diff --git a/src/client/src/tscAsync.c b/src/client/src/tscAsync.c
index dfdf97ea432f276de0f73a102f87bb6fc42e4e3e..910a7b41126536eb0e7838e8aaf196b64642e5f4 100644
--- a/src/client/src/tscAsync.c
+++ b/src/client/src/tscAsync.c
@@ -365,6 +365,7 @@ void tscProcessFetchRow(SSchedMsg *pMsg) {
 static void tscProcessAsyncError(SSchedMsg *pMsg) {
   void (*fp)() = pMsg->ahandle;
   terrno = *(int32_t*) pMsg->msg;
+  tfree(pMsg->msg);
   (*fp)(pMsg->thandle, NULL, *(int32_t*)pMsg->msg);
 }
 
@@ -447,9 +448,6 @@ void tscTableMetaCallBack(void *param, TAOS_RES *res, int code) {
 
         assert(pCmd->command != TSDB_SQL_INSERT);
 
-        // in case of insert, redo parsing the sql string and build new submit data block for two reasons:
-        // 1. the table Id(tid & uid) may have been update, the submit block needs to be updated accordingly.
-        // 2. vnode may need the schema information along with submit block to update its local table schema.
         if (pCmd->command == TSDB_SQL_SELECT) {
           tscDebug("%p redo parse sql string and proceed", pSql);
           pCmd->parseFinished = false;
@@ -463,8 +461,7 @@ void tscTableMetaCallBack(void *param, TAOS_RES *res, int code) {
           }
 
           tscProcessSql(pSql);
-
-        }else {  // in all other cases, simple retry
+        } else {  // in all other cases, simple retry
           tscProcessSql(pSql);
         }
 
diff --git a/src/client/src/tscFunctionImpl.c b/src/client/src/tscFunctionImpl.c
index 66b9eed21174de02df9afc8ff0aa7e681bc36929..a422856fed8716e00a7905f73246eb8496170852 100644
--- a/src/client/src/tscFunctionImpl.c
+++ b/src/client/src/tscFunctionImpl.c
@@ -3993,13 +3993,12 @@ void twa_function_finalizer(SQLFunctionCtx *pCtx) {
   SResultRowCellInfo *pResInfo = GET_RES_INFO(pCtx);
   
   STwaInfo *pInfo = (STwaInfo *)GET_ROWCELL_INTERBUF(pResInfo);
-  assert(pInfo->win.ekey == pInfo->lastKey && pInfo->hasResult == pResInfo->hasResult);
-  
   if (pInfo->hasResult != DATA_SET_FLAG) {
     setNull(pCtx->aOutputBuf, TSDB_DATA_TYPE_DOUBLE, sizeof(double));
     return;
   }
-  
+
+  assert(pInfo->win.ekey == pInfo->lastKey && pInfo->hasResult == pResInfo->hasResult);
   if (pInfo->win.ekey == pInfo->win.skey) {
     *(double *)pCtx->aOutputBuf = pInfo->lastValue;
   } else {
diff --git a/src/client/src/tscSubquery.c b/src/client/src/tscSubquery.c
index 973f21c92b50570a69a4cab2b096877006e3d4e4..d2eb16795f88356633dc96768379fe058426ef12 100644
--- a/src/client/src/tscSubquery.c
+++ b/src/client/src/tscSubquery.c
@@ -2172,6 +2172,15 @@ static bool needRetryInsert(SSqlObj* pParentObj, int32_t numOfSub) {
   return true;
 }
 
