Merge pull request #6816 from taosdata/feature/query

[td-5126]<enhance>:improve the nest query performance.

src/query/inc/qExecutor.h

@@ -277,6 +277,7 @@ typedef struct SQueryRuntimeEnv {
   bool                  enableGroupData;
   SDiskbasedResultBuf*  pResultBuf;       // query result buffer based on blocked-wised disk file
   SHashObj*             pResultRowHashTable; // quick locate the window object for each result
+  SHashObj*             pResultRowListSet;   // used to check if current ResultRowInfo has ResultRow object or not
   char*                 keyBuf;           // window key buffer
   SResultRowPool*       pool;             // window result object pool
   char**                prevRow;

src/query/src/qExecutor.c

@@ -410,25 +410,25 @@ static void prepareResultListBuffer(SResultRowInfo* pResultRowInfo, SQueryRuntim
   pResultRowInfo->capacity = (int32_t)newCapacity;
 }
 
-static int32_t ascResultRowCompareFn(const void* p1, const void* p2) {
-  SResultRow* pRow1 = *(SResultRow**)p1;
-  SResultRow* pRow2 = *(SResultRow**)p2;
-
-  if (pRow1 == pRow2) {
-    return 0;
-  } else {
-    return pRow1->win.skey < pRow2->win.skey? -1:1;
-  }
-}
+//static int32_t ascResultRowCompareFn(const void* p1, const void* p2) {
+//  SResultRow* pRow1 = *(SResultRow**)p1;
+//  SResultRow* pRow2 = *(SResultRow**)p2;
+//
+//  if (pRow1 == pRow2) {
+//    return 0;
+//  } else {
+//    return pRow1->win.skey < pRow2->win.skey? -1:1;
+//  }
+//}
 
-static int32_t descResultRowCompareFn(const void* p1, const void* p2) {
-  return -ascResultRowCompareFn(p1, p2);
-}
+//static int32_t descResultRowCompareFn(const void* p1, const void* p2) {
+//  return -ascResultRowCompareFn(p1, p2);
+//}
 
-static SResultRow *doPrepareResultRowFromKey(SQueryRuntimeEnv *pRuntimeEnv, SResultRowInfo *pResultRowInfo, char *pData,
-                                             int16_t bytes, bool masterscan, uint64_t uid) {
+static SResultRow *doPrepareResultRowFromKey(SQueryRuntimeEnv *pRuntimeEnv, SResultRowInfo *pResultRowInfo, int64_t tid, char *pData,
+                                             int16_t bytes, bool masterscan, uint64_t tableGroupId) {
   bool existed = false;
-  SET_RES_WINDOW_KEY(pRuntimeEnv->keyBuf, pData, bytes, uid);
+  SET_RES_WINDOW_KEY(pRuntimeEnv->keyBuf, pData, bytes, tableGroupId);
 
   SResultRow **p1 =
       (SResultRow **)taosHashGet(pRuntimeEnv->pResultRowHashTable, pRuntimeEnv->keyBuf, GET_RES_WINDOW_KEY_LEN(bytes));
@@ -446,16 +446,20 @@ static SResultRow *doPrepareResultRowFromKey(SQueryRuntimeEnv *pRuntimeEnv, SRes
         existed = false;
       } else if (pResultRowInfo->size == 1) {
         existed = (pResultRowInfo->pResult[0] == (*p1));
-      } else {
-        __compar_fn_t fn = QUERY_IS_ASC_QUERY(pRuntimeEnv->pQueryAttr)? ascResultRowCompareFn:descResultRowCompareFn;
-        void* ptr = taosbsearch(p1, pResultRowInfo->pResult, pResultRowInfo->size, POINTER_BYTES, fn, TD_EQ);
-        if (ptr != NULL) {
-          existed = true;
-        }
+      } else {  // check if current pResultRowInfo contains the existed pResultRow
+        SET_RES_WINDOW_KEY(pRuntimeEnv->keyBuf, pData, bytes, tid);
+        void* ptr = taosHashGet(pRuntimeEnv->pResultRowListSet, pRuntimeEnv->keyBuf, GET_RES_WINDOW_KEY_LEN(bytes));
+        existed = (ptr != NULL);
+//        __compar_fn_t fn = QUERY_IS_ASC_QUERY(pRuntimeEnv->pQueryAttr)? ascResultRowCompareFn:descResultRowCompareFn;
+//        void* ptr = taosbsearch(p1, pResultRowInfo->pResult, pResultRowInfo->size, POINTER_BYTES, fn, TD_EQ);
+//        if (ptr != NULL) {
+//          existed = true;
+//        }
       }
     }
   } else {
-    if (p1 != NULL) {  // group by column query
+    // In case of group by column query, the required SResultRow object must be existed in the pResultRowInfo object.
+    if (p1 != NULL) {
       return *p1;
     }
   }
@@ -479,6 +483,10 @@ static SResultRow *doPrepareResultRowFromKey(SQueryRuntimeEnv *pRuntimeEnv, SRes
 
