diff --git a/src/client/src/tscSQLParser.c b/src/client/src/tscSQLParser.c
index bb2b8f3c520880c3cbe97d975f44ff05ab40bd40..b9172f5c8c4785fef711ce25ddaa98c85c09ffbb 100644
--- a/src/client/src/tscSQLParser.c
+++ b/src/client/src/tscSQLParser.c
@@ -2872,7 +2872,7 @@ int32_t addExprAndResultField(SSqlCmd* pCmd, SQueryInfo* pQueryInfo, int32_t col
 
         const int32_t TS_COLUMN_INDEX = PRIMARYKEY_TIMESTAMP_COL_INDEX;
         SColumnList   ids = createColumnList(1, index.tableIndex, TS_COLUMN_INDEX);
-        insertResultField(pQueryInfo, TS_COLUMN_INDEX, &ids, TSDB_KEYSIZE, TSDB_DATA_TYPE_TIMESTAMP,
+        insertResultField(pQueryInfo, colIndex, &ids, TSDB_KEYSIZE, TSDB_DATA_TYPE_TIMESTAMP,
                           aAggs[TSDB_FUNC_TS].name, pExpr);
 
         colIndex += 1;  // the first column is ts
@@ -7052,7 +7052,8 @@ static int32_t checkUpdateTagPrjFunctions(SQueryInfo* pQueryInfo, char* msg) {
       continue;
     }
 
-    if(functionId == TSDB_FUNC_DERIVATIVE){     // to avoid ts function id was modufied below
+    if(functionId == TSDB_FUNC_DERIVATIVE || functionId == TSDB_FUNC_DIFF ||
+        functionId == TSDB_FUNC_TOP ||functionId == TSDB_FUNC_BOTTOM ){     // to avoid ts function id was modufied below
       tagTsColExists = false;
     }
 
diff --git a/src/query/inc/qAggMain.h b/src/query/inc/qAggMain.h
index d4116fbfb2daec9b47c4a891c3c886728e6ca515..4b2de758ac082f71929d366cd9999dfda8c2ed97 100644
--- a/src/query/inc/qAggMain.h
+++ b/src/query/inc/qAggMain.h
@@ -186,6 +186,7 @@ typedef struct SQLFunctionCtx {
   tVariant     param[4];      // input parameter, e.g., top(k, 20), the number of results for top query is kept in param
   int64_t     *ptsList;       // corresponding timestamp array list
   void        *ptsOutputBuf;  // corresponding output buffer for timestamp of each result, e.g., top/bottom*/
+  void        *ptsOriOutputBuf;
   SQLPreAggVal preAggVals;
   tVariant     tag;
 
diff --git a/src/query/src/qAggMain.c b/src/query/src/qAggMain.c
index c19628eb370a5db7d6e5940531b9954879e213ee..89e91cb856f4954d351ed3e5173e3a8824c5a1f1 100644
--- a/src/query/src/qAggMain.c
+++ b/src/query/src/qAggMain.c
@@ -2789,6 +2789,7 @@ static void deriv_function(SQLFunctionCtx *pCtx) {
   int32_t i = (pCtx->order == TSDB_ORDER_ASC) ? 0 : pCtx->size - 1;
 
   TSKEY *pTimestamp = pCtx->ptsOutputBuf;
+  TSKEY *pTimestampOri = pCtx->ptsOriOutputBuf;
   TSKEY *tsList = GET_TS_LIST(pCtx);
 