+static void doFreeInsertSupporter(SSqlObj* pSqlObj) {
+  assert(pSqlObj != NULL && pSqlObj->subState.numOfSub > 0);
+
+  for(int32_t i = 0; i < pSqlObj->subState.numOfSub; ++i) {
+    SSqlObj* pSql = pSqlObj->pSubs[i];
+    tfree(pSql->param);
+  }
+}
+
 static void multiVnodeInsertFinalize(void* param, TAOS_RES* tres, int numOfRows) {
   SInsertSupporter *pSupporter = (SInsertSupporter *)param;
   SSqlObj* pParentObj = pSupporter->pSql;
@@ -2203,10 +2212,7 @@ static void multiVnodeInsertFinalize(void* param, TAOS_RES* tres, int numOfRows)
 
   if (pParentObj->res.code == TSDB_CODE_SUCCESS) {
     tscDebug("%p Async insertion completed, total inserted:%d", pParentObj, pParentObj->res.numOfRows);
-    for(int32_t i = 0; i < numOfSub; ++i) {
-      SSqlObj* pSql = pParentObj->pSubs[i];
-      tfree(pSql->param);
-    }
+    doFreeInsertSupporter(pParentObj);
 
     // todo remove this parameter in async callback function definition.
     // all data has been sent to vnode, call user function
@@ -2214,6 +2220,7 @@ static void multiVnodeInsertFinalize(void* param, TAOS_RES* tres, int numOfRows)
     (*pParentObj->fp)(pParentObj->param, pParentObj, v);
   } else {
     if (!needRetryInsert(pParentObj, numOfSub)) {
+      doFreeInsertSupporter(pParentObj);
       tscQueueAsyncRes(pParentObj);
       return;
     }
@@ -2244,16 +2251,19 @@ static void multiVnodeInsertFinalize(void* param, TAOS_RES* tres, int numOfRows)
 
     pParentObj->cmd.parseFinished = false;
     pParentObj->subState.numOfRemain = numOfFailed;
-    pParentObj->subState.numOfSub = numOfFailed;
 
     tscResetSqlCmdObj(&pParentObj->cmd, false);
 
+    // in case of insert, redo parsing the sql string and build new submit data block for two reasons:
+    // 1. the table Id(tid & uid) may have been update, the submit block needs to be updated accordingly.
+    // 2. vnode may need the schema information along with submit block to update its local table schema.
     tscDebug("%p re-parse sql to generate submit data, retry:%d", pParentObj, pParentObj->retry++);
     int32_t code = tsParseSql(pParentObj, true);
     if (code == TSDB_CODE_TSC_ACTION_IN_PROGRESS) return;
 
     if (code != TSDB_CODE_SUCCESS) {
       pParentObj->res.code = code;
+      doFreeInsertSupporter(pParentObj);
       tscQueueAsyncRes(pParentObj);
       return;
     }
diff --git a/src/query/src/qExecutor.c b/src/query/src/qExecutor.c
index 92de3fb84a30ffc194ee6880f22c969b91bc40eb..e83cafa0ac526b88546f7a29a144e3cdc86cbe50 100644
--- a/src/query/src/qExecutor.c
+++ b/src/query/src/qExecutor.c
@@ -703,65 +703,60 @@ static FORCE_INLINE int32_t getForwardStepsInBlock(int32_t numOfRows, __block_se
   return forwardStep;
 }
 
