diff --git a/source/libs/parser/src/parInsertData.c b/source/libs/parser/src/parInsertData.c
index fa5a3f4cd0f63b6cddaf2700edfb9d2c0db4fc4b..3b1de7e20d303d7d13d31459fcab0cde071ef1b1 100644
--- a/source/libs/parser/src/parInsertData.c
+++ b/source/libs/parser/src/parInsertData.c
@@ -12,7 +12,7 @@
  * You should have received a copy of the GNU Affero General Public License
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
-// clang-format on
+// clang-format off
 #include "parInsertData.h"
 
 #include "catalog.h"
@@ -37,14 +37,14 @@ typedef struct SBlockKeyInfo {
 
 typedef struct {
   int32_t   index;
-  SArray*   rowArray;  // array of merged rows(mem allocated by tRealloc)
+  SArray*   rowArray;  // array of merged rows(mem allocated by tRealloc/free by tFree)
   STSchema* pSchema;
+  int64_t   tbUid;  // suid for child table, uid for normal table
 } SBlockRowMerger;
 
-static void tdResetSBlockRowMerger(SBlockRowMerger* pMerger) {
+static FORCE_INLINE void tdResetSBlockRowMerger(SBlockRowMerger* pMerger) {
   if (pMerger) {
     pMerger->index = -1;
-    taosMemoryFreeClear(pMerger->pSchema);
   }
 }
 
@@ -57,6 +57,7 @@ static void tdFreeSBlockRowMerger(SBlockRowMerger* pMerger) {
     taosArrayDestroy(pMerger->rowArray);
 
     taosMemoryFreeClear(pMerger->pSchema);
+    taosMemoryFree(pMerger);
   }
 }
 
@@ -430,15 +431,15 @@ static void* tdGetCurRowFromBlockMerger(SBlockRowMerger* pBlkRowMerger) {
   return NULL;
 }
 
-static int32_t tdBlockRowMerge(STableDataBlocks* dataBuf, SBlockKeyTuple* pEndKeyTp, int32_t nDupRows,
+static int32_t tdBlockRowMerge(STableMeta* pTableMeta, SBlockKeyTuple* pEndKeyTp, int32_t nDupRows,
                                SBlockRowMerger** pBlkRowMerger, int32_t rowSize) {
   ASSERT(nDupRows > 1);
   SBlockKeyTuple* pStartKeyTp = pEndKeyTp - (nDupRows - 1);
   ASSERT(pStartKeyTp->skey == pEndKeyTp->skey);
 
-  STSRow* pEndRow = (STSRow*)pEndKeyTp->payloadAddr;
   // TODO: optimization if end row is all normal
 #if 0
+  STSRow* pEndRow = (STSRow*)pEndKeyTp->payloadAddr;
   if(isNormal(pEndRow)) { // set the end row if it is normal and return directly
     pStartKeyTp->payloadAddr = pEndKeyTp->payloadAddr;
     return TSDB_CODE_SUCCESS;
@@ -461,14 +462,25 @@ static int32_t tdBlockRowMerge(STableDataBlocks* dataBuf, SBlockKeyTuple* pEndKe
     }
   }
 
+  if ((*pBlkRowMerger)->pSchema) {
+    if ((*pBlkRowMerger)->pSchema->version != pTableMeta->sversion) {
+      taosMemoryFreeClear((*pBlkRowMerger)->pSchema);
+    } else {
+      if ((*pBlkRowMerger)->tbUid != (pTableMeta->suid > 0 ? pTableMeta->suid : pTableMeta->uid)) {
+        taosMemoryFreeClear((*pBlkRowMerger)->pSchema);
+      }
+    }
+  }
+
   if (!(*pBlkRowMerger)->pSchema) {
-    (*pBlkRowMerger)->pSchema = tdGetSTSChemaFromSSChema(
-        dataBuf->pTableMeta->schema, dataBuf->pTableMeta->tableInfo.numOfColumns, dataBuf->pTableMeta->sversion);
+    (*pBlkRowMerger)->pSchema =
+        tdGetSTSChemaFromSSChema(pTableMeta->schema, pTableMeta->tableInfo.numOfColumns, pTableMeta->sversion);
 
