diff --git a/src/client/src/TSDBJNIConnector.c b/src/client/src/TSDBJNIConnector.c
index a9a34286a85e910b85ce754100adae3cd574b74e..dc44c8ea262925f00be8cedfce4c3f909d0ae906 100644
--- a/src/client/src/TSDBJNIConnector.c
+++ b/src/client/src/TSDBJNIConnector.c
@@ -192,7 +192,7 @@ JNIEXPORT jint JNICALL Java_com_taosdata_jdbc_TSDBJNIConnector_setOptions(JNIEnv
     const char *tz1 = (*env)->GetStringUTFChars(env, optionValue, NULL);
     if (tz1 && strlen(tz1) != 0) {
       res = taos_options(TSDB_OPTION_TIMEZONE, tz1);
-      jniTrace("set timezone to %s, result:%d", timezone, res);
+      jniTrace("set timezone to %s, result:%d", tz1, res);
     } else {
       jniTrace("input timezone is empty");
     }
diff --git a/src/client/src/tscSchemaUtil.c b/src/client/src/tscSchemaUtil.c
index 0dfbf8c48701becb568123040742cc9752df97ca..da06e3e5e22c7ead926339a36e79aba4317ba757 100644
--- a/src/client/src/tscSchemaUtil.c
+++ b/src/client/src/tscSchemaUtil.c
@@ -32,7 +32,6 @@ int32_t tscGetNumOfTags(const STableMeta* pTableMeta) {
   }
   
   if (pTableMeta->tableType == TSDB_SUPER_TABLE || pTableMeta->tableType == TSDB_CHILD_TABLE) {
-    assert(tinfo.numOfTags >= 0);
     return tinfo.numOfTags;
   }
   
diff --git a/src/client/src/tscServer.c b/src/client/src/tscServer.c
index 5a2054bbcdb500787554a7e4e0eecff14a2fc08d..da807b1964a17c27119c300dc6eb34e923a9f7ec 100644
--- a/src/client/src/tscServer.c
+++ b/src/client/src/tscServer.c
@@ -646,10 +646,6 @@ int tscBuildQueryMsg(SSqlObj *pSql, SSqlInfo *pInfo) {
   
   size_t numOfOutput = tscSqlExprNumOfExprs(pQueryInfo);
   pQueryMsg->numOfOutput = htons(numOfOutput);
-  if (numOfOutput < 0) {
-    tscError("%p illegal value of number of output columns in query msg: %d", pSql, numOfOutput);
-    return -1;
-  }
 
   // set column list ids
   size_t numOfCols = taosArrayGetSize(pQueryInfo->colList);
@@ -663,7 +659,7 @@ int tscBuildQueryMsg(SSqlObj *pSql, SSqlInfo *pInfo) {
     if (pCol->colIndex.columnIndex >= tscGetNumOfColumns(pTableMeta) || pColSchema->type < TSDB_DATA_TYPE_BOOL ||
         pColSchema->type > TSDB_DATA_TYPE_NCHAR) {
       tscError("%p sid:%d uid:%" PRIu64" id:%s, column index out of range, numOfColumns:%d, index:%d, column name:%s",
-          pSql, pTableMeta->sid, pTableMeta->uid, pTableMetaInfo->name, tscGetNumOfColumns(pTableMeta), pCol->colIndex,
+          pSql, pTableMeta->sid, pTableMeta->uid, pTableMetaInfo->name, tscGetNumOfColumns(pTableMeta), pCol->colIndex.columnIndex,
                pColSchema->name);
 
       return TSDB_CODE_TSC_INVALID_SQL;
@@ -783,7 +779,7 @@ int tscBuildQueryMsg(SSqlObj *pSql, SSqlInfo *pInfo) {
           (pColSchema->type < TSDB_DATA_TYPE_BOOL || pColSchema->type > TSDB_DATA_TYPE_NCHAR)) {
         tscError("%p sid:%d uid:%" PRIu64 " id:%s, tag index out of range, totalCols:%d, numOfTags:%d, index:%d, column name:%s",
                  pSql, pTableMeta->sid, pTableMeta->uid, pTableMetaInfo->name, total, numOfTagColumns,
-                 pCol->colIndex, pColSchema->name);
+                 pCol->colIndex.columnIndex, pColSchema->name);
 
         return TSDB_CODE_TSC_INVALID_SQL;
       }
@@ -982,7 +978,7 @@ int32_t tscBuildDropDbMsg(SSqlObj *pSql, SSqlInfo *pInfo) {
   SCMDropDbMsg *pDropDbMsg = (SCMDropDbMsg*)pCmd->payload;
 
   STableMetaInfo *pTableMetaInfo = tscGetTableMetaInfoFromCmd(pCmd, pCmd->clauseIndex, 0);
-  strncpy(pDropDbMsg->db, pTableMetaInfo->name, tListLen(pDropDbMsg->db));
+  tstrncpy(pDropDbMsg->db, pTableMetaInfo->name, sizeof(pDropDbMsg->db));
   pDropDbMsg->ignoreNotExists = pInfo->pDCLInfo->existsCheck ? 1 : 0;
 
   pCmd->msgType = TSDB_MSG_TYPE_CM_DROP_DB;
@@ -1052,7 +1048,7 @@ int32_t tscBuildDropAcctMsg(SSqlObj *pSql, SSqlInfo *pInfo) {
 
   SCMDropUserMsg *pDropMsg = (SCMDropUserMsg*)pCmd->payload;
   STableMetaInfo *pTableMetaInfo = tscGetTableMetaInfoFromCmd(pCmd, pCmd->clauseIndex, 0);
-  strcpy(pDropMsg->user, pTableMetaInfo->name);
+  tstrncpy(pDropMsg->user, pTableMetaInfo->name, sizeof(pDropMsg->user));
 
   return TSDB_CODE_SUCCESS;
 }
@@ -1812,6 +1808,7 @@ int tscProcessTableMetaRsp(SSqlObj *pSql) {
   
   // todo handle out of memory case
   if (pTableMetaInfo->pTableMeta == NULL) {
+    free(pTableMeta);
     return TSDB_CODE_TSC_OUT_OF_MEMORY;
   }
 
@@ -2324,6 +2321,7 @@ int tscGetSTableVgroupInfo(SSqlObj *pSql, int32_t clauseIndex) {
   