+static int32_t updateResultRowCurrentIndex(SResultRowInfo* pWindowResInfo, TSKEY lastKey, bool ascQuery) {
+  int32_t i = 0;
+  int64_t skey = TSKEY_INITIAL_VAL;
+
+  int32_t numOfClosed = 0;
+  for (i = 0; i < pWindowResInfo->size; ++i) {
+    SResultRow *pResult = pWindowResInfo->pResult[i];
+    if (pResult->closed) {
+      numOfClosed += 1;
+      continue;
+    }
+
+    TSKEY ekey = pResult->win.ekey;
+    if ((ekey <= lastKey && ascQuery) || (pResult->win.skey >= lastKey && !ascQuery)) {
+      closeTimeWindow(pWindowResInfo, i);
+    } else {
+      skey = pResult->win.skey;
+      break;
+    }
+  }
+
+  // all windows are closed, set the last one to be the skey
+  if (skey == TSKEY_INITIAL_VAL) {
+    assert(i == pWindowResInfo->size);
+    pWindowResInfo->curIndex = pWindowResInfo->size - 1;
+  } else {
+    pWindowResInfo->curIndex = i;
+    pWindowResInfo->prevSKey = pWindowResInfo->pResult[pWindowResInfo->curIndex]->win.skey;
+  }
+
+  return numOfClosed;
+}
+
 /**
  * NOTE: the query status only set for the first scan of master scan.
  */
 static int32_t doCheckQueryCompleted(SQueryRuntimeEnv *pRuntimeEnv, TSKEY lastKey, SResultRowInfo *pWindowResInfo) {
   SQuery *pQuery = pRuntimeEnv->pQuery;
-  if (pRuntimeEnv->scanFlag != MASTER_SCAN) {
-    return pWindowResInfo->size;
-  }
-
-  // for group by normal column query, close time window and return.
-  if (!QUERY_IS_INTERVAL_QUERY(pQuery)) {
-    closeAllTimeWindow(pWindowResInfo);
+  if (pRuntimeEnv->scanFlag != MASTER_SCAN || pWindowResInfo->size == 0) {
     return pWindowResInfo->size;
   }
 
   // no qualified results exist, abort check
   int32_t numOfClosed = 0;
-
-  if (pWindowResInfo->size == 0) {
-    return pWindowResInfo->size;
-  }
+  bool ascQuery = QUERY_IS_ASC_QUERY(pQuery);
 
   // query completed
-  if ((lastKey >= pQuery->current->win.ekey && QUERY_IS_ASC_QUERY(pQuery)) ||
-      (lastKey <= pQuery->current->win.ekey && !QUERY_IS_ASC_QUERY(pQuery))) {
+  if ((lastKey >= pQuery->current->win.ekey && ascQuery) || (lastKey <= pQuery->current->win.ekey && (!ascQuery))) {
     closeAllTimeWindow(pWindowResInfo);
 
     pWindowResInfo->curIndex = pWindowResInfo->size - 1;
     setQueryStatus(pQuery, QUERY_COMPLETED | QUERY_RESBUF_FULL);
   } else {  // set the current index to be the last unclosed window
-    int32_t i = 0;
-    int64_t skey = TSKEY_INITIAL_VAL;
-
-    for (i = 0; i < pWindowResInfo->size; ++i) {
-      SResultRow *pResult = pWindowResInfo->pResult[i];
-      if (pResult->closed) {
-        numOfClosed += 1;
-        continue;
-      }
-
-      TSKEY ekey = pResult->win.ekey;
-      if ((ekey <= lastKey && QUERY_IS_ASC_QUERY(pQuery)) ||
-          (pResult->win.skey >= lastKey && !QUERY_IS_ASC_QUERY(pQuery))) {
-        closeTimeWindow(pWindowResInfo, i);
-      } else {
-        skey = pResult->win.skey;
-        break;
-      }
-    }
-
-    // all windows are closed, set the last one to be the skey
-    if (skey == TSKEY_INITIAL_VAL) {
-      assert(i == pWindowResInfo->size);
-      pWindowResInfo->curIndex = pWindowResInfo->size - 1;
-    } else {
-      pWindowResInfo->curIndex = i;
-    }
-
-    pWindowResInfo->prevSKey = pWindowResInfo->pResult[pWindowResInfo->curIndex]->win.skey;
+    numOfClosed = updateResultRowCurrentIndex(pWindowResInfo, lastKey, ascQuery);
 
     // the number of completed slots are larger than the threshold, return current generated results to client.
     if (numOfClosed > pQuery->rec.threshold) {
@@ -1050,24 +1045,6 @@ static void setNotInterpoWindowKey(SQLFunctionCtx* pCtx, int32_t numOfOutput, in
   }
 }
 
