diff --git a/source/common/src/tdatablock.c b/source/common/src/tdatablock.c
index 772b1f69a329054cd255ff486d7504eb0be29fa6..caf82924f403582094e37ae9ffa80969433d84f4 100644
--- a/source/common/src/tdatablock.c
+++ b/source/common/src/tdatablock.c
@@ -131,44 +131,7 @@ int32_t colDataAppend(SColumnInfoData* pColumnInfoData, uint32_t currentRow, con
     memcpy(pColumnInfoData->pData + len, pData, varDataTLen(pData));
     pColumnInfoData->varmeta.length += varDataTLen(pData);
   } else {
-    char* p = pColumnInfoData->pData + pColumnInfoData->info.bytes * currentRow;
-    switch (type) {
-      case TSDB_DATA_TYPE_BOOL: {
-        *(bool*)p = *(bool*)pData;
-        break;
-      }
-      case TSDB_DATA_TYPE_TINYINT:
-      case TSDB_DATA_TYPE_UTINYINT: {
-        *(int8_t*)p = *(int8_t*)pData;
-        break;
-      }
-      case TSDB_DATA_TYPE_SMALLINT:
-      case TSDB_DATA_TYPE_USMALLINT: {
-        *(int16_t*)p = *(int16_t*)pData;
-        break;
-      }
-      case TSDB_DATA_TYPE_INT:
-      case TSDB_DATA_TYPE_UINT: {
-        *(int32_t*)p = *(int32_t*)pData;
-        break;
-      }
-      case TSDB_DATA_TYPE_TIMESTAMP:
-      case TSDB_DATA_TYPE_BIGINT:
-      case TSDB_DATA_TYPE_UBIGINT: {
-        *(int64_t*)p = *(int64_t*)pData;
-        break;
-      }
-      case TSDB_DATA_TYPE_FLOAT: {
-        *(float*)p = *(float*)pData;
-        break;
-      }
-      case TSDB_DATA_TYPE_DOUBLE: {
-        *(double*)p = *(double*)pData;
-        break;
-      }
-      default:
-        assert(0);
-    }
+    memcpy(pColumnInfoData->pData + pColumnInfoData->info.bytes * currentRow, pData, pColumnInfoData->info.bytes);
   }
 
   return 0;
@@ -562,6 +525,11 @@ int32_t blockDataFromBuf(SSDataBlock* pBlock, const char* buf) {
 
