diff --git a/source/libs/executor/inc/executorimpl.h b/source/libs/executor/inc/executorimpl.h
index 230ccf6ace..4c9ed78769 100644
--- a/source/libs/executor/inc/executorimpl.h
+++ b/source/libs/executor/inc/executorimpl.h
@@ -490,6 +490,7 @@ typedef struct SGroupbyOperatorInfo {
   SExprInfo*      pScalarExprInfo;
   int32_t         numOfScalarExpr;  // the number of scalar expression in group operator
   SqlFunctionCtx* pScalarFuncCtx;
+  int32_t*        rowCellInfoOffset;  // offset value for each row result cell info
 } SGroupbyOperatorInfo;
 
 typedef struct SDataGroupInfo {
diff --git a/source/libs/executor/src/executorimpl.c b/source/libs/executor/src/executorimpl.c
index 87ecdde3ab..cd129b54fb 100644
--- a/source/libs/executor/src/executorimpl.c
+++ b/source/libs/executor/src/executorimpl.c
@@ -1173,6 +1173,9 @@ void projectApplyFunctions(SExprInfo* pExpr, SSDataBlock* pResult, SSDataBlock*
   setPseudoOutputColInfo(pResult, pCtx, pPseudoList);
   pResult->info.groupId = pSrcBlock->info.groupId;
 
+  // if the source equals to the destination, it is to create a new column as the result of scalar function or some operators.
+  bool createNewColModel = (pResult == pSrcBlock);
+
   int32_t numOfRows = 0;
 
   for (int32_t k = 0; k < numOfOutput; ++k) {
@@ -1181,7 +1184,7 @@ void projectApplyFunctions(SExprInfo* pExpr, SSDataBlock* pResult, SSDataBlock*
 
     if (pExpr[k].pExpr->nodeType == QUERY_NODE_COLUMN) {  // it is a project query
       SColumnInfoData* pColInfoData = taosArrayGet(pResult->pDataBlock, outputSlotId);
-      if (pResult->info.rows > 0) {
+      if (pResult->info.rows > 0 && !createNewColModel) {
         colDataMergeCol(pColInfoData, pResult->info.rows, pfCtx->input.pData[0], pfCtx->input.numOfRows);
       } else {
         colDataAssign(pColInfoData, pfCtx->input.pData[0], pfCtx->input.numOfRows);
@@ -1191,7 +1194,7 @@ void projectApplyFunctions(SExprInfo* pExpr, SSDataBlock* pResult, SSDataBlock*
     } else if (pExpr[k].pExpr->nodeType == QUERY_NODE_VALUE) {
       SColumnInfoData* pColInfoData = taosArrayGet(pResult->pDataBlock, outputSlotId);
 
-      int32_t offset = pResult->info.rows;
+      int32_t offset = createNewColModel? 0: pResult->info.rows;
       for (int32_t i = 0; i < pSrcBlock->info.rows; ++i) {
         colDataAppend(pColInfoData, i + offset, taosVariantGet(&pExpr[k].base.pParam[0].param, pExpr[k].base.pParam[0].param.nType), TSDB_DATA_TYPE_NULL == pExpr[k].base.pParam[0].param.nType);
       }
@@ -1207,7 +1210,8 @@ void projectApplyFunctions(SExprInfo* pExpr, SSDataBlock* pResult, SSDataBlock*
       SScalarParam dest = {.columnData = &idata};
       scalarCalculate(pExpr[k].pExpr->_optrRoot.pRootNode, pBlockList, &dest);
 
-      colDataMergeCol(pResColData, pResult->info.rows, &idata, dest.numOfRows);
+      int32_t startOffset = createNewColModel? 0:pResult->info.rows;
+      colDataMergeCol(pResColData, startOffset, &idata, dest.numOfRows);
 
       numOfRows = dest.numOfRows;
       taosArrayDestroy(pBlockList);
@@ -1224,7 +1228,7 @@ void projectApplyFunctions(SExprInfo* pExpr, SSDataBlock* pResult, SSDataBlock*
         pfCtx->fpSet.init(&pCtx[k], pResInfo);
 
         pfCtx->pOutput = taosArrayGet(pResult->pDataBlock, outputSlotId);
-        pfCtx->offset  = pResult->info.rows;  // set the start offset
+        pfCtx->offset  = createNewColModel? 0:pResult->info.rows; // set the start offset
 
         // set the timestamp(_rowts) output buffer
         if (taosArrayGetSize(pPseudoList) > 0) {
@@ -1242,7 +1246,9 @@ void projectApplyFunctions(SExprInfo* pExpr, SSDataBlock* pResult, SSDataBlock*
 