     pResultRowInfo->pResult[pResultRowInfo->size++] = pResult;
     pResultRowInfo->current = pResult;
+
+    int64_t dummyVal = 0;
+    SET_RES_WINDOW_KEY(pRuntimeEnv->keyBuf, pData, bytes, tid);
+    taosHashPut(pRuntimeEnv->pResultRowListSet, pRuntimeEnv->keyBuf, GET_RES_WINDOW_KEY_LEN(bytes), &dummyVal, POINTER_BYTES);
   }
 
   // too many time window in query
@@ -614,13 +622,13 @@ static int32_t addNewWindowResultBuf(SResultRow *pWindowRes, SDiskbasedResultBuf
   return 0;
 }
 
-static int32_t setWindowOutputBufByKey(SQueryRuntimeEnv *pRuntimeEnv, SResultRowInfo *pResultRowInfo, STimeWindow *win,
-                                       bool masterscan, SResultRow **pResult, int64_t groupId, SQLFunctionCtx* pCtx,
+static int32_t setWindowOutputBufByKey(SQueryRuntimeEnv *pRuntimeEnv, SResultRowInfo *pResultRowInfo, int64_t tid, STimeWindow *win,
+                                       bool masterscan, SResultRow **pResult, int64_t tableGroupId, SQLFunctionCtx* pCtx,
                                        int32_t numOfOutput, int32_t* rowCellInfoOffset) {
   assert(win->skey <= win->ekey);
   SDiskbasedResultBuf *pResultBuf = pRuntimeEnv->pResultBuf;
 
-  SResultRow *pResultRow = doPrepareResultRowFromKey(pRuntimeEnv, pResultRowInfo, (char *)&win->skey, TSDB_KEYSIZE, masterscan, groupId);
+  SResultRow *pResultRow = doPrepareResultRowFromKey(pRuntimeEnv, pResultRowInfo, tid, (char *)&win->skey, TSDB_KEYSIZE, masterscan, tableGroupId);
   if (pResultRow == NULL) {
     *pResult = NULL;
     return TSDB_CODE_SUCCESS;
@@ -628,7 +636,7 @@ static int32_t setWindowOutputBufByKey(SQueryRuntimeEnv *pRuntimeEnv, SResultRow
 
   // not assign result buffer yet, add new result buffer
   if (pResultRow->pageId == -1) {
-    int32_t ret = addNewWindowResultBuf(pResultRow, pResultBuf, (int32_t) groupId, pRuntimeEnv->pQueryAttr->intermediateResultRowSize);
+    int32_t ret = addNewWindowResultBuf(pResultRow, pResultBuf, (int32_t) tableGroupId, pRuntimeEnv->pQueryAttr->intermediateResultRowSize);
     if (ret != TSDB_CODE_SUCCESS) {
       return -1;
     }
@@ -1247,7 +1255,7 @@ static void doWindowBorderInterpolation(SOperatorInfo* pOperatorInfo, SSDataBloc
   }
 }
 
-static void hashIntervalAgg(SOperatorInfo* pOperatorInfo, SResultRowInfo* pResultRowInfo, SSDataBlock* pSDataBlock, int32_t groupId) {
+static void hashIntervalAgg(SOperatorInfo* pOperatorInfo, SResultRowInfo* pResultRowInfo, SSDataBlock* pSDataBlock, int32_t tableGroupId) {
   STableIntervalOperatorInfo* pInfo = (STableIntervalOperatorInfo*) pOperatorInfo->info;
 