-//static double getTSWindowInterpoVal(SColumnInfoData* pColInfo, int16_t srcColIndex, int16_t rowIndex, TSKEY key, char** prevRow, TSKEY* tsCols, int32_t step) {
-//  TSKEY start  = tsCols[rowIndex];
-//  TSKEY prevTs = (rowIndex == 0)? *(TSKEY *) prevRow[0] : tsCols[rowIndex - step];
-//
-//  double v1 = 0, v2 = 0, v = 0;
-//  char *prevVal = (rowIndex == 0)? prevRow[srcColIndex] : ((char*)pColInfo->pData) + (rowIndex - step) * pColInfo->info.bytes;
-//
-//  GET_TYPED_DATA(v1, double, pColInfo->info.type, (char *)prevVal);
-//  GET_TYPED_DATA(v2, double, pColInfo->info.type, (char *)pColInfo->pData + rowIndex * pColInfo->info.bytes);
-//
-//  SPoint point1 = (SPoint){.key = prevTs, .val = &v1};
-//  SPoint point2 = (SPoint){.key = start,  .val = &v2};
-//  SPoint point  = (SPoint){.key = key,    .val = &v};
-//  taosGetLinearInterpolationVal(TSDB_DATA_TYPE_DOUBLE, &point1, &point2, &point);
-//
-//  return v;
-//}
-
 // window start key interpolation
 static bool setTimeWindowInterpolationStartTs(SQueryRuntimeEnv* pRuntimeEnv, int32_t pos, int32_t numOfRows, SArray* pDataBlock, TSKEY* tsCols, STimeWindow* win) {
   SQuery* pQuery = pRuntimeEnv->pQuery;
@@ -1238,6 +1215,8 @@ static void blockwiseApplyFunctions(SQueryRuntimeEnv *pRuntimeEnv, SDataStatis *
           if (interp) {
             setResultRowInterpo(pResult, RESULT_ROW_START_INTERP);
           }
+        } else {
+          setNotInterpoWindowKey(pRuntimeEnv->pCtx, pQuery->numOfOutput, RESULT_ROW_START_INTERP);
         }
 
         done = resultRowInterpolated(pResult, RESULT_ROW_END_INTERP);
@@ -1249,6 +1228,8 @@ static void blockwiseApplyFunctions(SQueryRuntimeEnv *pRuntimeEnv, SDataStatis *
           if (interp) {
             setResultRowInterpo(pResult, RESULT_ROW_END_INTERP);
           }
+        } else {
+          setNotInterpoWindowKey(pRuntimeEnv->pCtx, pQuery->numOfOutput, RESULT_ROW_END_INTERP);
         }
       }
 
@@ -1289,6 +1270,8 @@ static void blockwiseApplyFunctions(SQueryRuntimeEnv *pRuntimeEnv, SDataStatis *
           if (interp) {
             setResultRowInterpo(pResult, RESULT_ROW_START_INTERP);
           }
+        } else {
+          setNotInterpoWindowKey(pRuntimeEnv->pCtx, pQuery->numOfOutput, RESULT_ROW_START_INTERP);
         }
 
         done = resultRowInterpolated(pResult, RESULT_ROW_END_INTERP);
@@ -1299,6 +1282,8 @@ static void blockwiseApplyFunctions(SQueryRuntimeEnv *pRuntimeEnv, SDataStatis *
           if (interp) {
             setResultRowInterpo(pResult, RESULT_ROW_END_INTERP);
           }
+        } else {
+          setNotInterpoWindowKey(pRuntimeEnv->pCtx, pQuery->numOfOutput, RESULT_ROW_END_INTERP);
         }
       }
 
@@ -1802,9 +1787,12 @@ static int32_t tableApplyFunctionsOnBlock(SQueryRuntimeEnv *pRuntimeEnv, SDataBl
 