   SQueryInfo *pNewQueryInfo = NULL;
   if ((code = tscGetQueryInfoDetailSafely(&pNew->cmd, 0, &pNewQueryInfo)) != TSDB_CODE_SUCCESS) {
+    tscFreeSqlObj(pNew);
     return code;
   }
   
diff --git a/src/client/src/tscSql.c b/src/client/src/tscSql.c
index 126e34704c4596ad9a8fbc80efbad38c9bdaa06c..b13e7b7ccfb50a93806ab055897f7b1b49e61b17 100644
--- a/src/client/src/tscSql.c
+++ b/src/client/src/tscSql.c
@@ -584,7 +584,7 @@ char *taos_errstr(TAOS_RES *tres) {
 
 void taos_config(int debug, char *log_path) {
   uDebugFlag = debug;
-  strcpy(tsLogDir, log_path);
+  tstrncpy(tsLogDir, log_path, TSDB_FILENAME_LEN);
 }
 
 char *taos_get_server_info(TAOS *taos) {
@@ -719,6 +719,7 @@ int taos_validate_sql(TAOS *taos, const char *sql) {
   if (sqlLen > tsMaxSQLStringLen) {
     tscError("%p sql too long", pSql);
     pRes->code = TSDB_CODE_TSC_INVALID_SQL;
+    tfree(pSql);
     return pRes->code;
   }
 
@@ -727,6 +728,7 @@ int taos_validate_sql(TAOS *taos, const char *sql) {
     pRes->code = TSDB_CODE_TSC_OUT_OF_MEMORY;
     tscError("%p failed to malloc sql string buffer", pSql);
     tscTrace("%p Valid SQL result:%d, %s pObj:%p", pSql, pRes->code, taos_errstr(taos), pObj);
+    tfree(pSql);
     return pRes->code;
   }
 
@@ -851,6 +853,7 @@ int taos_load_table_info(TAOS *taos, const char *tableNameList) {
   if (tblListLen > MAX_TABLE_NAME_LENGTH) {
     tscError("%p tableNameList too long, length:%d, maximum allowed:%d", pSql, tblListLen, MAX_TABLE_NAME_LENGTH);
     pRes->code = TSDB_CODE_TSC_INVALID_SQL;
+    tfree(pSql);
     return pRes->code;
   }
 
@@ -858,6 +861,7 @@ int taos_load_table_info(TAOS *taos, const char *tableNameList) {
   if (str == NULL) {
     pRes->code = TSDB_CODE_TSC_OUT_OF_MEMORY;
     tscError("%p failed to malloc sql string buffer", pSql);
+    tfree(pSql);
     return pRes->code;
   }
 
@@ -873,6 +877,7 @@ int taos_load_table_info(TAOS *taos, const char *tableNameList) {
   free(str);
 
   if (pRes->code != TSDB_CODE_SUCCESS) {
+    tscFreeSqlObj(pSql);
     return pRes->code;
   }
 
diff --git a/src/client/src/tscStream.c b/src/client/src/tscStream.c
index 7ce86dc1a41a8fab22fc47883a4fd03ced1d6678..6fc934b6c00fa72a56d95aa06378925367f40bc0 100644
--- a/src/client/src/tscStream.c
+++ b/src/client/src/tscStream.c
@@ -125,7 +125,7 @@ static void tscProcessStreamTimer(void *handle, void *tmrId) {
   }
 
   // launch stream computing in a new thread
-  SSchedMsg schedMsg;
+  SSchedMsg schedMsg = { 0 };
   schedMsg.fp = tscProcessStreamLaunchQuery;
   schedMsg.ahandle = pStream;
   schedMsg.thandle = (void *)1;
@@ -239,7 +239,7 @@ static void tscProcessStreamRetrieveResult(void *param, TAOS_RES *res, int numOf
         /* no resuls in the query range, retry */
         // todo set retry dynamic time
         int32_t retry = tsProjectExecInterval;
-        tscError("%p stream:%p, retrieve no data, code:%d, retry in %" PRId64 "ms", pSql, pStream, numOfRows, retry);
+        tscError("%p stream:%p, retrieve no data, code:%d, retry in %" PRId32 "ms", pSql, pStream, numOfRows, retry);
 
         tscSetRetryTimer(pStream, pStream->pSql, retry);
         return;
@@ -250,7 +250,7 @@ static void tscProcessStreamRetrieveResult(void *param, TAOS_RES *res, int numOf
       }
     }
 
-    tscTrace("%p stream:%p, query on:%s, fetch result completed, fetched rows:%d", pSql, pStream, pTableMetaInfo->name,
+    tscTrace("%p stream:%p, query on:%s, fetch result completed, fetched rows:%" PRId64, pSql, pStream, pTableMetaInfo->name,
              pStream->numOfRes);
 
     // release the metric/meter meta information reference, so data in cache can be updated
diff --git a/src/client/src/tscSub.c b/src/client/src/tscSub.c
index 7e3aaf7fc534e99a87a00a3009026521986fe2da..15dc58a71320b7ebf8d83bd59ee06843ee71696c 100644
--- a/src/client/src/tscSub.c
+++ b/src/client/src/tscSub.c
@@ -291,7 +291,7 @@ static int tscLoadSubscriptionProgress(SSub* pSub) {
   fclose(fp);
 
   taosArraySort(progress, tscCompareSubscriptionProgress);
-  tscTrace("subscription progress loaded, %d tables: %s", taosArrayGetSize(progress), pSub->topic);
+  tscTrace("subscription progress loaded, %z tables: %s", taosArrayGetSize(progress), pSub->topic);
   return 1;
 }
 
@@ -350,7 +350,7 @@ TAOS_SUB *taos_subscribe(TAOS *taos, int restart, const char* topic, const char
 
   pSub->interval = interval;
   if (fp != NULL) {
-    tscTrace("asynchronize subscription, create new timer", topic);
+    tscTrace("asynchronize subscription, create new timer: %s", topic);
     pSub->fp = fp;
     pSub->param = param;
     taosTmrReset(tscProcessSubscriptionTimer, interval, pSub, tscTmr, &pSub->pTimer);
@@ -435,7 +435,9 @@ void taos_unsubscribe(TAOS_SUB *tsub, int keepProgress) {
   } else {
     char path[256];
     sprintf(path, "%s/subscribe/%s", tsDataDir, pSub->topic);
-    remove(path);
+    if (remove(path) != 0) {
+      tscError("failed to remove progress file, topic = %s, error = %s", pSub->topic, strerror(errno));
+    }
   }
 
   tscFreeSqlObj(pSub->pSql);
diff --git a/src/client/src/tscSubquery.c b/src/client/src/tscSubquery.c
index d25afcf00fd951e5f60d91226e106057114e159a..b0a66701c5730a8de8b66d5b1c9a259844e57f93 100644
--- a/src/client/src/tscSubquery.c
+++ b/src/client/src/tscSubquery.c
@@ -354,7 +354,7 @@ static int32_t tscLaunchSecondPhaseSubqueries(SSqlObj* pSql) {
     }
 
