diff --git a/src/client/inc/tsclient.h b/src/client/inc/tsclient.h
index bdb35cb072..f2a9b9db43 100644
--- a/src/client/inc/tsclient.h
+++ b/src/client/inc/tsclient.h
@@ -285,8 +285,8 @@ typedef struct {
   char **        buffer;  // Buffer used to put multibytes encoded using unicode (wchar_t)
   SColumnIndex*  pColumnIndex;
 
-  SArithmeticSupport*   pArithSup;   // support the arithmetic expression calculation on agg functions
-  struct SLocalReducer* pLocalReducer;
+  SArithmeticSupport   *pArithSup;   // support the arithmetic expression calculation on agg functions
+  struct SLocalReducer *pLocalReducer;
 } SSqlRes;
 
 typedef struct STscObj {
diff --git a/src/client/src/tscFunctionImpl.c b/src/client/src/tscFunctionImpl.c
index 62e55c033f..7560d94242 100644
--- a/src/client/src/tscFunctionImpl.c
+++ b/src/client/src/tscFunctionImpl.c
@@ -2222,7 +2222,8 @@ static void buildTopBotStruct(STopBotInfo *pTopBotInfo, SQLFunctionCtx *pCtx) {
   tmp += POINTER_BYTES * pCtx->param[0].i64Key;
   
   size_t size = sizeof(tValuePair) + pCtx->tagInfo.tagsLen;
-  
+//  assert(pCtx->param[0].i64Key > 0);
+
   for (int32_t i = 0; i < pCtx->param[0].i64Key; ++i) {
     pTopBotInfo->res[i] = (tValuePair*) tmp;
     pTopBotInfo->res[i]->pTags = tmp + sizeof(tValuePair);
diff --git a/src/client/src/tscLocal.c b/src/client/src/tscLocal.c
index bd444a1231..192af4dbdf 100644
--- a/src/client/src/tscLocal.c
+++ b/src/client/src/tscLocal.c
@@ -46,7 +46,8 @@ typedef struct SCreateBuilder {
   SSqlObj *pInterSql;
   int32_t (*fp)(void *para, char* result);
   Stage callStage;
-} SCreateBuilder; 
+} SCreateBuilder;
+
 static void tscSetLocalQueryResult(SSqlObj *pSql, const char *val, const char *columnName, int16_t type, size_t valueLength);
 
 static int32_t tscSetValueToResObj(SSqlObj *pSql, int32_t rowLen) {
@@ -207,10 +208,7 @@ static int32_t tscProcessDescribeTable(SSqlObj *pSql) {
   const int32_t TYPE_COLUMN_LENGTH = 16;
   const int32_t NOTE_COLUMN_MIN_LENGTH = 8;
 
-  int32_t noteFieldLen = NOTE_COLUMN_MIN_LENGTH;//tscMaxLengthOfTagsFields(pSql);
-//  if (noteFieldLen == 0) {
-//    noteFieldLen = NOTE_COLUMN_MIN_LENGTH;
-//  }
+  int32_t noteFieldLen = NOTE_COLUMN_MIN_LENGTH;
 
   int32_t rowLen = tscBuildTableSchemaResultFields(pSql, NUM_OF_DESC_TABLE_COLUMNS, TYPE_COLUMN_LENGTH, noteFieldLen);
   tscFieldInfoUpdateOffset(pQueryInfo);
@@ -822,26 +820,39 @@ static int32_t tscProcessClientVer(SSqlObj *pSql) {
 
 }
 
+// TODO add test cases.
+static int32_t checkForOnlineNode(SSqlObj* pSql) {
+  int32_t* data = pSql->res.length;
+  if (data == NULL) {
+    return TSDB_CODE_SUCCESS;
+  }
+
+  int32_t total  = data[0];
+  int32_t online = data[1];
+  return (online < total)? TSDB_CODE_RPC_NETWORK_UNAVAIL:TSDB_CODE_SUCCESS;
+}
+
 static int32_t tscProcessServStatus(SSqlObj *pSql) {
   STscObj* pObj = pSql->pTscObj;
 
   SSqlObj* pHb = (SSqlObj*)taosAcquireRef(tscObjRef, pObj->hbrid);
   if (pHb != NULL) {
-    int32_t code = pHb->res.code;
+    pSql->res.code = pHb->res.code;
     taosReleaseRef(tscObjRef, pObj->hbrid);
-    if (code == TSDB_CODE_RPC_NETWORK_UNAVAIL) {
-      pSql->res.code = TSDB_CODE_RPC_NETWORK_UNAVAIL;
-      return pSql->res.code;
-    }
-  } else {
-    if (pSql->res.code == TSDB_CODE_RPC_NETWORK_UNAVAIL) {
-      return pSql->res.code;
-    }
+  }
+
+  if (pSql->res.code == TSDB_CODE_RPC_NETWORK_UNAVAIL) {
+    return pSql->res.code;
+  }
+
+  pSql->res.code = checkForOnlineNode(pHb);
+  if (pSql->res.code == TSDB_CODE_RPC_NETWORK_UNAVAIL) {
+    return pSql->res.code;
   }
 
   SQueryInfo* pQueryInfo = tscGetQueryInfoDetail(&pSql->cmd, 0);
-
   SSqlExpr* pExpr = taosArrayGetP(pQueryInfo->exprList, 0);
+
   int32_t val = 1;
   tscSetLocalQueryResult(pSql, (char*) &val, pExpr->aliasName, TSDB_DATA_TYPE_INT, sizeof(int32_t));
   return TSDB_CODE_SUCCESS;
diff --git a/src/client/src/tscSQLParser.c b/src/client/src/tscSQLParser.c
index 8e4ef91e27..1cfbea4cc4 100644
--- a/src/client/src/tscSQLParser.c
+++ b/src/client/src/tscSQLParser.c
@@ -6562,7 +6562,7 @@ int32_t doCheckForQuery(SSqlObj* pSql, SQuerySQL* pQuerySql, int32_t index) {
       return invalidSqlErrMsg(tscGetErrorMsgPayload(pCmd), msg5);
     }
 