   double *pOutput = (double *)pCtx->pOutput;
@@ -2808,6 +2809,7 @@ static void deriv_function(SQLFunctionCtx *pCtx) {
           if (pDerivInfo->ignoreNegative && *pOutput < 0) {
           } else {
             *pTimestamp = tsList[i];
+            if (pTimestampOri) {*pTimestampOri = tsList[i]; pTimestampOri += 1;}
             pOutput    += 1;
             pTimestamp += 1;
             notNullElems++;
@@ -2835,6 +2837,7 @@ static void deriv_function(SQLFunctionCtx *pCtx) {
           if (pDerivInfo->ignoreNegative && *pOutput < 0) {
           } else {
             *pTimestamp = tsList[i];
+            if (pTimestampOri) {*pTimestampOri = tsList[i]; pTimestampOri += 1;}
             pOutput    += 1;
             pTimestamp += 1;
             notNullElems++;
@@ -2861,6 +2864,7 @@ static void deriv_function(SQLFunctionCtx *pCtx) {
           if (pDerivInfo->ignoreNegative && *pOutput < 0) {
           } else {
             *pTimestamp = tsList[i];
+            if (pTimestampOri) {*pTimestampOri = tsList[i]; pTimestampOri += 1;}
             pOutput    += 1;
             pTimestamp += 1;
             notNullElems++;
@@ -2888,6 +2892,7 @@ static void deriv_function(SQLFunctionCtx *pCtx) {
           if (pDerivInfo->ignoreNegative && *pOutput < 0) {
           } else {
             *pTimestamp = tsList[i];
+            if (pTimestampOri) {*pTimestampOri = tsList[i]; pTimestampOri += 1;}
             pOutput    += 1;
             pTimestamp += 1;
             notNullElems++;
@@ -2914,6 +2919,7 @@ static void deriv_function(SQLFunctionCtx *pCtx) {
           if (pDerivInfo->ignoreNegative && *pOutput < 0) {
           } else {
             *pTimestamp = tsList[i];
+            if (pTimestampOri) {*pTimestampOri = tsList[i]; pTimestampOri += 1;}
             pOutput    += 1;
             pTimestamp += 1;
             notNullElems++;
@@ -2940,6 +2946,7 @@ static void deriv_function(SQLFunctionCtx *pCtx) {
           if (pDerivInfo->ignoreNegative && *pOutput < 0) {
           } else {
             *pTimestamp = tsList[i];
+            if (pTimestampOri) {*pTimestampOri = tsList[i]; pTimestampOri += 1;}
 
             pOutput    += 1;
             pTimestamp += 1;
@@ -2982,6 +2989,7 @@ static void diff_function(SQLFunctionCtx *pCtx) {
   int32_t i = (pCtx->order == TSDB_ORDER_ASC) ? 0 : pCtx->size - 1;
 
   TSKEY* pTimestamp = pCtx->ptsOutputBuf;
+  TSKEY* pTimestampOri = pCtx->ptsOriOutputBuf;
   TSKEY* tsList = GET_TS_LIST(pCtx);
 
