diff --git a/src/client/inc/tscUtil.h b/src/client/inc/tscUtil.h
index 344152f7d4..0b6ae06416 100644
--- a/src/client/inc/tscUtil.h
+++ b/src/client/inc/tscUtil.h
@@ -134,6 +134,7 @@ void tscFieldInfoSetBinExpr(SFieldInfo* pFieldInfo, int32_t index, SSqlFunctionE
 void tscFieldInfoCalOffset(SQueryInfo* pQueryInfo);
 void tscFieldInfoCopy(SFieldInfo* src, SFieldInfo* dst, const int32_t* indexList, int32_t size);
 void tscFieldInfoCopyAll(SFieldInfo* dst, SFieldInfo* src);
+void tscFieldInfoUpdateOffsetForInterResult(SQueryInfo* pQueryInfo);
 
 TAOS_FIELD* tscFieldInfoGetField(SQueryInfo* pQueryInfo, int32_t index);
 int16_t     tscFieldInfoGetOffset(SQueryInfo* pQueryInfo, int32_t index);
diff --git a/src/client/inc/tsclient.h b/src/client/inc/tsclient.h
index 054b2894c5..9657912716 100644
--- a/src/client/inc/tsclient.h
+++ b/src/client/inc/tsclient.h
@@ -468,7 +468,6 @@ int32_t tscToSQLCmd(SSqlObj* pSql, struct SSqlInfo* pInfo);
 extern void *     pVnodeConn;
 extern void *     pTscMgmtConn;
 extern void *     tscCacheHandle;
-extern int32_t    globalCode;
 extern int        slaveIndex;
 extern void *     tscTmr;
 extern void *     tscQhandle;
diff --git a/src/client/src/tscAsync.c b/src/client/src/tscAsync.c
index 99104ed68c..36cd42332b 100644
--- a/src/client/src/tscAsync.c
+++ b/src/client/src/tscAsync.c
@@ -200,7 +200,6 @@ void taos_fetch_rows_a(TAOS_RES *taosa, void (*fp)(void *, TAOS_RES *, int), voi
   SSqlObj *pSql = (SSqlObj *)taosa;
   if (pSql == NULL || pSql->signature != pSql) {
     tscError("sql object is NULL");
-//    globalCode = TSDB_CODE_DISCONNECTED;
     tscQueueAsyncError(fp, param, TSDB_CODE_DISCONNECTED);
     return;
   }
@@ -232,7 +231,6 @@ void taos_fetch_row_a(TAOS_RES *taosa, void (*fp)(void *, TAOS_RES *, TAOS_ROW),
   SSqlObj *pSql = (SSqlObj *)taosa;
   if (pSql == NULL || pSql->signature != pSql) {
     tscError("sql object is NULL");
-//    globalCode = TSDB_CODE_DISCONNECTED;
     tscQueueAsyncError(fp, param, TSDB_CODE_DISCONNECTED);
     return;
   }
diff --git a/src/client/src/tscLocal.c b/src/client/src/tscLocal.c
index 42b04d7a16..1c738ecb3d 100644
--- a/src/client/src/tscLocal.c
+++ b/src/client/src/tscLocal.c
@@ -343,10 +343,10 @@ static int tscBuildMetricTagProjectionResult(SSqlObj *pSql) {
 }
 
 static int tscBuildMetricTagSqlFunctionResult(SSqlObj *pSql) {
-  SSqlCmd *pCmd = &pSql->cmd;
-  SSqlRes *pRes = &pSql->res;
+//  SSqlCmd *pCmd = &pSql->cmd;
+//  SSqlRes *pRes = &pSql->res;
 
-  SQueryInfo* pQueryInfo = tscGetQueryInfoDetail(pCmd, 0);
+//  SQueryInfo* pQueryInfo = tscGetQueryInfoDetail(pCmd, 0);
 #if 0
   SSuperTableMeta *pMetricMeta = tscGetMetaInfo(pQueryInfo, 0)->pMetricMeta;
   int32_t      totalNumOfResults = 1;  // count function only produce one result
diff --git a/src/client/src/tscPrepare.c b/src/client/src/tscPrepare.c
index 8b065fcf51..caa14d082b 100644
--- a/src/client/src/tscPrepare.c
+++ b/src/client/src/tscPrepare.c
@@ -467,14 +467,14 @@ static int insertStmtExecute(STscStmt* stmt) {
 TAOS_STMT* taos_stmt_init(TAOS* taos) {
   STscObj* pObj = (STscObj*)taos;
   if (pObj == NULL || pObj->signature != pObj) {
-    globalCode = TSDB_CODE_DISCONNECTED;
+    terrno = TSDB_CODE_DISCONNECTED;
     tscError("connection disconnected");
     return NULL;
   }
 
   STscStmt* pStmt = calloc(1, sizeof(STscStmt));
   if (pStmt == NULL) {
-    globalCode = TSDB_CODE_CLI_OUT_OF_MEMORY;
+    terrno = TSDB_CODE_CLI_OUT_OF_MEMORY;
     tscError("failed to allocate memory for statement");
     return NULL;
   }
@@ -482,7 +482,7 @@ TAOS_STMT* taos_stmt_init(TAOS* taos) {
   SSqlObj* pSql = calloc(1, sizeof(SSqlObj));
   if (pSql == NULL) {
     free(pStmt);
-    globalCode = TSDB_CODE_CLI_OUT_OF_MEMORY;
+    terrno = TSDB_CODE_CLI_OUT_OF_MEMORY;
     tscError("failed to allocate memory for statement");
     return NULL;
   }
diff --git a/src/client/src/tscSchemaUtil.c b/src/client/src/tscSchemaUtil.c
index 2492352284..b487d5d6db 100644
--- a/src/client/src/tscSchemaUtil.c
+++ b/src/client/src/tscSchemaUtil.c
@@ -131,7 +131,7 @@ bool isValidSchema(struct SSchema* pSchema, int32_t numOfCols) {
 SSchema* tscGetTableColumnSchema(const STableMeta* pTableMeta, int32_t startCol) {
   assert(pTableMeta != NULL);
   
-  SSchema* pSchema = pTableMeta->schema;
+  SSchema* pSchema = (SSchema*) pTableMeta->schema;
 #if 0
   if (pTableMeta->tableType == TSDB_CHILD_TABLE) {
     assert (pTableMeta->pSTable != NULL);
diff --git a/src/client/src/tscServer.c b/src/client/src/tscServer.c
index 87ddd704d2..c5c737f3a8 100644
--- a/src/client/src/tscServer.c
+++ b/src/client/src/tscServer.c
@@ -1420,10 +1420,10 @@ int tscProcessDescribeTableRsp(SSqlObj *pSql) {
 }
 
 int tscProcessTagRetrieveRsp(SSqlObj *pSql) {
-  SSqlCmd *pCmd = &pSql->cmd;
+//  SSqlCmd *pCmd = &pSql->cmd;
 
-  SQueryInfo *    pQueryInfo = tscGetQueryInfoDetail(pCmd, pCmd->clauseIndex);
-  STableMetaInfo *pTableMetaInfo = tscGetMetaInfo(pQueryInfo, 0);
+//  SQueryInfo *    pQueryInfo = tscGetQueryInfoDetail(pCmd, pCmd->clauseIndex);
+//  STableMetaInfo *pTableMetaInfo = tscGetMetaInfo(pQueryInfo, 0);
 
   int32_t numOfRes = 0;
 #if 0
@@ -1569,7 +1569,7 @@ int tscBuildMultiMeterMetaMsg(SSqlObj *pSql, SSqlInfo *pInfo) {
   return pCmd->payloadLen;
 }
 
-static int32_t tscEstimateMetricMetaMsgSize(SSqlCmd *pCmd) {
+static UNUSED_FUNC int32_t tscEstimateMetricMetaMsgSize(SSqlCmd *pCmd) {
   const int32_t defaultSize =
       minMsgSize() + sizeof(SSuperTableMetaMsg) + sizeof(SMgmtHead) + sizeof(int16_t) * TSDB_MAX_TAGS;
   SQueryInfo *pQueryInfo = tscGetQueryInfoDetail(pCmd, 0);
@@ -1884,10 +1884,10 @@ int tscProcessTableMetaRsp(SSqlObj *pSql) {
  *  |...... 1B        1B            4B
  **/
 int tscProcessMultiMeterMetaRsp(SSqlObj *pSql) {
-  uint8_t  ieType;
-  int32_t  totalNum;
-  int32_t  i;
-
+//  uint8_t  ieType;
+//  int32_t  totalNum;
+//  int32_t  i;
+#if 0
   char *rsp = pSql->res.pRsp;
 
   ieType = *rsp;
@@ -1985,6 +1985,8 @@ int tscProcessMultiMeterMetaRsp(SSqlObj *pSql) {
   pSql->res.code = TSDB_CODE_SUCCESS;
   pSql->res.numOfTotal = i;
   tscTrace("%p load multi-metermeta resp complete num:%d", pSql, pSql->res.numOfTotal);
+#endif
+  
   return TSDB_CODE_SUCCESS;
 }
 
@@ -2467,7 +2469,7 @@ int tscGetSTableVgroupInfo(SSqlObj *pSql, int32_t clauseIndex) {
   SSqlCmd *pCmd = &pSql->cmd;
 
   //the query condition is serialized into pCmd->payload, we need to rebuild key for stable meta info in cache.
-  bool required = false;
+//  bool required = false;
 