-    if (pQueryInfo->interval.interval > 0 && pQueryInfo->interval.intervalUnit != 'n' && pQueryInfo->interval.intervalUnit != 'y') {
+    if (pQueryInfo->interval.interval > 0) {
       bool initialWindows = TSWINDOW_IS_EQUAL(pQueryInfo->window, TSWINDOW_INITIALIZER);
       if (initialWindows) {
         return invalidSqlErrMsg(tscGetErrorMsgPayload(pCmd), msg6);
diff --git a/src/client/src/tscServer.c b/src/client/src/tscServer.c
index a9f64e0764..0e3dc3efd5 100644
--- a/src/client/src/tscServer.c
+++ b/src/client/src/tscServer.c
@@ -147,15 +147,15 @@ void tscProcessHeartBeatRsp(void *param, TAOS_RES *tres, int code) {
   SSqlObj *pSql = tres;
   SSqlRes *pRes = &pSql->res;
 
-  if (code == 0) {
+  if (code == TSDB_CODE_SUCCESS) {
     SHeartBeatRsp *pRsp = (SHeartBeatRsp *)pRes->pRsp;
-    SRpcEpSet *    epSet = &pRsp->epSet;
+    SRpcEpSet     *epSet = &pRsp->epSet;
     if (epSet->numOfEps > 0) {
       tscEpSetHtons(epSet);
       if (!tscEpSetIsEqual(&pSql->pTscObj->tscCorMgmtEpSet->epSet, epSet)) {
         tscTrace("%p updating epset: numOfEps: %d, inUse: %d", pSql, epSet->numOfEps, epSet->inUse);
         for (int8_t i = 0; i < epSet->numOfEps; i++) {
-          tscTrace("endpoint %d: fqdn = %s, port=%d", i, epSet->fqdn[i], epSet->port[i]);
+          tscTrace("endpoint %d: fqdn=%s, port=%d", i, epSet->fqdn[i], epSet->port[i]);
         }
         tscUpdateMgmtEpSet(pSql, epSet);
       }
@@ -167,11 +167,40 @@ void tscProcessHeartBeatRsp(void *param, TAOS_RES *tres, int code) {
       tscKillConnection(pObj);
       return;
     } else {
-      if (pRsp->queryId) tscKillQuery(pObj, htonl(pRsp->queryId));
-      if (pRsp->streamId) tscKillStream(pObj, htonl(pRsp->streamId));
+      if (pRsp->queryId) {
+        tscKillQuery(pObj, htonl(pRsp->queryId));
+      }
+
+      if (pRsp->streamId) {
+        tscKillStream(pObj, htonl(pRsp->streamId));
+      }
     }
+
+    int32_t total  = htonl(pRsp->totalDnodes);
+    int32_t online = htonl(pRsp->onlineDnodes);
+    assert(online <= total);
+
+    if (online < total) {
+      tscError("HB:%p, total dnode:%d, online dnode:%d", pSql, total, online);
+      pSql->res.code = TSDB_CODE_RPC_NETWORK_UNAVAIL;
+    }
+
+    if (pRes->buffer == NULL) {
+      pRes->length = calloc(2,  sizeof(int32_t));
+    }
+
+    pRes->length[0] = total;
+    pRes->length[1] = online;
   } else {
     tscDebug("%" PRId64 " heartbeat failed, code:%s", pObj->hbrid, tstrerror(code));
+    if (pRes->buffer == NULL) {
+      pRes->length = calloc(2, sizeof(int32_t));
+    }
+
+    pRes->length[1] = 0;
+    if (pRes->length[0] == 0) {
+      pRes->length[0] = 1; // make sure that the value of the total node is greater than the online node
+    }
   }
 
   if (pObj->hbrid != 0) {
diff --git a/src/client/src/tscSubquery.c b/src/client/src/tscSubquery.c
index d2eb16795f..1e95380096 100644
--- a/src/client/src/tscSubquery.c
+++ b/src/client/src/tscSubquery.c
@@ -2279,7 +2279,6 @@ static void multiVnodeInsertFinalize(void* param, TAOS_RES* tres, int numOfRows)
  */
 int32_t tscHandleInsertRetry(SSqlObj* pParent, SSqlObj* pSql) {
   assert(pSql != NULL && pSql->param != NULL);
-//  SSqlCmd* pCmd = &pSql->cmd;
   SSqlRes* pRes = &pSql->res;
 
   SInsertSupporter* pSupporter = (SInsertSupporter*) pSql->param;
@@ -2288,9 +2287,6 @@ int32_t tscHandleInsertRetry(SSqlObj* pParent, SSqlObj* pSql) {
   STableDataBlocks* pTableDataBlock = taosArrayGetP(pParent->cmd.pDataBlocks, pSupporter->index);
   int32_t code = tscCopyDataBlockToPayload(pSql, pTableDataBlock);
 
-  // free the data block created from insert sql string
-//  pCmd->pDataBlocks = tscDestroyBlockArrayList(pParent->cmd.pDataBlocks);
-
   if ((pRes->code = code)!= TSDB_CODE_SUCCESS) {
     tscQueueAsyncRes(pSql);
     return code;  // here the pSql may have been released already.
diff --git a/src/inc/ttype.h b/src/inc/ttype.h
index 7d5779c43f..3dd0c58ae2 100644
--- a/src/inc/ttype.h
+++ b/src/inc/ttype.h
@@ -8,25 +8,26 @@ extern "C" {
 #include "taosdef.h"
 
 #define GET_TYPED_DATA(_v, _finalType, _type, _data) \
-  switch (_type) {                       \
-    case TSDB_DATA_TYPE_TINYINT:         \
+  switch (_type) {                                   \
+    case TSDB_DATA_TYPE_BOOL:                        \
+    case TSDB_DATA_TYPE_TINYINT:                     \
       (_v) = (_finalType)GET_INT8_VAL(_data);        \
-      break;                             \
-    case TSDB_DATA_TYPE_SMALLINT:        \
+      break;                                         \
+    case TSDB_DATA_TYPE_SMALLINT:                    \
       (_v) = (_finalType)GET_INT16_VAL(_data);       \
-      break;                             \
-    case TSDB_DATA_TYPE_BIGINT:          \
+      break;                                         \
+    case TSDB_DATA_TYPE_BIGINT:                      \
       (_v) = (_finalType)(GET_INT64_VAL(_data));     \
-      break;                             \
-    case TSDB_DATA_TYPE_FLOAT:           \
+      break;                                         \
+    case TSDB_DATA_TYPE_FLOAT:                       \
       (_v) = (_finalType)GET_FLOAT_VAL(_data);       \
-      break;                             \
-    case TSDB_DATA_TYPE_DOUBLE:          \
+      break;                                         \
+    case TSDB_DATA_TYPE_DOUBLE:                      \
       (_v) = (_finalType)GET_DOUBLE_VAL(_data);      \
-      break;                             \
-    default:                             \
+      break;                                         \
+    default:                                         \
       (_v) = (_finalType)GET_INT32_VAL(_data);       \
-      break;                             \
+      break;                                         \
   };
 