     size_t numOfCols = taosArrayGetSize(pNewQueryInfo->colList);
-    tscTrace("%p subquery:%p tableIndex:%d, vgroupIndex:%d, type:%d, exprInfo:%d, colList:%d, fieldsInfo:%d, name:%s",
+    tscTrace("%p subquery:%p tableIndex:%d, vgroupIndex:%d, type:%d, exprInfo:%z, colList:%z, fieldsInfo:%d, name:%s",
              pSql, pNew, 0, pTableMetaInfo->vgroupIndex, pNewQueryInfo->type, taosArrayGetSize(pNewQueryInfo->exprList),
              numOfCols, pNewQueryInfo->fieldsInfo.numOfOutput, pTableMetaInfo->name);
   }
@@ -551,7 +551,7 @@ static void issueTSCompQuery(SSqlObj* pSql, SJoinSupporter* pSupporter, SSqlObj*
   
   tscTrace(
       "%p subquery:%p tableIndex:%d, vgroupIndex:%d, numOfVgroups:%d, type:%d, ts_comp query to retrieve timestamps, "
-      "numOfExpr:%d, colList:%d, numOfOutputFields:%d, name:%s",
+      "numOfExpr:%z, colList:%z, numOfOutputFields:%d, name:%s",
       pParent, pSql, 0, pTableMetaInfo->vgroupIndex, pTableMetaInfo->vgroupList->numOfVgroups, pQueryInfo->type,
       tscSqlExprNumOfExprs(pQueryInfo), numOfCols, pQueryInfo->fieldsInfo.numOfOutput, pTableMetaInfo->name);
   
@@ -713,28 +713,31 @@ static void tidTagRetrieveCallback(void* param, TAOS_RES* tres, int32_t numOfRow
   if (taosArrayGetSize(s1) == 0 || taosArrayGetSize(s2) == 0) {  // no results,return.
     tscTrace("%p free all sub SqlObj and quit", pParentSql);
     freeJoinSubqueryObj(pParentSql);
-    return;
-  }
 
-  // proceed to for ts_comp query
-  SSqlCmd* pSubCmd1 = &pParentSql->pSubs[0]->cmd;
-  SSqlCmd* pSubCmd2 = &pParentSql->pSubs[1]->cmd;
+  } else {
+    // proceed to for ts_comp query
+    SSqlCmd* pSubCmd1 = &pParentSql->pSubs[0]->cmd;
+    SSqlCmd* pSubCmd2 = &pParentSql->pSubs[1]->cmd;
 
-  SQueryInfo*     pQueryInfo1 = tscGetQueryInfoDetail(pSubCmd1, 0);
-  STableMetaInfo* pTableMetaInfo1 = tscGetMetaInfo(pQueryInfo1, 0);
-  tscBuildVgroupTableInfo(pParentSql, pTableMetaInfo1, s1);
+    SQueryInfo*     pQueryInfo1 = tscGetQueryInfoDetail(pSubCmd1, 0);
+    STableMetaInfo* pTableMetaInfo1 = tscGetMetaInfo(pQueryInfo1, 0);
+    tscBuildVgroupTableInfo(pParentSql, pTableMetaInfo1, s1);
 
-  SQueryInfo*     pQueryInfo2 = tscGetQueryInfoDetail(pSubCmd2, 0);
-  STableMetaInfo* pTableMetaInfo2 = tscGetMetaInfo(pQueryInfo2, 0);
-  tscBuildVgroupTableInfo(pParentSql, pTableMetaInfo2, s2);
+    SQueryInfo*     pQueryInfo2 = tscGetQueryInfoDetail(pSubCmd2, 0);
+    STableMetaInfo* pTableMetaInfo2 = tscGetMetaInfo(pQueryInfo2, 0);
+    tscBuildVgroupTableInfo(pParentSql, pTableMetaInfo2, s2);
 
-  pSupporter->pState->numOfTotal = 2;
-  pSupporter->pState->numOfRemain = pSupporter->pState->numOfTotal;
+    pSupporter->pState->numOfTotal = 2;
+    pSupporter->pState->numOfRemain = pSupporter->pState->numOfTotal;
 
-  for (int32_t m = 0; m < pParentSql->numOfSubs; ++m) {
-    SSqlObj* sub = pParentSql->pSubs[m];
-    issueTSCompQuery(sub, sub->param, pParentSql);
+    for (int32_t m = 0; m < pParentSql->numOfSubs; ++m) {
+      SSqlObj* sub = pParentSql->pSubs[m];
+      issueTSCompQuery(sub, sub->param, pParentSql);
+    }
   }
+
+  taosArrayDestroy(s1);
+  taosArrayDestroy(s2);
 }
 
 static void tsCompRetrieveCallback(void* param, TAOS_RES* tres, int32_t numOfRows) {
@@ -1242,7 +1245,7 @@ int32_t tscLaunchJoinSubquery(SSqlObj *pSql, int16_t tableIndex, SJoinSupporter
   
       tscTrace(
           "%p subquery:%p tableIndex:%d, vgroupIndex:%d, type:%d, transfer to tid_tag query to retrieve (tableId, tags), "
-          "exprInfo:%d, colList:%d, fieldsInfo:%d, tagIndex:%d, name:%s",
+          "exprInfo:%z, colList:%z, fieldsInfo:%d, tagIndex:%d, name:%s",
           pSql, pNew, tableIndex, pTableMetaInfo->vgroupIndex, pNewQueryInfo->type, tscSqlExprNumOfExprs(pNewQueryInfo),
           numOfCols, pNewQueryInfo->fieldsInfo.numOfOutput, index.columnIndex, pNewQueryInfo->pTableMetaInfo[0]->name);
     } else {
@@ -1276,8 +1279,8 @@ int32_t tscLaunchJoinSubquery(SSqlObj *pSql, int16_t tableIndex, SJoinSupporter
       size_t numOfCols = taosArrayGetSize(pNewQueryInfo->colList);
 
       tscTrace(
-          "%p subquery:%p tableIndex:%d, vgroupIndex:%d, type:%d, transfer to ts_comp query to retrieve timestamps, "
-          "exprInfo:%d, colList:%d, fieldsInfo:%d, name:%s",
+          "%p subquery:%p tableIndex:%d, vgroupIndex:%d, type:%u, transfer to ts_comp query to retrieve timestamps, "
+          "exprInfo:%z, colList:%z, fieldsInfo:%d, name:%s",
           pSql, pNew, tableIndex, pTableMetaInfo->vgroupIndex, pNewQueryInfo->type, tscSqlExprNumOfExprs(pNewQueryInfo),
           numOfCols, pNewQueryInfo->fieldsInfo.numOfOutput, pNewQueryInfo->pTableMetaInfo[0]->name);
     }
@@ -1699,11 +1702,11 @@ static void tscRetrieveFromDnodeCallBack(void *param, TAOS_RES *tres, int numOfR
     assert(pRes->numOfRows == numOfRows);
     int64_t num = atomic_add_fetch_64(&pState->numOfRetrievedRows, numOfRows);
     
