diff --git a/.travis.yml b/.travis.yml
index 8c57085296041effcbbfee76e868e0eeb85c2407..9aac6c597cd9608c293b3d0f9b49c0db3fa5d9a4 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -34,6 +34,7 @@ matrix:
           - psmisc
           - unixodbc
           - unixodbc-dev
+          - mono-complete
 
     before_script:
       - export TZ=Asia/Harbin
@@ -59,6 +60,18 @@ matrix:
           pip3 install guppy3
           pip3 install --user ${TRAVIS_BUILD_DIR}/src/connector/python/linux/python3/
 
+          cd ${TRAVIS_BUILD_DIR}/tests/examples/C#/taosdemo
+          mcs -out:taosdemo *.cs || travis_terminate $?
+          pkill -TERM -x taosd
+          fuser -k -n tcp 6030
+          sleep 1
+          ${TRAVIS_BUILD_DIR}/debug/build/bin/taosd -c ${TRAVIS_BUILD_DIR}/debug/test/cfg > /dev/null &
+          sleep 5
+          mono taosdemo -Q DEFAULT -y || travis_terminate $?
+          pkill -KILL -x taosd
+          fuser -k -n tcp 6030
+          sleep 1
+
           cd ${TRAVIS_BUILD_DIR}/tests
           ./test-all.sh smoke || travis_terminate $?
           sleep 1
@@ -74,6 +87,7 @@ matrix:
           ./valgrind-test.sh 2>&1 > mem-error-out.log
           sleep 1
 
+
           # Color setting
           RED='\033[0;31m'
           GREEN='\033[1;32m'
diff --git a/CMakeLists.txt b/CMakeLists.txt
index eb2b1cceb48ec05e93bf20174e00169ca132a58a..0c474a355dc68e7ef3b1fcba0588de1060487540 100755
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
+CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
 IF (CMAKE_VERSION VERSION_LESS 3.0)
   PROJECT(TDengine CXX)
   SET(PROJECT_VERSION_MAJOR "${LIB_MAJOR_VERSION}")
diff --git a/deps/CMakeLists.txt b/deps/CMakeLists.txt
index 8c6c73c4400da973726109aa66a50c97e3a2a6f6..1d725add214f0e96d1a60aa9b889899790a4aef1 100644
--- a/deps/CMakeLists.txt
+++ b/deps/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
+CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
 PROJECT(TDengine)
 
 ADD_SUBDIRECTORY(zlib-1.2.11)
diff --git a/deps/MQTT-C/CMakeLists.txt b/deps/MQTT-C/CMakeLists.txt
index 15b35525210ec90e6e2efbdcd0e6128cb4d34f91..36ede467acfa05f893cbe99ed518458d57986c79 100644
--- a/deps/MQTT-C/CMakeLists.txt
+++ b/deps/MQTT-C/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
+CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
 
 # MQTT-C build options
 option(MQTT_C_OpenSSL_SUPPORT "Build MQTT-C with OpenSSL support?" OFF)
diff --git a/deps/MsvcLibX/CMakeLists.txt b/deps/MsvcLibX/CMakeLists.txt
index 4428579e1c098425c9d72d7d58a5fda15cd34c93..c02e4c7a4d89cdf657756ec9786d5a624419d182 100644
--- a/deps/MsvcLibX/CMakeLists.txt
+++ b/deps/MsvcLibX/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
+CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
 PROJECT(TDengine)
 
 IF (TD_WINDOWS)
diff --git a/deps/iconv/CMakeLists.txt b/deps/iconv/CMakeLists.txt
index 286070fa9071f8fcd1949850cec87c1ced3245d7..f26f109735ee81bc999b9539185ce60ccb976bfd 100644
--- a/deps/iconv/CMakeLists.txt
+++ b/deps/iconv/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
+CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
 PROJECT(TDengine)
 
 IF (TD_WINDOWS)
diff --git a/deps/pthread/CMakeLists.txt b/deps/pthread/CMakeLists.txt
index 04e5be7472a9b8cbdb384348697b919bf2dd0ece..dcd9ed035814ac9efd66340b58b287ccbabe61df 100644
--- a/deps/pthread/CMakeLists.txt
+++ b/deps/pthread/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
+CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
 PROJECT(TDengine)
 
 IF (TD_WINDOWS)
diff --git a/deps/regex/CMakeLists.txt b/deps/regex/CMakeLists.txt
index 054b093d07c386d7ff9b0ffc4c05909d79b33129..c7e983b992fe8a2dd21b8420e652358976663a37 100644
--- a/deps/regex/CMakeLists.txt
+++ b/deps/regex/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
+CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
 PROJECT(TDengine)
 
 IF (TD_WINDOWS)
diff --git a/deps/wepoll/CMakeLists.txt b/deps/wepoll/CMakeLists.txt
index a81fd782bbc4b05a1158273a7fcc6701bc4d980d..a8b34112215fae0df7bcac034622015fd72d337b 100644
--- a/deps/wepoll/CMakeLists.txt
+++ b/deps/wepoll/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
+CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
 PROJECT(TDengine)
 
 IF (TD_WINDOWS)
diff --git a/deps/zlib-1.2.11/CMakeLists.txt b/deps/zlib-1.2.11/CMakeLists.txt
index f83aa70085491fb6575c0a6bf93252192cddd040..a8750471d694bcfa98b711348861449e3fc7b23a 100644
--- a/deps/zlib-1.2.11/CMakeLists.txt
+++ b/deps/zlib-1.2.11/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
+CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
 PROJECT(TDengine)
 
 IF (TD_WINDOWS)
diff --git a/documentation20/webdocs/markdowndocs/TAOS SQL-ch.md b/documentation20/webdocs/markdowndocs/TAOS SQL-ch.md
index f879c66e4e0d63c512abac3ebe54a2b290683097..b75ef6b190d6e576c071f6c864e59580c2dc4e4b 100644
--- a/documentation20/webdocs/markdowndocs/TAOS SQL-ch.md	
+++ b/documentation20/webdocs/markdowndocs/TAOS SQL-ch.md	
@@ -131,7 +131,7 @@ TDengine缺省的时间戳是毫秒精度，但通过修改配置参数enableMic
     ```
     说明：
     1) 表的第一个字段必须是TIMESTAMP，并且系统自动将其设为主键；
-    2) 表名最大长度为193；
+    2) 表名最大长度为192；
     3) 表的每行长度不能超过16k个字符;
     4) 子表名只能由字母、数字和下划线组成，且不能以数字开头
     5) 使用数据类型binary或nchar，需指定其最长的字节数，如binary(20)，表示20字节；
@@ -139,10 +139,18 @@ TDengine缺省的时间戳是毫秒精度，但通过修改配置参数enableMic
 - **以超级表为模板创建数据表**
 
     ```mysql
-    CREATE TABLE [IF NOT EXISTS] tb_name USING stb_name TAGS (tag_value1 [, tag_value2 ...]);
+    CREATE TABLE [IF NOT EXISTS] tb_name USING stb_name TAGS (tag_value1, ...);
     ```
     以指定的超级表为模板，指定 tags 的值来创建数据表。
 
+- **批量创建数据表**
+
+    ```mysql
+    CREATE TABLE [IF NOT EXISTS] tb_name1 USING stb_name TAGS (tag_value1, ...) tb_name2 USING stb_name TAGS (tag_value2, ...) ...;
+    ```
+    以更快的速度批量创建大量数据表。（服务器端 2.0.14 及以上版本）
+    说明：批量建表方式要求数据表必须以超级表为模板。
+
 - **删除数据表**
 
     ```mysql
@@ -155,7 +163,9 @@ TDengine缺省的时间戳是毫秒精度，但通过修改配置参数enableMic
     SHOW TABLES [LIKE tb_name_wildcar];
     ```
 
-    显示当前数据库下的所有数据表信息。说明：可在 like 中使用通配符进行名称的匹配。 通配符匹配：1）“%”（百分号）匹配 0 到任意个字符；2）“\_”（下划线）匹配一个字符。
+    显示当前数据库下的所有数据表信息。
+    说明：可在like中使用通配符进行名称的匹配，这一通配符字符串最长不能超过24字节。
+    通配符匹配：1）’%’ (百分号)匹配0到任意个字符；2）’\_’下划线匹配一个字符。
 
 - **在线修改显示字符宽度**
 
@@ -176,7 +186,7 @@ TDengine缺省的时间戳是毫秒精度，但通过修改配置参数enableMic
     ```
     说明：
     1) 列的最大个数为1024，最小个数为2；
-    2) 列名最大长度为65；
+    2) 列名最大长度为64；
 
 - **表删除列**
 
@@ -655,7 +665,6 @@ TDengine支持针对数据的聚合查询。提供支持的聚合和选择函数
     功能说明：时间加权平均函数。统计表/超级表中某列在一段时间内的时间加权平均。
     返回结果数据类型：双精度浮点数Double。
     应用字段：不能应用在timestamp、binary、nchar、bool类型字段。
-    说明：时间加权平均（time weighted average, TWA）查询需要指定查询时间段的 _开始时间_ 和 _结束时间_ 。
     适用于：表、超级表。
 
 - **SUM**
diff --git a/packaging/cfg/taos.cfg b/packaging/cfg/taos.cfg
index 73fa915abdde8e0940f142fc56124f66e32a6d25..ccce496d2dc0767ed65b54415d6c9b096a839875 100644
--- a/packaging/cfg/taos.cfg
+++ b/packaging/cfg/taos.cfg
@@ -72,9 +72,6 @@
 # time interval of heart beat from shell to dnode, seconds
 # shellActivityTimer        3
 
-# time of keeping table meta data in cache, seconds
-# tableMetaKeepTimer        7200
-
 # minimum sliding window time, milli-second
 # minSlidingTime            10
 