 #ifdef __cplusplus
diff --git a/src/query/inc/qUtil.h b/src/query/inc/qUtil.h
index fb71c8a5fe..dde2e39845 100644
--- a/src/query/inc/qUtil.h
+++ b/src/query/inc/qUtil.h
@@ -24,35 +24,34 @@
 
 #define GET_RES_WINDOW_KEY_LEN(_l) ((_l) + sizeof(uint64_t))
 
-int32_t getOutputInterResultBufSize(SQuery* pQuery);
-
-void clearResultRow(SQueryRuntimeEnv* pRuntimeEnv, SResultRow* pRow, int16_t type);
-void copyResultRow(SQueryRuntimeEnv* pRuntimeEnv, SResultRow* dst, const SResultRow* src, int16_t type);
-SResultRowCellInfo* getResultCell(SQueryRuntimeEnv* pRuntimeEnv, const SResultRow* pRow, int32_t index);
-
-int32_t initWindowResInfo(SResultRowInfo* pWindowResInfo, int32_t size, int16_t type);
-
-void    cleanupTimeWindowInfo(SResultRowInfo* pWindowResInfo);
-void    resetTimeWindowInfo(SQueryRuntimeEnv* pRuntimeEnv, SResultRowInfo* pWindowResInfo);
-void    clearFirstNWindowRes(SQueryRuntimeEnv *pRuntimeEnv, int32_t num);
-
-void    clearClosedTimeWindow(SQueryRuntimeEnv* pRuntimeEnv);
-int32_t numOfClosedTimeWindow(SResultRowInfo* pWindowResInfo);
-void    closeTimeWindow(SResultRowInfo* pWindowResInfo, int32_t slot);
-void    closeAllTimeWindow(SResultRowInfo* pWindowResInfo);
-void    removeRedundantWindow(SResultRowInfo *pWindowResInfo, TSKEY lastKey, int32_t order);
-
-static FORCE_INLINE SResultRow *getResultRow(SResultRowInfo *pWindowResInfo, int32_t slot) {
-  assert(pWindowResInfo != NULL && slot >= 0 && slot < pWindowResInfo->size);
-  return pWindowResInfo->pResult[slot];
-}
-
 #define curTimeWindowIndex(_winres)        ((_winres)->curIndex)
 #define GET_ROW_PARAM_FOR_MULTIOUTPUT(_q, tbq, sq) (((tbq) && (!sq))? (_q)->pExpr1[1].base.arg->argValue.i64:1)
 
-bool isWindowResClosed(SResultRowInfo *pWindowResInfo, int32_t slot);
+int32_t getOutputInterResultBufSize(SQuery* pQuery);
+
+size_t  getResultRowSize(SQueryRuntimeEnv* pRuntimeEnv);
+int32_t initResultRowInfo(SResultRowInfo* pResultRowInfo, int32_t size, int16_t type);
+void    cleanupResultRowInfo(SResultRowInfo* pResultRowInfo);
+
+void    resetResultRowInfo(SQueryRuntimeEnv* pRuntimeEnv, SResultRowInfo* pResultRowInfo);
+void    popFrontResultRow(SQueryRuntimeEnv *pRuntimeEnv, SResultRowInfo *pResultRowInfo, int32_t num);
+void    clearClosedResultRows(SQueryRuntimeEnv* pRuntimeEnv, SResultRowInfo *pResultRowInfo);
+int32_t numOfClosedResultRows(SResultRowInfo* pResultRowInfo);
+void    closeAllResultRows(SResultRowInfo* pResultRowInfo);
+void    removeRedundantResultRows(SResultRowInfo *pResultRowInfo, TSKEY lastKey, int32_t order);
 
 int32_t initResultRow(SResultRow *pResultRow);
+void    closeResultRow(SResultRowInfo* pResultRowInfo, int32_t slot);
+bool    isResultRowClosed(SResultRowInfo *pResultRowInfo, int32_t slot);
+void    clearResultRow(SQueryRuntimeEnv* pRuntimeEnv, SResultRow* pResultRow, int16_t type);
+void    copyResultRow(SQueryRuntimeEnv* pRuntimeEnv, SResultRow* dst, const SResultRow* src, int16_t type);
+
+SResultRowCellInfo* getResultCell(SQueryRuntimeEnv* pRuntimeEnv, const SResultRow* pRow, int32_t index);
+
+static FORCE_INLINE SResultRow *getResultRow(SResultRowInfo *pResultRowInfo, int32_t slot) {
+  assert(pResultRowInfo != NULL && slot >= 0 && slot < pResultRowInfo->size);
+  return pResultRowInfo->pResult[slot];
+}
 
 static FORCE_INLINE char *getPosInResultPage(SQueryRuntimeEnv *pRuntimeEnv, int32_t columnIndex, SResultRow *pResult,
     tFilePage* page) {
@@ -71,8 +70,6 @@ bool notNull_filter(SColumnFilterElem *pFilter, char* minval, char* maxval);
 __filter_func_t *getRangeFilterFuncArray(int32_t type);
 __filter_func_t *getValueFilterFuncArray(int32_t type);
 
-size_t getWindowResultSize(SQueryRuntimeEnv* pRuntimeEnv);
-
 SResultRowPool* initResultRowPool(size_t size);
 SResultRow* getNewResultRow(SResultRowPool* p);
 int64_t getResultRowPoolMemSize(SResultRowPool* p);
diff --git a/src/query/src/qExecutor.c b/src/query/src/qExecutor.c
index 58f05c9d9d..1f07e2bf6a 100644
--- a/src/query/src/qExecutor.c
+++ b/src/query/src/qExecutor.c
@@ -464,13 +464,13 @@ static bool hasNullValue(SColIndex* pColIndex, SDataStatis *pStatis, SDataStatis
   return true;
 }
 