   SQueryInfo *pQueryInfo = tscGetQueryInfoDetail(pCmd, clauseIndex);
   if (pQueryInfo->pTableMetaInfo[0]->vgroupIdList != NULL) {
diff --git a/src/client/src/tscSql.c b/src/client/src/tscSql.c
index a3cc785876..f6c1fee633 100644
--- a/src/client/src/tscSql.c
+++ b/src/client/src/tscSql.c
@@ -57,17 +57,17 @@ STscObj *taosConnectImpl(const char *ip, const char *user, const char *pass, con
   taos_init();
   
   if (!validUserName(user)) {
-    globalCode = TSDB_CODE_INVALID_ACCT;
+    terrno = TSDB_CODE_INVALID_ACCT;
     return NULL;
   }
 
   if (!validPassword(pass)) {
-    globalCode = TSDB_CODE_INVALID_PASS;
+    terrno = TSDB_CODE_INVALID_PASS;
     return NULL;
   }
 
   if (tscInitRpc(user, pass) != 0) {
-    globalCode = TSDB_CODE_NETWORK_UNAVAIL;
+    terrno = TSDB_CODE_NETWORK_UNAVAIL;
     return NULL;
   }
 
@@ -92,7 +92,7 @@ STscObj *taosConnectImpl(const char *ip, const char *user, const char *pass, con
   
   STscObj *pObj = (STscObj *)calloc(1, sizeof(STscObj));
   if (NULL == pObj) {
-    globalCode = TSDB_CODE_CLI_OUT_OF_MEMORY;
+    terrno = TSDB_CODE_CLI_OUT_OF_MEMORY;
     return NULL;
   }
 
@@ -107,7 +107,7 @@ STscObj *taosConnectImpl(const char *ip, const char *user, const char *pass, con
     /* db name is too long */
     if (len > TSDB_DB_NAME_LEN) {
       free(pObj);
-      globalCode = TSDB_CODE_INVALID_DB;
+      terrno = TSDB_CODE_INVALID_DB;
       return NULL;
     }
 
@@ -122,7 +122,7 @@ STscObj *taosConnectImpl(const char *ip, const char *user, const char *pass, con
 
   SSqlObj *pSql = (SSqlObj *)calloc(1, sizeof(SSqlObj));
   if (NULL == pSql) {
-    globalCode = TSDB_CODE_CLI_OUT_OF_MEMORY;
+    terrno = TSDB_CODE_CLI_OUT_OF_MEMORY;
     free(pObj);
     return NULL;
   }
@@ -140,7 +140,7 @@ STscObj *taosConnectImpl(const char *ip, const char *user, const char *pass, con
 
   pSql->cmd.command = TSDB_SQL_CONNECT;
   if (TSDB_CODE_SUCCESS != tscAllocPayload(&pSql->cmd, TSDB_DEFAULT_PAYLOAD_SIZE)) {
-    globalCode = TSDB_CODE_CLI_OUT_OF_MEMORY;
+    terrno = TSDB_CODE_CLI_OUT_OF_MEMORY;
     free(pSql);
     free(pObj);
     return NULL;
@@ -303,7 +303,7 @@ int taos_query(TAOS *taos, const char *sqlstr) {
 TAOS_RES *taos_use_result(TAOS *taos) {
   STscObj *pObj = (STscObj *)taos;
   if (pObj == NULL || pObj->signature != pObj) {
-    globalCode = TSDB_CODE_DISCONNECTED;
+    terrno = TSDB_CODE_DISCONNECTED;
     return NULL;
   }
 
@@ -535,11 +535,11 @@ static bool tscHashRemainDataInSubqueryResultSet(SSqlObj *pSql) {
         continue;
       }
 
-      SSqlRes *pRes1 = &pSql->pSubs[i]->res;
+//      SSqlRes *pRes1 = &pSql->pSubs[i]->res;
       SSqlCmd *pCmd1 = &pSql->pSubs[i]->cmd;
 
       SQueryInfo *    pQueryInfo1 = tscGetQueryInfoDetail(pCmd1, pCmd1->clauseIndex);
-      STableMetaInfo *pMetaInfo = tscGetMetaInfo(pQueryInfo1, 0);
+//      STableMetaInfo *pMetaInfo = tscGetMetaInfo(pQueryInfo1, 0);
 
       assert(pQueryInfo1->numOfTables == 1);
 
@@ -576,7 +576,7 @@ static bool tscHashRemainDataInSubqueryResultSet(SSqlObj *pSql) {
   return hasData;
 }
 
-static void **tscBuildResFromSubqueries(SSqlObj *pSql) {
+static UNUSED_FUNC void **tscBuildResFromSubqueries(SSqlObj *pSql) {
   SSqlRes *pRes = &pSql->res;
 
   while (1) {
@@ -662,7 +662,7 @@ static void waitForRetrieveRsp(void *param, TAOS_RES *tres, int numOfRows) {
 TAOS_ROW taos_fetch_row(TAOS_RES *res) {
   SSqlObj *pSql = (SSqlObj *)res;
   if (pSql == NULL || pSql->signature != pSql) {
-    globalCode = TSDB_CODE_DISCONNECTED;
+    terrno = TSDB_CODE_DISCONNECTED;
     return NULL;
   }
   
@@ -694,7 +694,7 @@ int taos_fetch_block(TAOS_RES *res, TAOS_ROW *rows) {
   int nRows = 0;
 
   if (pSql == NULL || pSql->signature != pSql) {
-    globalCode = TSDB_CODE_DISCONNECTED;
+    terrno = TSDB_CODE_DISCONNECTED;
     *rows = NULL;
     return 0;
   }
@@ -733,7 +733,7 @@ int taos_select_db(TAOS *taos, const char *db) {
 
   STscObj *pObj = (STscObj *)taos;
   if (pObj == NULL || pObj->signature != pObj) {
-    globalCode = TSDB_CODE_DISCONNECTED;
+    terrno = TSDB_CODE_DISCONNECTED;
     return TSDB_CODE_DISCONNECTED;
   }
 
@@ -1011,7 +1011,7 @@ int taos_print_row(char *str, TAOS_ROW row, TAOS_FIELD *fields, int num_fields)
 int taos_validate_sql(TAOS *taos, const char *sql) {
   STscObj *pObj = (STscObj *)taos;
   if (pObj == NULL || pObj->signature != pObj) {
-    globalCode = TSDB_CODE_DISCONNECTED;
+    terrno = TSDB_CODE_DISCONNECTED;
     return TSDB_CODE_DISCONNECTED;
   }
 
@@ -1143,7 +1143,7 @@ int taos_load_table_info(TAOS *taos, const char *tableNameList) {
 
   STscObj *pObj = (STscObj *)taos;
   if (pObj == NULL || pObj->signature != pObj) {
-    globalCode = TSDB_CODE_DISCONNECTED;
+    terrno = TSDB_CODE_DISCONNECTED;
     return TSDB_CODE_DISCONNECTED;
   }
 
diff --git a/src/client/src/tscSub.c b/src/client/src/tscSub.c
index 9d172d4ea5..fd457a12dd 100644
--- a/src/client/src/tscSub.c
+++ b/src/client/src/tscSub.c
@@ -99,14 +99,14 @@ void tscUpdateSubscriptionProgress(void* sub, int64_t uid, TSKEY ts) {
 static SSub* tscCreateSubscription(STscObj* pObj, const char* topic, const char* sql) {
   SSub* pSub = calloc(1, sizeof(SSub));
   if (pSub == NULL) {
-    globalCode = TSDB_CODE_CLI_OUT_OF_MEMORY;
+    terrno = TSDB_CODE_CLI_OUT_OF_MEMORY;
     tscError("failed to allocate memory for subscription");
     return NULL;
   }
 
   SSqlObj* pSql = calloc(1, sizeof(SSqlObj));
   if (pSql == NULL) {
-    globalCode = TSDB_CODE_CLI_OUT_OF_MEMORY;
+    terrno = TSDB_CODE_CLI_OUT_OF_MEMORY;
     tscError("failed to allocate SSqlObj for subscription");
     goto failed;
   }
@@ -309,7 +309,7 @@ void tscSaveSubscriptionProgress(void* sub) {
 TAOS_SUB *taos_subscribe(TAOS *taos, int restart, const char* topic, const char *sql, TAOS_SUBSCRIBE_CALLBACK fp, void *param, int interval) {
   STscObj* pObj = (STscObj*)taos;
   if (pObj == NULL || pObj->signature != pObj) {
-    globalCode = TSDB_CODE_DISCONNECTED;
+    terrno = TSDB_CODE_DISCONNECTED;
     tscError("connection disconnected");
     return NULL;
   }
diff --git a/src/client/src/tscSubquery.c b/src/client/src/tscSubquery.c
index 1c57287b22..039cc966f0 100644
--- a/src/client/src/tscSubquery.c
+++ b/src/client/src/tscSubquery.c
@@ -279,7 +279,7 @@ int32_t tscLaunchSecondPhaseSubqueries(SSqlObj* pSql) {
     assert(pSubQueryInfo->exprsInfo.numOfExprs == 1); // ts_comp query only requires one resutl columns
     taos_free_result(pPrevSub);
   