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 931a0a132e86b94cb78bf6df553ffdf8e9920abb..04bc61ed9e1ca0eb0480bc13d1a9731827e0239e 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
+CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
 PROJECT(TDengine)
 
 # Base compile
diff --git a/src/balance/CMakeLists.txt b/src/balance/CMakeLists.txt
index 6c26e50b873d30b95c67a7988e83140106f609eb..fdc43ea32fd8913b984005f30621a801e50c45d4 100644
--- a/src/balance/CMakeLists.txt
+++ b/src/balance/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
+CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
 PROJECT(TDengine)
 
 INCLUDE_DIRECTORIES(${TD_COMMUNITY_DIR}/src/mnode/inc)
diff --git a/src/client/CMakeLists.txt b/src/client/CMakeLists.txt
index daf7c5e5349f42730721b3f2b6baad5d0485361e..4049c0d72908486d289631362c19e7caa25f99f8 100644
--- a/src/client/CMakeLists.txt
+++ b/src/client/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
+CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
 PROJECT(TDengine)
 
 INCLUDE_DIRECTORIES(inc)
diff --git a/src/client/inc/tscSubquery.h b/src/client/inc/tscSubquery.h
index d3996ccf7fe85a6405addfcbef023aa2ae6bf08b..43c9b009bfdc537b033b7cffbe00bb673c627847 100644
--- a/src/client/inc/tscSubquery.h
+++ b/src/client/inc/tscSubquery.h
@@ -43,6 +43,11 @@ TAOS_ROW doSetResultRowData(SSqlObj *pSql);
 
 char *getArithmeticInputSrc(void *param, const char *name, int32_t colId);
 
+void tscLockByThread(int64_t *lockedBy);
+
+void tscUnlockByThread(int64_t *lockedBy);
+
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/src/client/inc/tsclient.h b/src/client/inc/tsclient.h
index a3a086ce779701e8a7c31c3c7fb4e398f95d97ba..900fab53a2f6c93933f50e11307d92ce7393960c 100644
--- a/src/client/inc/tsclient.h
+++ b/src/client/inc/tsclient.h
@@ -300,8 +300,8 @@ typedef struct STscObj {
   void *             pTimer;
   char               user[TSDB_USER_LEN];
   char               pass[TSDB_KEY_LEN];
-  char               acctId[TSDB_ACCT_LEN];
-  char               db[TSDB_ACCT_LEN + TSDB_DB_NAME_LEN];
+  char               acctId[TSDB_ACCT_ID_LEN];
+  char               db[TSDB_ACCT_ID_LEN + TSDB_DB_NAME_LEN];
   char               sversion[TSDB_VERSION_LEN];
   char               writeAuth : 1;
   char               superAuth : 1;
@@ -347,6 +347,11 @@ typedef struct SSqlObj {
   SSubqueryState   subState;
   struct SSqlObj **pSubs;
 
+  int64_t          metaRid;
+  int64_t          svgroupRid;
+
+  int64_t          squeryLock;
+
   struct SSqlObj  *prev, *next;
   int64_t          self;
 } SSqlObj;
diff --git a/src/client/src/tscAsync.c b/src/client/src/tscAsync.c
index b4dd8d77148e4289fcd94fe195f29b858a2c8067..37207858a80786d60c97397bb7d579be0e25d685 100644
--- a/src/client/src/tscAsync.c
+++ b/src/client/src/tscAsync.c
@@ -402,8 +402,10 @@ void tscAsyncResultOnError(SSqlObj *pSql) {
 int tscSendMsgToServer(SSqlObj *pSql);
 
 void tscTableMetaCallBack(void *param, TAOS_RES *res, int code) {
-  SSqlObj *pSql = (SSqlObj *)param;
-  if (pSql == NULL || pSql->signature != pSql) return;
+  SSqlObj* pSql = (SSqlObj*)taosAcquireRef(tscObjRef, (int64_t)param);
+  if (pSql == NULL) return;
+
+  assert(pSql->signature == pSql && (int64_t)param == pSql->self);
 
   SSqlCmd *pCmd = &pSql->cmd;
   SSqlRes *pRes = &pSql->res;
@@ -428,7 +430,8 @@ void tscTableMetaCallBack(void *param, TAOS_RES *res, int code) {
       code = tscGetTableMeta(pSql, pTableMetaInfo);
       assert(code == TSDB_CODE_TSC_ACTION_IN_PROGRESS || code == TSDB_CODE_SUCCESS);
 
-      if (code == TSDB_CODE_TSC_ACTION_IN_PROGRESS) {
+      if (code == TSDB_CODE_TSC_ACTION_IN_PROGRESS) {        
+        taosReleaseRef(tscObjRef, pSql->self);
         return;
       }
 
@@ -436,6 +439,7 @@ void tscTableMetaCallBack(void *param, TAOS_RES *res, int code) {
 
       // tscProcessSql can add error into async res
       tscProcessSql(pSql);
+      taosReleaseRef(tscObjRef, pSql->self);
       return;
     } else {  // continue to process normal async query
       if (pCmd->parseFinished) {
@@ -446,6 +450,7 @@ void tscTableMetaCallBack(void *param, TAOS_RES *res, int code) {
 
         assert(code == TSDB_CODE_TSC_ACTION_IN_PROGRESS || code == TSDB_CODE_SUCCESS);
         if (code == TSDB_CODE_TSC_ACTION_IN_PROGRESS) {
+          taosReleaseRef(tscObjRef, pSql->self);
           return;
         }
 
@@ -458,6 +463,7 @@ void tscTableMetaCallBack(void *param, TAOS_RES *res, int code) {
 
           code = tsParseSql(pSql, true);
           if (code == TSDB_CODE_TSC_ACTION_IN_PROGRESS) {
+            taosReleaseRef(tscObjRef, pSql->self);
             return;
           } else if (code != TSDB_CODE_SUCCESS) {
             goto _error;
@@ -468,12 +474,14 @@ void tscTableMetaCallBack(void *param, TAOS_RES *res, int code) {
           tscProcessSql(pSql);
         }
 
+        taosReleaseRef(tscObjRef, pSql->self);
         return;
       } else {
         tscDebug("%p continue parse sql after get table meta", pSql);
 
         code = tsParseSql(pSql, false);
         if (code == TSDB_CODE_TSC_ACTION_IN_PROGRESS) {
+          taosReleaseRef(tscObjRef, pSql->self);
           return;
         } else if (code != TSDB_CODE_SUCCESS) {
           goto _error;
@@ -483,12 +491,14 @@ void tscTableMetaCallBack(void *param, TAOS_RES *res, int code) {
           STableMetaInfo* pTableMetaInfo = tscGetTableMetaInfoFromCmd(pCmd, pCmd->clauseIndex, 0);
           code = tscGetTableMeta(pSql, pTableMetaInfo);
           if (code == TSDB_CODE_TSC_ACTION_IN_PROGRESS) {
+            taosReleaseRef(tscObjRef, pSql->self);
             return;
           } else {
             assert(code == TSDB_CODE_SUCCESS);      
           }
 
           (*pSql->fp)(pSql->param, pSql, code);
+          taosReleaseRef(tscObjRef, pSql->self);
           return;
         }
 
@@ -501,6 +511,7 @@ void tscTableMetaCallBack(void *param, TAOS_RES *res, int code) {
 
     code = tscGetTableMeta(pSql, pTableMetaInfo);
     if (code == TSDB_CODE_TSC_ACTION_IN_PROGRESS) {
+      taosReleaseRef(tscObjRef, pSql->self);
       return;
     } else if (code != TSDB_CODE_SUCCESS) {
       goto _error;
@@ -509,6 +520,7 @@ void tscTableMetaCallBack(void *param, TAOS_RES *res, int code) {
     if (UTIL_TABLE_IS_SUPER_TABLE(pTableMetaInfo)) {
       code = tscGetSTableVgroupInfo(pSql, pCmd->clauseIndex);
       if (code == TSDB_CODE_TSC_ACTION_IN_PROGRESS) {
+        taosReleaseRef(tscObjRef, pSql->self);
         return;
       } else if (code != TSDB_CODE_SUCCESS) {
         goto _error;
@@ -521,10 +533,16 @@ void tscTableMetaCallBack(void *param, TAOS_RES *res, int code) {
     }
 
     (*pSql->fp)(pSql->param, pSql, code);
+    
+    taosReleaseRef(tscObjRef, pSql->self);
+
     return;
   }
 
   tscDoQuery(pSql);
+
+  taosReleaseRef(tscObjRef, pSql->self);
+  
   return;
 
   _error:
@@ -532,4 +550,6 @@ void tscTableMetaCallBack(void *param, TAOS_RES *res, int code) {
     pSql->res.code = code;
     tscAsyncResultOnError(pSql);
   }
+
+  taosReleaseRef(tscObjRef, pSql->self);
 }
diff --git a/src/client/src/tscParseInsert.c b/src/client/src/tscParseInsert.c
index dbb807ad06c6af061c5d966144a71ee552285fd4..7151c33393577e877dd011b27df44dfc69be089d 100644
--- a/src/client/src/tscParseInsert.c
+++ b/src/client/src/tscParseInsert.c
@@ -762,6 +762,8 @@ static int32_t tscCheckIfCreateTable(char **sqlstr, SSqlObj *pSql) {
 
   char *sql = *sqlstr;
 