-static SResultRow *doPrepareResultRowFromKey(SQueryRuntimeEnv *pRuntimeEnv, SResultRowInfo *pWindowResInfo, char *pData,
+static SResultRow *doPrepareResultRowFromKey(SQueryRuntimeEnv *pRuntimeEnv, SResultRowInfo *pResultRowInfo, char *pData,
                                              int16_t bytes, bool masterscan, uint64_t uid) {
   SET_RES_WINDOW_KEY(pRuntimeEnv->keyBuf, pData, bytes, uid);
   int32_t *p1 =
       (int32_t *)taosHashGet(pRuntimeEnv->pResultRowHashTable, pRuntimeEnv->keyBuf, GET_RES_WINDOW_KEY_LEN(bytes));
   if (p1 != NULL) {
-    pWindowResInfo->curIndex = *p1;
+    pResultRowInfo->curIndex = *p1;
   } else {
     if (!masterscan) {  // not master scan, do not add new timewindow
       return NULL;
@@ -478,46 +478,46 @@ static SResultRow *doPrepareResultRowFromKey(SQueryRuntimeEnv *pRuntimeEnv, SRes
 
     // TODO refactor
     // more than the capacity, reallocate the resources
-    if (pWindowResInfo->size >= pWindowResInfo->capacity) {
+    if (pResultRowInfo->size >= pResultRowInfo->capacity) {
       int64_t newCapacity = 0;
-      if (pWindowResInfo->capacity > 10000) {
-        newCapacity = (int64_t)(pWindowResInfo->capacity * 1.25);
+      if (pResultRowInfo->capacity > 10000) {
+        newCapacity = (int64_t)(pResultRowInfo->capacity * 1.25);
       } else {
-        newCapacity = (int64_t)(pWindowResInfo->capacity * 1.5);
+        newCapacity = (int64_t)(pResultRowInfo->capacity * 1.5);
       }
 
-      char *t = realloc(pWindowResInfo->pResult, (size_t)(newCapacity * POINTER_BYTES));
+      char *t = realloc(pResultRowInfo->pResult, (size_t)(newCapacity * POINTER_BYTES));
       if (t == NULL) {
         longjmp(pRuntimeEnv->env, TSDB_CODE_QRY_OUT_OF_MEMORY);
       }
 
-      pWindowResInfo->pResult = (SResultRow **)t;
+      pResultRowInfo->pResult = (SResultRow **)t;
 
-      int32_t inc = (int32_t)newCapacity - pWindowResInfo->capacity;
-      memset(&pWindowResInfo->pResult[pWindowResInfo->capacity], 0, POINTER_BYTES * inc);
+      int32_t inc = (int32_t)newCapacity - pResultRowInfo->capacity;
+      memset(&pResultRowInfo->pResult[pResultRowInfo->capacity], 0, POINTER_BYTES * inc);
 
-      pWindowResInfo->capacity = (int32_t)newCapacity;
+      pResultRowInfo->capacity = (int32_t)newCapacity;
     }
 
     SResultRow *pResult = getNewResultRow(pRuntimeEnv->pool);
-    pWindowResInfo->pResult[pWindowResInfo->size] = pResult;
+    pResultRowInfo->pResult[pResultRowInfo->size] = pResult;
     int32_t ret = initResultRow(pResult);
     if (ret != TSDB_CODE_SUCCESS) {
       longjmp(pRuntimeEnv->env, TSDB_CODE_QRY_OUT_OF_MEMORY);
     }
 
     // add a new result set for a new group
-    pWindowResInfo->curIndex = pWindowResInfo->size++;
+    pResultRowInfo->curIndex = pResultRowInfo->size++;
     taosHashPut(pRuntimeEnv->pResultRowHashTable, pRuntimeEnv->keyBuf, GET_RES_WINDOW_KEY_LEN(bytes),
-                (char *)&pWindowResInfo->curIndex, sizeof(int32_t));
+                (char *)&pResultRowInfo->curIndex, sizeof(int32_t));
   }
 
   // too many time window in query
-  if (pWindowResInfo->size > MAX_INTERVAL_TIME_WINDOW) {
+  if (pResultRowInfo->size > MAX_INTERVAL_TIME_WINDOW) {
     longjmp(pRuntimeEnv->env, TSDB_CODE_QRY_TOO_MANY_TIMEWINDOW);
   }
 
-  return getResultRow(pWindowResInfo, pWindowResInfo->curIndex);
+  return getResultRow(pResultRowInfo, pResultRowInfo->curIndex);
 }
 
 // get the correct time window according to the handled timestamp
@@ -614,14 +614,14 @@ static int32_t addNewWindowResultBuf(SResultRow *pWindowRes, SDiskbasedResultBuf
   return 0;
 }
 
-static int32_t setWindowOutputBufByKey(SQueryRuntimeEnv *pRuntimeEnv, SResultRowInfo *pWindowResInfo, SDataBlockInfo* pBockInfo,
+static int32_t setWindowOutputBufByKey(SQueryRuntimeEnv *pRuntimeEnv, SResultRowInfo *pResultRowInfo, SDataBlockInfo* pBockInfo,
                                        STimeWindow *win, bool masterscan, bool* newWind, SResultRow** pResult) {
   assert(win->skey <= win->ekey);
   SDiskbasedResultBuf *pResultBuf = pRuntimeEnv->pResultBuf;
 
   // todo refactor
   int64_t uid = getResultInfoUId(pRuntimeEnv);
-  SResultRow *pResultRow = doPrepareResultRowFromKey(pRuntimeEnv, pWindowResInfo, (char *)&win->skey, TSDB_KEYSIZE, masterscan, uid);
+  SResultRow *pResultRow = doPrepareResultRowFromKey(pRuntimeEnv, pResultRowInfo, (char *)&win->skey, TSDB_KEYSIZE, masterscan, uid);
   if (pResultRow == NULL) {
     *newWind = false;
 
@@ -717,7 +717,7 @@ static int32_t updateResultRowCurrentIndex(SResultRowInfo* pWindowResInfo, TSKEY
 
     TSKEY ekey = pResult->win.ekey;
     if ((ekey <= lastKey && ascQuery) || (pResult->win.skey >= lastKey && !ascQuery)) {
-      closeTimeWindow(pWindowResInfo, i);
+      closeResultRow(pWindowResInfo, i);
     } else {
       skey = pResult->win.skey;
       break;
@@ -751,7 +751,7 @@ static int32_t doCheckQueryCompleted(SQueryRuntimeEnv *pRuntimeEnv, TSKEY lastKe
 