     size_t metaSize = pBlock->info.rows * sizeof(int32_t);
     if (IS_VAR_DATA_TYPE(pCol->info.type)) {
+      char* tmp = taosMemoryRealloc(pCol->varmeta.offset, metaSize);
+      if (tmp == NULL) {
+        return TSDB_CODE_OUT_OF_MEMORY;
+      }
+      pCol->varmeta.offset = (int32_t*)tmp;
       memcpy(pCol->varmeta.offset, pStart, metaSize);
       pStart += metaSize;
     } else {
@@ -738,61 +706,12 @@ static int32_t blockDataAssign(SColumnInfoData* pCols, const SSDataBlock* pDataB
         pDst->varmeta.offset[j] = pSrc->varmeta.offset[index[j]];
       }
     } else {
-      switch (pSrc->info.type) {
-        case TSDB_DATA_TYPE_UINT:
-        case TSDB_DATA_TYPE_INT: {
-          for (int32_t j = 0; j < pDataBlock->info.rows; ++j) {
-            int32_t* p = (int32_t*)pDst->pData;
-            int32_t* srclist = (int32_t*)pSrc->pData;
-
-            p[j] = srclist[index[j]];
-            if (colDataIsNull_f(pSrc->nullbitmap, index[j])) {
-              colDataSetNull_f(pDst->nullbitmap, j);
-            }
-          }
-          break;
-        }
-        case TSDB_DATA_TYPE_UTINYINT:
-        case TSDB_DATA_TYPE_TINYINT: {
-          for (int32_t j = 0; j < pDataBlock->info.rows; ++j) {
-            int32_t* p = (int32_t*)pDst->pData;
-            int32_t* srclist = (int32_t*)pSrc->pData;
-
-            p[j] = srclist[index[j]];
-            if (colDataIsNull_f(pSrc->nullbitmap, index[j])) {
-              colDataSetNull_f(pDst->nullbitmap, j);
-            }
-          }
-          break;
-        }
-        case TSDB_DATA_TYPE_USMALLINT:
-        case TSDB_DATA_TYPE_SMALLINT: {
-          for (int32_t j = 0; j < pDataBlock->info.rows; ++j) {
-            int32_t* p = (int32_t*)pDst->pData;
-            int32_t* srclist = (int32_t*)pSrc->pData;
-
-            p[j] = srclist[index[j]];
-            if (colDataIsNull_f(pSrc->nullbitmap, index[j])) {
-              colDataSetNull_f(pDst->nullbitmap, j);
-            }
-          }
-          break;
-        }
-        case TSDB_DATA_TYPE_UBIGINT:
-        case TSDB_DATA_TYPE_BIGINT: {
-          for (int32_t j = 0; j < pDataBlock->info.rows; ++j) {
-            int32_t* p = (int32_t*)pDst->pData;
-            int32_t* srclist = (int32_t*)pSrc->pData;
-
-            p[j] = srclist[index[j]];
-            if (colDataIsNull_f(pSrc->nullbitmap, index[j])) {
-              colDataSetNull_f(pDst->nullbitmap, j);
-            }
-          }
-          break;
+      for (int32_t j = 0; j < pDataBlock->info.rows; ++j) {
+        if (colDataIsNull_f(pSrc->nullbitmap, index[j])) {
+          colDataSetNull_f(pDst->nullbitmap, j);
+          continue;
         }
-        default:
-          assert(0);
+        memcpy(pDst->pData + j * pDst->info.bytes, pSrc->pData + index[j] * pDst->info.bytes, pDst->info.bytes);
       }
     }
   }
@@ -938,12 +857,7 @@ int32_t blockDataSort(SSDataBlock* pDataBlock, SArray* pOrderInfo) {
 
   int64_t p2 = taosGetTimestampUs();
 
-  int32_t code = blockDataAssign(pCols, pDataBlock, index);
-  if (code != TSDB_CODE_SUCCESS) {
-    destroyTupleIndex(index);
-    terrno = code;
-    return code;
-  }
+  blockDataAssign(pCols, pDataBlock, index);
 
   int64_t p3 = taosGetTimestampUs();
 
diff --git a/source/libs/executor/src/executorimpl.c b/source/libs/executor/src/executorimpl.c
index 2ccc92111ae9d402177aa092c2c7811fccbe61f7..f960993e3e9714074196d7ed359717ca93da7dac 100644
--- a/source/libs/executor/src/executorimpl.c
+++ b/source/libs/executor/src/executorimpl.c
@@ -5769,10 +5769,11 @@ static void appendOneRowToDataBlock(SSDataBlock* pBlock, STupleHandle* pTupleHan
   pBlock->info.rows += 1;
 }
 
-static SSDataBlock* getSortedBlockData(SSortHandle* pHandle, SSDataBlock* pDataBlock, bool hasVarCol,
-                                       int32_t capacity) {
+static SSDataBlock* getSortedBlockData(SSortHandle* pHandle, SSDataBlock* pDataBlock, int32_t capacity) {
   blockDataCleanup(pDataBlock);
 