   // interval query with limit applied
   int32_t numOfRes = 0;
-  if (QUERY_IS_INTERVAL_QUERY(pQuery) || pRuntimeEnv->groupbyNormalCol) {
+  if (QUERY_IS_INTERVAL_QUERY(pQuery)) {
     numOfRes = doCheckQueryCompleted(pRuntimeEnv, lastKey, pWindowResInfo);
-  } else {
+  } else if (pRuntimeEnv->groupbyNormalCol) {
+    closeAllTimeWindow(pWindowResInfo);
+    numOfRes = pWindowResInfo->size;
+  } else { // projection query
     numOfRes = (int32_t)getNumOfResult(pRuntimeEnv);
 
     // update the number of output result
@@ -4487,6 +4475,18 @@ static void stableApplyFunctionsOnBlock(SQueryRuntimeEnv *pRuntimeEnv, SDataBloc
   } else {
     blockwiseApplyFunctions(pRuntimeEnv, pStatis, pDataBlockInfo, pWindowResInfo, searchFn, pDataBlock);
   }
+
+  if (QUERY_IS_INTERVAL_QUERY(pQuery)) {
+    bool ascQuery = QUERY_IS_ASC_QUERY(pQuery);
+
+    // TODO refactor
+    if ((pTableQueryInfo->lastKey >= pTableQueryInfo->win.ekey && ascQuery) || (pTableQueryInfo->lastKey <= pTableQueryInfo->win.ekey && (!ascQuery))) {
+      closeAllTimeWindow(pWindowResInfo);
+      pWindowResInfo->curIndex = pWindowResInfo->size - 1;
+    } else {
+      updateResultRowCurrentIndex(pWindowResInfo, pTableQueryInfo->lastKey, ascQuery);
+    }
+  }
 }
 
 bool queryHasRemainResForTableQuery(SQueryRuntimeEnv* pRuntimeEnv) {
diff --git a/tests/script/general/parser/function.sim b/tests/script/general/parser/function.sim
index 34e9844f711313d9f7c1c2380177bfc2c7aa4740..79c620f90d06f1131c45d1705dccd5e5b311585e 100644
--- a/tests/script/general/parser/function.sim
+++ b/tests/script/general/parser/function.sim
@@ -111,7 +111,7 @@ if $rows != 2 then
  return -1
 endi
 
-if $data00 != @15-08-18 00:06:00.00@ then
+if $data00 != @15-08-18 00:06:00.000@ then
   return -1
 endi
 
@@ -219,10 +219,15 @@ if $data02 != 6 then
   return -1
 endi
 
+sql select twa(k) from t1 where ts>'2015-8-18 00:00:00' and ts<'2015-8-18 00:00:1'
+if $rows != 0 then
+  return -1
+endi
+
 sql select twa(k),avg(k),count(1) from t1 where ts>='2015-8-18 00:00:00' and ts<='2015-8-18 00:30:00' interval(10m) order by ts asc
 sql select twa(k),avg(k),count(1) from t1 where ts>='2015-8-18 00:00:00' and ts<='2015-8-18 00:30:00' interval(10m) order by ts desc
 
 
-#todo add test case while column filte exists.
+#todo add test case while column filter exists.
 
-select count(*),TWA(k) from tm0 where ts>='1970-1-1 13:43:00' and ts<='1970-1-1 13:44:10' interval(9s)
+#sql select count(*),TWA(k) from tm0 where ts>='1970-1-1 13:43:00' and ts<='1970-1-1 13:44:10' interval(9s)
diff --git a/tests/script/general/parser/testSuite.sim b/tests/script/general/parser/testSuite.sim
index 8593400ce8c3d6ae5375993b0fcc1d7c36b86ca8..cea6d98679945b1d0e8d4dc82f3dd389b3d04a30 100644
--- a/tests/script/general/parser/testSuite.sim
+++ b/tests/script/general/parser/testSuite.sim
@@ -103,6 +103,8 @@ sleep 500
 run general/parser/timestamp.sim
 sleep 500
 run general/parser/sliding.sim
+sleep 500
+run general/parser/function.sim
 
 #sleep 500
 #run general/parser/repeatStream.sim