   SQueryRuntimeEnv* pRuntimeEnv = pOperatorInfo->pRuntimeEnv;
@@ -1275,7 +1283,7 @@ static void hashIntervalAgg(SOperatorInfo* pOperatorInfo, SResultRowInfo* pResul
   bool masterScan = IS_MASTER_SCAN(pRuntimeEnv);
 
   SResultRow* pResult = NULL;
-  int32_t ret = setWindowOutputBufByKey(pRuntimeEnv, pResultRowInfo, &win, masterScan, &pResult, groupId, pInfo->pCtx,
+  int32_t ret = setWindowOutputBufByKey(pRuntimeEnv, pResultRowInfo, pSDataBlock->info.tid, &win, masterScan, &pResult, tableGroupId, pInfo->pCtx,
                                         numOfOutput, pInfo->rowCellInfoOffset);
   if (ret != TSDB_CODE_SUCCESS || pResult == NULL) {
     longjmp(pRuntimeEnv->env, TSDB_CODE_QRY_OUT_OF_MEMORY);
@@ -1304,7 +1312,7 @@ static void hashIntervalAgg(SOperatorInfo* pOperatorInfo, SResultRowInfo* pResul
       }
 
       STimeWindow w = pRes->win;
-      ret = setWindowOutputBufByKey(pRuntimeEnv, pResultRowInfo, &w, masterScan, &pResult, groupId, pInfo->pCtx,
+      ret = setWindowOutputBufByKey(pRuntimeEnv, pResultRowInfo, pSDataBlock->info.tid, &w, masterScan, &pResult, tableGroupId, pInfo->pCtx,
                                     numOfOutput, pInfo->rowCellInfoOffset);
       if (ret != TSDB_CODE_SUCCESS) {
         longjmp(pRuntimeEnv->env, TSDB_CODE_QRY_OUT_OF_MEMORY);
@@ -1322,7 +1330,7 @@ static void hashIntervalAgg(SOperatorInfo* pOperatorInfo, SResultRowInfo* pResul
     }
 
     // restore current time window
-    ret = setWindowOutputBufByKey(pRuntimeEnv, pResultRowInfo, &win, masterScan, &pResult, groupId, pInfo->pCtx,
+    ret = setWindowOutputBufByKey(pRuntimeEnv, pResultRowInfo, pSDataBlock->info.tid, &win, masterScan, &pResult, tableGroupId, pInfo->pCtx,
                                   numOfOutput, pInfo->rowCellInfoOffset);
     if (ret != TSDB_CODE_SUCCESS) {
       longjmp(pRuntimeEnv->env, TSDB_CODE_QRY_OUT_OF_MEMORY);
@@ -1342,7 +1350,7 @@ static void hashIntervalAgg(SOperatorInfo* pOperatorInfo, SResultRowInfo* pResul
     }
 
     // null data, failed to allocate more memory buffer
-    int32_t code = setWindowOutputBufByKey(pRuntimeEnv, pResultRowInfo, &nextWin, masterScan, &pResult, groupId,
+    int32_t code = setWindowOutputBufByKey(pRuntimeEnv, pResultRowInfo, pSDataBlock->info.tid, &nextWin, masterScan, &pResult, tableGroupId,
                                            pInfo->pCtx, numOfOutput, pInfo->rowCellInfoOffset);
     if (code != TSDB_CODE_SUCCESS || pResult == NULL) {
       longjmp(pRuntimeEnv->env, TSDB_CODE_QRY_OUT_OF_MEMORY);
@@ -1483,7 +1491,7 @@ static void doSessionWindowAggImpl(SOperatorInfo* pOperator, SSWindowOperatorInf
       SResultRow* pResult = NULL;
 