   // query completed
   if ((lastKey >= pQuery->current->win.ekey && ascQuery) || (lastKey <= pQuery->current->win.ekey && (!ascQuery))) {
-    closeAllTimeWindow(pWindowResInfo);
+    closeAllResultRows(pWindowResInfo);
 
     pWindowResInfo->curIndex = pWindowResInfo->size - 1;
     setQueryStatus(pQuery, QUERY_COMPLETED | QUERY_RESBUF_FULL);
@@ -1351,14 +1351,7 @@ static int32_t setGroupResultOutputBuf(SQueryRuntimeEnv *pRuntimeEnv, char *pDat
   }
 
   int64_t v = -1;
-  switch(type) {
-    case TSDB_DATA_TYPE_BOOL:
-    case TSDB_DATA_TYPE_TINYINT:  v = GET_INT8_VAL(pData);  break;
-    case TSDB_DATA_TYPE_SMALLINT: v = GET_INT16_VAL(pData); break;
-    case TSDB_DATA_TYPE_INT:      v = GET_INT32_VAL(pData); break;
-    case TSDB_DATA_TYPE_BIGINT:   v = GET_INT64_VAL(pData); break;
-  }
-
+  GET_TYPED_DATA(v, int64_t, type, pData);
   if (type == TSDB_DATA_TYPE_BINARY || type == TSDB_DATA_TYPE_NCHAR) {
     if (pResultRow->key == NULL) {
       pResultRow->key = malloc(varDataTLen(pData));
@@ -1790,7 +1783,7 @@ static int32_t tableApplyFunctionsOnBlock(SQueryRuntimeEnv *pRuntimeEnv, SDataBl
   if (QUERY_IS_INTERVAL_QUERY(pQuery)) {
     numOfRes = doCheckQueryCompleted(pRuntimeEnv, lastKey, pWindowResInfo);
   } else if (pRuntimeEnv->groupbyNormalCol) {
-    closeAllTimeWindow(pWindowResInfo);
+    closeAllResultRows(pWindowResInfo);
     numOfRes = pWindowResInfo->size;
   } else { // projection query
     numOfRes = (int32_t)getNumOfResult(pRuntimeEnv);
@@ -2094,7 +2087,7 @@ static void teardownQueryRuntimeEnv(SQueryRuntimeEnv *pRuntimeEnv) {
   SQInfo* pQInfo = (SQInfo*) GET_QINFO_ADDR(pRuntimeEnv);
 
   qDebug("QInfo:%p teardown runtime env", pQInfo);
-  cleanupTimeWindowInfo(&pRuntimeEnv->windowResInfo);
+  cleanupResultRowInfo(&pRuntimeEnv->windowResInfo);
 
   if (pRuntimeEnv->pCtx != NULL) {
     for (int32_t i = 0; i < pQuery->numOfOutput; ++i) {
@@ -2928,7 +2921,7 @@ static int64_t doScanAllDataBlocks(SQueryRuntimeEnv *pRuntimeEnv) {
 
   if (QUERY_IS_INTERVAL_QUERY(pQuery) && (IS_MASTER_SCAN(pRuntimeEnv)|| pRuntimeEnv->scanFlag == REPEAT_SCAN)) {
     if (Q_STATUS_EQUAL(pQuery->status, QUERY_COMPLETED)) {
-      closeAllTimeWindow(&pRuntimeEnv->windowResInfo);
+      closeAllResultRows(&pRuntimeEnv->windowResInfo);
       pRuntimeEnv->windowResInfo.curIndex = pRuntimeEnv->windowResInfo.size - 1;  // point to the last time window
     } else {
       assert(Q_STATUS_EQUAL(pQuery->status, QUERY_RESBUF_FULL));
@@ -3707,8 +3700,8 @@ void switchCtxOrder(SQueryRuntimeEnv *pRuntimeEnv) {
 
 int32_t initResultRow(SResultRow *pResultRow) {
   pResultRow->pCellInfo = (SResultRowCellInfo*)((char*)pResultRow + sizeof(SResultRow));
-  pResultRow->pageId = -1;
-  pResultRow->rowId = -1;
+  pResultRow->pageId    = -1;
+  pResultRow->rowId     = -1;
   return TSDB_CODE_SUCCESS;
 }
 
@@ -4057,12 +4050,12 @@ void finalizeQueryResult(SQueryRuntimeEnv *pRuntimeEnv) {
     // for each group result, call the finalize function for each column
     SResultRowInfo *pWindowResInfo = &pRuntimeEnv->windowResInfo;
     if (pRuntimeEnv->groupbyNormalCol) {
-      closeAllTimeWindow(pWindowResInfo);
+      closeAllResultRows(pWindowResInfo);
     }
 
     for (int32_t i = 0; i < pWindowResInfo->size; ++i) {
       SResultRow *buf = pWindowResInfo->pResult[i];
-      if (!isWindowResClosed(pWindowResInfo, i)) {
+      if (!isResultRowClosed(pWindowResInfo, i)) {
         continue;
       }
 
@@ -4112,7 +4105,7 @@ static STableQueryInfo *createTableQueryInfo(SQueryRuntimeEnv *pRuntimeEnv, void
   // set more initial size of interval/groupby query
   if (QUERY_IS_INTERVAL_QUERY(pQuery) || pRuntimeEnv->groupbyNormalCol) {
     int32_t initialSize = 128;
-    int32_t code = initWindowResInfo(&pTableQueryInfo->windowResInfo, initialSize, TSDB_DATA_TYPE_INT);
+    int32_t code = initResultRowInfo(&pTableQueryInfo->windowResInfo, initialSize, TSDB_DATA_TYPE_INT);
     if (code != TSDB_CODE_SUCCESS) {
       return NULL;
     }
@@ -4128,7 +4121,7 @@ void destroyTableQueryInfoImpl(STableQueryInfo *pTableQueryInfo) {
   }
 
   tVariantDestroy(&pTableQueryInfo->tag);
-  cleanupTimeWindowInfo(&pTableQueryInfo->windowResInfo);
+  cleanupResultRowInfo(&pTableQueryInfo->windowResInfo);
 }
 
 /**
@@ -4360,7 +4353,7 @@ static int32_t doCopyToSData(SQInfo *pQInfo, SResultRowInfo *pResultInfo, int32_
   int32_t step = -1;
 
   qDebug("QInfo:%p start to copy data from windowResInfo to query buf", pQInfo);
-  int32_t totalSet = numOfClosedTimeWindow(pResultInfo);
+  int32_t totalSet = numOfClosedResultRows(pResultInfo);
   SResultRow** result = pResultInfo->pResult;
 
   if (orderType == TSDB_ORDER_ASC) {
@@ -4481,7 +4474,7 @@ static void stableApplyFunctionsOnBlock(SQueryRuntimeEnv *pRuntimeEnv, SDataBloc
 