-    tscTrace("%p sub:%p retrieve numOfRows:%d totalNumOfRows:%d from ip:%s, orderOfSub:%d", pPObj, pSql,
+    tscTrace("%p sub:%p retrieve numOfRows:%" PRId64 " totalNumOfRows:%" PRIu64 " from ip:%s, orderOfSub:%d", pPObj, pSql,
              pRes->numOfRows, pState->numOfRetrievedRows, pSql->ipList.fqdn[pSql->ipList.inUse], idx);
     
     if (num > tsMaxNumOfOrderedResults && tscIsProjectionQueryOnSTable(pQueryInfo, 0)) {
-      tscError("%p sub:%p num of OrderedRes is too many, max allowed:%" PRId64 " , current:%" PRId64,
+      tscError("%p sub:%p num of OrderedRes is too many, max allowed:%" PRId32 " , current:%" PRId64,
                pPObj, pSql, tsMaxNumOfOrderedResults, num);
       tscAbortFurtherRetryRetrieval(trsupport, tres, TSDB_CODE_TSC_SORTED_RES_TOO_MANY);
       return;
@@ -1728,6 +1731,7 @@ static void tscRetrieveFromDnodeCallBack(void *param, TAOS_RES *tres, int numOfR
                                pRes->numOfRows, pQueryInfo->groupbyExpr.orderType);
     if (ret < 0) { // set no disk space error info, and abort retry
       tscAbortFurtherRetryRetrieval(trsupport, tres, TSDB_CODE_TSC_NO_DISKSPACE);
+      pthread_mutex_unlock(&trsupport->queryMutex);
       
     } else if (pRes->completed) {
       tscAllDataRetrievedFromDnode(trsupport, pSql);
@@ -1738,7 +1742,6 @@ static void tscRetrieveFromDnodeCallBack(void *param, TAOS_RES *tres, int numOfR
       taos_fetch_rows_a(tres, tscRetrieveFromDnodeCallBack, param);
     }
     
-    pthread_mutex_unlock(&trsupport->queryMutex);
   } else { // all data has been retrieved to client
     tscAllDataRetrievedFromDnode(trsupport, pSql);
   }
@@ -1827,7 +1830,7 @@ void tscRetrieveDataRes(void *param, TAOS_RES *tres, int code) {
   }
   
   if (pParentSql->res.code != TSDB_CODE_SUCCESS) {  // at least one peer subquery failed, abort current query
-    tscTrace("%p sub:%p query failed,ip:%u,vgId:%d,orderOfSub:%d,global code:%d", pParentSql, pSql,
+    tscTrace("%p sub:%p query failed,ip:%s,vgId:%d,orderOfSub:%d,global code:%d", pParentSql, pSql,
                pVgroup->ipAddr[0].fqdn, pVgroup->vgId, trsupport->subqueryIndex, pParentSql->res.code);
   
     tscHandleSubqueryError(param, tres, pParentSql->res.code);
diff --git a/src/client/src/tscSystem.c b/src/client/src/tscSystem.c
index bcd01a322e84f7d596a3f7715b687cba812c8410..a653b8383342d688d6b9ea42919ac4afe7b69423 100644
--- a/src/client/src/tscSystem.c
+++ b/src/client/src/tscSystem.c
@@ -220,7 +220,7 @@ static int taos_options_imp(TSDB_OPTION option, const char *pStr) {
 
         if (strlen(tsLocale) == 0) { // locale does not set yet
           char* defaultLocale = setlocale(LC_CTYPE, "");
-          strcpy(tsLocale, defaultLocale);
+          tstrncpy(tsLocale, defaultLocale, sizeof(tsLocale));
         }
 
         // set the user specified locale
@@ -304,7 +304,7 @@ static int taos_options_imp(TSDB_OPTION option, const char *pStr) {
       assert(cfg != NULL);
     
       if (cfg->cfgStatus <= TAOS_CFG_CSTATUS_OPTION) {
-        strcpy(tsTimezone, pStr);
+        tstrncpy(tsTimezone, pStr, sizeof(tsTimezone));
         tsSetTimeZone();
         cfg->cfgStatus = TAOS_CFG_CSTATUS_OPTION;
         tscTrace("timezone set:%s, input:%s by taos_options", tsTimezone, pStr);
diff --git a/src/client/src/tscUtil.c b/src/client/src/tscUtil.c
index 01f2bb7dd5d1bb82fc6368c901a27678791900f3..e65c9a8bdfc59ba39fe01408829fbe904e959454 100644
--- a/src/client/src/tscUtil.c
+++ b/src/client/src/tscUtil.c
@@ -1840,7 +1840,7 @@ SSqlObj* createSubqueryObj(SSqlObj* pSql, int16_t tableIndex, void (*fp)(), void
     size_t size = taosArrayGetSize(pNewQueryInfo->colList);
     
     tscTrace(
-        "%p new subquery:%p, tableIndex:%d, vgroupIndex:%d, type:%d, exprInfo:%d, colList:%d,"
+        "%p new subquery:%p, tableIndex:%d, vgroupIndex:%d, type:%d, exprInfo:%zu, colList:%zu,"
         "fieldInfo:%d, name:%s, qrang:%" PRId64 " - %" PRId64 " order:%d, limit:%" PRId64,
         pSql, pNew, tableIndex, pTableMetaInfo->vgroupIndex, pNewQueryInfo->type, tscSqlExprNumOfExprs(pNewQueryInfo),
         size, pNewQueryInfo->fieldsInfo.numOfOutput, pFinalInfo->name, pNewQueryInfo->window.skey,
@@ -2002,7 +2002,7 @@ void tscTryQueryNextVnode(SSqlObj* pSql, __async_cb_func_t fp) {
   
   int32_t totalVgroups = pTableMetaInfo->vgroupList->numOfVgroups;
   while (++pTableMetaInfo->vgroupIndex < totalVgroups) {
-    tscTrace("%p results from vgroup index:%d completed, try next:%d. total vgroups:%d. current numOfRes:%d", pSql,
+    tscTrace("%p results from vgroup index:%d completed, try next:%d. total vgroups:%d. current numOfRes:%" PRId64, pSql,
              pTableMetaInfo->vgroupIndex - 1, pTableMetaInfo->vgroupIndex, totalVgroups, pRes->numOfClauseTotal);
 