-    SSqlObj *pNew = createSubqueryObj(pSql, (int16_t) i, tscJoinQueryCallback, TSDB_SQL_SELECT, pSupporter, NULL);
+    SSqlObj *pNew = createSubqueryObj(pSql, (int16_t) i, tscJoinQueryCallback, pSupporter, TSDB_SQL_SELECT, NULL);
     if (pNew == NULL) {
       tscDestroyJoinSupporter(pSupporter);
       success = false;
@@ -538,7 +538,7 @@ static void joinRetrieveCallback(void* param, TAOS_RES* tres, int numOfRows) {
     }
   
     if (tscNonOrderedProjectionQueryOnSTable(pQueryInfo, 0) && numOfRows == 0) {
-      STableMetaInfo* pTableMetaInfo = tscGetMetaInfo(pQueryInfo, 0);
+//      STableMetaInfo* pTableMetaInfo = tscGetMetaInfo(pQueryInfo, 0);
       assert(pQueryInfo->numOfTables == 1);
 
       // for projection query, need to try next vnode if current vnode is exhausted
@@ -606,7 +606,7 @@ void tscFetchDatablockFromSubquery(SSqlObj* pSql) {
     SSqlRes *pRes = &pSql->pSubs[i]->res;
     SQueryInfo* pQueryInfo = tscGetQueryInfoDetail(&pSql->pSubs[i]->cmd, 0);
   
-    STableMetaInfo *pTableMetaInfo = tscGetMetaInfo(pQueryInfo, 0);
+//    STableMetaInfo *pTableMetaInfo = tscGetMetaInfo(pQueryInfo, 0);
   
     if (tscNonOrderedProjectionQueryOnSTable(pQueryInfo, 0)) {
 //      if (pRes->row >= pRes->numOfRows && pTableMetaInfo->vnodeIndex < pTableMetaInfo->pMetricMeta->numOfVnodes &&
@@ -834,7 +834,7 @@ int32_t tscLaunchJoinSubquery(SSqlObj *pSql, int16_t tableIndex, SJoinSubquerySu
     }
   }
   
-  SSqlObj *pNew = createSubqueryObj(pSql, tableIndex, tscJoinQueryCallback, TSDB_SQL_SELECT, pSupporter, NULL);
+  SSqlObj *pNew = createSubqueryObj(pSql, tableIndex, tscJoinQueryCallback, pSupporter, TSDB_SQL_SELECT, NULL);
   if (pNew == NULL) {
     return TSDB_CODE_CLI_OUT_OF_MEMORY;
   }
@@ -1237,7 +1237,7 @@ static void tscAllDataRetrievedFromDnode(SRetrieveSupport *trsupport, SSqlObj* p
   SQueryInfo *pQueryInfo = tscGetQueryInfoDetail(&pSql->cmd, 0);
   
   // data in from current vnode is stored in cache and disk
-  uint32_t numOfRowsFromSubquery = trsupport->pExtMemBuffer[idx]->numOfTotalElems + trsupport->localBuffer->numOfElems;
+//  uint32_t numOfRowsFromSubquery = trsupport->pExtMemBuffer[idx]->numOfTotalElems + trsupport->localBuffer->numOfElems;
 //    tscTrace("%p sub:%p all data retrieved from ip:%u,vid:%d, numOfRows:%d, orderOfSub:%d", pPObj, pSql, pSvd->ip,
 //             pSvd->vnode, numOfRowsFromSubquery, idx);
   
@@ -1333,7 +1333,7 @@ static void tscRetrieveFromDnodeCallBack(void *param, TAOS_RES *tres, int numOfR
   SSqlRes *   pRes = &pSql->res;
   SQueryInfo *pQueryInfo = tscGetQueryInfoDetail(&pSql->cmd, 0);
   
-  STableMetaInfo *pTableMetaInfo = tscGetMetaInfo(pQueryInfo, 0);
+//  STableMetaInfo *pTableMetaInfo = tscGetMetaInfo(pQueryInfo, 0);
   
 //  SVnodeSidList *vnodeInfo = tscGetVnodeSidList(pTableMetaInfo->pMetricMeta, idx);
 //  SVnodeSidList *vnodeInfo = 0;
@@ -1409,10 +1409,10 @@ void tscRetrieveDataRes(void *param, TAOS_RES *tres, int code) {
   SSqlObj*  pParentSql = trsupport->pParentSqlObj;
   SSqlObj*  pSql = (SSqlObj *)tres;
   
-  STableMetaInfo *pTableMetaInfo = tscGetTableMetaInfoFromCmd(&pSql->cmd, 0, 0);
+//  STableMetaInfo *pTableMetaInfo = tscGetTableMetaInfoFromCmd(&pSql->cmd, 0, 0);
   assert(pSql->cmd.numOfClause == 1 && pSql->cmd.pQueryInfo[0]->numOfTables == 1);
   
-  int32_t idx = pTableMetaInfo->vnodeIndex;
+//  int32_t idx = pTableMetaInfo->vnodeIndex;
   
   SVnodeSidList *vnodeInfo = NULL;
   SVnodeDesc *   pSvd = NULL;
@@ -1459,7 +1459,7 @@ void tscRetrieveDataRes(void *param, TAOS_RES *tres, int code) {
         pState->code = -TSDB_CODE_CLI_OUT_OF_MEMORY;
         trsupport->numOfRetry = MAX_NUM_OF_SUBQUERY_RETRY;
       } else {
-        SQueryInfo *pNewQueryInfo = tscGetQueryInfoDetail(&pNew->cmd, 0);
+//        SQueryInfo *pNewQueryInfo = tscGetQueryInfoDetail(&pNew->cmd, 0);
 //        assert(pNewQueryInfo->pTableMetaInfo[0]->pTableMeta != NULL && pNewQueryInfo->pTableMetaInfo[0]->pMetricMeta != NULL);
         tscProcessSql(pNew);
         return;
diff --git a/src/client/src/tscSystem.c b/src/client/src/tscSystem.c
index ead8c09dec..ea4cf12f9d 100644
--- a/src/client/src/tscSystem.c
+++ b/src/client/src/tscSystem.c
@@ -33,7 +33,6 @@ void *  pVMeterConn;
 void *  pTscMgmtConn;
 void *  pSlaveConn;
 void *  tscCacheHandle;
-int32_t globalCode = 0;
 int     slaveIndex;
 void *  tscTmr;
 void *  tscQhandle;
diff --git a/src/client/src/tscUtil.c b/src/client/src/tscUtil.c
index a56d042ece..0294120ccb 100644
--- a/src/client/src/tscUtil.c
+++ b/src/client/src/tscUtil.c
@@ -819,7 +819,7 @@ void tscCloseTscObj(STscObj* pObj) {
   pObj->signature = NULL;
   SSqlObj* pSql = pObj->pSql;
   if (pSql) {
-    globalCode = pSql->res.code;
+    terrno = pSql->res.code;
   }
   
   taosTmrStopA(&(pObj->pTimer));
@@ -993,20 +993,6 @@ void tscFieldInfoCalOffset(SQueryInfo* pQueryInfo) {
 }
 
 void tscFieldInfoUpdateOffsetForInterResult(SQueryInfo* pQueryInfo) {
-//  SFieldInfo* pFieldInfo = &pQueryInfo->fieldsInfo;
-//  if (pFieldInfo->numOfOutputCols == 0) {
-//    return;
-//  }
-//
-//  pFieldInfo->pOffset[0] = 0;
-//
-//  /*
-//   * the retTypeLen is used to store the intermediate result length
-//   * for potential secondary merge exists
-//   */
-//  for (int32_t i = 1; i < pFieldInfo->numOfOutputCols; ++i) {
-//    pFieldInfo->pOffset[i] = pFieldInfo->pOffset[i - 1] + tscSqlExprGet(pQueryInfo, i - 1)->resBytes;
-//  }
   SSqlExprInfo* pExprInfo = &pQueryInfo->exprsInfo;
   if (pExprInfo->numOfExprs == 0) {
     return;
@@ -2167,7 +2153,7 @@ int16_t tscGetJoinTagColIndexByUid(STagCond* pTagCond, uint64_t uid) {
 
 bool tscIsUpdateQuery(STscObj* pObj) {
   if (pObj == NULL || pObj->signature != pObj) {
-    globalCode = TSDB_CODE_DISCONNECTED;
+    terrno = TSDB_CODE_DISCONNECTED;
     return TSDB_CODE_DISCONNECTED;
   }
 
diff --git a/src/common/inc/name.h b/src/common/inc/name.h
index 31a6d8fbeb..bafa003609 100644
--- a/src/common/inc/name.h
+++ b/src/common/inc/name.h
@@ -19,7 +19,7 @@ typedef struct SColumnInfoEx {
   void* pData;    // the corresponding block data in memory
 } SColumnInfoEx;
 
-int32_t extractTableName(const char *tableId, char *name);
+void extractTableName(const char *tableId, char *name);
 
 char* extractDBName(const char *tableId, char *name);
 
diff --git a/src/common/src/name.c b/src/common/src/name.c
index cf1eaa2bf1..b0411d742c 100644
--- a/src/common/src/name.c
+++ b/src/common/src/name.c
@@ -24,11 +24,11 @@ static FORCE_INLINE size_t copy(char* dst, const char* src, char delimiter) {
   return len;
 }
 
-int32_t extractTableName(const char* tableId, char* name) {
+void extractTableName(const char* tableId, char* name) {
   size_t offset = strcspn(tableId, &TS_PATH_DELIMITER[0]);
   offset = strcspn(&tableId[offset], &TS_PATH_DELIMITER[0]);
   
-  return strncpy(name, &tableId[offset], TSDB_TABLE_NAME_LEN);
+  strncpy(name, &tableId[offset], TSDB_TABLE_NAME_LEN);
   