     // TODO refactor
     if ((pTableQueryInfo->lastKey >= pTableQueryInfo->win.ekey && ascQuery) || (pTableQueryInfo->lastKey <= pTableQueryInfo->win.ekey && (!ascQuery))) {
-      closeAllTimeWindow(pWindowResInfo);
+      closeAllResultRows(pWindowResInfo);
       pWindowResInfo->curIndex = pWindowResInfo->size - 1;
     } else {
       updateResultRowCurrentIndex(pWindowResInfo, pTableQueryInfo->lastKey, ascQuery);
@@ -5031,7 +5024,7 @@ int32_t doInitQInfo(SQInfo *pQInfo, STSBuf *pTsBuf, void *tsdb, int32_t vgId, bo
         type = TSDB_DATA_TYPE_INT;  // group id
       }
 
-      code = initWindowResInfo(&pRuntimeEnv->windowResInfo, 8, type);
+      code = initResultRowInfo(&pRuntimeEnv->windowResInfo, 8, type);
       if (code != TSDB_CODE_SUCCESS) {
         return code;
       }
@@ -5051,7 +5044,7 @@ int32_t doInitQInfo(SQInfo *pQInfo, STSBuf *pTsBuf, void *tsdb, int32_t vgId, bo
       type = TSDB_DATA_TYPE_TIMESTAMP;
     }
 
-    code = initWindowResInfo(&pRuntimeEnv->windowResInfo, numOfResultRows, type);
+    code = initResultRowInfo(&pRuntimeEnv->windowResInfo, numOfResultRows, type);
     if (code != TSDB_CODE_SUCCESS) {
       return code;
     }
@@ -5479,7 +5472,7 @@ static void sequentialTableProcess(SQInfo *pQInfo) {
       pQInfo->groupIndex = currentGroupIndex;  // restore the group index
       assert(pQuery->rec.rows == pWindowResInfo->size);
 
-      clearClosedTimeWindow(pRuntimeEnv);
+      clearClosedResultRows(pRuntimeEnv, &pRuntimeEnv->windowResInfo);
       break;
     }
   } else if (pRuntimeEnv->queryWindowIdentical && pRuntimeEnv->pTSBuf == NULL && !isTSCompQuery(pQuery)) {
@@ -5641,7 +5634,7 @@ static void sequentialTableProcess(SQInfo *pQInfo) {
     }
 
     resetDefaultResInfoOutputBuf(pRuntimeEnv);
-    resetTimeWindowInfo(pRuntimeEnv, &pRuntimeEnv->windowResInfo);
+    resetResultRowInfo(pRuntimeEnv, &pRuntimeEnv->windowResInfo);
 
     SArray *group = GET_TABLEGROUP(pQInfo, 0);
     assert(taosArrayGetSize(group) == pQInfo->tableqinfoGroupInfo.numOfTables &&
@@ -5796,11 +5789,11 @@ static void doCloseAllTimeWindowAfterScan(SQInfo *pQInfo) {
       size_t num = taosArrayGetSize(group);
       for (int32_t j = 0; j < num; ++j) {
         STableQueryInfo* item = taosArrayGetP(group, j);
-        closeAllTimeWindow(&item->windowResInfo);
+        closeAllResultRows(&item->windowResInfo);
       }
     }
   } else {  // close results for group result
-    closeAllTimeWindow(&pQInfo->runtimeEnv.windowResInfo);
+    closeAllResultRows(&pQInfo->runtimeEnv.windowResInfo);
   }
 }
 
@@ -6048,10 +6041,10 @@ static void tableIntervalProcessImpl(SQueryRuntimeEnv *pRuntimeEnv, TSKEY start)
     if ((pQuery->numOfFilterCols > 0 || pRuntimeEnv->pTSBuf != NULL) && pQuery->limit.offset > 0 &&
         pQuery->fillType == TSDB_FILL_NONE) {
       // maxOutput <= 0, means current query does not generate any results
-      int32_t numOfClosed = numOfClosedTimeWindow(&pRuntimeEnv->windowResInfo);
+      int32_t numOfClosed = numOfClosedResultRows(&pRuntimeEnv->windowResInfo);
 
       int32_t c = (int32_t)(MIN(numOfClosed, pQuery->limit.offset));
-      clearFirstNWindowRes(pRuntimeEnv, c);
+      popFrontResultRow(pRuntimeEnv, &pRuntimeEnv->windowResInfo, c);
       pQuery->limit.offset -= c;
     }
 
@@ -6088,7 +6081,7 @@ static void tableIntervalProcess(SQInfo *pQInfo, STableQueryInfo* pTableInfo) {
       pQuery->rec.rows = 0;
       copyFromWindowResToSData(pQInfo, &pRuntimeEnv->windowResInfo);
 
-      clearFirstNWindowRes(pRuntimeEnv, pQInfo->groupIndex);
+      popFrontResultRow(pRuntimeEnv, &pRuntimeEnv->windowResInfo, pQInfo->groupIndex);
     }
 
     // no result generated, abort
@@ -6121,16 +6114,16 @@ static void tableIntervalProcess(SQInfo *pQInfo, STableQueryInfo* pTableInfo) {
   // all data scanned, the group by normal column can return
   if (pRuntimeEnv->groupbyNormalCol) {  // todo refactor with merge interval time result
     // maxOutput <= 0, means current query does not generate any results
-    int32_t numOfClosed = numOfClosedTimeWindow(&pRuntimeEnv->windowResInfo);
+    int32_t numOfClosed = numOfClosedResultRows(&pRuntimeEnv->windowResInfo);
 
     if ((pQuery->limit.offset > 0 && pQuery->limit.offset < numOfClosed) || pQuery->limit.offset == 0) {
       // skip offset result rows
-      clearFirstNWindowRes(pRuntimeEnv, (int32_t) pQuery->limit.offset);
+      popFrontResultRow(pRuntimeEnv, &pRuntimeEnv->windowResInfo, (int32_t) pQuery->limit.offset);
 
       pQuery->rec.rows   = 0;
       pQInfo->groupIndex = 0;
       copyFromWindowResToSData(pQInfo, &pRuntimeEnv->windowResInfo);
-      clearFirstNWindowRes(pRuntimeEnv, pQInfo->groupIndex);
+      popFrontResultRow(pRuntimeEnv, &pRuntimeEnv->windowResInfo, pQInfo->groupIndex);
 
       doSecondaryArithmeticProcess(pQuery);
       limitResults(pRuntimeEnv);
@@ -6164,7 +6157,7 @@ static void tableQueryImpl(SQInfo *pQInfo) {
 
