@ static SSDataBlock* doTableScanImpl(SOperatorInfo* pOperator) {
     int32_t rows = 0;
     tsdbRetrieveDataBlockInfo(pTableScanInfo->dataReader, &rows, &pBInfo->uid, &pBInfo->window);
 
-    blockDataEnsureCapacity(pBlock, rows);
+    blockDataEnsureCapacity(pBlock, rows);  // todo remove it latter
     pBInfo->rows = rows;
 
     ASSERT(pBInfo->uid != 0);