       pInfo->curWindow.ekey = pInfo->curWindow.skey;
-      int32_t ret = setWindowOutputBufByKey(pRuntimeEnv, &pBInfo->resultRowInfo, &pInfo->curWindow, masterScan,
+      int32_t ret = setWindowOutputBufByKey(pRuntimeEnv, &pBInfo->resultRowInfo, pSDataBlock->info.tid, &pInfo->curWindow, masterScan,
                                             &pResult, item->groupIndex, pBInfo->pCtx, pOperator->numOfOutput,
                                             pBInfo->rowCellInfoOffset);
       if (ret != TSDB_CODE_SUCCESS) {  // null data, too many state code
@@ -1504,7 +1512,7 @@ static void doSessionWindowAggImpl(SOperatorInfo* pOperator, SSWindowOperatorInf
   SResultRow* pResult = NULL;
 
   pInfo->curWindow.ekey = pInfo->curWindow.skey;
-  int32_t ret = setWindowOutputBufByKey(pRuntimeEnv, &pBInfo->resultRowInfo, &pInfo->curWindow, masterScan,
+  int32_t ret = setWindowOutputBufByKey(pRuntimeEnv, &pBInfo->resultRowInfo, pSDataBlock->info.tid, &pInfo->curWindow, masterScan,
                                         &pResult, item->groupIndex, pBInfo->pCtx, pOperator->numOfOutput,
                                         pBInfo->rowCellInfoOffset);
   if (ret != TSDB_CODE_SUCCESS) {  // null data, too many state code
@@ -1547,7 +1555,8 @@ static int32_t setGroupResultOutputBuf(SQueryRuntimeEnv *pRuntimeEnv, SOptrBasic
     len = varDataLen(pData);
   }
 
-  SResultRow *pResultRow = doPrepareResultRowFromKey(pRuntimeEnv, pResultRowInfo, d, len, true, groupIndex);
+  int64_t tid = 0;
+  SResultRow *pResultRow = doPrepareResultRowFromKey(pRuntimeEnv, pResultRowInfo, tid, d, len, true, groupIndex);
   assert (pResultRow != NULL);
 
   setResultRowKey(pResultRow, pData, type);
@@ -1811,6 +1820,7 @@ static int32_t setupQueryRuntimeEnv(SQueryRuntimeEnv *pRuntimeEnv, int32_t numOf
   pRuntimeEnv->pQueryAttr = pQueryAttr;
 
   pRuntimeEnv->pResultRowHashTable = taosHashInit(numOfTables, taosGetDefaultHashFunction(TSDB_DATA_TYPE_BINARY), true, HASH_NO_LOCK);
+  pRuntimeEnv->pResultRowListSet = taosHashInit(numOfTables, taosGetDefaultHashFunction(TSDB_DATA_TYPE_BINARY), false, HASH_NO_LOCK);
   pRuntimeEnv->keyBuf  = malloc(pQueryAttr->maxTableColumnWidth + sizeof(int64_t));
   pRuntimeEnv->pool    = initResultRowPool(getResultRowSize(pRuntimeEnv));
 
@@ -2060,6 +2070,9 @@ static void teardownQueryRuntimeEnv(SQueryRuntimeEnv *pRuntimeEnv) {
   taosHashCleanup(pRuntimeEnv->pTableRetrieveTsMap);
   pRuntimeEnv->pTableRetrieveTsMap = NULL;
 
+  taosHashCleanup(pRuntimeEnv->pResultRowListSet);
+  pRuntimeEnv->pResultRowListSet = NULL;
+
   destroyOperatorInfo(pRuntimeEnv->proot);
 
   pRuntimeEnv->pool = destroyResultRowPool(pRuntimeEnv->pool);
@@ -2790,7 +2803,7 @@ int32_t loadDataBlockOnDemand(SQueryRuntimeEnv* pRuntimeEnv, STableScanInfo* pTa
       TSKEY k = ascQuery? pBlock->info.window.skey : pBlock->info.window.ekey;
 