+  pSql->cmd.autoCreated = false;
+  
   // get the token of specified table
   index = 0;
   tableToken = tStrGetToken(sql, &index, false, 0, NULL);
@@ -945,11 +947,15 @@ static int32_t tscCheckIfCreateTable(char **sqlstr, SSqlObj *pSql) {
     SKVRow row = tdGetKVRowFromBuilder(&kvRowBuilder);
     tdDestroyKVRowBuilder(&kvRowBuilder);
     if (row == NULL) {
-      return TSDB_CODE_TSC_OUT_OF_MEMORY;
+      return tscInvalidSQLErrMsg(pCmd->payload, "tag value expected", NULL);
     }
     tdSortKVRowByColIdx(row);
 
     pCmd->tagData.dataLen = kvRowLen(row);
+    if (pCmd->tagData.dataLen <= 0){
+      return tscInvalidSQLErrMsg(pCmd->payload, "tag value expected", NULL);
+    }
+    
     char* pTag = realloc(pCmd->tagData.data, pCmd->tagData.dataLen);
     if (pTag == NULL) {
       return TSDB_CODE_TSC_OUT_OF_MEMORY;
diff --git a/src/client/src/tscSQLParser.c b/src/client/src/tscSQLParser.c
index a08482f57068496f11ab28c81aee24ace67999df..fff3c0cc0267812941c330b7d067d5f2ec3e2c31 100644
--- a/src/client/src/tscSQLParser.c
+++ b/src/client/src/tscSQLParser.c
@@ -221,7 +221,7 @@ static int32_t handlePassword(SSqlCmd* pCmd, SStrToken* pPwd) {
     return invalidSqlErrMsg(tscGetErrorMsgPayload(pCmd), msg1);
   }
 
-  if (pPwd->n >= TSDB_PASSWORD_LEN) {
+  if (pPwd->n >= TSDB_KEY_LEN) {
     return invalidSqlErrMsg(tscGetErrorMsgPayload(pCmd), msg2);
   }
 
@@ -1242,7 +1242,7 @@ int32_t setObjFullName(char* fullName, const char* account, SStrToken* pDB, SStr
 
   /* db name is not specified, the tableName dose not include db name */
   if (pDB != NULL) {
-    if (pDB->n >= TSDB_ACCT_LEN + TSDB_DB_NAME_LEN || pDB->n == 0) {
+    if (pDB->n >= TSDB_ACCT_ID_LEN + TSDB_DB_NAME_LEN || pDB->n == 0) {
       return TSDB_CODE_TSC_INVALID_SQL;
     }
 
@@ -6022,9 +6022,9 @@ int32_t tscCheckCreateDbParams(SSqlCmd* pCmd, SCreateDbMsg* pCreate) {
   }
 
   if (pCreate->quorum != -1 &&
-      (pCreate->quorum < TSDB_MIN_DB_REPLICA_OPTION || pCreate->quorum > TSDB_MAX_DB_REPLICA_OPTION)) {
+      (pCreate->quorum < TSDB_MIN_DB_QUORUM_OPTION || pCreate->quorum > TSDB_MAX_DB_QUORUM_OPTION)) {
     snprintf(msg, tListLen(msg), "invalid db option quorum: %d valid range: [%d, %d]", pCreate->quorum,
-             TSDB_MIN_DB_REPLICA_OPTION, TSDB_MAX_DB_REPLICA_OPTION);
+             TSDB_MIN_DB_QUORUM_OPTION, TSDB_MAX_DB_QUORUM_OPTION);
     return invalidSqlErrMsg(tscGetErrorMsgPayload(pCmd), msg);
   }
 
diff --git a/src/client/src/tscServer.c b/src/client/src/tscServer.c
index cc2621958f0713967b3a8aa62328c0212a062a5a..15dd77faebdb4167a9d13f21b2606a0946199b8e 100644
--- a/src/client/src/tscServer.c
+++ b/src/client/src/tscServer.c
@@ -423,7 +423,7 @@ void tscProcessMsgFromServer(SRpcMsg *rpcMsg, SRpcEpSet *pEpSet) {
 
   if (shouldFree) { // in case of table-meta/vgrouplist query, automatically free it
     taosRemoveRef(tscObjRef, pSql->self);
-    tscDebug("%p sqlObj is automatically freed", pSql);
+    tscDebug("%p sqlObj is automatically freed", pSql); 
   }
 
   rpcFreeCont(rpcMsg->pCont);
@@ -1975,9 +1975,6 @@ int tscProcessMultiMeterMetaRsp(SSqlObj *pSql) {
     //
     //    rsp += tagLen;
     //    int32_t size = (int32_t)(rsp - ((char *)pMeta));  // Consistent with STableMeta in cache
-    //
-    //    pMeta->index = 0;
-    //    (void)taosCachePut(tscMetaCache, pMeta->tableId, (char *)pMeta, size, tsTableMetaKeepTimer);
     //  }
   }
   
@@ -1990,16 +1987,20 @@ int tscProcessMultiMeterMetaRsp(SSqlObj *pSql) {
 }
 
 int tscProcessSTableVgroupRsp(SSqlObj *pSql) {
+  // master sqlObj locates in param
+  SSqlObj* parent = (SSqlObj*)taosAcquireRef(tscObjRef, (int64_t)pSql->param);
+  if(parent == NULL) {
+    return pSql->res.code;
+  }
+
+  assert(parent->signature == parent && (int64_t)pSql->param == parent->self);
+  
   SSqlRes* pRes = &pSql->res;
   
   // NOTE: the order of several table must be preserved.
   SSTableVgroupRspMsg *pStableVgroup = (SSTableVgroupRspMsg *)pRes->pRsp;
   pStableVgroup->numOfTables = htonl(pStableVgroup->numOfTables);
   char *pMsg = pRes->pRsp + sizeof(SSTableVgroupRspMsg);
-
-  // master sqlObj locates in param
-  SSqlObj* parent = pSql->param;
-  assert(parent != NULL);
   
   SSqlCmd* pCmd = &parent->cmd;
   for(int32_t i = 0; i < pStableVgroup->numOfTables; ++i) {
@@ -2033,6 +2034,8 @@ int tscProcessSTableVgroupRsp(SSqlObj *pSql) {
 
     pMsg += size;
   }
+
+  taosReleaseRef(tscObjRef, parent->self);
   
   return pSql->res.code;
 }
@@ -2326,10 +2329,14 @@ static int32_t getTableMetaFromMnode(SSqlObj *pSql, STableMetaInfo *pTableMetaIn
 
   tscDebug("%p new pSqlObj:%p to get tableMeta, auto create:%d", pSql, pNew, pNew->cmd.autoCreated);
 
+  registerSqlObj(pNew);
+
   pNew->fp = tscTableMetaCallBack;
-  pNew->param = pSql;
+  pNew->param = (void *)pSql->self;
 
-  registerSqlObj(pNew);
+  tscDebug("%p metaRid from %" PRId64 " to %" PRId64 , pSql, pSql->metaRid, pNew->self);
+  
+  pSql->metaRid = pNew->self;
 
   int32_t code = tscProcessSql(pNew);
   if (code == TSDB_CODE_SUCCESS) {
@@ -2346,6 +2353,7 @@ int32_t tscGetTableMeta(SSqlObj *pSql, STableMetaInfo *pTableMetaInfo) {
   uint32_t size = tscGetTableMetaMaxSize();
   pTableMetaInfo->pTableMeta = calloc(1, size);
 
+  pTableMetaInfo->pTableMeta->tableType = -1;
   pTableMetaInfo->pTableMeta->tableInfo.numOfColumns  = -1;
   int32_t len = (int32_t) strlen(pTableMetaInfo->name);
 
@@ -2445,10 +2453,15 @@ int tscGetSTableVgroupInfo(SSqlObj *pSql, int32_t clauseIndex) {
   pNewQueryInfo->numOfTables = pQueryInfo->numOfTables;
   registerSqlObj(pNew);
 
+  tscDebug("%p svgroupRid from %" PRId64 " to %" PRId64 , pSql, pSql->svgroupRid, pNew->self);
+  
+  pSql->svgroupRid = pNew->self;
+  
+
   tscDebug("%p new sqlObj:%p to get vgroupInfo, numOfTables:%d", pSql, pNew, pNewQueryInfo->numOfTables);
 
   pNew->fp = tscTableMetaCallBack;
-  pNew->param = pSql;
+  pNew->param = (void *)pSql->self;
   code = tscProcessSql(pNew);
   if (code == TSDB_CODE_SUCCESS) {
     code = TSDB_CODE_TSC_ACTION_IN_PROGRESS;
diff --git a/src/client/src/tscSql.c b/src/client/src/tscSql.c
index da86b4cb1963c0cd4a535976b59f99161cff0ada..3f25d7a14d90a4d8aac6ca33b53d34f721b9847b 100644
--- a/src/client/src/tscSql.c
+++ b/src/client/src/tscSql.c
@@ -47,7 +47,7 @@ static bool validUserName(const char* user) {
 }
 
 static bool validPassword(const char* passwd) {
-  return validImpl(passwd, TSDB_PASSWORD_LEN - 1);
+  return validImpl(passwd, TSDB_KEY_LEN - 1);
 }
 
 static SSqlObj *taosConnectImpl(const char *ip, const char *user, const char *pass, const char *auth, const char *db,
@@ -238,11 +238,11 @@ TAOS *taos_connect_c(const char *ip, uint8_t ipLen, const char *user, uint8_t us
                      uint8_t passLen, const char *db, uint8_t dbLen, uint16_t port) {
   char ipBuf[TSDB_EP_LEN] = {0};
   char userBuf[TSDB_USER_LEN] = {0};
-  char passBuf[TSDB_PASSWORD_LEN] = {0};
+  char passBuf[TSDB_KEY_LEN] = {0};
   char dbBuf[TSDB_DB_NAME_LEN] = {0};
   strncpy(ipBuf, ip, MIN(TSDB_EP_LEN - 1, ipLen));
   strncpy(userBuf, user, MIN(TSDB_USER_LEN - 1, userLen));
-  strncpy(passBuf, pass, MIN(TSDB_PASSWORD_LEN - 1, passLen));
+  strncpy(passBuf, pass, MIN(TSDB_KEY_LEN - 1, passLen));
   strncpy(dbBuf, db, MIN(TSDB_DB_NAME_LEN - 1, dbLen));
   return taos_connect(ipBuf, userBuf, passBuf, dbBuf, port);
 }
@@ -694,6 +694,8 @@ static void tscKillSTableQuery(SSqlObj *pSql) {
   // set the master sqlObj flag to cancel query
   pSql->res.code = TSDB_CODE_TSC_QUERY_CANCELLED;
 