     if (!(*pBlkRowMerger)->pSchema) {
       terrno = TSDB_CODE_OUT_OF_MEMORY;
       return TSDB_CODE_FAILED;
     }
+    (*pBlkRowMerger)->tbUid = pTableMeta->suid > 0 ? pTableMeta->suid : pTableMeta->uid;
   }
 
   void* pDestRow = NULL;
@@ -491,7 +503,7 @@ static int32_t tdBlockRowMerge(STableDataBlocks* dataBuf, SBlockKeyTuple* pEndKe
   SArray*   pArray = taosArrayInit(pSchema->numOfCols, sizeof(SColVal));
   for (int32_t i = 0; i < pSchema->numOfCols; ++i) {
     SColVal colVal = {0};
-    for (int32_t j = 0; j < nDupRows; ++i) {
+    for (int32_t j = 0; j < nDupRows; ++j) {
       tTSRowGetVal((pEndKeyTp - j)->payloadAddr, pSchema, i, &colVal);
       if (!colVal.isNone) {
         break;
@@ -512,6 +524,7 @@ static int32_t tdBlockRowMerge(STableDataBlocks* dataBuf, SBlockKeyTuple* pEndKe
 static int sortMergeDataBlockDupRows(STableDataBlocks* dataBuf, SBlockKeyInfo* pBlkKeyInfo,
                                      SBlockRowMerger** ppBlkRowMerger) {
   SSubmitBlk* pBlocks = (SSubmitBlk*)dataBuf->pData;
+  STableMeta* pTableMeta = dataBuf->pTableMeta;
   int16_t     nRows = pBlocks->numOfRows;
 
   // size is less than the total size, since duplicated rows may be removed.
@@ -566,11 +579,13 @@ static int sortMergeDataBlockDupRows(STableDataBlocks* dataBuf, SBlockKeyInfo* p
       }
 
       if ((j - i) > 1) {
-        if (tdBlockRowMerge(dataBuf, (pBlkKeyTuple + j - 1), j - i, ppBlkRowMerger, extendedRowSize) < 0) {
+        if (tdBlockRowMerge(pTableMeta, (pBlkKeyTuple + j - 1), j - i, ppBlkRowMerger, extendedRowSize) < 0) {
           return TSDB_CODE_FAILED;
         }
         (pBlkKeyTuple + nextPos)->payloadAddr = tdGetCurRowFromBlockMerger(*ppBlkRowMerger);
-        hasDup = true;
+        if (!hasDup) {
+          hasDup = true;
+        }
         i = j;
       } else {
         if (hasDup) {
@@ -585,7 +600,7 @@ static int sortMergeDataBlockDupRows(STableDataBlocks* dataBuf, SBlockKeyInfo* p
 
     if ((j - i) > 1) {
       ASSERT((pBlkKeyTuple + i)->skey == (pBlkKeyTuple + j - 1)->skey);
-      if (tdBlockRowMerge(dataBuf, (pBlkKeyTuple + j - 1), j - i, ppBlkRowMerger, extendedRowSize) < 0) {
+      if (tdBlockRowMerge(pTableMeta, (pBlkKeyTuple + j - 1), j - i, ppBlkRowMerger, extendedRowSize) < 0) {
         return TSDB_CODE_FAILED;
       }
       (pBlkKeyTuple + nextPos)->payloadAddr = tdGetCurRowFromBlockMerger(*ppBlkRowMerger);
@@ -594,7 +609,7 @@ static int sortMergeDataBlockDupRows(STableDataBlocks* dataBuf, SBlockKeyInfo* p
     }
 
     dataBuf->ordered = true;
-    pBlocks->numOfRows = i + 1;
+    pBlocks->numOfRows = nextPos + 1;
   }
 
   dataBuf->size = sizeof(SSubmitBlk) + pBlocks->numOfRows * extendedRowSize;