diff --git a/source/libs/executor/src/scanoperator.c b/source/libs/executor/src/scanoperator.c
index 66301fa10b..7e1ff3d6d7 100644
--- a/source/libs/executor/src/scanoperator.c
+++ b/source/libs/executor/src/scanoperator.c
@@ -4725,9 +4725,8 @@ int32_t startGroupTableMergeScan(SOperatorInfo* pOperator) {
 
   STableListInfo* tableListInfo = pInfo->tableListInfo;
 
-  pInfo->dataReaders = taosArrayInit(64, POINTER_BYTES);
+  // pInfo->dataReaders = taosArrayInit(64, POINTER_BYTES);
   pInfo->pReader = NULL;
-
   // todo the total available buffer should be determined by total capacity of buffer of this task.
   // the additional one is reserved for merge result
   pInfo->sortBufSize = pInfo->bufPageSize * (tableEndIdx - tableStartIdx + 1 + 1);
@@ -4775,7 +4774,7 @@ int32_t stopGroupTableMergeScan(SOperatorInfo* pOperator) {
   STableMergeScanInfo* pInfo = pOperator->info;
   SExecTaskInfo*       pTaskInfo = pOperator->pTaskInfo;
 
-  size_t numReaders = taosArrayGetSize(pInfo->dataReaders);
+  int32_t numOfTable = taosArrayGetSize(pInfo->queryConds);
 
   SSortExecInfo sortExecInfo = tsortGetSortExecInfo(pInfo->pSortHandle);
   pInfo->sortExecInfo.sortMethod = sortExecInfo.sortMethod;
@@ -4784,7 +4783,7 @@ int32_t stopGroupTableMergeScan(SOperatorInfo* pOperator) {
   pInfo->sortExecInfo.readBytes += sortExecInfo.readBytes;
   pInfo->sortExecInfo.writeBytes += sortExecInfo.writeBytes;
 
-  for (int32_t i = 0; i < numReaders; ++i) {
+  for (int32_t i = 0; i < numOfTable; ++i) {
     STableMergeScanSortSourceParam* param = taosArrayGet(pInfo->sortSourceParams, i);
     blockDataDestroy(param->inputBlock);
   }
@@ -4792,10 +4791,6 @@ int32_t stopGroupTableMergeScan(SOperatorInfo* pOperator) {
 
   tsortDestroySortHandle(pInfo->pSortHandle);
 
-  for (int32_t i = 0; i < numReaders; ++i) {
-    STsdbReader* reader = taosArrayGetP(pInfo->dataReaders, i);
-    tsdbReaderClose(reader);
-  }
   for (int32_t i = 0; i < taosArrayGetSize(pInfo->queryConds); i++) {
     SQueryTableDataCond* cond = taosArrayGet(pInfo->queryConds, i);
     taosMemoryFree(cond->colList);
@@ -4803,8 +4798,6 @@ int32_t stopGroupTableMergeScan(SOperatorInfo* pOperator) {
   taosArrayDestroy(pInfo->queryConds);
   pInfo->queryConds = NULL;
 
-  taosArrayDestroy(pInfo->dataReaders);
-  pInfo->dataReaders = NULL;
   return TSDB_CODE_SUCCESS;
 }
 
@@ -4888,15 +4881,17 @@ SSDataBlock* doTableMergeScan(SOperatorInfo* pOperator) {
 void destroyTableMergeScanOperatorInfo(void* param) {
   STableMergeScanInfo* pTableScanInfo = (STableMergeScanInfo*)param;
   cleanupQueryTableDataCond(&pTableScanInfo->cond);
+
+  int32_t numOfTable = taosArrayGetSize(pTableScanInfo->queryConds);
+
+  for (int32_t i = 0; i < numOfTable; i++) {
+    STableMergeScanSortSourceParam* param = taosArrayGet(pTableScanInfo->sortSourceParams, i);
+    blockDataDestroy(param->inputBlock);
+  }
   taosArrayDestroy(pTableScanInfo->sortSourceParams);
 
-  for (int32_t i = 0; i < taosArrayGetSize(pTableScanInfo->dataReaders); ++i) {
-    STsdbReader* reader = taosArrayGetP(pTableScanInfo->dataReaders, i);
-    tsdbReaderClose(reader);
-  }
-  taosArrayDestroy(pTableScanInfo->dataReaders);
-
   tsdbReaderClose(pTableScanInfo->pReader);
+  pTableScanInfo->pReader = NULL;
 
   for (int i = 0; i < taosArrayGetSize(pTableScanInfo->queryConds); i++) {
     SQueryTableDataCond* pCond = taosArrayGet(pTableScanInfo->queryConds, i);