     /*
diff --git a/src/rpc/src/rpcMain.c b/src/rpc/src/rpcMain.c
index 989021eb52aec0c02e39f7b21da2b2758df3cea9..4a28cb4ff48e59976672300dca7fb71e56aa1e67 100644
--- a/src/rpc/src/rpcMain.c
+++ b/src/rpc/src/rpcMain.c
@@ -574,19 +574,15 @@ static void rpcReleaseConn(SRpcConn *pConn) {
     char hashstr[40] = {0};
     size_t size = snprintf(hashstr, sizeof(hashstr), "%x:%x:%x:%d", pConn->peerIp, pConn->linkUid, pConn->peerId, pConn->connType);
     taosHashRemove(pRpc->hash, hashstr, size);
-  
     rpcFreeMsg(pConn->pRspMsg); // it may have a response msg saved, but not request msg
-    pConn->pRspMsg = NULL;
-    pConn->inType = 0;
-    pConn->inTranId = 0;
-  } else {
-    pConn->outType = 0;
-    pConn->outTranId = 0;
-    pConn->pReqMsg = NULL;
-  }
-
-  taosFreeId(pRpc->idPool, pConn->sid);
-  pConn->pContext = NULL;
+  } 
+  
+  // lockedBy can not be reset, since it maybe hold by a thread
+  int sid = pConn->sid;
+  int64_t lockedBy = pConn->lockedBy; 
+  memset(pConn, 0, sizeof(SRpcConn));
+  pConn->lockedBy = lockedBy;
+  taosFreeId(pRpc->idPool, sid);
 
   tTrace("%s, rpc connection is released", pConn->info);
 }
@@ -611,7 +607,6 @@ static SRpcConn *rpcAllocateClientConn(SRpcInfo *pRpc) {
     terrno = TSDB_CODE_RPC_MAX_SESSIONS;
   } else {
     pConn = pRpc->connList + sid;
-    memset(pConn, 0, sizeof(SRpcConn));
 
     pConn->pRpc = pRpc;
     pConn->sid = sid;
diff --git a/src/util/inc/tutil.h b/src/util/inc/tutil.h
index c75ba24baabb2370417ef8e3d61b2023bbd3b109..bb74bafbdde89f64e5531735fa271a6afd52146d 100644
--- a/src/util/inc/tutil.h
+++ b/src/util/inc/tutil.h
@@ -117,6 +117,8 @@ extern "C" {
 
 #define POW2(x) ((x) * (x))
 
+int taosRand(void);
+
 int32_t strdequote(char *src);
 
 size_t strtrim(char *src);
diff --git a/src/util/src/tcache.c b/src/util/src/tcache.c
index 7aaa5b91db0f59cc7516b15051ba046153e0d135..48603a014e1479a5dfdd319f7b23f49669ee3f80 100644
--- a/src/util/src/tcache.c
+++ b/src/util/src/tcache.c
@@ -506,7 +506,7 @@ void taosAddToTrash(SCacheObj *pCacheObj, SCacheDataNode *pNode) {
 
 void taosRemoveFromTrashCan(SCacheObj *pCacheObj, STrashElem *pElem) {
   if (pElem->pData->signature != (uint64_t)pElem->pData) {
-    uError("key:sig:0x%x %p data has been released, ignore", pElem->pData->signature, pElem->pData);
+    uError("key:sig:0x%" PRIx64 " %p data has been released, ignore", pElem->pData->signature, pElem->pData);
     return;
   }
 
diff --git a/src/util/src/tconfig.c b/src/util/src/tconfig.c
index 2288035fc7a67edcc11995b69253afbf6fe465c7..bcea8d16543cb26e6b2c951c83382794f7cf291d 100644
--- a/src/util/src/tconfig.c
+++ b/src/util/src/tconfig.c
@@ -119,8 +119,13 @@ static void taosReadDirectoryConfig(SGlobalCfg *cfg, char *input_value) {
       struct stat dirstat;
       if (stat(option, &dirstat) < 0) {
         int code = mkdir(option, 0755);
-        uPrint("config option:%s, input value:%s, directory not exist, create with return code:%d",
-               cfg->option, input_value, code);
+        if (code < 0) {
+          uError("config option:%s, input value:%s, directory not exist, create fail with return code:%d",
+               cfg->option, input_value, code); 
+        } else {
+          uPrint("config option:%s, input value:%s, directory not exist, create with return code:%d",
+               cfg->option, input_value, code); 
+        }
       }
       cfg->cfgStatus = TAOS_CFG_CSTATUS_FILE;
     } else {
diff --git a/src/util/src/tdes.c b/src/util/src/tdes.c
index 3112fb411148925bf064b356df6e8dfc708ce86e..c76938d3aad47a416ee0a8e510d5ea3f7a6481c6 100644
--- a/src/util/src/tdes.c
+++ b/src/util/src/tdes.c
@@ -140,7 +140,7 @@ void print_char_as_binary(char input) {
 void generate_key(unsigned char* key) {
   int i;
   for (i = 0; i < 8; i++) {
-    key[i] = rand() % 255;
+    key[i] = taosRand() % 255;
   }
 }
 
diff --git a/src/util/src/tlog.c b/src/util/src/tlog.c
index d1fb287184d85a4e6c7c68aa972e7ea39b75614c..39ec89daf4986632f50b4e11c6051b36e4366b7a 100644
--- a/src/util/src/tlog.c
+++ b/src/util/src/tlog.c
@@ -233,7 +233,9 @@ static void taosGetLogFileName(char *fn) {
     }
   }
 
-  strcpy(tsLogObj.logName, fn);
+  if (strlen(fn) < LOG_FILE_NAME_LEN) {
+    strcpy(tsLogObj.logName, fn);
+  }
 }
 
 static int32_t taosOpenLogFile(char *fn, int32_t maxLines, int32_t maxFileNum) {
@@ -253,15 +255,20 @@ static int32_t taosOpenLogFile(char *fn, int32_t maxLines, int32_t maxFileNum) {
   tsLogObj.fileNum = maxFileNum;
   taosGetLogFileName(fn);
 
-  strcpy(name, fn);
-  strcat(name, ".0");
+  if (strlen(fn) < LOG_FILE_NAME_LEN + 50 - 2) {
+    strcpy(name, fn);
+    strcat(name, ".0");
+  }
 
   // if none of the log files exist, open 0, if both exists, open the old one
   if (stat(name, &logstat0) < 0) {
     tsLogObj.flag = 0;
   } else {
-    strcpy(name, fn);
-    strcat(name, ".1");
+    if (strlen(fn) < LOG_FILE_NAME_LEN + 50 - 2) {
+      strcpy(name, fn);
+      strcat(name, ".1");
+    }
+    
     if (stat(name, &logstat1) < 0) {
       tsLogObj.flag = 1;
     } else {
diff --git a/src/util/src/tnote.c b/src/util/src/tnote.c
index 5bb120d4c6bfe49fe2ebd16949c5633b6d6d218d..a8d9e8d416ce9c9ee2653a665ecb080930e2c7ab 100644
--- a/src/util/src/tnote.c
+++ b/src/util/src/tnote.c
@@ -169,7 +169,9 @@ void taosGetNoteName(char *fn, taosNoteInfo * pNote)
         }
     }
 