       STimeWindow win = getActiveTimeWindow(pTableScanInfo->pResultRowInfo, k, pQueryAttr);
-      if (setWindowOutputBufByKey(pRuntimeEnv, pTableScanInfo->pResultRowInfo, &win, masterScan, &pResult, groupId,
+      if (setWindowOutputBufByKey(pRuntimeEnv, pTableScanInfo->pResultRowInfo, pBlock->info.tid, &win, masterScan, &pResult, groupId,
                                   pTableScanInfo->pCtx, pTableScanInfo->numOfOutput,
                                   pTableScanInfo->rowCellInfoOffset) != TSDB_CODE_SUCCESS) {
         longjmp(pRuntimeEnv->env, TSDB_CODE_QRY_OUT_OF_MEMORY);
@@ -2836,7 +2849,7 @@ int32_t loadDataBlockOnDemand(SQueryRuntimeEnv* pRuntimeEnv, STableScanInfo* pTa
           TSKEY k = ascQuery? pBlock->info.window.skey : pBlock->info.window.ekey;
 
           STimeWindow win = getActiveTimeWindow(pTableScanInfo->pResultRowInfo, k, pQueryAttr);
-          if (setWindowOutputBufByKey(pRuntimeEnv, pTableScanInfo->pResultRowInfo, &win, masterScan, &pResult, groupId,
+          if (setWindowOutputBufByKey(pRuntimeEnv, pTableScanInfo->pResultRowInfo, pBlock->info.tid, &win, masterScan, &pResult, groupId,
                                       pTableScanInfo->pCtx, pTableScanInfo->numOfOutput,
                                       pTableScanInfo->rowCellInfoOffset) != TSDB_CODE_SUCCESS) {
             longjmp(pRuntimeEnv->env, TSDB_CODE_QRY_OUT_OF_MEMORY);
@@ -3250,8 +3263,8 @@ void setDefaultOutputBuf(SQueryRuntimeEnv *pRuntimeEnv, SOptrBasicInfo *pInfo, i
   int32_t* rowCellInfoOffset     = pInfo->rowCellInfoOffset;
   SResultRowInfo* pResultRowInfo = &pInfo->resultRowInfo;
 
-  int32_t tid = 0;
-  SResultRow* pRow = doPrepareResultRowFromKey(pRuntimeEnv, pResultRowInfo, (char *)&tid, sizeof(tid), true, uid);
+  int64_t tid = 0;
+  SResultRow* pRow = doPrepareResultRowFromKey(pRuntimeEnv, pResultRowInfo, tid, (char *)&tid, sizeof(tid), true, uid);
 
   for (int32_t i = 0; i < pDataBlock->info.numOfCols; ++i) {
     SColumnInfoData* pData = taosArrayGet(pDataBlock->pDataBlock, i);
@@ -3482,10 +3495,13 @@ void setResultRowOutputBufInitCtx(SQueryRuntimeEnv *pRuntimeEnv, SResultRow *pRe
 }
 
 void doSetTableGroupOutputBuf(SQueryRuntimeEnv* pRuntimeEnv, SResultRowInfo* pResultRowInfo, SQLFunctionCtx* pCtx,
-                              int32_t* rowCellInfoOffset, int32_t numOfOutput, int32_t groupIndex) {
+                              int32_t* rowCellInfoOffset, int32_t numOfOutput, int32_t tableGroupId) {
+  // for simple group by query without interval, all the tables belong to one group result.
   int64_t uid = 0;
+  int64_t tid = 0;
+
   SResultRow* pResultRow =
-      doPrepareResultRowFromKey(pRuntimeEnv, pResultRowInfo, (char*)&groupIndex, sizeof(groupIndex), true, uid);
+      doPrepareResultRowFromKey(pRuntimeEnv, pResultRowInfo, tid, (char*)&tableGroupId, sizeof(tableGroupId), true, uid);
   assert (pResultRow != NULL);
 
   /*
@@ -3493,7 +3509,7 @@ void doSetTableGroupOutputBuf(SQueryRuntimeEnv* pRuntimeEnv, SResultRowInfo* pRe
    * all group belong to one result set, and each group result has different group id so set the id to be one
    */
   if (pResultRow->pageId == -1) {
-    int32_t ret = addNewWindowResultBuf(pResultRow, pRuntimeEnv->pResultBuf, groupIndex, pRuntimeEnv->pQueryAttr->resultRowSize);
+    int32_t ret = addNewWindowResultBuf(pResultRow, pRuntimeEnv->pResultBuf, tableGroupId, pRuntimeEnv->pQueryAttr->resultRowSize);
     if (ret != TSDB_CODE_SUCCESS) {
       return;
     }
@@ -3502,20 +3518,20 @@ void doSetTableGroupOutputBuf(SQueryRuntimeEnv* pRuntimeEnv, SResultRowInfo* pRe
   setResultRowOutputBufInitCtx(pRuntimeEnv, pResultRow, pCtx, numOfOutput, rowCellInfoOffset);
 }
 