   switch (pCtx->inputType) {
@@ -2997,6 +3005,7 @@ static void diff_function(SQLFunctionCtx *pCtx) {
         if (pCtx->param[1].nType != INITIAL_VALUE_NOT_ASSIGNED) {  // initial value is not set yet
           *pOutput = (int32_t)(pData[i] - pCtx->param[1].i64);  // direct previous may be null
           *pTimestamp = (tsList != NULL)? tsList[i]:0;
+          if (pTimestampOri) {*pTimestampOri = *pTimestamp; pTimestampOri += 1;}
           pOutput    += 1;
           pTimestamp += 1;
         }
@@ -3019,6 +3028,7 @@ static void diff_function(SQLFunctionCtx *pCtx) {
         if (pCtx->param[1].nType != INITIAL_VALUE_NOT_ASSIGNED) {  // initial value is not set yet
           *pOutput = pData[i] - pCtx->param[1].i64;  // direct previous may be null
           *pTimestamp = (tsList != NULL)? tsList[i]:0;
+          if (pTimestampOri) {*pTimestampOri = *pTimestamp; pTimestampOri += 1;}
           pOutput    += 1;
           pTimestamp += 1;
         }
@@ -3041,6 +3051,7 @@ static void diff_function(SQLFunctionCtx *pCtx) {
         if (pCtx->param[1].nType != INITIAL_VALUE_NOT_ASSIGNED) {  // initial value is not set yet
           SET_DOUBLE_VAL(pOutput, pData[i] - pCtx->param[1].dKey);  // direct previous may be null
           *pTimestamp = (tsList != NULL)? tsList[i]:0;
+          if (pTimestampOri) {*pTimestampOri = *pTimestamp; pTimestampOri += 1;}
           pOutput    += 1;
           pTimestamp += 1;
         }
@@ -3063,6 +3074,7 @@ static void diff_function(SQLFunctionCtx *pCtx) {
         if (pCtx->param[1].nType != INITIAL_VALUE_NOT_ASSIGNED) {  // initial value is not set yet
           *pOutput = (float)(pData[i] - pCtx->param[1].dKey);  // direct previous may be null
           *pTimestamp = (tsList != NULL)? tsList[i]:0;
+          if (pTimestampOri) {*pTimestampOri = *pTimestamp; pTimestampOri += 1;}
           pOutput    += 1;
           pTimestamp += 1;
         }
@@ -3085,6 +3097,7 @@ static void diff_function(SQLFunctionCtx *pCtx) {
         if (pCtx->param[1].nType != INITIAL_VALUE_NOT_ASSIGNED) {  // initial value is not set yet
           *pOutput = (int16_t)(pData[i] - pCtx->param[1].i64);  // direct previous may be null
           *pTimestamp = (tsList != NULL)? tsList[i]:0;
+          if (pTimestampOri) {*pTimestampOri = *pTimestamp; pTimestampOri += 1;}
           pOutput    += 1;
           pTimestamp += 1;
         }
@@ -3108,6 +3121,7 @@ static void diff_function(SQLFunctionCtx *pCtx) {
         if (pCtx->param[1].nType != INITIAL_VALUE_NOT_ASSIGNED) {  // initial value is not set yet
           *pOutput = (int8_t)(pData[i] - pCtx->param[1].i64);  // direct previous may be null
           *pTimestamp = (tsList != NULL)? tsList[i]:0;
+          if (pTimestampOri) {*pTimestampOri = *pTimestamp; pTimestampOri += 1;}
           pOutput    += 1;
           pTimestamp += 1;
         }
diff --git a/src/query/src/qExecutor.c b/src/query/src/qExecutor.c
index af7408880a16388a7a107c2fceecdfc14d1b8d8d..4ce9a1d849845419fc688eacd3a454a08656f16f 100644
--- a/src/query/src/qExecutor.c
+++ b/src/query/src/qExecutor.c
@@ -3615,14 +3615,20 @@ void updateOutputBuf(SOptrBasicInfo* pBInfo, int32_t *bufCapacity, int32_t numOf
     }
   }
 
+  char *tsbuf = NULL;
   for (int32_t i = 0; i < pDataBlock->info.numOfCols; ++i) {
     SColumnInfoData *pColInfo = taosArrayGet(pDataBlock->pDataBlock, i);
     pBInfo->pCtx[i].pOutput = pColInfo->pData + pColInfo->info.bytes * pDataBlock->info.rows;
 
     // re-estabilish output buffer pointer.
     int32_t functionId = pBInfo->pCtx[i].functionId;
-    if (functionId == TSDB_FUNC_TOP || functionId == TSDB_FUNC_BOTTOM || functionId == TSDB_FUNC_DIFF || functionId == TSDB_FUNC_DERIVATIVE) {
-      if(i > 0) pBInfo->pCtx[i].ptsOutputBuf = pBInfo->pCtx[i-1].pOutput;
+    if (functionId == TSDB_FUNC_PRJ && pColInfo->info.type == TSDB_DATA_TYPE_TIMESTAMP){
+      tsbuf = pBInfo->pCtx[i].pOutput;
+    }
+    else if ((i > 0) &&
+             (functionId == TSDB_FUNC_TOP || functionId == TSDB_FUNC_BOTTOM || functionId == TSDB_FUNC_DIFF || functionId == TSDB_FUNC_DERIVATIVE)) {
+        pBInfo->pCtx[i].ptsOutputBuf = pBInfo->pCtx[i-1].pOutput;
+        pBInfo->pCtx[i].ptsOriOutputBuf = tsbuf;
     }
   }
 }