+  blockDataEnsureCapacity(pDataBlock, capacity);
+
   while (1) {
     STupleHandle* pTupleHandle = tsortNextTuple(pHandle);
     if (pTupleHandle == NULL) {
@@ -5971,7 +5972,7 @@ static SSDataBlock* doSortedMerge(SOperatorInfo* pOperator, bool* newgroup) {
   SExecTaskInfo*            pTaskInfo = pOperator->pTaskInfo;
   SSortedMergeOperatorInfo* pInfo = pOperator->info;
   if (pOperator->status == OP_RES_TO_RETURN) {
-    return getSortedBlockData(pInfo->pSortHandle, pInfo->binfo.pRes, pInfo->hasVarCol, pInfo->binfo.capacity);
+    return getSortedBlockData(pInfo->pSortHandle, pInfo->binfo.pRes, pInfo->binfo.capacity);
   }
 
   int32_t numOfBufPage = pInfo->sortBufSize / pInfo->bufPageSize;
@@ -6116,10 +6117,9 @@ static SSDataBlock* doSort(SOperatorInfo* pOperator, bool* newgroup) {
 
   SExecTaskInfo*     pTaskInfo = pOperator->pTaskInfo;
   SSortOperatorInfo* pInfo = pOperator->info;
-  bool               hasVarCol = pInfo->pDataBlock->info.hasVarCol;
 
   if (pOperator->status == OP_RES_TO_RETURN) {
-    return getSortedBlockData(pInfo->pSortHandle, pInfo->pDataBlock, hasVarCol, pInfo->numOfRowsInRes);
+    return getSortedBlockData(pInfo->pSortHandle, pInfo->pDataBlock, pInfo->numOfRowsInRes);
   }
 
   int32_t numOfBufPage = pInfo->sortBufSize / pInfo->bufPageSize;
@@ -6139,7 +6139,7 @@ static SSDataBlock* doSort(SOperatorInfo* pOperator, bool* newgroup) {
   }
 
   pOperator->status = OP_RES_TO_RETURN;
-  return getSortedBlockData(pInfo->pSortHandle, pInfo->pDataBlock, hasVarCol, pInfo->numOfRowsInRes);
+  return getSortedBlockData(pInfo->pSortHandle, pInfo->pDataBlock, pInfo->numOfRowsInRes);
 }
 
 SOperatorInfo* createSortOperatorInfo(SOperatorInfo* downstream, SSDataBlock* pResBlock, SArray* pSortInfo,
diff --git a/source/libs/executor/src/tsort.c b/source/libs/executor/src/tsort.c
index 511cba972c61db91f0e3af2d3b257505e7ab1ef5..49a99ec284927ac89e8e845ace17282c689df5b2 100644
--- a/source/libs/executor/src/tsort.c
+++ b/source/libs/executor/src/tsort.c
@@ -111,6 +111,17 @@ SSortHandle* tsortCreateSortHandle(SArray* pSortInfo, int32_t type, int32_t page
   return pSortHandle;
 }
 
+static int32_t sortComparClearup(SMsortComparParam* cmpParam) {
+  for(int32_t i = 0; i < cmpParam->numOfSources; ++i) {
+    SExternalMemSource* pSource = cmpParam->pSources[i];
+    blockDataDestroy(pSource->src.pBlock);
+    taosMemoryFreeClear(pSource);
+  }
+
+  cmpParam->numOfSources = 0;
+  return TSDB_CODE_SUCCESS;
+}
+
 void tsortDestroySortHandle(SSortHandle* pSortHandle) {
   tsortClose(pSortHandle);
   if (pSortHandle->pMergeTree != NULL) {
@@ -119,6 +130,8 @@ void tsortDestroySortHandle(SSortHandle* pSortHandle) {
 
   destroyDiskbasedBuf(pSortHandle->pBuf);
   taosMemoryFreeClear(pSortHandle->idStr);
+  blockDataDestroy(pSortHandle->pDataBlock);
+  sortComparClearup(&pSortHandle->cmpParam);    // pOrderedSource is in cmpParam
   taosMemoryFreeClear(pSortHandle);
 }
 