       if (pRuntimeEnv->windowResInfo.size > 0) {
         copyFromWindowResToSData(pQInfo, &pRuntimeEnv->windowResInfo);
-        clearFirstNWindowRes(pRuntimeEnv, pQInfo->groupIndex);
+        popFrontResultRow(pRuntimeEnv, &pRuntimeEnv->windowResInfo, pQInfo->groupIndex);
 
         if (pQuery->rec.rows > 0) {
           qDebug("QInfo:%p %"PRId64" rows returned from group results, total:%"PRId64"", pQInfo, pQuery->rec.rows, pQuery->rec.total);
@@ -7029,7 +7022,7 @@ static SQInfo *createQInfoImpl(SQueryTableMsg *pQueryMsg, SSqlGroupbyExpr *pGrou
 
   pQInfo->runtimeEnv.pResultRowHashTable = taosHashInit(pTableGroupInfo->numOfTables, taosGetDefaultHashFunction(TSDB_DATA_TYPE_BINARY), true, HASH_NO_LOCK);
   pQInfo->runtimeEnv.keyBuf = malloc(TSDB_MAX_BYTES_PER_ROW);
-  pQInfo->runtimeEnv.pool = initResultRowPool(getWindowResultSize(&pQInfo->runtimeEnv));
+  pQInfo->runtimeEnv.pool = initResultRowPool(getResultRowSize(&pQInfo->runtimeEnv));
   pQInfo->runtimeEnv.prevRow = malloc(POINTER_BYTES * pQuery->numOfCols + srcSize);
 
   char* start = POINTER_BYTES * pQuery->numOfCols + (char*) pQInfo->runtimeEnv.prevRow;
diff --git a/src/query/src/qUtil.c b/src/query/src/qUtil.c
index 6c845b012f..65ac60e91f 100644
--- a/src/query/src/qUtil.c
+++ b/src/query/src/qUtil.c
@@ -43,7 +43,7 @@ int32_t getOutputInterResultBufSize(SQuery* pQuery) {
   return size;
 }
 
-int32_t initWindowResInfo(SResultRowInfo *pResultRowInfo, int32_t size, int16_t type) {
+int32_t initResultRowInfo(SResultRowInfo *pResultRowInfo, int32_t size, int16_t type) {
   pResultRowInfo->capacity = size;
 
   pResultRowInfo->type = type;
@@ -59,10 +59,11 @@ int32_t initWindowResInfo(SResultRowInfo *pResultRowInfo, int32_t size, int16_t
   return TSDB_CODE_SUCCESS;
 }
 
-void cleanupTimeWindowInfo(SResultRowInfo *pResultRowInfo) {
+void cleanupResultRowInfo(SResultRowInfo *pResultRowInfo) {
   if (pResultRowInfo == NULL) {
     return;
   }
+
   if (pResultRowInfo->capacity == 0) {
     assert(pResultRowInfo->pResult == NULL);
     return;
@@ -77,7 +78,7 @@ void cleanupTimeWindowInfo(SResultRowInfo *pResultRowInfo) {
   tfree(pResultRowInfo->pResult);
 }
 
-void resetTimeWindowInfo(SQueryRuntimeEnv *pRuntimeEnv, SResultRowInfo *pResultRowInfo) {
+void resetResultRowInfo(SQueryRuntimeEnv *pRuntimeEnv, SResultRowInfo *pResultRowInfo) {
   if (pResultRowInfo == NULL || pResultRowInfo->capacity == 0) {
     return;
   }
@@ -100,13 +101,12 @@ void resetTimeWindowInfo(SQueryRuntimeEnv *pRuntimeEnv, SResultRowInfo *pResultR
   pResultRowInfo->prevSKey = TSKEY_INITIAL_VAL;
 }
 
-void clearFirstNWindowRes(SQueryRuntimeEnv *pRuntimeEnv, int32_t num) {
-  SResultRowInfo *pResultRowInfo = &pRuntimeEnv->windowResInfo;
+void popFrontResultRow(SQueryRuntimeEnv *pRuntimeEnv, SResultRowInfo *pResultRowInfo, int32_t num) {
   if (pResultRowInfo == NULL || pResultRowInfo->capacity == 0 || pResultRowInfo->size == 0 || num == 0) {
     return;
   }
   
-  int32_t numOfClosed = numOfClosedTimeWindow(pResultRowInfo);
+  int32_t numOfClosed = numOfClosedResultRows(pResultRowInfo);
   assert(num >= 0 && num <= numOfClosed);
 
   int16_t type = pResultRowInfo->type;
@@ -159,17 +159,16 @@ void clearFirstNWindowRes(SQueryRuntimeEnv *pRuntimeEnv, int32_t num) {
   pResultRowInfo->curIndex = -1;
 }
 
-void clearClosedTimeWindow(SQueryRuntimeEnv *pRuntimeEnv) {
-  SResultRowInfo *pResultRowInfo = &pRuntimeEnv->windowResInfo;
+void clearClosedResultRows(SQueryRuntimeEnv *pRuntimeEnv, SResultRowInfo *pResultRowInfo) {
   if (pResultRowInfo == NULL || pResultRowInfo->capacity == 0 || pResultRowInfo->size == 0) {
     return;
   }
   
-  int32_t numOfClosed = numOfClosedTimeWindow(pResultRowInfo);
-  clearFirstNWindowRes(pRuntimeEnv, numOfClosed);
+  int32_t numOfClosed = numOfClosedResultRows(pResultRowInfo);
+  popFrontResultRow(pRuntimeEnv, &pRuntimeEnv->windowResInfo, numOfClosed);
 }
 
-int32_t numOfClosedTimeWindow(SResultRowInfo *pResultRowInfo) {
+int32_t numOfClosedResultRows(SResultRowInfo *pResultRowInfo) {
   int32_t i = 0;
   while (i < pResultRowInfo->size && pResultRowInfo->pResult[i]->closed) {
     ++i;
@@ -178,7 +177,7 @@ int32_t numOfClosedTimeWindow(SResultRowInfo *pResultRowInfo) {
   return i;
 }
 