         SScalarParam dest = {.columnData = &idata};
         scalarCalculate((SNode*)pExpr[k].pExpr->_function.pFunctNode, pBlockList, &dest);
-        colDataMergeCol(pResColData, pResult->info.rows, &idata, dest.numOfRows);
+
+        int32_t startOffset = createNewColModel? 0:pResult->info.rows;
+        colDataMergeCol(pResColData, startOffset, &idata, dest.numOfRows);
 
         numOfRows = dest.numOfRows;
         taosArrayDestroy(pBlockList);
@@ -1252,7 +1258,9 @@ void projectApplyFunctions(SExprInfo* pExpr, SSDataBlock* pResult, SSDataBlock*
     }
   }
 
-  pResult->info.rows += numOfRows;
+  if (!createNewColModel) {
+    pResult->info.rows += numOfRows;
+  }
 }
 
 void doTimeWindowInterpolation(SOperatorInfo* pOperator, SOptrBasicInfo* pInfo, SArray* pDataBlock, TSKEY prevTs,
diff --git a/source/libs/executor/src/groupoperator.c b/source/libs/executor/src/groupoperator.c
index 8018a8dd31..d610880e30 100644
--- a/source/libs/executor/src/groupoperator.c
+++ b/source/libs/executor/src/groupoperator.c
@@ -341,7 +341,7 @@ SOperatorInfo* createGroupOperatorInfo(SOperatorInfo* downstream, SExprInfo* pEx
 
   pInfo->pScalarExprInfo = pScalarExprInfo;
   pInfo->numOfScalarExpr = numOfScalarExpr;
-  pInfo->pScalarFuncCtx = createSqlFunctionCtx(pExprInfo, numOfCols, &pInfo->binfo.rowCellInfoOffset);
+  pInfo->pScalarFuncCtx  = createSqlFunctionCtx(pScalarExprInfo, numOfScalarExpr, &pInfo->rowCellInfoOffset);
 
   int32_t code = initGroupOptrInfo(&pInfo->pGroupColVals, &pInfo->groupKeyLen, &pInfo->keyBuf, pGroupColList);
   if (code != TSDB_CODE_SUCCESS) {
diff --git a/source/libs/function/src/builtinsimpl.c b/source/libs/function/src/builtinsimpl.c
index 7699219f52..3d796515a0 100644
--- a/source/libs/function/src/builtinsimpl.c
+++ b/source/libs/function/src/builtinsimpl.c
@@ -901,7 +901,7 @@ int32_t lastFunction(SqlFunctionCtx *pCtx) {
 
       char* data = colDataGetData(pInputCol, i);
       TSKEY cts = getRowPTs(pInput->pPTS, i);
-      if (pResInfo->numOfRes == 0 || *(TSKEY*)(buf + bytes) > cts) {
+      if (pResInfo->numOfRes == 0 || *(TSKEY*)(buf + bytes) < cts) {
         memcpy(buf, data, bytes);
         *(TSKEY*)(buf + bytes) = cts;
         //        DO_UPDATE_TAG_COLUMNS(pCtx, ts);
@@ -919,7 +919,7 @@ int32_t lastFunction(SqlFunctionCtx *pCtx) {
 
       char* data = colDataGetData(pInputCol, i);
       TSKEY cts = getRowPTs(pInput->pPTS, i);
-      if (pResInfo->numOfRes == 0 || *(TSKEY*)(buf + bytes) > cts) {
+      if (pResInfo->numOfRes == 0 || *(TSKEY*)(buf + bytes) < cts) {
         memcpy(buf, data, bytes);
         *(TSKEY*)(buf + bytes) = cts;
         pResInfo->numOfRes = 1;
diff --git a/source/libs/parser/src/parInsert.c b/source/libs/parser/src/parInsert.c
index 1e8b732b6a..da759bc15a 100644
--- a/source/libs/parser/src/parInsert.c
+++ b/source/libs/parser/src/parInsert.c
@@ -888,10 +888,7 @@ static int parseOneRow(SInsertParseContext* pCxt, STableDataBlocks* pDataBlocks,
 
     if (PRIMARYKEY_TIMESTAMP_COL_ID == pSchema->colId) {
       TSKEY tsKey = TD_ROW_KEY(row);
-      if (checkTimestamp(pDataBlocks, (const char*)&tsKey) != TSDB_CODE_SUCCESS) {
-        buildSyntaxErrMsg(&pCxt->msg, "client time/server time can not be mixed up", sToken.z);
-        return TSDB_CODE_TSC_INVALID_TIME_STAMP;
-      }
+      checkTimestamp(pDataBlocks, (const char*)&tsKey);
     }
   }