-    strcpy(pNote->taosNoteName, fn);
+    if (strlen(fn) < NOTE_FILE_NAME_LEN) {
+      strcpy(pNote->taosNoteName, fn);
+    }
 }
 
 int taosOpenNoteWithMaxLines(char *fn, int maxLines, int maxNoteNum, taosNoteInfo * pNote)
@@ -182,14 +184,18 @@ int taosOpenNoteWithMaxLines(char *fn, int maxLines, int maxNoteNum, taosNoteInf
     pNote->taosNoteFileNum = maxNoteNum;
     taosGetNoteName(fn, pNote);
 
+    if (strlen(fn) > NOTE_FILE_NAME_LEN * 2 - 2) {
+      fprintf(stderr, "the len of file name overflow:%s\n", fn);
+      return -1;
+    } 
+
     strcpy(name, fn);
     strcat(name, ".0");
 
     // if none of the note files exist, open 0, if both exists, open the old one
     if (stat(name, &notestat0) < 0) {
         pNote->taosNoteFlag = 0;
-    }
-    else {
+    } else {
         strcpy(name, fn);
         strcat(name, ".1");
         if (stat(name, &notestat1) < 0) {
diff --git a/src/util/src/tskiplist.c b/src/util/src/tskiplist.c
index f1f34818655bd0ca70d62f1dfe81a5fb14238a68..4872c9298aa58ebad9c118b343573f724e8c4021 100644
--- a/src/util/src/tskiplist.c
+++ b/src/util/src/tskiplist.c
@@ -38,7 +38,7 @@ static FORCE_INLINE int32_t getSkipListNodeRandomHeight(SSkipList *pSkipList) {
   const uint32_t factor = 4;
 
   int32_t n = 1;
-  while ((rand() % factor) == 0 && n <= pSkipList->maxLevel) {
+  while ((taosRand() % factor) == 0 && n <= pSkipList->maxLevel) {
     n++;
   }
 
diff --git a/src/util/src/tutil.c b/src/util/src/tutil.c
index 3b92cf21ee88003c48ee1e91587cac36ec17dcfd..a2edce2387b53d6f8cd864d3495ae1cd31fd60b5 100644
--- a/src/util/src/tutil.c
+++ b/src/util/src/tutil.c
@@ -27,6 +27,33 @@
 #include "tulog.h"
 #include "taoserror.h"
 
+
+#ifdef WINDOWS
+int taosRand(void)
+{
+  return rand();
+}
+#else
+int taosRand(void)
+{
+  int fd;
+  int seed;
+  
+  fd = open("/dev/urandom", 0);
+  if (fd < 0) {
+    seed = time(0);
+  } else {
+    int len = read(fd, &seed, sizeof(seed));
+    if (len < 0) {
+      seed = time(0);
+    }  
+    close(fd);
+  }
+
+  return seed;
+}
+#endif
+
 int32_t strdequote(char *z) {
   if (z == NULL) {
     return 0;
@@ -434,8 +461,10 @@ void getTmpfilePath(const char *fileNamePrefix, char *dstPath) {
   
   strcpy(tmpPath, tmpDir);
   strcat(tmpPath, tdengineTmpFileNamePrefix);
-  strcat(tmpPath, fileNamePrefix);
-  strcat(tmpPath, "-%d-%s");
+  if (strlen(tmpPath) + strlen(fileNamePrefix) + strlen("-%d-%s") < PATH_MAX) {
+    strcat(tmpPath, fileNamePrefix);
+    strcat(tmpPath, "-%d-%s");
+  }
   
   char rand[8] = {0};
   taosRandStr(rand, tListLen(rand) - 1);
@@ -447,7 +476,7 @@ void taosRandStr(char* str, int32_t size) {
   int32_t len = 39;
   
   for(int32_t i = 0; i < size; ++i) {
-    str[i] = set[rand()%len];
+    str[i] = set[taosRand()%len];
   }
 }
 
@@ -718,4 +747,4 @@ void taosRemoveDir(char *rootDir) {
   rmdir(rootDir);
 
   uPrint("dir:%s is removed", rootDir);
-}
\ No newline at end of file
+}
diff --git a/tests/script/general/parser/null_char.sim b/tests/script/general/parser/null_char.sim
index 6da419cd4c07a298996563089d86451d732c3883..09e761c85e68b1bc7a4464901080353936a4d8e5 100644
--- a/tests/script/general/parser/null_char.sim
+++ b/tests/script/general/parser/null_char.sim
@@ -206,68 +206,70 @@ endi
 
 ################# binary
 sql alter table st41 set tag tag_binary = "shanghai"
-sql describe st41
-if $data23 != shanghai then
+sql select tag_binary, tag_nchar, tag_int, tag_bool, tag_float, tag_double from  st41
+if $data00 != shanghai then
   return -1
 endi
+
 ##### test 'space' case
-#$tagvalue = '
-#$tagvalue = $tagvalue '
-#sql alter table st41 set tag tag_binary = $tagvalue
+system_content echo '   ' | sed 's/ //g' | tr -d '\n' # Construct an empty result for later result checking
 sql alter table st41 set tag tag_binary = ""
-#sql describe st41
-#if $data23 != $tagvalue then
-#  return -1
-#endi
+sql select tag_binary, tag_nchar, tag_int, tag_bool, tag_float, tag_double from  st41
+if $data00 != $system_content  then
+  print expect [ $system_content ], actual [ $data00 ]
+  return -1
+endi
+
 sql alter table st41 set tag tag_binary = "NULL"
-sql describe st41
-if $data23 != NULL then
+sql select tag_binary, tag_nchar, tag_int, tag_bool, tag_float, tag_double from  st41
+if $data00 != NULL then
   return -1
 endi
+
 sql alter table st41 set tag tag_binary = NULL
-sql describe st41
-if $data23 != NULL then
+sql select tag_binary, tag_nchar, tag_int, tag_bool, tag_float, tag_double from  st41
+if $data00 != NULL then
   print ==8== expect: NULL, actually: $data23
   return -1
 endi
 