-void setExecutionContext(SQueryRuntimeEnv* pRuntimeEnv, SOptrBasicInfo* pInfo, int32_t numOfOutput, int32_t groupIndex,
+void setExecutionContext(SQueryRuntimeEnv* pRuntimeEnv, SOptrBasicInfo* pInfo, int32_t numOfOutput, int32_t tableGroupId,
                          TSKEY nextKey) {
   STableQueryInfo *pTableQueryInfo = pRuntimeEnv->current;
 
   // lastKey needs to be updated
   pTableQueryInfo->lastKey = nextKey;
-  if (pRuntimeEnv->prevGroupId != INT32_MIN && pRuntimeEnv->prevGroupId == groupIndex) {
+  if (pRuntimeEnv->prevGroupId != INT32_MIN && pRuntimeEnv->prevGroupId == tableGroupId) {
     return;
   }
 
-  doSetTableGroupOutputBuf(pRuntimeEnv, &pInfo->resultRowInfo, pInfo->pCtx, pInfo->rowCellInfoOffset, numOfOutput, groupIndex);
+  doSetTableGroupOutputBuf(pRuntimeEnv, &pInfo->resultRowInfo, pInfo->pCtx, pInfo->rowCellInfoOffset, numOfOutput, tableGroupId);
 
   // record the current active group id
-  pRuntimeEnv->prevGroupId = groupIndex;
+  pRuntimeEnv->prevGroupId = tableGroupId;
 }
 
 void setResultOutputBuf(SQueryRuntimeEnv *pRuntimeEnv, SResultRow *pResult, SQLFunctionCtx* pCtx,
@@ -5500,7 +5516,7 @@ static void doStateWindowAggImpl(SOperatorInfo* pOperator, SStateWindowOperatorI
     } else {
       SResultRow* pResult = NULL;
       pInfo->curWindow.ekey = pInfo->curWindow.skey;
-      int32_t ret = setWindowOutputBufByKey(pRuntimeEnv, &pBInfo->resultRowInfo, &pInfo->curWindow, masterScan,
+      int32_t ret = setWindowOutputBufByKey(pRuntimeEnv, &pBInfo->resultRowInfo, pSDataBlock->info.tid, &pInfo->curWindow, masterScan,
                                             &pResult, item->groupIndex, pBInfo->pCtx, pOperator->numOfOutput,
                                             pBInfo->rowCellInfoOffset);
       if (ret != TSDB_CODE_SUCCESS) {  // null data, too many state code
@@ -5520,7 +5536,7 @@ static void doStateWindowAggImpl(SOperatorInfo* pOperator, SStateWindowOperatorI
   SResultRow* pResult = NULL;
 
   pInfo->curWindow.ekey = pInfo->curWindow.skey;
-  int32_t ret = setWindowOutputBufByKey(pRuntimeEnv, &pBInfo->resultRowInfo, &pInfo->curWindow, masterScan,
+  int32_t ret = setWindowOutputBufByKey(pRuntimeEnv, &pBInfo->resultRowInfo, pSDataBlock->info.tid, &pInfo->curWindow, masterScan,
                                         &pResult, item->groupIndex, pBInfo->pCtx, pOperator->numOfOutput,
                                         pBInfo->rowCellInfoOffset);
   if (ret != TSDB_CODE_SUCCESS) {  // null data, too many state code