@@ -168,6 +181,7 @@ static int32_t doAddToBuf(SSDataBlock* pDataBlock, SSortHandle* pHandle) {
     int32_t pageId = -1;
     void* pPage = getNewBufPage(pHandle->pBuf, pHandle->sourceId, &pageId);
     if (pPage == NULL) {
+      blockDataDestroy(p);
       return terrno;
     }
 
@@ -227,17 +241,6 @@ static int32_t sortComparInit(SMsortComparParam* cmpParam, SArray* pSources, int
   return code;
 }
 
-static int32_t sortComparClearup(SMsortComparParam* cmpParam) {
-  for(int32_t i = 0; i < cmpParam->numOfSources; ++i) {
-    SExternalMemSource* pSource = cmpParam->pSources[i];
-    blockDataDestroy(pSource->src.pBlock);
-    taosMemoryFreeClear(pSource);
-  }
-
-  cmpParam->numOfSources = 0;
-  return TSDB_CODE_SUCCESS;
-}
-
 static void appendOneRowToDataBlock(SSDataBlock *pBlock, const SSDataBlock* pSource, int32_t* rowIndex) {
   for (int32_t i = 0; i < pBlock->info.numOfCols; ++i) {
     SColumnInfoData* pColInfo = taosArrayGet(pBlock->pDataBlock, i);
@@ -312,7 +315,7 @@ static int32_t adjustMergeTreeForNextTuple(SExternalMemSource *pSource, SMultiwa
   return TSDB_CODE_SUCCESS;
 }
 
-static SSDataBlock* getSortedBlockData(SSortHandle* pHandle, SMsortComparParam* cmpParam, int32_t capacity) {
+static SSDataBlock* getSortedBlockDataInner(SSortHandle* pHandle, SMsortComparParam* cmpParam, int32_t capacity) {
   blockDataCleanup(pHandle->pDataBlock);
 
   while(1) {
@@ -454,7 +457,7 @@ static int32_t doInternalMergeSort(SSortHandle* pHandle) {
       }
 
       while (1) {
-        SSDataBlock* pDataBlock = getSortedBlockData(pHandle, &pHandle->cmpParam, numOfRows);
+        SSDataBlock* pDataBlock = getSortedBlockDataInner(pHandle, &pHandle->cmpParam, numOfRows);
         if (pDataBlock == NULL) {
           break;
         }
diff --git a/source/libs/executor/test/sortTests.cpp b/source/libs/executor/test/sortTests.cpp
index 7e2fd0fed29474d598fdfd7da5f5f6d503ac9fec..0674f05f332aed7f05e78c11bff3f3e730bd2b41 100644
--- a/source/libs/executor/test/sortTests.cpp
+++ b/source/libs/executor/test/sortTests.cpp
@@ -198,6 +198,7 @@ TEST(testCase, inMem_sort_Test) {
 
   int32_t code = tsortOpen(phandle);
   int32_t row = 1;
+  taosMemoryFreeClear(ps);
 
   while(1) {
     STupleHandle* pTupleHandle = tsortNextTuple(phandle);
@@ -235,6 +236,7 @@ TEST(testCase, external_mem_sort_Test) {
 
   int32_t code = tsortOpen(phandle);
   int32_t row = 1;
+  taosMemoryFreeClear(ps);
 
   while(1) {
     STupleHandle* pTupleHandle = tsortNextTuple(phandle);
@@ -245,8 +247,8 @@ TEST(testCase, external_mem_sort_Test) {
     void* v = tsortGetValue(pTupleHandle, 0);
     printf("%d: %d\n", row, *(int32_t*) v);
     ASSERT_EQ(row++, *(int32_t*) v);
-    //char        buf[64] = {0};
-    //snprintf(buf, varDataLen(v), "%s", varDataVal(v));
+    char        buf[64] = {0};
+    memcpy(buf, varDataVal(v), varDataLen(v));
     //printf("%d: %s\n", row, buf);
   }
   tsortDestroySortHandle(phandle);