+  tscLockByThread(&pSql->squeryLock);
+  
   for (int i = 0; i < pSql->subState.numOfSub; ++i) {
     // NOTE: pSub may have been released already here
     SSqlObj *pSub = pSql->pSubs[i];
@@ -713,6 +715,12 @@ static void tscKillSTableQuery(SSqlObj *pSql) {
     taosReleaseRef(tscObjRef, pSubObj->self);
   }
 
+  if (pSql->subState.numOfSub <= 0) {
+    tscAsyncResultOnError(pSql);
+  }
+
+  tscUnlockByThread(&pSql->squeryLock);
+
   tscDebug("%p super table query cancelled", pSql);
 }
 
@@ -978,7 +986,7 @@ static int tscParseTblNameList(SSqlObj *pSql, const char *tblNameList, int32_t t
       return code;
     }
 
-    if (++pCmd->count > TSDB_MULTI_METERMETA_MAX_NUM) {
+    if (++pCmd->count > TSDB_MULTI_TABLEMETA_MAX_NUM) {
       code = TSDB_CODE_TSC_INVALID_TABLE_ID_LENGTH;
       sprintf(pCmd->payload, "tables over the max number");
       return code;
diff --git a/src/client/src/tscStream.c b/src/client/src/tscStream.c
index 1c85938c641702973ac2a60bc5102b6affb9e9a3..a39fbc94202d3c1940b8631c9f95a38381857946 100644
--- a/src/client/src/tscStream.c
+++ b/src/client/src/tscStream.c
@@ -551,7 +551,6 @@ static void tscCreateStream(void *param, TAOS_RES *res, int code) {
   int64_t starttime = tscGetLaunchTimestamp(pStream);
   pCmd->command = TSDB_SQL_SELECT;
 
-  registerSqlObj(pSql);
   tscAddIntoStreamList(pStream);
 
   taosTmrReset(tscProcessStreamTimer, (int32_t)starttime, pStream, tscTmr, &pStream->pTimer);
@@ -610,12 +609,15 @@ TAOS_STREAM *taos_open_stream(TAOS *taos, const char *sqlstr, void (*fp)(void *p
 
   pSql->fp = tscCreateStream;
   pSql->fetchFp = tscCreateStream;
+
+  registerSqlObj(pSql);
+  
   int32_t code = tsParseSql(pSql, true);
   if (code == TSDB_CODE_SUCCESS) {
     tscCreateStream(pStream, pSql, code);
   } else if (code != TSDB_CODE_TSC_ACTION_IN_PROGRESS) {
     tscError("%p open stream failed, sql:%s, code:%s", pSql, sqlstr, tstrerror(pRes->code));
-    tscFreeSqlObj(pSql);
+    taosReleaseRef(tscObjRef, pSql->self);
     free(pStream);
     return NULL;
   }
diff --git a/src/client/src/tscSubquery.c b/src/client/src/tscSubquery.c
index d4f962063011910aa242c82146a5a3094da89c05..a00ea68bd0c176501a01e309890f06c6c24fd79a 100644
--- a/src/client/src/tscSubquery.c
+++ b/src/client/src/tscSubquery.c
@@ -533,7 +533,7 @@ static void quitAllSubquery(SSqlObj* pSqlObj, SJoinSupporter* pSupporter) {
     freeJoinSubqueryObj(pSqlObj);
   }
 
-  tscDestroyJoinSupporter(pSupporter);
+  //tscDestroyJoinSupporter(pSupporter);
 }
 
 // update the query time range according to the join results on timestamp
@@ -1362,14 +1362,23 @@ void tscJoinQueryCallback(void* param, TAOS_RES* tres, int code) {
 
   SJoinSupporter* pSupporter = (SJoinSupporter*)param;
   SSqlObj* pParentSql = pSupporter->pObj;
-
+  
   // There is only one subquery and table for each subquery.
   SQueryInfo* pQueryInfo = tscGetQueryInfoDetail(&pSql->cmd, 0);
+  STableMetaInfo* pTableMetaInfo = tscGetMetaInfo(pQueryInfo, 0);
+
   assert(pQueryInfo->numOfTables == 1 && pSql->cmd.numOfClause == 1);
 
   // retrieve actual query results from vnode during the second stage join subquery
   if (pParentSql->res.code != TSDB_CODE_SUCCESS) {
     tscError("%p abort query due to other subquery failure. code:%d, global code:%d", pSql, code, pParentSql->res.code);
+
+    if (!(pTableMetaInfo->vgroupIndex > 0 && tscNonOrderedProjectionQueryOnSTable(pQueryInfo, 0))) {
+      if (atomic_sub_fetch_32(&pParentSql->subState.numOfRemain, 1) > 0) {
+        return;
+      }
+    }
+    
     quitAllSubquery(pParentSql, pSupporter);
     tscAsyncResultOnError(pParentSql);
 
@@ -1383,6 +1392,12 @@ void tscJoinQueryCallback(void* param, TAOS_RES* tres, int code) {
     tscError("%p abort query, code:%s, global code:%s", pSql, tstrerror(code), tstrerror(pParentSql->res.code));
     pParentSql->res.code = code;
 
+    if (!(pTableMetaInfo->vgroupIndex > 0 && tscNonOrderedProjectionQueryOnSTable(pQueryInfo, 0))) {
+      if (atomic_sub_fetch_32(&pParentSql->subState.numOfRemain, 1) > 0) {
+        return;
+      }
+    }
+
     quitAllSubquery(pParentSql, pSupporter);
     tscAsyncResultOnError(pParentSql);
 
@@ -1405,9 +1420,6 @@ void tscJoinQueryCallback(void* param, TAOS_RES* tres, int code) {
     return;
   }
 
-
-  STableMetaInfo* pTableMetaInfo = tscGetMetaInfo(pQueryInfo, 0);
-
   // In case of consequence query from other vnode, do not wait for other query response here.
   if (!(pTableMetaInfo->vgroupIndex > 0 && tscNonOrderedProjectionQueryOnSTable(pQueryInfo, 0))) {
     if (atomic_sub_fetch_32(&pParentSql->subState.numOfRemain, 1) > 0) {
@@ -1658,6 +1670,25 @@ static void doCleanupSubqueries(SSqlObj *pSql, int32_t numOfSubs) {
   }
 }
 
+void tscLockByThread(int64_t *lockedBy) {
+  int64_t tid = taosGetSelfPthreadId();
+  int     i = 0;
+  while (atomic_val_compare_exchange_64(lockedBy, 0, tid) != 0) {
+    if (++i % 100 == 0) {
+      sched_yield();
+    }
+  }
+}
+
+void tscUnlockByThread(int64_t *lockedBy) {
+  int64_t tid = taosGetSelfPthreadId();
+  if (atomic_val_compare_exchange_64(lockedBy, tid, 0) != tid) {
+    assert(false);
+  }
+}
+
+
+
 int32_t tscHandleMasterSTableQuery(SSqlObj *pSql) {
   SSqlRes *pRes = &pSql->res;
   SSqlCmd *pCmd = &pSql->cmd;
diff --git a/src/client/src/tscUtil.c b/src/client/src/tscUtil.c
index b44ebb3c98c7bd63a3814aede2b1bf3c2ccb4d95..9a8aa917e70f978c2d5c4f0038223479eb10bbd3 100644
--- a/src/client/src/tscUtil.c
+++ b/src/client/src/tscUtil.c
@@ -468,6 +468,18 @@ void tscFreeRegisteredSqlObj(void *pSql) {
 
 }
 
+void tscFreeMetaSqlObj(int64_t *rid){
+  if (RID_VALID(*rid)) {
+    SSqlObj* pSql = (SSqlObj*)taosAcquireRef(tscObjRef, *rid);
+    if (pSql) {
+      taosRemoveRef(tscObjRef, *rid);
+      taosReleaseRef(tscObjRef, *rid);
+    }
+
+    *rid = 0;
+  }
+}
+
 void tscFreeSqlObj(SSqlObj* pSql) {
   if (pSql == NULL || pSql->signature != pSql) {
     return;
@@ -477,6 +489,9 @@ void tscFreeSqlObj(SSqlObj* pSql) {
 
   pSql->res.code = TSDB_CODE_TSC_QUERY_CANCELLED;
 
+  tscFreeMetaSqlObj(&pSql->metaRid);
+  tscFreeMetaSqlObj(&pSql->svgroupRid);
+
   tscFreeSubobj(pSql);
 
   SSqlCmd* pCmd = &pSql->cmd;
@@ -505,6 +520,7 @@ void tscFreeSqlObj(SSqlObj* pSql) {
   pCmd->allocSize = 0;
   
   tsem_destroy(&pSql->rspSem);
+  memset(pSql, 0, sizeof(*pSql));
   free(pSql);
 }
 
@@ -2193,7 +2209,9 @@ void tscDoQuery(SSqlObj* pSql) {
           tscProcessSql(pSql);
         } else { // secondary stage join query.
           if (tscIsTwoStageSTableQuery(pQueryInfo, 0)) {  // super table query
+            tscLockByThread(&pSql->squeryLock);
             tscHandleMasterSTableQuery(pSql);
+            tscUnlockByThread(&pSql->squeryLock);
           } else {
             tscProcessSql(pSql);
           }
@@ -2202,7 +2220,9 @@ void tscDoQuery(SSqlObj* pSql) {
 
       return;
     } else if (tscIsTwoStageSTableQuery(pQueryInfo, 0)) {  // super table query
+      tscLockByThread(&pSql->squeryLock);
       tscHandleMasterSTableQuery(pSql);
+      tscUnlockByThread(&pSql->squeryLock);
       return;
     }
     
diff --git a/src/client/tests/CMakeLists.txt b/src/client/tests/CMakeLists.txt
index f07af85e255eaa5e285d9a4ce0853251e0fdaa21..4ea0b80bf7c1c870532f1bc3cac313c43f1a57f0 100644
--- a/src/client/tests/CMakeLists.txt
+++ b/src/client/tests/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
+CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
 PROJECT(TDengine)
 