 //  char* r = skipSegments(tableId, TS_PATH_DELIMITER[0], 2);
 //  return copy(name, r, TS_PATH_DELIMITER[0]);
diff --git a/src/mnode/src/mgmtTable.c b/src/mnode/src/mgmtTable.c
index 6dbf81bad7..cf20c47646 100644
--- a/src/mnode/src/mgmtTable.c
+++ b/src/mnode/src/mgmtTable.c
@@ -1897,9 +1897,8 @@ static int32_t mgmtRetrieveShowTables(SShowObj *pShow, char *data, int32_t rows,
     }
 
     char tableName[TSDB_TABLE_NAME_LEN] = {0};
-    memset(tableName, 0, tListLen(tableName));
     
-    // pattern compare for meter name
+    // pattern compare for table name
     mgmtExtractTableName(pTable->info.tableId, tableName);
 
     if (pShow->payloadLen > 0 &&
diff --git a/src/query/inc/queryUtil.h b/src/query/inc/queryUtil.h
index 06a716b750..677ddf6378 100644
--- a/src/query/inc/queryUtil.h
+++ b/src/query/inc/queryUtil.h
@@ -36,4 +36,6 @@ bool isWindowResClosed(SWindowResInfo *pWindowResInfo, int32_t slot);
 
 void createQueryResultInfo(SQuery *pQuery, SWindowResult *pResultRow, bool isSTableQuery, SPosInfo *posInfo);
 
+char *getPosInResultPage(SQueryRuntimeEnv *pRuntimeEnv, int32_t columnIndex, SWindowResult *pResult);
+
 #endif  // TDENGINE_QUERYUTIL_H
diff --git a/src/query/src/qparserImpl.c b/src/query/src/qparserImpl.c
index a40b1bb8d2..f5763cfb45 100644
--- a/src/query/src/qparserImpl.c
+++ b/src/query/src/qparserImpl.c
@@ -900,174 +900,4 @@ void setDefaultCreateDbOption(SCreateDBInfo *pDBInfo) {
   pDBInfo->keep = NULL;
 
   memset(&pDBInfo->precision, 0, sizeof(SSQLToken));
-}
-
-static bool isExprLeafNode(tSQLExpr* pExpr) {
-  return (pExpr->pRight == NULL && pExpr->pLeft == NULL) &&
-      (pExpr->nSQLOptr == TK_ID || (pExpr->nSQLOptr >= TK_BOOL && pExpr->nSQLOptr <= TK_NCHAR) ||
-          pExpr->nSQLOptr == TK_SET);
-}
-
-static bool isExprParentOfLeafNode(tSQLExpr* pExpr) {
-  return (pExpr->pLeft != NULL && pExpr->pRight != NULL) &&
-      (isExprLeafNode(pExpr->pLeft) && isExprLeafNode(pExpr->pRight));
-}
-
-static int32_t tSQLExprNodeToString(tSQLExpr* pExpr, SStringBuilder* pBuilder) {
-  if (pExpr->nSQLOptr == TK_ID) {  // column name
-//    strncpy(*str, pExpr->colInfo.z, pExpr->colInfo.n);
-//    *str += pExpr->colInfo.n;
-    
-  } else if (pExpr->nSQLOptr >= TK_BOOL && pExpr->nSQLOptr <= TK_STRING) {  // value
-//    *str += tVariantToString(&pExpr->val, *str);
-//    taosStringBuilderAppendStringLen()
-  } else if (pExpr->nSQLOptr >= TK_COUNT && pExpr->nSQLOptr <= TK_AVG_IRATE) {
-    taosStringBuilderAppendStringLen(pBuilder, pExpr->operand.z, pExpr->operand.n);
-  } else {  // not supported operation
-    assert(false);
-  }
-  
-  return TSDB_CODE_SUCCESS;
-}
-
-static int32_t optrToString(tSQLExpr* pExpr, char** exprString) {
-  const char* le = "<=";
-  const char* ge = ">=";
-  const char* ne = "<>";
-  const char* likeOptr = "LIKE";
-  
-  switch (pExpr->nSQLOptr) {
-    case TK_LE: {
-      *(int16_t*)(*exprString) = *(int16_t*)le;
-      *exprString += 1;
-      break;
-    }
-    case TK_GE: {
-      *(int16_t*)(*exprString) = *(int16_t*)ge;
-      *exprString += 1;
-      break;
-    }
-    case TK_NE: {
-      *(int16_t*)(*exprString) = *(int16_t*)ne;
-      *exprString += 1;
-      break;
-    }
-    
-    case TK_LT:
-      *(*exprString) = '<';
-      break;
-    case TK_GT:
-      *(*exprString) = '>';
-      break;
-    case TK_EQ:
-      *(*exprString) = '=';
-      break;
-    case TK_PLUS:
-      *(*exprString) = '+';
-      break;
-    case TK_MINUS:
-      *(*exprString) = '-';
-      break;
-    case TK_STAR:
-      *(*exprString) = '*';
-      break;
-    case TK_DIVIDE:
-      *(*exprString) = '/';
-      break;
-    case TK_REM:
-      *(*exprString) = '%';
-      break;
-    case TK_LIKE: {
-      int32_t len = sprintf(*exprString, " %s ", likeOptr);
-      *exprString += (len - 1);
-      break;
-    }
-    default:
-      return TSDB_CODE_INVALID_SQL;
-  }
-  
-  *exprString += 1;
-  return TSDB_CODE_SUCCESS;
-}
-
-static int32_t tSQLExprLeafToBinary(tSQLExpr* pExpr, SStringBuilder* pBuilder) {
-  if (!isExprParentOfLeafNode(pExpr)) {
-    return TSDB_CODE_INVALID_SQL;
-  }
-  
-  tSQLExpr* pLeft = pExpr->pLeft;
-  tSQLExpr* pRight = pExpr->pRight;
-  
-//  if (addParentheses) {
-//    *(*output) = '(';
-//    *output += 1;
-//  }
-  
-  tSQLExprNodeToString(pLeft, pBuilder);
-  tSQLExprNodeToString(pRight, pBuilder);
-  
-  if (optrToString(pExpr, pBuilder) != TSDB_CODE_SUCCESS) {
-    return TSDB_CODE_INVALID_SQL;
-  }
-  
-//  if (addParentheses) {
-//    *(*output) = ')';
-//    *output += 1;
-//  }
-  
-  return TSDB_CODE_SUCCESS;
-}
-
-static void relToString(tSQLExpr* pExpr, SStringBuilder* pBuilder) {
-  assert(pExpr->nSQLOptr == TK_AND || pExpr->nSQLOptr == TK_OR);
-  
-  const char* or = "OR";
-  const char*and = "AND";
-  
-  //    if (pQueryInfo->tagCond.relType == TSQL_STABLE_QTYPE_COND) {
-//  if (pExpr->nSQLOptr == TK_AND) {
-//    strcpy(*str, and);
-//    *str += strlen(and);
-//  } else {
-//    strcpy(*str, or);
-//    *str += strlen(or);
-//  }
-}
-
-static int32_t doSQLExprToBinary(tSQLExpr* pExpr, SStringBuilder* pBuilder) {
-  if (pExpr == NULL) {
-    return TSDB_CODE_SUCCESS;
-  }
-  
-  if (!isExprParentOfLeafNode(pExpr)) {
-//    *(*str) = '(';
-//    *str += 1;
-    
-    int32_t ret = doSQLExprToBinary(pExpr->pLeft, pBuilder);
-    if (ret != TSDB_CODE_SUCCESS) {
-      return ret;
-    }
-    
-    ret = doSQLExprToBinary(pExpr->pRight, pBuilder);
-    if (ret != TSDB_CODE_SUCCESS) {
-      return ret;
-    }
-    
-    relToString(pExpr, pBuilder);
-    
-//    *(*str) = ')';
-//    *str += 1;
-    
-    return ret;
-  }
-  
-  return tSQLExprLeafToBinary(pExpr, pBuilder);
-}
-
-// post order seralize to binary data
-int32_t tSQLExprToBinary(tSQLExpr* pExpr, SStringBuilder* pBuilder) {
-  assert(pExpr != NULL && pBuilder != NULL);
-  
-  
-  
 }
\ No newline at end of file
diff --git a/src/query/src/queryExecutor.c b/src/query/src/queryExecutor.c
index 20697f3227..4c4014996e 100644
--- a/src/query/src/queryExecutor.c
+++ b/src/query/src/queryExecutor.c
@@ -47,7 +47,7 @@
 #define SET_SUPPLEMENT_SCAN_FLAG(runtime) ((runtime)->scanFlag = SUPPLEMENTARY_SCAN)
 #define SET_MASTER_SCAN_FLAG(runtime) ((runtime)->scanFlag = MASTER_SCAN)
 
-#define GET_QINFO_ADDR(x) ((char *)(x)-offsetof(SQInfo, runtimeEnv))
+#define GET_QINFO_ADDR(x) ((void*)((char *)(x)-offsetof(SQInfo, runtimeEnv)))
 
 #define GET_COL_DATA_POS(query, index, step) ((query)->pos + (index) * (step))
 
@@ -1140,13 +1140,13 @@ static int32_t rowwiseApplyAllFunctions(SQueryRuntimeEnv *pRuntimeEnv, SDataStat
     bool  hasNull = hasNullValue(pQuery, k, pDataBlockInfo, pStatis, &pColStatis);
     char *dataBlock = getDataBlocks(pRuntimeEnv, &sasArray[k], k, pDataBlockInfo->size, pDataBlock);
 