tests/script/general/parser/subInfrom.sim

-system sh/stop_dnodes.sh
-
-system sh/deploy.sh -n dnode1 -i 1
-system sh/cfg.sh -n dnode1 -c walLevel -v 1
-system sh/exec.sh -n dnode1 -s start
-sleep 100
-sql connect
-sleep 100
-
-print ========== sub_in_from.sim
-$i = 0
-
-$dbPrefix = subdb
-$tbPrefix = sub_tb
-$stbPrefix = sub_stb
-$tbNum = 10
-$rowNum = 1000
-$totalNum = $tbNum * $rowNum
-$loops = 200000
-$log = 10000
-$ts0 = 1537146000000
-$delta = 600000
-$i = 0
-$db = $dbPrefix . $i
-$stb = $stbPrefix . $i
-
-sql drop database $db -x step1
-step1:
-sql create database $db cache 16 maxrows 4096 keep 36500
-print ====== create tables
-sql use $db
-sql create table $stb (ts timestamp, c1 int, c2 bigint, c3 float, c4 double, c5 smallint, c6 tinyint, c7 bool, c8 binary(10), c9 nchar(10)) tags(t1 int)
-
-$i = 0
-$ts = $ts0
-$halfNum = $tbNum / 2
-while $i < $halfNum
-  $tbId = $i + $halfNum
-  $tb = $tbPrefix . $i
-  $tb1 = $tbPrefix . $tbId
-  sql create table $tb using $stb tags( $i )
-  sql create table $tb1 using $stb tags( $tbId )
-
-  $x = 0
-  while $x < $rowNum
-    $xs = $x * $delta
-    $ts = $ts0 + $xs
-    $c = $x / 10
-    $c = $c * 10
-    $c = $x - $c
-    $binary = 'binary . $c
-    $binary = $binary . '
-    $nchar = 'nchar . $c
-    $nchar = $nchar . '
-    sql insert into $tb values ( $ts , $c , $c , $c , $c , $c , $c , true, $binary , $nchar )
-    sql insert into $tb1 values ( $ts , $c , NULL , $c , NULL , $c , $c , true, $binary , $nchar )
-    $x = $x + 1
-  endw
-
-  $i = $i + 1
-endw
-print ====== tables created
-
-sql_error select count(*) from (select count(*) from abc.sub_stb0)
-sql_error select val + 20 from (select count(*) from sub_stb0 interval(10h))
-sql_error select abc+20 from (select count(*) from sub_stb0 interval(1s))
-
-sql select count(*) from (select count(*) from sub_stb0 interval(10h))
-if $rows != 1 then
-  return -1
-endi
-
-if $data00 != 18 then
-  print expect 18, actual: $data00
-  return -1
-endi
-
-sql select ts from (select count(*) from sub_stb0 interval(10h))
-if $rows != 18 then
-  return -1
-endi
-
-if $data00 != @18-09-17 04:00:00.000@ then
-  return -1
-endi
-
-if $data01 != @18-09-17 14:00:00.000@ then
-  return -1
-endi
-
-sql select val + 20, val from (select count(*) as val from sub_stb0 interval(10h))
-if $rows != 18 then
-  return -1
-endi
-
-if $data00 != 320.000000 then
-  return -1
-endi
-
-if $data01 != 300 then
-  return -1
-endi
-
-if $data10 != 620 then
-  return -1
-endi
-
-if $data11 != 600 then
-  return -1
-endi
-
-if $data20 != 620 then
-  return -1
-endi
-
-if $data21 != 600 then
-  return -1
-endi
-
-sql select max(val), min(val), max(val) - min(val)  from (select count(*) val from sub_stb0 interval(10h))
-if $rows != 1 then
-  return -1
-endi
-
-if $data00 != 600 then
-  return -1
-endi
-
-if $data01 != 100 then
-  return -1
-endi
-
-if $data02 != 500.000000 then
-  return -1
-endi
-
-sql select first(ts,val),last(ts,val) from (select count(*) val from sub_stb0 interval(10h))
-sql select top(val, 5) from (select count(*) val from sub_stb0 interval(10h))
-sql select diff(val) from (select count(*) val from sub_stb0 interval(10h))
-sql select apercentile(val, 50) from (select count(*) val from sub_stb0 interval(10h))
-
-# not support yet
-sql select percentile(val, 50) from (select count(*) val from sub_stb0 interval(10h))
-sql select stddev(val) from (select count(*) val from sub_stb0 interval(10h))
-
-print ====================>complex query
-