 FIND_PATH(HEADER_GTEST_INCLUDE_DIR gtest.h /usr/include/gtest /usr/local/include/gtest)
diff --git a/src/client/tests/timeParseTest.cpp b/src/client/tests/timeParseTest.cpp
index bee01b5cecdf5f42a6cd0105fa6b808a23957012..d7325430cd1d859ab9dd3e86f8dd55ab0dd1355d 100644
--- a/src/client/tests/timeParseTest.cpp
+++ b/src/client/tests/timeParseTest.cpp
@@ -162,6 +162,10 @@ TEST(testCase, parse_time) {
   
   taosParseTime(t13, &time, strlen(t13), TSDB_TIME_PRECISION_MILLI, 0);
   EXPECT_EQ(time, -28800 * MILLISECOND_PER_SECOND);
+
+  char* t = "2021-01-08T02:11:40.000+00:00";
+  taosParseTime(t, &time, strlen(t), TSDB_TIME_PRECISION_MILLI, 0);
+  printf("%ld\n", time);
 }
 
 
diff --git a/src/common/CMakeLists.txt b/src/common/CMakeLists.txt
index 0da7bda994db83882e36e9d52a7983635ad85330..df0ac7986599da3e53d97f64c0c5113a357f9177 100644
--- a/src/common/CMakeLists.txt
+++ b/src/common/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
+CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
 PROJECT(TDengine)
 
 INCLUDE_DIRECTORIES(inc)
diff --git a/src/common/inc/tglobal.h b/src/common/inc/tglobal.h
index f6a08f819867d3a10370fdfcdabbd3aef5bb138f..c54d519637cad547fac2d1960e809ec2c615274d 100644
--- a/src/common/inc/tglobal.h
+++ b/src/common/inc/tglobal.h
@@ -63,7 +63,6 @@ extern int32_t  tsRetrieveBlockingModel;// retrieve threads will be blocked
 extern int8_t   tsKeepOriginalColumnName;
 
 // client
-extern int32_t tsTableMetaKeepTimer;
 extern int32_t tsMaxSQLStringLen;
 extern int8_t  tsTscEnableRecordSql;
 extern int32_t tsMaxNumOfOrderedResults;
diff --git a/src/common/src/tglobal.c b/src/common/src/tglobal.c
index 551fb96195cf59fa499405641423dc409d073d66..125e80564295401cb17337f09e66cf4955ecd944 100644
--- a/src/common/src/tglobal.c
+++ b/src/common/src/tglobal.c
@@ -72,7 +72,6 @@ char    tsTempDir[TSDB_FILENAME_LEN] = "/tmp/";
 int32_t tsCompressMsgSize = -1;
 
 // client
-int32_t tsTableMetaKeepTimer = 7200;  // second
 int32_t tsMaxSQLStringLen = TSDB_MAX_SQL_LEN;
 int8_t  tsTscEnableRecordSql = 0;
 
@@ -596,16 +595,6 @@ static void doInitGlobalConfig(void) {
   cfg.unitType = TAOS_CFG_UTYPE_SECOND;
   taosInitConfigOption(cfg);
 
-  cfg.option = "tableMetaKeepTimer";
-  cfg.ptr = &tsTableMetaKeepTimer;
-  cfg.valType = TAOS_CFG_VTYPE_INT32;
-  cfg.cfgType = TSDB_CFG_CTYPE_B_CONFIG | TSDB_CFG_CTYPE_B_CLIENT;
-  cfg.minValue = 1;
-  cfg.maxValue = 8640000;
-  cfg.ptrLength = 0;
-  cfg.unitType = TAOS_CFG_UTYPE_SECOND;
-  taosInitConfigOption(cfg);
-
   cfg.option = "minSlidingTime";
   cfg.ptr = &tsMinSlidingTime;
   cfg.valType = TAOS_CFG_VTYPE_INT32;
@@ -811,8 +800,8 @@ static void doInitGlobalConfig(void) {
   cfg.ptr = &tsQuorum;
   cfg.valType = TAOS_CFG_VTYPE_INT32;
   cfg.cfgType = TSDB_CFG_CTYPE_B_CONFIG | TSDB_CFG_CTYPE_B_SHOW;
-  cfg.minValue = TSDB_MIN_DB_REPLICA_OPTION;
-  cfg.maxValue = TSDB_MAX_DB_REPLICA_OPTION;
+  cfg.minValue = TSDB_MIN_DB_QUORUM_OPTION;
+  cfg.maxValue = TSDB_MAX_DB_QUORUM_OPTION;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
   taosInitConfigOption(cfg);
diff --git a/src/connector/jdbc/CMakeLists.txt b/src/connector/jdbc/CMakeLists.txt
index e289f1ae1b4823ad5c6fd580551a9ee3f9800d9e..22d3d31547d0653a0ce0afe7b4128219fef35098 100644
--- a/src/connector/jdbc/CMakeLists.txt
+++ b/src/connector/jdbc/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
+CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
 
 PROJECT(TDengine)
 
diff --git a/src/connector/odbc/CMakeLists.txt b/src/connector/odbc/CMakeLists.txt
index 0d8c07041aa741793b7a1b8db20c3a3b470cf193..2e1e39ef123c901b36050a9e239fe58d26869e8e 100644
--- a/src/connector/odbc/CMakeLists.txt
+++ b/src/connector/odbc/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
+CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
 PROJECT(TDengine)
 
 IF (TD_LINUX_64)
diff --git a/src/connector/odbc/src/CMakeLists.txt b/src/connector/odbc/src/CMakeLists.txt
index 2699e1bc90e162c80d27d690e1f7163747616526..67357cb4698b2885b563fd54133f36aace38c54b 100644
--- a/src/connector/odbc/src/CMakeLists.txt
+++ b/src/connector/odbc/src/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
+CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
 PROJECT(TDengine)
 
 IF (TD_LINUX_64)
diff --git a/src/cq/CMakeLists.txt b/src/cq/CMakeLists.txt
index e6313973484467e4b67be88ffc21225923739b71..9da831c9c137a0551306d343dd112189816ead5b 100644
--- a/src/cq/CMakeLists.txt
+++ b/src/cq/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
+CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
 PROJECT(TDengine)
 
 INCLUDE_DIRECTORIES(inc)
diff --git a/src/cq/src/cqMain.c b/src/cq/src/cqMain.c
index a0df8247b7136412c3f497b3443bdd77c5b8bf4d..0fe5ea78d46e6d2796c1d71531c87ec44cb8ee0d 100644
--- a/src/cq/src/cqMain.c
+++ b/src/cq/src/cqMain.c
@@ -43,7 +43,7 @@ typedef struct {
   int32_t  master;
   int32_t  num;      // number of continuous streams
   char     user[TSDB_USER_LEN];
-  char     pass[TSDB_PASSWORD_LEN];
+  char     pass[TSDB_KEY_LEN];
   char     db[TSDB_DB_NAME_LEN];
   FCqWrite cqWrite;
   struct SCqObj *pHead;
diff --git a/src/cq/test/CMakeLists.txt b/src/cq/test/CMakeLists.txt
index 59c0ac79cfffd35a40beb58a2a172a9bf27dca15..87a8705fcd53be733d7ecec840ce38355c00d737 100644
--- a/src/cq/test/CMakeLists.txt
+++ b/src/cq/test/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
+CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
 PROJECT(TDengine)
 
 LIST(APPEND CQTEST_SRC ./cqtest.c)
diff --git a/src/dnode/CMakeLists.txt b/src/dnode/CMakeLists.txt
index ebb25bf85879e5ab1a53bd8ae4ae9ad3579bd6eb..699ca00a250866122023d8a4cd789f91bd038609 100644
--- a/src/dnode/CMakeLists.txt
+++ b/src/dnode/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
+CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
 PROJECT(TDengine)
 
 INCLUDE_DIRECTORIES(${TD_COMMUNITY_DIR}/src/query/inc)
diff --git a/src/dnode/src/dnodeVWrite.c b/src/dnode/src/dnodeVWrite.c
index 775ced09900612da76fff5a60d42839b83fcb133..ab5a4ccaad5fa3e5969776c75db26a30d3e32e8e 100644
--- a/src/dnode/src/dnodeVWrite.c
+++ b/src/dnode/src/dnodeVWrite.c
@@ -202,13 +202,14 @@ static void *dnodeProcessVWriteQueue(void *wparam) {
     for (int32_t i = 0; i < numOfMsgs; ++i) {
       taosGetQitem(pWorker->qall, &qtype, (void **)&pWrite);
       dTrace("msg:%p, app:%p type:%s will be processed in vwrite queue, qtype:%s hver:%" PRIu64, pWrite,
-             pWrite->rpcMsg.ahandle, taosMsg[pWrite->pHead->msgType], qtypeStr[qtype], pWrite->pHead->version);
+             pWrite->rpcMsg.ahandle, taosMsg[pWrite->pHead.msgType], qtypeStr[qtype], pWrite->pHead.version);
 