-    setExecParams(pQuery, &pCtx[k], dataBlock, (char *)primaryKeyCol, pDataBlockInfo->size, functionId, pColStatis,
+    setExecParams(pQuery, &pCtx[k], dataBlock, primaryKeyCol, pDataBlockInfo->size, functionId, pColStatis,
                   hasNull, &sasArray[k], pRuntimeEnv->scanFlag);
   }
 
   // set the input column data
   for (int32_t k = 0; k < pQuery->numOfFilterCols; ++k) {
-    SSingleColumnFilterInfo *pFilterInfo = &pQuery->pFilterInfo[k];
+//    SSingleColumnFilterInfo *pFilterInfo = &pQuery->pFilterInfo[k];
     assert(0);
     /*
      * NOTE: here the tbname/tags column cannot reach here, since it will never be a filter column,
@@ -1465,7 +1465,7 @@ static int32_t setupQueryRuntimeEnv(SQueryRuntimeEnv *pRuntimeEnv, SColumnModel
   pRuntimeEnv->offset[0] = 0;
   for (int32_t i = 0; i < pQuery->numOfOutputCols; ++i) {
     SSqlFuncExprMsg *pSqlFuncMsg = &pQuery->pSelectExpr[i].pBase;
-    SColIndexEx *    pColIndexEx = &pSqlFuncMsg->colInfo;
+//    SColIndexEx *    pColIndexEx = &pSqlFuncMsg->colInfo;
 
     SQLFunctionCtx *pCtx = &pRuntimeEnv->pCtx[i];
     pCtx->inputType = GET_COLUMN_TYPE(pQuery, i);
@@ -1586,7 +1586,7 @@ static bool isQueryKilled(SQInfo *pQInfo) {
 #endif
 }
 
-static bool setQueryKilled(SQInfo* pQInfo) {
+static void setQueryKilled(SQInfo* pQInfo) {
   pQInfo->code = TSDB_CODE_QUERY_CANCELLED;
 }
 
@@ -1738,6 +1738,7 @@ static UNUSED_FUNC bool doGetQueryPos(TSKEY key, SQInfo *pQInfo, SPointInterpoSu
     }
   }
 #endif
+  return true;
 }
 
 static UNUSED_FUNC bool doSetDataInfo(SQInfo *pQInfo, SPointInterpoSupporter *pPointInterpSupporter, void *pMeterObj,
@@ -2924,11 +2925,11 @@ int32_t tableResultComparFn(const void *pLeft, const void *pRight, void *param)
 }
 
 int32_t mergeResultsToGroup(SQInfo *pQInfo) {
-  SQueryRuntimeEnv *pRuntimeEnv = &pQInfo->runtimeEnv;
-  SQuery *          pQuery = pRuntimeEnv->pQuery;
+//  SQueryRuntimeEnv *pRuntimeEnv = &pQInfo->runtimeEnv;
+//  SQuery *          pQuery = pRuntimeEnv->pQuery;
 
-  int64_t st = taosGetTimestampMs();
-  int32_t ret = TSDB_CODE_SUCCESS;
+//  int64_t st = taosGetTimestampMs();
+//  int32_t ret = TSDB_CODE_SUCCESS;
 
   //  while (pQInfo->subgroupIdx < pQInfo->pSidSet->numOfSubSet) {
   //    int32_t start = pQInfo->pSidSet->starterPos[pQInfo->subgroupIdx];
@@ -2994,7 +2995,7 @@ void copyResToQueryResultBuf(SQInfo *pQInfo, SQuery *pQuery) {
 
     for (int32_t i = 0; i < pQuery->numOfOutputCols; ++i) {
       int32_t bytes = pRuntimeEnv->pCtx[i].outputBytes;
-      char *  pDest = pQuery->sdata[i];
+      char *  pDest = pQuery->sdata[i]->data;
 
       memcpy(pDest + offset * bytes, pData->data + pRuntimeEnv->offset[i] * pData->numOfElems,
              bytes * pData->numOfElems);
@@ -3033,7 +3034,7 @@ int64_t getNumOfResultWindowRes(SQueryRuntimeEnv *pRuntimeEnv, SWindowResult *pW
   return maxOutput;
 }
 
-int32_t doMergeMetersResultsToGroupRes(SQInfo *pQInfo, STableDataInfo *pTableDataInfo, int32_t start, int32_t end) {
+UNUSED_FUNC int32_t doMergeMetersResultsToGroupRes(SQInfo *pQInfo, STableDataInfo *pTableDataInfo, int32_t start, int32_t end) {
   SQueryRuntimeEnv *pRuntimeEnv = &pQInfo->runtimeEnv;
   SQuery *          pQuery = pQInfo->runtimeEnv.pQuery;
 
@@ -3204,7 +3205,7 @@ int32_t flushFromResultBuf(SQInfo *pQInfo) {
 
 void resetMergeResultBuf(SQuery *pQuery, SQLFunctionCtx *pCtx, SResultInfo *pResultInfo) {
   for (int32_t k = 0; k < pQuery->numOfOutputCols; ++k) {
-    pCtx[k].aOutputBuf = pQuery->sdata[k] - pCtx[k].outputBytes;
+    pCtx[k].aOutputBuf = pQuery->sdata[k]->data - pCtx[k].outputBytes;
     pCtx[k].size = 1;
     pCtx[k].startOffset = 0;
     pCtx[k].resultInfo = &pResultInfo[k];
@@ -3561,7 +3562,7 @@ void scanAllDataBlocks(SQueryRuntimeEnv *pRuntimeEnv) {
     }
 
     // set the correct start position, and load the corresponding block in buffer for next round scan all data blocks.
-    int32_t ret = tsdbDataBlockSeek(pRuntimeEnv->pQueryHandle, pos);
+    /*int32_t ret =*/ tsdbDataBlockSeek(pRuntimeEnv->pQueryHandle, pos);
 
     status = pQuery->status;
     pRuntimeEnv->windowResInfo.curIndex = activeSlot;
@@ -3582,7 +3583,7 @@ void scanAllDataBlocks(SQueryRuntimeEnv *pRuntimeEnv) {
 
   pQuery->window.skey = skey;
   pQuery->window.ekey = pQuery->lastKey - step;
-  tsdbpos_t current = tsdbDataBlockTell(pRuntimeEnv->pQueryHandle);
+  /*tsdbpos_t current =*/ tsdbDataBlockTell(pRuntimeEnv->pQueryHandle);
 
   doSingleMeterSupplementScan(pRuntimeEnv);
 
@@ -3591,7 +3592,7 @@ void scanAllDataBlocks(SQueryRuntimeEnv *pRuntimeEnv) {
   pQuery->lastKey = lkey;
   pQuery->window.ekey = ekey;
 
-  STimeWindow win = {.skey = pQuery->window.skey, .ekey = pQuery->window.ekey};
+//  STimeWindow win = {.skey = pQuery->window.skey, .ekey = pQuery->window.ekey};
 //  tsdbResetQuery(pRuntimeEnv->pQueryHandle, &win, current, pQuery->order.order);
 //  tsdbNextDataBlock(pRuntimeEnv->pQueryHandle);
 }
@@ -4020,7 +4021,7 @@ bool vnodeHasRemainResults(void *handle) {
 
     // query has completed
     if (Q_STATUS_EQUAL(pQuery->status, QUERY_COMPLETED)) {
-      TSKEY ekey = taosGetRevisedEndKey(pQuery->window.ekey, pQuery->order.order, pQuery->intervalTime,
+      /*TSKEY ekey =*/ taosGetRevisedEndKey(pQuery->window.ekey, pQuery->order.order, pQuery->intervalTime,
                                         pQuery->slidingTimeUnit, pQuery->precision);
       //      int32_t numOfTotal = taosGetNumOfResultWithInterpo(pInterpoInfo, (TSKEY
       //      *)pRuntimeEnv->pInterpoBuf[0]->data,
@@ -4088,8 +4089,8 @@ static void doCopyQueryResultToMsg(SQInfo *pQInfo, int32_t numOfRows, char *data
 
 int32_t vnodeQueryResultInterpolate(SQInfo *pQInfo, tFilePage **pDst, tFilePage **pDataSrc, int32_t numOfRows,
                                     int32_t *numOfInterpo) {
-  SQueryRuntimeEnv *pRuntimeEnv = &pQInfo->runtimeEnv;
-  SQuery *          pQuery = pRuntimeEnv->pQuery;
+//  SQueryRuntimeEnv *pRuntimeEnv = &pQInfo->runtimeEnv;
+//  SQuery *          pQuery = pRuntimeEnv->pQuery;
 #if 0
   while (1) {
     numOfRows = taosNumOfRemainPoints(&pRuntimeEnv->interpoInfo);
@@ -4390,8 +4391,8 @@ static int64_t queryOnDataBlocks(SQInfo *pQInfo) {
 static bool multimeterMultioutputHelper(SQInfo *pQInfo, bool *dataInDisk, bool *dataInCache, int32_t index,
                                         int32_t start) {
   //  STableIdInfo **pMeterSidExtInfo = pQInfo->pMeterSidExtInfo;
-  SQueryRuntimeEnv *pRuntimeEnv = &pQInfo->runtimeEnv;
-  SQuery *          pQuery = &pRuntimeEnv->pQuery;
+//  SQueryRuntimeEnv *pRuntimeEnv = &pQInfo->runtimeEnv;
+//  SQuery *          pQuery = pRuntimeEnv->pQuery;
 #if 0
   setQueryStatus(pQuery, QUERY_NOT_COMPLETED);
   
