fix(query): set correct buffer page size.

source/libs/executor/src/scanoperator.c

@@ -2170,25 +2170,17 @@ SSDataBlock* getSortedTableMergeScanBlockData(SSortHandle* pHandle, int32_t capa
   blockDataEnsureCapacity(p, capacity);
 
   while (1) {
-    STupleHandle* pTupleHandle = NULL;
-    if (pInfo->prefetchedTuple == NULL) {
-      pTupleHandle = tsortNextTuple(pHandle);
-    } else {
-      pTupleHandle = pInfo->prefetchedTuple;
-    }
-
+    STupleHandle* pTupleHandle = tsortNextTuple(pHandle);
     if (pTupleHandle == NULL) {
       break;
     }
 
     appendOneRowToDataBlock(p, pTupleHandle);
-
     if (p->info.rows >= capacity) {
       break;
     }
   }
 
-
   qDebug("%s get sorted row blocks, rows:%d", GET_TASKID(pTaskInfo), p->info.rows);
   return (p->info.rows > 0) ? p : NULL;
 }
@@ -2261,7 +2253,6 @@ SOperatorInfo* createTableMergeScanOperatorInfo(STableScanPhysiNode* pTableScanN
                                                 SReadHandle* readHandle, SExecTaskInfo* pTaskInfo) {
   STableMergeScanInfo* pInfo = taosMemoryCalloc(1, sizeof(STableMergeScanInfo));
   SOperatorInfo*       pOperator = taosMemoryCalloc(1, sizeof(SOperatorInfo));
-
   if (pInfo == NULL || pOperator == NULL) {
     goto _error;
   }
@@ -2288,7 +2279,6 @@ SOperatorInfo* createTableMergeScanOperatorInfo(STableScanPhysiNode* pTableScanN
   pInfo->interval           = extractIntervalInfo(pTableScanNode);
   pInfo->sample.sampleRatio = pTableScanNode->ratio;
   pInfo->sample.seed        = taosGetTimestampSec();
-
   pInfo->dataBlockLoadFlag  = pTableScanNode->dataRequired;
   pInfo->pFilterNode        = pTableScanNode->scan.node.pConditions;
   pInfo->dataReaders        = dataReaders;
@@ -2307,10 +2297,12 @@ SOperatorInfo* createTableMergeScanOperatorInfo(STableScanPhysiNode* pTableScanN
     taosArrayPush(pInfo->sortSourceParams, param);
     taosMemoryFree(param);
   }
+
   pInfo->pSortInfo = generateSortByTsInfo(pInfo->cond.order);
   pInfo->pSortInputBlock = createOneDataBlock(pInfo->pResBlock, false);
+
   int32_t rowSize = pInfo->pResBlock->info.rowSize;
-  pInfo->bufPageSize = rowSize < 1024 ? 1024 : rowSize * 2;
+  pInfo->bufPageSize     = getProperSortPageSize(rowSize);
   pInfo->sortBufSize     = pInfo->bufPageSize * 16;
   pInfo->hasGroupId      = false;
   pInfo->prefetchedTuple = NULL;