-      pWrite->code = vnodeProcessWrite(pVnode, pWrite->pHead, qtype, &pWrite->rspRet);
+      pWrite->code = vnodeProcessWrite(pVnode, &pWrite->pHead, qtype, pWrite);
       if (pWrite->code <= 0) pWrite->processedCount = 1;
-      if (pWrite->code == 0 && pWrite->pHead->msgType != TSDB_MSG_TYPE_SUBMIT) forceFsync = true;
+      if (pWrite->code > 0) pWrite->code = 0;
+      if (pWrite->code == 0 && pWrite->pHead.msgType != TSDB_MSG_TYPE_SUBMIT) forceFsync = true;
 
-      dTrace("msg:%p is processed in vwrite queue, result:%s", pWrite, tstrerror(pWrite->code));
+      dTrace("msg:%p is processed in vwrite queue, code:0x%x", pWrite, pWrite->code);
     }
 
     walFsync(vnodeGetWal(pVnode), forceFsync);
@@ -221,7 +222,7 @@ static void *dnodeProcessVWriteQueue(void *wparam) {
         dnodeSendRpcVWriteRsp(pVnode, pWrite, pWrite->code);
       } else {
         if (qtype == TAOS_QTYPE_FWD) {
-          vnodeConfirmForward(pVnode, pWrite->pHead->version, 0);
+          vnodeConfirmForward(pVnode, pWrite->pHead.version, 0);
         }
         if (pWrite->rspRet.rsp) {
           rpcFreeCont(pWrite->rspRet.rsp);
diff --git a/src/inc/taosdef.h b/src/inc/taosdef.h
index 9a52cb3beea5e37b6e62081fe8088e770eceede8..493b8091e93b59f823b11fc021365c9aa90e620c 100644
--- a/src/inc/taosdef.h
+++ b/src/inc/taosdef.h
@@ -256,10 +256,8 @@ int32_t tStrToInteger(const char* z, int16_t type, int32_t n, int64_t* value, bo
 #define TSDB_USER_LEN             TSDB_UNI_LEN
 
 // ACCOUNT is a 32 bit positive integer
-// this is the length of its string representation
-// including the terminator zero
-#define TSDB_ACCT_LEN             11
-#define TSDB_PASSWORD_LEN         TSDB_UNI_LEN
+// this is the length of its string representation, including the terminator zero
+#define TSDB_ACCT_ID_LEN          11
 
 #define TSDB_MAX_COLUMNS          1024
 #define TSDB_MIN_COLUMNS          2       //PRIMARY COLUMN(timestamp) + other columns
@@ -267,7 +265,7 @@ int32_t tStrToInteger(const char* z, int16_t type, int32_t n, int64_t* value, bo
 #define TSDB_NODE_NAME_LEN        64
 #define TSDB_TABLE_NAME_LEN       193     // it is a null-terminated string
 #define TSDB_DB_NAME_LEN          33
-#define TSDB_TABLE_FNAME_LEN      (TSDB_ACCT_LEN + TSDB_DB_NAME_LEN + TSDB_TABLE_NAME_LEN)
+#define TSDB_TABLE_FNAME_LEN      (TSDB_ACCT_ID_LEN + TSDB_DB_NAME_LEN + TSDB_TABLE_NAME_LEN)
 #define TSDB_COL_NAME_LEN         65
 #define TSDB_MAX_SAVED_SQL_LEN    TSDB_MAX_COLUMNS * 64
 #define TSDB_MAX_SQL_LEN          TSDB_PAYLOAD_SIZE
@@ -293,11 +291,6 @@ int32_t tStrToInteger(const char* z, int16_t type, int32_t n, int64_t* value, bo
 #define TSDB_EP_LEN               (TSDB_FQDN_LEN+6)
 #define TSDB_IPv4ADDR_LEN      	  16
 #define TSDB_FILENAME_LEN         128
-#define TSDB_METER_VNODE_BITS     20
-#define TSDB_METER_SID_MASK       0xFFFFF
-#define TSDB_SHELL_VNODE_BITS     24
-#define TSDB_SHELL_SID_MASK       0xFF
-#define TSDB_HTTP_TOKEN_LEN       20
 #define TSDB_SHOW_SQL_LEN         512
 #define TSDB_SLOW_QUERY_SQL_LEN   512
 
@@ -311,9 +304,6 @@ int32_t tStrToInteger(const char* z, int16_t type, int32_t n, int64_t* value, bo
 #define TSDB_MQTT_TOPIC_LEN       64
 #define TSDB_MQTT_CLIENT_ID_LEN   32
 
-#define TSDB_METER_STATE_OFFLINE  0
-#define TSDB_METER_STATE_ONLLINE  1
-
 #define TSDB_DEFAULT_PKT_SIZE     65480  //same as RPC_MAX_UDP_SIZE
 
 #define TSDB_PAYLOAD_SIZE         TSDB_DEFAULT_PKT_SIZE
@@ -333,7 +323,7 @@ int32_t tStrToInteger(const char* z, int16_t type, int32_t n, int64_t* value, bo
 
 #define TSDB_TBNAME_COLUMN_INDEX        (-1)
 #define TSDB_UD_COLUMN_INDEX            (-100)
-#define TSDB_MULTI_METERMETA_MAX_NUM    100000  // maximum batch size allowed to load metermeta
+#define TSDB_MULTI_TABLEMETA_MAX_NUM    100000  // maximum batch size allowed to load table meta
 
 #define TSDB_MIN_CACHE_BLOCK_SIZE       1
 #define TSDB_MAX_CACHE_BLOCK_SIZE       128     // 128MB for each vnode
@@ -395,6 +385,9 @@ int32_t tStrToInteger(const char* z, int16_t type, int32_t n, int64_t* value, bo
 #define TSDB_MIN_DB_REPLICA_OPTION      1
 #define TSDB_MAX_DB_REPLICA_OPTION      3
 #define TSDB_DEFAULT_DB_REPLICA_OPTION  1
+
+#define TSDB_MIN_DB_QUORUM_OPTION       1
+#define TSDB_MAX_DB_QUORUM_OPTION       2
 #define TSDB_DEFAULT_DB_QUORUM_OPTION   1
 
 #define TSDB_MAX_JOIN_TABLE_NUM         5
diff --git a/src/inc/taosmsg.h b/src/inc/taosmsg.h
index 2dee6dc3bb20c7397ef435d4b7f37e5861f8891e..905867fbc7355b34f87e62ab71f8172e4b7bf93e 100644
--- a/src/inc/taosmsg.h
+++ b/src/inc/taosmsg.h
@@ -268,7 +268,7 @@ typedef struct {
 typedef struct {
   int32_t len;  // one create table message
   char    tableId[TSDB_TABLE_FNAME_LEN];
-  char    db[TSDB_ACCT_LEN + TSDB_DB_NAME_LEN];
+  char    db[TSDB_ACCT_ID_LEN + TSDB_DB_NAME_LEN];
   int8_t  igExists;
   int8_t  getMeta;
   int16_t numOfTags;
@@ -290,7 +290,7 @@ typedef struct {
 
 typedef struct {
   char    tableId[TSDB_TABLE_FNAME_LEN];
-  char    db[TSDB_ACCT_LEN + TSDB_DB_NAME_LEN];
+  char    db[TSDB_ACCT_ID_LEN + TSDB_DB_NAME_LEN];
   int16_t type; /* operation type   */
   int16_t numOfCols; /* number of schema */
   int32_t tagValLen;
@@ -322,7 +322,7 @@ typedef struct {
 } SConnectMsg;
 
 typedef struct {
-  char      acctId[TSDB_ACCT_LEN];
+  char      acctId[TSDB_ACCT_ID_LEN];
   char      serverVersion[TSDB_VERSION_LEN];
   char      clusterId[TSDB_CLUSTER_ID_LEN];
   int8_t    writeAuth;
@@ -534,7 +534,7 @@ typedef struct {
 } SVnodeLoad;
 
 typedef struct {
-  char     db[TSDB_ACCT_LEN + TSDB_DB_NAME_LEN];
+  char     db[TSDB_ACCT_ID_LEN + TSDB_DB_NAME_LEN];
   int32_t  cacheBlockSize; //MB
   int32_t  totalBlocks;
   int32_t  maxTables;
@@ -682,7 +682,7 @@ typedef struct {
 } SVnodeDesc;
 
 typedef struct {
-  char       db[TSDB_ACCT_LEN + TSDB_DB_NAME_LEN];
+  char       db[TSDB_ACCT_ID_LEN + TSDB_DB_NAME_LEN];
   SVnodeCfg  cfg;
   SVnodeDesc nodes[TSDB_MAX_REPLICA];
 } SCreateVnodeMsg, SAlterVnodeMsg;
@@ -761,7 +761,7 @@ typedef struct {
  */
 typedef struct {
   int8_t   type;
-  char     db[TSDB_ACCT_LEN + TSDB_DB_NAME_LEN];
+  char     db[TSDB_ACCT_ID_LEN + TSDB_DB_NAME_LEN];
   uint16_t payloadLen;
   char     payload[];
 } SShowMsg;
diff --git a/src/inc/tcq.h b/src/inc/tcq.h
index ad123d4080e23d2c7933dcea2981fd2376b99afe..1941649d0a02e7c75f4781cad5dedfa185127752 100644
--- a/src/inc/tcq.h
+++ b/src/inc/tcq.h
@@ -26,7 +26,7 @@ typedef int32_t (*FCqWrite)(int32_t vgId, void *pHead, int32_t qtype, void *pMsg
 typedef struct {
   int32_t  vgId;
   char     user[TSDB_USER_LEN];
-  char     pass[TSDB_PASSWORD_LEN];
+  char     pass[TSDB_KEY_LEN];
   char     db[TSDB_DB_NAME_LEN];
   FCqWrite cqWrite;
 } SCqCfg;
diff --git a/src/inc/vnode.h b/src/inc/vnode.h
index cbe64484b11462fcf3f107625cb0e00b0ac682f4..7c9ebd8a0b9d96090134bd23c2061c857dfcd5f1 100644
--- a/src/inc/vnode.h
+++ b/src/inc/vnode.h
@@ -49,7 +49,7 @@ typedef struct {
   SRpcMsg  rpcMsg;
   SRspRet  rspRet;
   char     reserveForSync[24];
-  SWalHead pHead[];
+  SWalHead pHead;
 } SVWriteMsg;
 