@@ -4438,7 +4439,7 @@ static bool multimeterMultioutputHelper(SQInfo *pQInfo, bool *dataInDisk, bool *
 
 #endif
 
-  initCtxOutputBuf(pRuntimeEnv);
+//  initCtxOutputBuf(pRuntimeEnv);
   return true;
 }
 
@@ -5457,8 +5458,8 @@ static int32_t convertQueryMsg(SQueryTableMsg *pQueryMsg, SArray **pTableIdList,
 }
 
 static int32_t buildAirthmeticExprFromMsg(SSqlFunctionExpr *pExpr, SQueryTableMsg *pQueryMsg) {
-  SSqlBinaryExprInfo *pBinaryExprInfo = &pExpr->binExprInfo;
-  SColumnInfo *       pColMsg = pQueryMsg->colList;
+//  SSqlBinaryExprInfo *pBinaryExprInfo = &pExpr->binExprInfo;
+//  SColumnInfo *       pColMsg = pQueryMsg->colList;
 #if 0
   tExprNode* pBinExpr = NULL;
   SSchema*        pSchema = toSchema(pQueryMsg, pColMsg, pQueryMsg->numOfCols);
@@ -5874,7 +5875,7 @@ static bool isValidQInfo(void *param) {
    * pQInfo->signature may be changed by another thread, so we assign value of signature
    * into local variable, then compare by using local variable
    */
-  uint64_t sig = pQInfo->signature;
+  uint64_t sig = (uint64_t) pQInfo->signature;
   return (sig == (uint64_t)pQInfo);
 }
 
diff --git a/src/query/tests/astTest.cpp b/src/query/tests/astTest.cpp
index ac10cd2429..3b1f36e90f 100644
--- a/src/query/tests/astTest.cpp
+++ b/src/query/tests/astTest.cpp
@@ -9,6 +9,9 @@
 #include "tsdb.h"
 #include "tskiplist.h"
 
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wwrite-strings"
+
 typedef struct ResultObj {
   int32_t numOfResult;
   char *  resultName[64];
diff --git a/src/query/tests/tsBufTest.cpp b/src/query/tests/tsBufTest.cpp
index 2392bd00b5..ff58e2a974 100644
--- a/src/query/tests/tsBufTest.cpp
+++ b/src/query/tests/tsBufTest.cpp
@@ -158,7 +158,7 @@ void loadDataTest() {
     for (int32_t i = 0; i < numOfTags; ++i) {
       int64_t* list = createTsList(num, start, step);
       tsBufAppend(pTSBuf, j, i, (const char*)list, num * sizeof(int64_t));
-      printf("%d - %lld\n", i, list[0]);
+      printf("%d - %" PRIu64 "\n", i, list[0]);
 
       free(list);
       start += step * num;
@@ -195,7 +195,7 @@ void loadDataTest() {
   tsBufResetPos(pNewBuf);
 
   int64_t s = taosGetTimestampUs();
-  printf("start:%lld\n", s);
+  printf("start:%" PRIu64 "\n", s);
 
   int32_t x = 0;
   while (tsBufNextPos(pNewBuf)) {
@@ -204,11 +204,11 @@ void loadDataTest() {
       break;
     }
 
-    //    printf("%d-%lld-%lld\n", elem.vnode, elem.tag, elem.ts);
+    //    printf("%d-%" PRIu64 "-%" PRIu64 "\n", elem.vnode, elem.tag, elem.ts);
   }
 
   int64_t e = taosGetTimestampUs();
-  printf("end:%lld, elapsed:%lld, total obj:%d\n", e, e - s, x);
+  printf("end:%" PRIu64 ", elapsed:%" PRIu64 ", total obj:%d\n", e, e - s, x);
 }
 
 void randomIncTsTest() {}
@@ -229,14 +229,14 @@ void TSTraverse() {
     for (int32_t i = 0; i < numOfTags; ++i) {
       int64_t* list = createTsList(num, start, step);
       tsBufAppend(pTSBuf, j, i, (const char*)list, num * sizeof(int64_t));
-      printf("%d - %d - %lld, %lld\n", j, i, list[0], list[num - 1]);
+      printf("%d - %d - %" PRIu64 ", %" PRIu64 "\n", j, i, list[0], list[num - 1]);
 
       free(list);
       start += step * num;
 
       list = createTsList(num, start, step);
       tsBufAppend(pTSBuf, j, i, (const char*)list, num * sizeof(int64_t));
-      printf("%d - %d - %lld, %lld\n", j, i, list[0], list[num - 1]);
+      printf("%d - %d - %" PRIu64 ", %" PRIu64 "\n", j, i, list[0], list[num - 1]);
       free(list);
 
       start += step * num;
@@ -250,7 +250,7 @@ void TSTraverse() {
   ////////////////////////////////////////////////////////////////////////////////////////
   // reverse traverse
   int64_t s = taosGetTimestampUs();
-  printf("start:%lld\n", s);
+  printf("start:%" PRIu64 "\n", s);
 
   pTSBuf->cur.order = TSQL_SO_DESC;
 
@@ -258,7 +258,7 @@ void TSTraverse() {
   int32_t x = 0;
   while (tsBufNextPos(pTSBuf)) {
     STSElem elem = tsBufGetElem(pTSBuf);
-    //    printf("%d-%lld-%lld\n", elem.vnode, elem.tag, elem.ts);
+    //    printf("%d-%" PRIu64 "-%" PRIu64 "\n", elem.vnode, elem.tag, elem.ts);
   }
 
   // specify the data block with vnode and tags value
@@ -273,7 +273,7 @@ void TSTraverse() {
   int32_t totalOutput = 10;
   while (1) {
     STSElem elem = tsBufGetElem(pTSBuf);
-    printf("%d-%lld-%lld\n", elem.vnode, elem.tag, elem.ts);
+    printf("%d-%" PRIu64 "-%" PRIu64 "\n", elem.vnode, elem.tag, elem.ts);
 
     if (!tsBufNextPos(pTSBuf)) {
       break;
@@ -303,7 +303,7 @@ void TSTraverse() {
   // complete forwards traverse
   while (tsBufNextPos(pTSBuf)) {
     STSElem elem = tsBufGetElem(pTSBuf);
-    //    printf("%d-%lld-%lld\n", elem.vnode, elem.tag, elem.ts);
+    //    printf("%d-%" PRIu64 "-%" PRIu64 "\n", elem.vnode, elem.tag, elem.ts);
   }
 
   // specify the data block with vnode and tags value
@@ -318,7 +318,7 @@ void TSTraverse() {
   totalOutput = 10;
   while (1) {
     STSElem elem = tsBufGetElem(pTSBuf);
-    printf("%d-%lld-%lld\n", elem.vnode, elem.tag, elem.ts);
+    printf("%d-%" PRIu64 "-%" PRIu64 "\n", elem.vnode, elem.tag, elem.ts);
 
     if (!tsBufNextPos(pTSBuf)) {
       break;
@@ -429,7 +429,7 @@ void mergeIdenticalVnodeBufferTest() {
     STSElem elem = tsBufGetElem(pTSBuf1);
     EXPECT_EQ(elem.vnode, 12);
 
-    printf("%d-%lld-%lld\n", elem.vnode, elem.tag, elem.ts);
+    printf("%d-%" PRIu64 "-%" PRIu64 "\n", elem.vnode, elem.tag, elem.ts);
   }
 
   tsBufDestory(pTSBuf1);
diff --git a/src/query/tests/unitTest.cpp b/src/query/tests/unitTest.cpp
index c7520c90f9..df28a3e4d1 100644
--- a/src/query/tests/unitTest.cpp
+++ b/src/query/tests/unitTest.cpp
@@ -11,6 +11,9 @@
 #include "tvariant.h"
 #include "ttokendef.h"
 
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wwrite-strings"
+
 namespace {
 int32_t testValidateName(char* name) {
   SSQLToken token = {0};
diff --git a/src/util/inc/tcache.h b/src/util/inc/tcache.h
index 36635fff30..a29e720e67 100644
--- a/src/util/inc/tcache.h
+++ b/src/util/inc/tcache.h
@@ -98,7 +98,7 @@ SCacheObj *taosCacheInit(void *tmrCtrl, int64_t refreshTimeInSeconds);
  * @param keepTime      survival time in second
  * @return              cached element
  */
-void *taosCachePut(SCacheObj *pCacheObj, char *key, void *pData, size_t dataSize, int keepTimeInSeconds);
+void *taosCachePut(SCacheObj *pCacheObj, const char *key, const void *pData, size_t dataSize, int keepTimeInSeconds);
 
 /**
  * get data from cache
diff --git a/src/util/src/tcache.c b/src/util/src/tcache.c
index 5f04765f01..8bfec97032 100644
--- a/src/util/src/tcache.c
+++ b/src/util/src/tcache.c
@@ -233,8 +233,8 @@ static FORCE_INLINE void taosCacheMoveToTrash(SCacheObj *pCacheObj, SCacheDataNo
  * @param dataSize
  * @return
  */
-static SCacheDataNode *taosUpdateCacheImpl(SCacheObj *pCacheObj, SCacheDataNode *pNode, char *key, int32_t keyLen,
-                                           void *pData, uint32_t dataSize, uint64_t duration) {
+static SCacheDataNode *taosUpdateCacheImpl(SCacheObj *pCacheObj, SCacheDataNode *pNode, const char *key, int32_t keyLen,
+                                           const void *pData, uint32_t dataSize, uint64_t duration) {
   SCacheDataNode *pNewNode = NULL;
   