 ################### nchar
 sql alter table st41 set tag tag_nchar = "��˼����"
-sql describe st41
+sql select tag_binary, tag_nchar, tag_int, tag_bool, tag_float, tag_double from  st41
 #sleep 1000
-#if $data33 != ��˼���� then
-#  print ==== expect ��˼����, actually $data33
+#if $data01 != ��˼���� then
+#  print ==== expect ��˼����, actually $data01
 #  return -1
 #endi
 ##### test 'space' case
 #$tagvalue = '
 #$tagvalue = $tagvalue '
 sql alter table st41 set tag tag_nchar = ''
-#sql describe st41
-#if $data33 != $tagvalue then
+#sql select tag_binary, tag_nchar, tag_int, tag_bool, tag_float, tag_double from  st41
+#if $data01 != $tagvalue then
 #  return -1
 #endi
 sql alter table st41 set tag tag_nchar = "NULL"
-sql describe st41
-if $data33 != NULL then
+sql select tag_binary, tag_nchar, tag_int, tag_bool, tag_float, tag_double from  st41
+if $data01 != NULL then
   return -1
 endi
 sql alter table st41 set tag tag_nchar = NULL
-#sql describe st41
-#if $data33 !=   then
-#  print ==9== expect  , actually $data33
+#sql select tag_binary, tag_nchar, tag_int, tag_bool, tag_float, tag_double from  st41
+#if $data01 !=   then
+#  print ==9== expect  , actually $data01
 #   return -1
 #endi
 
 ################### int
 sql alter table st41 set tag tag_int = -2147483647
-sql describe st41
-if $data43 != -2147483647 then
+sql select tag_binary, tag_nchar, tag_int, tag_bool, tag_float, tag_double from  st41
+if $data02 != -2147483647 then
   return -1
 endi
 sql alter table st41 set tag tag_int = 2147483647
-sql describe st41
-if $data43 != 2147483647 then
+sql select tag_binary, tag_nchar, tag_int, tag_bool, tag_float, tag_double from  st41
+if $data02 != 2147483647 then
   return -1
 endi
 
@@ -275,19 +277,19 @@ sql_error alter table st41 set tag tag_int = -2147483648
 sql_error alter table st41 set tag tag_int = 2147483648
 
 sql alter table st41 set tag tag_int = '-379'
-sql describe st41
-if $data43 != -379 then
+sql select tag_binary, tag_nchar, tag_int, tag_bool, tag_float, tag_double from  st41
+if $data02 != -379 then
   return -1
 endi
 sql alter table st41 set tag tag_int = -2000
-sql describe st41
-if $data43 != -2000 then
+sql select tag_binary, tag_nchar, tag_int, tag_bool, tag_float, tag_double from  st41
+if $data02 != -2000 then
   return -1
 endi
 sql alter table st41 set tag tag_int = NULL
-sql describe st41
-if $data43 != NULL then
-  print ==10== expect: NULL, actually: $data43
+sql select tag_binary, tag_nchar, tag_int, tag_bool, tag_float, tag_double from  st41
+if $data02 != NULL then
+  print ==10== expect: NULL, actually: $data02
   return -1
 endi
 sql alter table st41 set tag tag_int = 'NULL'
@@ -296,34 +298,34 @@ sql_error alter table st41 set tag tag_int = abc379
 
 ################### bool
 sql alter table st41 set tag tag_bool = 'true'
-sql describe st41
-if $data53 != true then
+sql select tag_binary, tag_nchar, tag_int, tag_bool, tag_float, tag_double from  st41
+if $data03 != 1 then
   return -1
 endi
 sql alter table st41 set tag tag_bool = 'false'
-sql describe st41
-if $data53 != false then
+sql select tag_binary, tag_nchar, tag_int, tag_bool, tag_float, tag_double from  st41
+if $data03 != 0 then
   return -1
 endi
 sql alter table st41 set tag tag_bool = 0
-sql describe st41
-if $data53 != false then
+sql select tag_binary, tag_nchar, tag_int, tag_bool, tag_float, tag_double from  st41
+if $data03 != 0 then
   return -1
 endi
 sql alter table st41 set tag tag_bool = 123
-sql describe st41
-if $data53 != true then
+sql select tag_binary, tag_nchar, tag_int, tag_bool, tag_float, tag_double from  st41
+if $data03 != 1 then
   return -1
 endi
 sql alter table st41 set tag tag_bool = 'NULL'
-sql describe st41
-if $data53 != NULL then
-  print ==14== expect: NULL, actually: $data53
+sql select tag_binary, tag_nchar, tag_int, tag_bool, tag_float, tag_double from  st41
+if $data03 != NULL then
+  print ==14== expect: NULL, actually: $data03
   return -1
 endi
 sql alter table st41 set tag tag_bool = NULL
-sql describe st41
-if $data53 != NULL then
+sql select tag_binary, tag_nchar, tag_int, tag_bool, tag_float, tag_double from  st41
+if $data03 != NULL then
   return -1
 endi
 
@@ -333,50 +335,51 @@ sql_error alter table st41 set tag tag_bool = abc379
 
 ################### float
 sql alter table st41 set tag tag_float = -32
-sql describe st41
-if $data63 != -32.000000 then
+sql select tag_binary, tag_nchar, tag_int, tag_bool, tag_float, tag_double from  st41
+if $data04 != -32.00000 then
+  print expect -32.00000 actual $data04
   return -1
 endi
 sql alter table st41 set tag tag_float = 54.123456
-sql describe st41
-if $data63 != 54.123455 then
-  print ==15== expect: 54.123455, actually: $data63
+sql select tag_binary, tag_nchar, tag_int, tag_bool, tag_float, tag_double from  st41
+if $data04 != 54.123455 then
+  print ==15== expect: 54.123455, actually: $data04
 #  return -1
 endi
 sql alter table st41 set tag tag_float = 54.12345
-sql describe st41
-if $data63 != 54.123451 then
-  print ==16== expect: 54.123451, actually: $data63
+sql select tag_binary, tag_nchar, tag_int, tag_bool, tag_float, tag_double from  st41
+if $data04 != 54.12345 then
+  print ==16== expect: 54.12345, actually: $data04
   return -1
 endi
 sql alter table st41 set tag tag_float = 54.12345678
-sql describe st41
-if $data63 != 54.123455 then
-  print ==11== expect: 54.123455, actually : $data63
+sql select tag_binary, tag_nchar, tag_int, tag_bool, tag_float, tag_double from  st41
+if $data04 != 54.12346 then
+  print ==11== expect: 54.12346, actually : $data04
   return -1
 endi
 sql alter table st41 set tag tag_float = NULL
-sql describe st41
-if $data63 != NULL then
-  print ==12== expect: NULL, actually : $data63
+sql select tag_binary, tag_nchar, tag_int, tag_bool, tag_float, tag_double from  st41
+if $data04 != NULL then
+  print ==12== expect: NULL, actually : $data04
   return -1
 endi
 sql alter table st41 set tag tag_float = 'NULL'
-sql describe st41
-if $data63 != NULL then
-  print ==17== expect: NULL, actually : $data63
+sql select tag_binary, tag_nchar, tag_int, tag_bool, tag_float, tag_double from  st41
+if $data04 != NULL then
+  print ==17== expect: NULL, actually : $data04
   return -1
 endi
 sql alter table st41 set tag tag_float = '54.123456'
-sql describe st41
-if $data63 != 54.123455 then
-  print ==18== expect: 54.123455, actually : $data63
+sql select tag_binary, tag_nchar, tag_int, tag_bool, tag_float, tag_double from  st41
+if $data04 != 54.12346 then
+  print ==18== expect: 54.12346, actually : $data04
   return -1
 endi
 sql alter table st41 set tag tag_float = '-54.123456'
-sql describe st41
-if $data63 != -54.123455 then
-  print ==19== expect: -54.123455, actually : $data63
+sql select tag_binary, tag_nchar, tag_int, tag_bool, tag_float, tag_double from  st41
+if $data04 != -54.12346 then
+  print ==19== expect: -54.12346, actually : $data04
   return -1
 endi
 sql_error alter table st41 set tag tag_float = ''
@@ -387,30 +390,32 @@ sql_error alter table st41 set tag tag_float = abc
 