 // vnodeStatus
diff --git a/src/kit/CMakeLists.txt b/src/kit/CMakeLists.txt
index bf5278430054598b31e591ff728412556dabc6f0..bf77d856f9f772aeffb42f7f85d51a5841943076 100644
--- a/src/kit/CMakeLists.txt
+++ b/src/kit/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
+CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
 PROJECT(TDengine)
 
 ADD_SUBDIRECTORY(shell)
diff --git a/src/kit/shell/CMakeLists.txt b/src/kit/shell/CMakeLists.txt
index c86cac281c0283aac691555927d679b0ef4f4f64..45da99e5722968591ffccf16432a8cb84d3557ff 100644
--- a/src/kit/shell/CMakeLists.txt
+++ b/src/kit/shell/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
+CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
 PROJECT(TDengine)
 
 INCLUDE_DIRECTORIES(${TD_COMMUNITY_DIR}/src/client/inc)
diff --git a/src/kit/taosdemo/CMakeLists.txt b/src/kit/taosdemo/CMakeLists.txt
index ab02bdb64d1338ae2cf92a9784eddf9453a4e849..91c743939c26ce9bb20e18dd1f701f6eb75fd573 100644
--- a/src/kit/taosdemo/CMakeLists.txt
+++ b/src/kit/taosdemo/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
+CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
 PROJECT(TDengine)
 
 INCLUDE_DIRECTORIES(${TD_COMMUNITY_DIR}/src/client/inc)
diff --git a/src/kit/taosdemox/CMakeLists.txt b/src/kit/taosdemox/CMakeLists.txt
index 3f5e725aeaf9fa957e8aa9cdd54978df7fbd94ed..7db6c04b281aa6dea3e9b51fc47a8796fd64371b 100644
--- a/src/kit/taosdemox/CMakeLists.txt
+++ b/src/kit/taosdemox/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
+CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
 PROJECT(TDengine)
 
 INCLUDE_DIRECTORIES(${TD_COMMUNITY_DIR}/src/client/inc)
diff --git a/src/kit/taosdump/CMakeLists.txt b/src/kit/taosdump/CMakeLists.txt
index dcdbd486154b2673459e25754dc75457851a4df4..dc9ac6d4a789c4292480f522240690e13b47245b 100644
--- a/src/kit/taosdump/CMakeLists.txt
+++ b/src/kit/taosdump/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
+CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
 PROJECT(TDengine)
 
 INCLUDE_DIRECTORIES(${TD_COMMUNITY_DIR}/src/client/inc)
diff --git a/src/mnode/CMakeLists.txt b/src/mnode/CMakeLists.txt
index ff5c9335b654edbdb7bbf6c081b38b265923d645..41230986948c7ddbd746e2bd2c6e5fcece66c041 100644
--- a/src/mnode/CMakeLists.txt
+++ b/src/mnode/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
+CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
 PROJECT(TDengine)
 
 IF (TD_LINUX)
diff --git a/src/mnode/inc/mnodeDef.h b/src/mnode/inc/mnodeDef.h
index d29a738a10f6734ee62b45867582ed75c667f78f..5eeac97209634206d42e1c4aebec129e67ee38e5 100644
--- a/src/mnode/inc/mnodeDef.h
+++ b/src/mnode/inc/mnodeDef.h
@@ -138,7 +138,7 @@ typedef struct SVgObj {
   int64_t        createdTime;
   int32_t        lbDnodeId;
   int32_t        lbTime;
-  char           dbName[TSDB_ACCT_LEN + TSDB_DB_NAME_LEN];
+  char           dbName[TSDB_ACCT_ID_LEN + TSDB_DB_NAME_LEN];
   int8_t         inUse;
   int8_t         accessState;
   int8_t         status;
@@ -179,7 +179,7 @@ typedef struct {
 } SDbCfg;
 
 typedef struct SDbObj {
-  char    name[TSDB_ACCT_LEN + TSDB_DB_NAME_LEN];
+  char    name[TSDB_ACCT_ID_LEN + TSDB_DB_NAME_LEN];
   int8_t  reserved0[4];
   char    acct[TSDB_USER_LEN];
   int64_t createdTime;
diff --git a/src/mnode/src/mnodeDb.c b/src/mnode/src/mnodeDb.c
index 8a03b1cd0e1029ef650f13f21a4c3548557b0527..fbcad151bc5f8f7f9168e12db02059b0c86d0f2c 100644
--- a/src/mnode/src/mnodeDb.c
+++ b/src/mnode/src/mnodeDb.c
@@ -316,9 +316,14 @@ static int32_t mnodeCheckDbCfg(SDbCfg *pCfg) {
     return TSDB_CODE_MND_INVALID_DB_OPTION;
   }
 
-  if (pCfg->quorum < TSDB_MIN_DB_REPLICA_OPTION || pCfg->quorum > TSDB_MAX_DB_REPLICA_OPTION) {
-    mError("invalid db option quorum:%d valid range: [%d, %d]", pCfg->quorum, TSDB_MIN_DB_REPLICA_OPTION,
-           TSDB_MAX_DB_REPLICA_OPTION);
+  if (pCfg->quorum > pCfg->replications) {
+    mError("invalid db option quorum:%d larger than replica:%d", pCfg->quorum, pCfg->replications);
+    return TSDB_CODE_MND_INVALID_DB_OPTION;
+  }
+
+  if (pCfg->quorum < TSDB_MIN_DB_QUORUM_OPTION || pCfg->quorum > TSDB_MAX_DB_QUORUM_OPTION) {
+    mError("invalid db option quorum:%d valid range: [%d, %d]", pCfg->quorum, TSDB_MIN_DB_QUORUM_OPTION,
+           TSDB_MAX_DB_QUORUM_OPTION);
     return TSDB_CODE_MND_INVALID_DB_OPTION;
   }
 
diff --git a/src/mnode/src/mnodeVgroup.c b/src/mnode/src/mnodeVgroup.c
index 827be0687dbac338d660d07fefaf563d5c5d0341..881ef95fca0ac327d75ab00007b1bab3c8980578 100644
--- a/src/mnode/src/mnodeVgroup.c
+++ b/src/mnode/src/mnodeVgroup.c
@@ -565,7 +565,7 @@ int32_t mnodeCreateVgroup(SMnodeMsg *pMsg) {
   SDbObj *pDb = pMsg->pDb;
 
   SVgObj *pVgroup = (SVgObj *)calloc(1, sizeof(SVgObj));
-  tstrncpy(pVgroup->dbName, pDb->name, TSDB_ACCT_LEN + TSDB_DB_NAME_LEN);
+  tstrncpy(pVgroup->dbName, pDb->name, TSDB_ACCT_ID_LEN + TSDB_DB_NAME_LEN);
   pVgroup->numOfVnodes = pDb->cfg.replications;
   pVgroup->createdTime = taosGetTimestampMs();
   pVgroup->accessState = TSDB_VN_ALL_ACCCESS;
diff --git a/src/os/CMakeLists.txt b/src/os/CMakeLists.txt
index 4e44d29a025eee1eb8b850494b235dc48e9c050a..f41719f2404297070656910653b65a3fbffa7916 100644
--- a/src/os/CMakeLists.txt
+++ b/src/os/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
+CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
 PROJECT(TDengine)
 
 IF (TD_LINUX)
@@ -10,3 +10,5 @@ ELSEIF (TD_WINDOWS)
 ENDIF ()
 
 ADD_SUBDIRECTORY(src/detail)
+ADD_SUBDIRECTORY(tests)
+
diff --git a/src/os/src/alpine/CMakeLists.txt b/src/os/src/alpine/CMakeLists.txt
index b5e739c24ce7ec3ef3ffc537ca8769706f7b56de..daa0b3cf43d0de60fafc960e48e3ad8aeec1a9ad 100644
--- a/src/os/src/alpine/CMakeLists.txt
+++ b/src/os/src/alpine/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
+CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
 PROJECT(TDengine)
 
 AUX_SOURCE_DIRECTORY(. SRC)
diff --git a/src/os/src/darwin/CMakeLists.txt b/src/os/src/darwin/CMakeLists.txt
index c4cb28aa05e4716ca98c2687ce41d436b1300bb2..7f05ddd64b87f69e5fa03c874bb2bc401e5094cc 100644
--- a/src/os/src/darwin/CMakeLists.txt
+++ b/src/os/src/darwin/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
+CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
 PROJECT(TDengine)
 
 AUX_SOURCE_DIRECTORY(. SRC)
diff --git a/src/os/src/detail/CMakeLists.txt b/src/os/src/detail/CMakeLists.txt
index 0d5c130d6eddce07b967e3fe15762f01d6e1e97b..e4052a4fb32d4d8bda1ea05443cf95c276251e57 100644
--- a/src/os/src/detail/CMakeLists.txt
+++ b/src/os/src/detail/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
+CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
 PROJECT(TDengine)
 
 INCLUDE_DIRECTORIES(.)
diff --git a/src/os/src/detail/osTime.c b/src/os/src/detail/osTime.c
index b78627f46f2124912338f3b029b5a0fd341e729c..1710c469fb48506f21d914ac586fa8356f044619 100644
--- a/src/os/src/detail/osTime.c
+++ b/src/os/src/detail/osTime.c
@@ -486,7 +486,7 @@ int64_t taosTimeTruncate(int64_t t, const SInterval* pInterval, int32_t precisio
     start = (delta / pInterval->sliding + factor) * pInterval->sliding;
 
     if (pInterval->intervalUnit == 'd' || pInterval->intervalUnit == 'w') {
-      /*
+     /*
       * here we revised the start time of day according to the local time zone,
       * but in case of DST, the start time of one day need to be dynamically decided.
       */
@@ -501,9 +501,24 @@ int64_t taosTimeTruncate(int64_t t, const SInterval* pInterval, int32_t precisio
       start += (int64_t)(timezone * TSDB_TICK_PER_SECOND(precision));
     }
 