   // only a node is not referenced by any other object, in-place update it
@@ -288,7 +288,7 @@ static SCacheDataNode *taosUpdateCacheImpl(SCacheObj *pCacheObj, SCacheDataNode
  * @param pNode
  * @return
  */
-static FORCE_INLINE SCacheDataNode *taosAddToCacheImpl(SCacheObj *pCacheObj, char *key, size_t keyLen, const void *pData,
+static FORCE_INLINE SCacheDataNode *taosAddToCacheImpl(SCacheObj *pCacheObj, const char *key, size_t keyLen, const void *pData,
                                                        size_t dataSize, uint64_t duration) {
   SCacheDataNode *pNode = taosCreateHashNode(key, keyLen, pData, dataSize, duration);
   if (pNode == NULL) {
@@ -401,7 +401,7 @@ SCacheObj *taosCacheInit(void *tmrCtrl, int64_t refreshTime) {
   return pCacheObj;
 }
 
-void *taosCachePut(SCacheObj *pCacheObj, char *key, void *pData, size_t dataSize, int duration) {
+void *taosCachePut(SCacheObj *pCacheObj, const char *key, const void *pData, size_t dataSize, int duration) {
   SCacheDataNode *pNode;
   
   if (pCacheObj == NULL || pCacheObj->pHashTable == NULL) {
diff --git a/src/util/src/tutil.c b/src/util/src/tutil.c
index 4c689a5bcd..cadb2e706c 100644
--- a/src/util/src/tutil.c
+++ b/src/util/src/tutil.c
@@ -645,7 +645,7 @@ void * taosbsearch(const void *key, const void *base, size_t nmemb, size_t size,
       }
     }
 
-    if ((*compar)(key, elePtrAt(base, size, idx) < 0)) {
+    if ((*compar)(key, elePtrAt(base, size, idx)) < 0) {
       return elePtrAt(base, size, idx);
     } else {
       if (idx + 1 > nmemb - 1) {
diff --git a/src/util/tests/cacheTest.cpp b/src/util/tests/cacheTest.cpp
index 1902fef4b6..13fb7d7afb 100644
--- a/src/util/tests/cacheTest.cpp
+++ b/src/util/tests/cacheTest.cpp
@@ -22,15 +22,15 @@ TEST(testCase, client_cache_test) {
   void* tscTmr = taosTmrInit (tsMaxMgmtConnections*2, 200, 6000, "TSC");
   SCacheObj* tscCacheHandle = taosCacheInit(tscTmr, REFRESH_TIME_IN_SEC);
 
-  char* key1 = "test1";
-  char* data1 = "test11";
+  const char* key1 = "test1";
+  char data1[] = "test11";
 
   char* cachedObj = (char*) taosCachePut(tscCacheHandle, key1, data1, strlen(data1), 1);
   sleep(REFRESH_TIME_IN_SEC+1);
 
   printf("obj is still valid: %s\n", cachedObj);
 
-  char* data2 = "test22";
+  char data2[] = "test22";
   taosCacheRelease(tscCacheHandle, (void**) &cachedObj, false);
 
   /* the object is cleared by cache clean operation */
@@ -43,8 +43,8 @@ TEST(testCase, client_cache_test) {
 
   getchar();
 
-  char* key3 = "test2";
-  char* data3 = "kkkkkkk";
+  const char* key3 = "test2";
+  const char* data3 = "kkkkkkk";
 
   char* cachedObj2 = (char*) taosCachePut(tscCacheHandle, key3, data3, strlen(data3), 1);
   printf("%s\n", cachedObj2);
@@ -55,11 +55,11 @@ TEST(testCase, client_cache_test) {
   char* d = (char*) taosCacheAcquireByName(tscCacheHandle, key3);
 //    assert(d == NULL);
 
-  char* key5 = "test5";
-  char* data5 = "data5kkkkk";
+  char key5[] = "test5";
+  char data5[] = "data5kkkkk";
   cachedObj2 = (char*) taosCachePut(tscCacheHandle, key5, data5, strlen(data5), 20);
 
-  char* data6= "new Data after updated";
+  const char* data6= "new Data after updated";
   taosCacheRelease(tscCacheHandle, (void**) &cachedObj2, false);
 
   cachedObj2 = (char*) taosCachePut(tscCacheHandle, key5, data6, strlen(data6), 20);
@@ -67,7 +67,7 @@ TEST(testCase, client_cache_test) {
 
   taosCacheRelease(tscCacheHandle, (void**) &cachedObj2, true);
 
-  char* data7 = "add call update procedure";
+  const char* data7 = "add call update procedure";
   cachedObj2 = (char*) taosCachePut(tscCacheHandle, key5, data7, strlen(data7), 20);
   printf("%s\n=======================================\n\n", cachedObj2);
 
@@ -76,8 +76,8 @@ TEST(testCase, client_cache_test) {
   taosCacheRelease(tscCacheHandle, (void**) &cachedObj2, true);
   taosCacheRelease(tscCacheHandle, (void**) &cc, false);
 
-  char* data8 = "ttft";
-  char* key6 = "key6";
+  const char* data8 = "ttft";
+  const char* key6 = "key6";
 
   char* ft = (char*) taosCachePut(tscCacheHandle, key6, data8, strlen(data8), 20);
   taosCacheRelease(tscCacheHandle, (void**) &ft, false);
@@ -86,7 +86,7 @@ TEST(testCase, client_cache_test) {
    * 140ns
    */
   uint64_t startTime = taosGetTimestampUs();
-  printf("Cache Performance Test\nstart time:%lld\n", startTime);
+  printf("Cache Performance Test\nstart time:%" PRIu64 "\n", startTime);
   for(int32_t i=0; i<1000; ++i) {
     char* dd = (char*) taosCacheAcquireByName(tscCacheHandle, key6);
     if (dd != NULL) {
@@ -101,7 +101,7 @@ TEST(testCase, client_cache_test) {
   uint64_t endTime = taosGetTimestampUs();
   int64_t el = endTime - startTime;
 
-  printf("End of Test, %lld\nTotal Elapsed Time:%lld us.avg:%f us\n", endTime, el, el/1000.0);
+  printf("End of Test, %" PRIu64 "\nTotal Elapsed Time:%" PRIu64 " us.avg:%f us\n", endTime, el, el/1000.0);
 
   taosCacheCleanup(tscCacheHandle);
 }
@@ -125,7 +125,7 @@ TEST(testCase, cache_resize_test) {
   }
   uint64_t endTime = taosGetTimestampUs();
 
-  printf("add %d object cost:%lld us, avg:%f us\n", num, endTime - startTime, (endTime-startTime)/(double)num);
+  printf("add %d object cost:%" PRIu64 " us, avg:%f us\n", num, endTime - startTime, (endTime-startTime)/(double)num);
 
   startTime = taosGetTimestampUs();
   for(int32_t i = 0; i < num; ++i) {
@@ -134,7 +134,7 @@ TEST(testCase, cache_resize_test) {
     assert(k != 0);
   }
   endTime = taosGetTimestampUs();
-  printf("retrieve %d object cost:%lld us,avg:%f\n", num, endTime - startTime, (endTime - startTime)/(double)num);
+  printf("retrieve %d object cost:%" PRIu64 " us,avg:%f\n", num, endTime - startTime, (endTime - startTime)/(double)num);
 
   taosCacheCleanup(pCache);
   taosMsleep(20000);
diff --git a/src/util/tests/skiplistTest.cpp b/src/util/tests/skiplistTest.cpp
index c009231874..9e690c3924 100644
--- a/src/util/tests/skiplistTest.cpp
+++ b/src/util/tests/skiplistTest.cpp
@@ -175,7 +175,7 @@ void stringKeySkiplistTest() {
   }
 
   int64_t e = taosGetTimestampUs();
-  printf("elapsed time:%lld us to insert %d data, avg:%f us\n", (e - s), total, (double)(e - s) / total);
+  printf("elapsed time:%" PRIu64 " us to insert %d data, avg:%f us\n", (e - s), total, (double)(e - s) / total);
 
   printf("level two------------------\n");
   tSkipListPrint(pSkipList, 1);
@@ -237,13 +237,13 @@ void skiplistPerformanceTest() {
       int64_t cur = taosGetTimestampMs();
 
       int64_t elapsed = cur - prev;
-      printf("add %d, elapsed time: %lld ms, avg elapsed:%f ms, total:%d\n", 100000, elapsed, elapsed / 100000.0, i);
+      printf("add %d, elapsed time: %" PRIu64 " ms, avg elapsed:%f ms, total:%d\n", 100000, elapsed, elapsed / 100000.0, i);
       prev = cur;
     }
   }
 
   int64_t e = taosGetTimestampMs();
-  printf("total:%lld ms, avg:%f\n", e - s, (e - s) / (double)size);
+  printf("total:%" PRIu64 " ms, avg:%f\n", e - s, (e - s) / (double)size);
   printf("max level of skiplist:%d, actually level:%d\n ", pSkipList->maxLevel, pSkipList->level);
 
   assert(tSkipListGetSize(pSkipList) == size);
diff --git a/src/vnode/tsdb/src/tsdbMain.c b/src/vnode/tsdb/src/tsdbMain.c
index 5be2f11b15..88ede6aabd 100644
--- a/src/vnode/tsdb/src/tsdbMain.c
+++ b/src/vnode/tsdb/src/tsdbMain.c
@@ -183,7 +183,7 @@ tsdb_repo_t *tsdbOpenRepo(char *tsdbDir) {
     return NULL;
   }
 