 ################### double
 sql alter table st41 set tag tag_double = -92
-sql describe st41
-if $data73 != -92.000000 then
+sql select tag_binary, tag_nchar, tag_int, tag_bool, tag_float, tag_double from  st41
+if $data05 != -92.000000000 then
+  print expect -92.000000000 actual $data05
   return -1
 endi
 sql alter table st41 set tag tag_double = 184
-sql describe st41
-if $data73 != 184.000000 then
+sql select tag_binary, tag_nchar, tag_int, tag_bool, tag_float, tag_double from  st41
+if $data05 != 184.000000000 then
+  print expect 184.000000000 actual $data05
   return -1
 endi
 sql alter table st41 set tag tag_double = '-2456'
-sql describe st41
-if $data73 != -2456.000000 then
+sql select tag_binary, tag_nchar, tag_int, tag_bool, tag_float, tag_double from  st41
+if $data05 != -2456.000000000 then
   return -1
 endi
 sql alter table st41 set tag tag_double = NULL
-sql describe st41
-if $data73 != NULL then
-  print ==13== expect: NULL, actually : $data73
+sql select tag_binary, tag_nchar, tag_int, tag_bool, tag_float, tag_double from  st41
+if $data05 != NULL then
+  print ==13== expect: NULL, actually : $data05
   return -1
 endi
 sql alter table st41 set tag tag_double = 'NULL'
-sql describe st41
-if $data73 != NULL then
-  print ==20== expect: NULL, actually : $data73
+sql select tag_binary, tag_nchar, tag_int, tag_bool, tag_float, tag_double from  st41
+if $data05 != NULL then
+  print ==20== expect: NULL, actually : $data05
   return -1
 endi
 sql_error alter table st41 set tag tag_double = ''
@@ -427,23 +432,22 @@ sql alter table st51 set tag tag_bigint = '-379'
 sql alter table st51 set tag tag_bigint = -2000
 sql alter table st51 set tag tag_bigint = NULL
 sql alter table st51 set tag tag_bigint = 9223372036854775807
-sql describe st51
-if $data23 != 9223372036854775807 then
+sql select tag_bigint, tag_smallint, tag_tinyint from st51
+if $data00 != 9223372036854775807 then
   return -1
 endi
 sql alter table st51 set tag tag_bigint = 9223372036854775808
-sql describe st51
-if $data23 != 9223372036854775807 then
+sql select tag_bigint, tag_smallint, tag_tinyint from st51
+if $data00 != 9223372036854775807 then
   return -1
 endi
 sql alter table st51 set tag tag_bigint = -9223372036854775807
-sql describe st51
-if $data23 != -9223372036854775807 then
+sql select tag_bigint, tag_smallint, tag_tinyint from st51
+if $data00 != -9223372036854775807 then
   return -1
 endi
 sql_error alter table st51 set tag tag_bigint = -9223372036854775808
 
-
 sql alter table st51 set tag tag_bigint = 'NULL'
 sql_error alter table st51 set tag tag_bigint = ''
 sql_error alter table st51 set tag tag_bigint = abc379
@@ -452,15 +456,15 @@ sql_error alter table st51 set tag tag_bigint = abc379
 sql alter table st51 set tag tag_smallint = -2000
 sql alter table st51 set tag tag_smallint = NULL
 sql alter table st51 set tag tag_smallint = 32767
-sql describe st51
-if $data33 != 32767 then
+sql select tag_bigint, tag_smallint, tag_tinyint from st51
+if $data01 != 32767 then
   return -1
 endi
 sql_error alter table st51 set tag tag_smallint = 32768
 
 sql alter table st51 set tag tag_smallint = -32767
-sql describe st51
-if $data33 != -32767 then
+sql select tag_bigint, tag_smallint, tag_tinyint from st51
+if $data01 != -32767 then
   return -1
 endi
 sql_error alter table st51 set tag tag_smallint = -32768
@@ -473,13 +477,13 @@ sql_error alter table st51 set tag tag_smallint = abc379
 sql alter table st51 set tag tag_tinyint = -127
 sql alter table st51 set tag tag_tinyint = NULL
 sql alter table st51 set tag tag_tinyint = 127
-sql describe st51
-if $data43 != 127 then
+sql select tag_bigint, tag_smallint, tag_tinyint from st51
+if $data02 != 127 then
   return -1
 endi
 sql alter table st51 set tag tag_tinyint = -127
-sql describe st51
-if $data43 != -127 then
+sql select tag_bigint, tag_smallint, tag_tinyint from st51
+if $data02 != -127 then
   return -1
 endi
 sql_error alter table st51 set tag tag_tinyint = '-128'
@@ -493,4 +497,4 @@ sql_error alter table st51 set tag tag_tinyint = abc379
 #sql drop database $db
 
 
-system sh/exec.sh -n dnode1 -s stop -x SIGINT
\ No newline at end of file
+system sh/exec.sh -n dnode1 -s stop -x SIGINT
diff --git a/tests/script/jenkins/basic.txt b/tests/script/jenkins/basic.txt
index 673022e0c6ddfe9fed2a339ca2676b1b4c25847b..79cb1551e1c37a9ffe30782db886ee5849dbfd95 100644
--- a/tests/script/jenkins/basic.txt
+++ b/tests/script/jenkins/basic.txt
@@ -120,7 +120,7 @@ cd ../../../debug; make
 #./test.sh -f general/parser/import_file.sim
 ./test.sh -f general/parser/lastrow.sim
 ./test.sh -f general/parser/nchar.sim
-#./test.sh -f general/parser/null_char.sim
+./test.sh -f general/parser/null_char.sim
 ./test.sh -f general/parser/single_row_in_tb.sim
 ./test.sh -f general/parser/select_from_cache_disk.sim
 ./test.sh -f general/parser/mixed_blocks.sim