-void closeAllTimeWindow(SResultRowInfo *pResultRowInfo) {
+void closeAllResultRows(SResultRowInfo *pResultRowInfo) {
   assert(pResultRowInfo->size >= 0 && pResultRowInfo->capacity >= pResultRowInfo->size);
   
   for (int32_t i = 0; i < pResultRowInfo->size; ++i) {
@@ -195,7 +194,7 @@ void closeAllTimeWindow(SResultRowInfo *pResultRowInfo) {
  * the last qualified time stamp in case of sliding query, which the sliding time is not equalled to the interval time.
  * NOTE: remove redundant, only when the result set order equals to traverse order
  */
-void removeRedundantWindow(SResultRowInfo *pResultRowInfo, TSKEY lastKey, int32_t order) {
+void removeRedundantResultRows(SResultRowInfo *pResultRowInfo, TSKEY lastKey, int32_t order) {
   assert(pResultRowInfo->size >= 0 && pResultRowInfo->capacity >= pResultRowInfo->size);
   if (pResultRowInfo->size <= 1) {
     return;
@@ -224,27 +223,27 @@ void removeRedundantWindow(SResultRowInfo *pResultRowInfo, TSKEY lastKey, int32_
   }
 }
 
-bool isWindowResClosed(SResultRowInfo *pResultRowInfo, int32_t slot) {
+bool isResultRowClosed(SResultRowInfo *pResultRowInfo, int32_t slot) {
   return (getResultRow(pResultRowInfo, slot)->closed == true);
 }
 
-void closeTimeWindow(SResultRowInfo *pResultRowInfo, int32_t slot) {
+void closeResultRow(SResultRowInfo *pResultRowInfo, int32_t slot) {
   getResultRow(pResultRowInfo, slot)->closed = true;
 }
 
-void clearResultRow(SQueryRuntimeEnv *pRuntimeEnv, SResultRow *pWindowRes, int16_t type) {
-  if (pWindowRes == NULL) {
+void clearResultRow(SQueryRuntimeEnv *pRuntimeEnv, SResultRow *pResultRow, int16_t type) {
+  if (pResultRow == NULL) {
     return;
   }
 
   // the result does not put into the SDiskbasedResultBuf, ignore it.
-  if (pWindowRes->pageId >= 0) {
-    tFilePage *page = getResBufPage(pRuntimeEnv->pResultBuf, pWindowRes->pageId);
+  if (pResultRow->pageId >= 0) {
+    tFilePage *page = getResBufPage(pRuntimeEnv->pResultBuf, pResultRow->pageId);
 
     for (int32_t i = 0; i < pRuntimeEnv->pQuery->numOfOutput; ++i) {
-      SResultRowCellInfo *pResultInfo = &pWindowRes->pCellInfo[i];
+      SResultRowCellInfo *pResultInfo = &pResultRow->pCellInfo[i];
 
-      char * s = getPosInResultPage(pRuntimeEnv, i, pWindowRes, page);
+      char * s = getPosInResultPage(pRuntimeEnv, i, pResultRow, page);
       size_t size = pRuntimeEnv->pQuery->pExpr1[i].bytes;
       memset(s, 0, size);
 
@@ -252,15 +251,15 @@ void clearResultRow(SQueryRuntimeEnv *pRuntimeEnv, SResultRow *pWindowRes, int16
     }
   }
 
-  pWindowRes->numOfRows = 0;
-  pWindowRes->pageId = -1;
-  pWindowRes->rowId = -1;
-  pWindowRes->closed = false;
+  pResultRow->numOfRows = 0;
+  pResultRow->pageId = -1;
+  pResultRow->rowId = -1;
+  pResultRow->closed = false;
 
   if (type == TSDB_DATA_TYPE_BINARY || type == TSDB_DATA_TYPE_NCHAR) {
-    tfree(pWindowRes->key);
+    tfree(pResultRow->key);
   } else {
-    pWindowRes->win = TSWINDOW_INITIALIZER;
+    pResultRow->win = TSWINDOW_INITIALIZER;
   }
 }
 
@@ -310,7 +309,7 @@ SResultRowCellInfo* getResultCell(SQueryRuntimeEnv* pRuntimeEnv, const SResultRo
   return (SResultRowCellInfo*)((char*) pRow->pCellInfo + pRuntimeEnv->rowCellInfoOffset[index]);
 }
 
-size_t getWindowResultSize(SQueryRuntimeEnv* pRuntimeEnv) {
+size_t getResultRowSize(SQueryRuntimeEnv* pRuntimeEnv) {
   return (pRuntimeEnv->pQuery->numOfOutput * sizeof(SResultRowCellInfo)) + pRuntimeEnv->interBufSize + sizeof(SResultRow);
 }
 
diff --git a/tests/script/general/parser/fill.sim b/tests/script/general/parser/fill.sim
index 9851a4e7fc..405a805312 100644
--- a/tests/script/general/parser/fill.sim
+++ b/tests/script/general/parser/fill.sim
@@ -848,10 +848,7 @@ if $rows != 12 then
   return -1
 endi
 
-print =====================>td-1442
-sql_error select count(*) from m_fl_tb0 interval(1s) fill(prev);
-
-print =====================> aggregation + arithmetic + fill
+print =====================> aggregation + arithmetic + fill, need to add cases TODO
 #sql select avg(cpu_taosd) - first(cpu_taosd) from dn1 where ts<'2020-11-13 11:00:00' and ts>'2020-11-13 10:50:00' interval(10s) fill(value, 99)
 #sql select count(*), first(k), avg(k), avg(k)-first(k) from tm0 where ts>'2020-1-1 1:1:1' and ts<'2020-1-1 1:02:59' interval(10s) fill(value, 99);
 #sql select count(*), first(k), avg(k), avg(k)-first(k) from tm0 where ts>'2020-1-1 1:1:1' and ts<'2020-1-1 1:02:59' interval(10s) fill(NULL);
@@ -1044,6 +1041,17 @@ if $data12 != 1 then
   return -1
 endi
 
+print =====================>td-1442, td-2190 , no time range for fill option
+sql_error select count(*) from m_fl_tb0 interval(1s) fill(prev);
+
+sql_error select min(c3) from m_fl_mt0 interval(10a) fill(value, 20)
+sql_error select min(c3) from m_fl_mt0 interval(10s) fill(value, 20)
+sql_error select min(c3) from m_fl_mt0 interval(10m) fill(value, 20)
+sql_error select min(c3) from m_fl_mt0 interval(10h) fill(value, 20)
+sql_error select min(c3) from m_fl_mt0 interval(10d) fill(value, 20)
+sql_error select min(c3) from m_fl_mt0 interval(10w) fill(value, 20)
+sql_error select max(c3) from m_fl_mt0 interval(1n) fill(prev)
+sql_error select min(c3) from m_fl_mt0 interval(1y) fill(value, 20)
 
 print =============== clear
 #sql drop database $db