-  STsdbRepo *pRepo = (STsdbRepo *)malloc(sizeof(STsdbRepo));
+  STsdbRepo *pRepo = (STsdbRepo *)calloc(1, sizeof(STsdbRepo));
   if (pRepo == NULL) {
     return NULL;
   }
diff --git a/src/vnode/tsdb/src/tsdbRead.c b/src/vnode/tsdb/src/tsdbRead.c
index a625770160..30d0e94950 100644
--- a/src/vnode/tsdb/src/tsdbRead.c
+++ b/src/vnode/tsdb/src/tsdbRead.c
@@ -301,6 +301,7 @@ tsdb_query_handle_t *tsdbQueryByTableId(tsdb_repo_t* tsdb, STsdbQueryCond *pCond
       .pCompInfo = calloc(1, 1024),
     };
     
+    assert(info.pTableObj != NULL);
     taosArrayPush(pQueryHandle->pTableCheckInfo, &info);
   }
   
@@ -1008,17 +1009,21 @@ SArray *tsdbRetrieveDataBlock(tsdb_query_handle_t *pQueryHandle, SArray *pIdList
   }
 }
 
-int32_t tsdbResetQuery(tsdb_query_handle_t *pQueryHandle, STimeWindow *window, tsdbpos_t position, int16_t order) {}
+int32_t tsdbResetQuery(tsdb_query_handle_t *pQueryHandle, STimeWindow *window, tsdbpos_t position, int16_t order) {
+  return 0;
+}
 
-int32_t tsdbDataBlockSeek(tsdb_query_handle_t *pQueryHandle, tsdbpos_t pos) {}
+int32_t tsdbDataBlockSeek(tsdb_query_handle_t *pQueryHandle, tsdbpos_t pos) { return 0;}
 
 tsdbpos_t tsdbDataBlockTell(tsdb_query_handle_t *pQueryHandle) { return NULL; }
 
-SArray *tsdbRetrieveDataRow(tsdb_query_handle_t *pQueryHandle, SArray *pIdList, SQueryRowCond *pCond) {}
+SArray *tsdbRetrieveDataRow(tsdb_query_handle_t *pQueryHandle, SArray *pIdList, SQueryRowCond *pCond) { return NULL;}
 
-tsdb_query_handle_t *tsdbQueryFromTagConds(STsdbQueryCond *pCond, int16_t stableId, const char *pTagFilterStr) {}
+tsdb_query_handle_t *tsdbQueryFromTagConds(STsdbQueryCond *pCond, int16_t stableId, const char *pTagFilterStr) {
+  return NULL;
+}
 
-SArray *tsdbGetTableList(tsdb_query_handle_t *pQueryHandle) {}
+SArray *tsdbGetTableList(tsdb_query_handle_t *pQueryHandle) { return NULL; }
 
 static SArray* createTableIdArrayList(STsdbRepo* tsdb, int64_t uid) {
   STable* pTable = tsdbGetTableByUid(tsdbGetMeta(tsdb), uid);
@@ -1048,7 +1053,7 @@ typedef struct SSyntaxTreeFilterSupporter {
  * convert the result pointer to STabObj instead of tSkipListNode
  * @param pRes
  */
-static void tansformQueryResult(SArray* pRes) {
+static UNUSED_FUNC void tansformQueryResult(SArray* pRes) {
   if (pRes == NULL || taosArrayGetSize(pRes) == 0) {
     return;
   }
@@ -1300,10 +1305,10 @@ bool tSkipListNodeFilterCallback(const void* pNode, void* param) {
 }
 
 static int32_t doQueryTableList(STable* pSTable, SArray* pRes, const char* pCond) {
-  STColumn* stcol = schemaColAt(pSTable->tagSchema, 0);
+//  STColumn* stcol = schemaColAt(pSTable->tagSchema, 0);
   
   tExprNode* pExpr = NULL;
-  tSQLBinaryExprFromString(&pExpr, stcol, schemaNCols(pSTable->tagSchema), pCond, strlen(pCond));
+//  tSQLBinaryExprFromString(&pExpr, stcol, schemaNCols(pSTable->tagSchema), (char*) pCond, strlen(pCond));
   
   // failed to build expression, no result, return immediately
   if (pExpr == NULL) {
@@ -1314,18 +1319,18 @@ static int32_t doQueryTableList(STable* pSTable, SArray* pRes, const char* pCond
   }
   
   // query according to the binary expression
-  SSyntaxTreeFilterSupporter s = {.pTagSchema = stcol, .numOfTags = schemaNCols(pSTable->tagSchema)};
-  
-  SBinaryFilterSupp supp = {
-      .fp = (__result_filter_fn_t)tSkipListNodeFilterCallback,
-      .setupInfoFn = (__do_filter_suppl_fn_t)filterPrepare,
-      .pExtInfo = &s
-  };
-  
-  tSQLBinaryExprTraverse(pExpr, pSTable->pIndex, pRes, &supp);
-  tExprTreeDestroy(&pExpr, tSQLListTraverseDestroyInfo);
-  
-  tansformQueryResult(pRes);
+//  SSyntaxTreeFilterSupporter s = {.pTagSchema = stcol, .numOfTags = schemaNCols(pSTable->tagSchema)};
+//
+//  SBinaryFilterSupp supp = {
+//      .fp = (__result_filter_fn_t)tSkipListNodeFilterCallback,
+//      .setupInfoFn = (__do_filter_suppl_fn_t)filterPrepare,
+//      .pExtInfo = &s
+//  };
+//
+//  tSQLBinaryExprTraverse(pExpr, pSTable->pIndex, pRes, &supp);
+//  tExprTreeDestroy(&pExpr, tSQLListTraverseDestroyInfo);
+//
+//  tansformQueryResult(pRes);
   
   return TSDB_CODE_SUCCESS;
 }
diff --git a/tests/examples/c/demo.c b/tests/examples/c/demo.c
index b621781a3c..853a949162 100644
--- a/tests/examples/c/demo.c
+++ b/tests/examples/c/demo.c
@@ -28,47 +28,23 @@ int main(int argc, char *argv[]) {
   TAOS *    taos;
   char      qstr[1024];
   TAOS_RES *result;
-
+  
   // connect to server
   if (argc < 2) {
     printf("please input server-ip \n");
     return 0;
   }
-
-  taos_options(TSDB_OPTION_CONFIGDIR, "~/first/cfg");
+  
   // init TAOS
   taos_init();
-
+  
   taos = taos_connect(argv[1], "root", "taosdata", NULL, 0);
   if (taos == NULL) {
     printf("failed to connect to server, reason:%s\n", taos_errstr(taos));
     exit(1);
   }
   printf("success to connect to server\n");
-
-//  int32_t code = taos_query(taos, "insert into test.tm2 values(now, 1)(now+1m,2)(now+2m,3) (now+3m, 4) (now+4m, 5);");
-  int32_t code = taos_query(taos, "insert into test.tm2 values(now, 99)");
-  if (code != 0) {
-    printf("failed to execute query, reason:%s\n", taos_errstr(taos));
-  }
   
-  TAOS_RES* res = taos_use_result(taos);
-  TAOS_ROW row = NULL;
-  char buf[512] = {0};
-  
-  int32_t numOfFields = taos_num_fields(res);
-  TAOS_FIELD* pFields = taos_fetch_fields(res);
-  
-  while((row = taos_fetch_row(res)) != NULL) {
-    taos_print_row(buf, row, pFields, numOfFields);
-    printf("%s\n", buf);
-    memset(buf, 0, 512);
-  }
-  
-  taos_close(taos);
-  
-  getchar();
-  return 0;
   
   taos_query(taos, "drop database demo");
   if (taos_query(taos, "create database demo") != 0) {
@@ -76,19 +52,19 @@ int main(int argc, char *argv[]) {
     exit(1);
   }
   printf("success to create database\n");
-
+  
   taos_query(taos, "use demo");
-
+  
   // create table
   if (taos_query(taos, "create table m1 (ts timestamp, speed int)") != 0) {
     printf("failed to create table, reason:%s\n", taos_errstr(taos));
     exit(1);
   }
   printf("success to create table\n");
-
+  
   // sleep for one second to make sure table is created on data node
   // taosMsleep(1000);
-
+  
   // insert 10 records
   int i = 0;
   for (i = 0; i < 10; ++i) {
@@ -99,27 +75,27 @@ int main(int argc, char *argv[]) {
     //sleep(1);
   }
   printf("success to insert rows, total %d rows\n", i);
-
+  
   // query the records
   sprintf(qstr, "SELECT * FROM m1");
   if (taos_query(taos, qstr) != 0) {
     printf("failed to select, reason:%s\n", taos_errstr(taos));
     exit(1);
   }
-
+  
   result = taos_use_result(taos);
-
+  
   if (result == NULL) {
     printf("failed to get result, reason:%s\n", taos_errstr(taos));
     exit(1);
   }
-
-//  TAOS_ROW    row;
+  
+  TAOS_ROW    row;
   int         rows = 0;
   int         num_fields = taos_field_count(taos);
   TAOS_FIELD *fields = taos_fetch_fields(result);
   char        temp[256];
-
+  
   printf("select * from table, result:\n");
   // fetch the records row by row
   while ((row = taos_fetch_row(result))) {
@@ -127,7 +103,7 @@ int main(int argc, char *argv[]) {
     taos_print_row(temp, row, fields, num_fields);
     printf("%s\n", temp);
   }
-
+  
   taos_free_result(result);
   printf("====demo end====\n\n");
   return getchar();