-    int64_t end = start + pInterval->interval - 1;
-    if (end < t) {
-      start += pInterval->sliding;
+    int64_t end = 0;
+
+    // not enough time range
+    if (INT64_MAX - start > pInterval->interval - 1) {
+      end = start + pInterval->interval - 1;
+
+      while(end < t && ((start + pInterval->sliding) <= INT64_MAX)) { // move forward to the correct time window
+        start += pInterval->sliding;
+
+        if (INT64_MAX - start > pInterval->interval - 1) {
+          end = start + pInterval->interval - 1;
+        } else {
+          end = INT64_MAX;
+          break;
+        }
+      }
+    } else {
+      end = INT64_MAX;
     }
   }
 
diff --git a/src/os/src/linux/CMakeLists.txt b/src/os/src/linux/CMakeLists.txt
index b1a7ebf54e58bbbdeea6d5cc219904916cc2ba03..8ab8f554672843eec34ed1880ba672e61e54aa7b 100644
--- a/src/os/src/linux/CMakeLists.txt
+++ b/src/os/src/linux/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
+CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
 PROJECT(TDengine)
 
 AUX_SOURCE_DIRECTORY(. SRC)
diff --git a/src/os/src/windows/CMakeLists.txt b/src/os/src/windows/CMakeLists.txt
index 9dcc9e7e6d93ff200b7571d98724f898712658eb..a430dd3b3f968cd845732ead4aa1b780aea10c22 100644
--- a/src/os/src/windows/CMakeLists.txt
+++ b/src/os/src/windows/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
+CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
 PROJECT(TDengine)
 
 AUX_SOURCE_DIRECTORY(. SRC)
diff --git a/src/os/tests/CMakeLists.txt b/src/os/tests/CMakeLists.txt
new file mode 100644
index 0000000000000000000000000000000000000000..1a18a72b40677f1e21b2431499b17c4c745fad7d
--- /dev/null
+++ b/src/os/tests/CMakeLists.txt
@@ -0,0 +1,15 @@
+CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
+PROJECT(TDengine)
+
+FIND_PATH(HEADER_GTEST_INCLUDE_DIR gtest.h /usr/include/gtest /usr/local/include/gtest)
+FIND_LIBRARY(LIB_GTEST_STATIC_DIR libgtest.a /usr/lib/ /usr/local/lib)
+
+IF (HEADER_GTEST_INCLUDE_DIR AND LIB_GTEST_STATIC_DIR)
+    MESSAGE(STATUS "gTest library found, build unit test")
+
+    INCLUDE_DIRECTORIES(${HEADER_GTEST_INCLUDE_DIR})
+    AUX_SOURCE_DIRECTORY(${CMAKE_CURRENT_SOURCE_DIR} SOURCE_LIST)
+
+    ADD_EXECUTABLE(osTest ${SOURCE_LIST})
+    TARGET_LINK_LIBRARIES(osTest taos osdetail tutil common gtest pthread)
+ENDIF()
\ No newline at end of file
diff --git a/src/os/tests/test.cpp b/src/os/tests/test.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..600e5d71a760653f8a932985f0d14a60081575b6
--- /dev/null
+++ b/src/os/tests/test.cpp
@@ -0,0 +1,34 @@
+#include "os.h"
+#include <gtest/gtest.h>
+#include <cassert>
+#include <iostream>
+
+#include "taos.h"
+#include "tstoken.h"
+#include "tutil.h"
+
+int main(int argc, char** argv) {
+  testing::InitGoogleTest(&argc, argv);
+  return RUN_ALL_TESTS();
+}
+
+// test function in os module
+TEST(testCase, parse_time) {
+  taos_options(TSDB_OPTION_TIMEZONE, "GMT-8");
+  deltaToUtcInitOnce();
+
+  // window: 1500000001000, 1500002000000
+  // pQuery->interval: interval: 86400000, sliding:3600000
+  int64_t key = 1500000001000;
+  SInterval interval = {0};
+  interval.interval = 86400000;
+  interval.intervalUnit = 'd';
+  interval.sliding = 3600000;
+  interval.slidingUnit = 'h';
+
+  int64_t s = taosTimeTruncate(key, &interval, TSDB_TIME_PRECISION_MILLI);
+  ASSERT_TRUE(s + interval.interval >= key);
+}
+
+
+
diff --git a/src/plugins/CMakeLists.txt b/src/plugins/CMakeLists.txt
index 742235894a8781e4dcfa09cb86985c73df74d046..d03717b6e155913e4d0f9bfe442ea7dd77b47a3e 100644
--- a/src/plugins/CMakeLists.txt
+++ b/src/plugins/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
+CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
 PROJECT(TDengine)
 
 ADD_SUBDIRECTORY(monitor)
diff --git a/src/plugins/http/CMakeLists.txt b/src/plugins/http/CMakeLists.txt
index 5d8b52986a6bb1cc451dac10cd92c8c37a352c4b..56c3c25d7c8522d2d31522f4d1b6dce4df1af42b 100644
--- a/src/plugins/http/CMakeLists.txt
+++ b/src/plugins/http/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
+CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
 PROJECT(TDengine)
 
 INCLUDE_DIRECTORIES(${TD_COMMUNITY_DIR}/deps/zlib-1.2.11/inc)
diff --git a/src/plugins/http/inc/httpInt.h b/src/plugins/http/inc/httpInt.h
index ebdfabf3101001d020e24bf63c3d699492ff21d0..ac182b707b585adf76b92cf4fbc027d22277f220 100644
--- a/src/plugins/http/inc/httpInt.h
+++ b/src/plugins/http/inc/httpInt.h
@@ -39,7 +39,7 @@
 #define HTTP_GC_TARGET_SIZE         512
 #define HTTP_WRITE_RETRY_TIMES      500
 #define HTTP_WRITE_WAIT_TIME_MS     5
-#define HTTP_SESSION_ID_LEN         (TSDB_USER_LEN + TSDB_PASSWORD_LEN)
+#define HTTP_SESSION_ID_LEN         (TSDB_USER_LEN + TSDB_KEY_LEN)
 
 typedef enum HttpReqType {
   HTTP_REQTYPE_OTHERS = 0,
@@ -147,7 +147,7 @@ typedef struct HttpContext {
   uint8_t      parsed;
   char         ipstr[22];
   char         user[TSDB_USER_LEN];  // parsed from auth token or login message
-  char         pass[TSDB_PASSWORD_LEN];
+  char         pass[TSDB_KEY_LEN];
   TAOS *       taos;
   void *       ppContext;
   HttpSession *session;
diff --git a/src/plugins/http/src/httpAuth.c b/src/plugins/http/src/httpAuth.c
index 8beef7c042ba6f0194d814753e15387e3d2b4a2b..56da8a7089e635effa0fc54e1aeb7137ea391c23 100644
--- a/src/plugins/http/src/httpAuth.c
+++ b/src/plugins/http/src/httpAuth.c
@@ -51,7 +51,7 @@ int32_t httpParseBasicAuthToken(HttpContext *pContext, char *token, int32_t len)
 
   char *password = user + 1;
   int32_t pass_len = (int32_t)((base64 + outlen) - password);
-  if (pass_len < 1 || pass_len >= TSDB_PASSWORD_LEN) {
+  if (pass_len < 1 || pass_len >= TSDB_KEY_LEN) {
     httpError("context:%p, fd:%d, basic token:%s parse password error", pContext, pContext->fd, token);
     free(base64);
     return -1;
@@ -73,7 +73,7 @@ int32_t httpParseTaosdAuthToken(HttpContext *pContext, char *token, int32_t len)
     if (base64) free(base64);
     return 01;
   }
-  if (outlen != (TSDB_USER_LEN + TSDB_PASSWORD_LEN)) {
+  if (outlen != (TSDB_USER_LEN + TSDB_KEY_LEN)) {
     httpError("context:%p, fd:%d, taosd token:%s length error", pContext, pContext->fd, token);
     free(base64);
     return -1;
@@ -103,8 +103,8 @@ int32_t httpGenTaosdAuthToken(HttpContext *pContext, char *token, int32_t maxLen
   size = sizeof(pContext->pass);
   tstrncpy(buffer + sizeof(pContext->user), pContext->pass, size);
 
-  char *encrypt = taosDesEncode(KEY_DES_4, buffer, TSDB_USER_LEN + TSDB_PASSWORD_LEN);
-  char *base64 = base64_encode((const unsigned char *)encrypt, TSDB_USER_LEN + TSDB_PASSWORD_LEN);
+  char *encrypt = taosDesEncode(KEY_DES_4, buffer, TSDB_USER_LEN + TSDB_KEY_LEN);
+  char *base64 = base64_encode((const unsigned char *)encrypt, TSDB_USER_LEN + TSDB_KEY_LEN);
 
   size_t len = strlen(base64);
   tstrncpy(token, base64, len + 1);
diff --git a/src/plugins/http/src/httpGcHandle.c b/src/plugins/http/src/httpGcHandle.c
index 5d4cb0c6809d063107cb37ccaac1200f2c87ee9d..c21799e736027eb4a021032d670f1b542500fe8f 100644
--- a/src/plugins/http/src/httpGcHandle.c
+++ b/src/plugins/http/src/httpGcHandle.c
@@ -59,11 +59,11 @@ bool gcGetUserFromUrl(HttpContext* pContext) {
 
 bool gcGetPassFromUrl(HttpContext* pContext) {
   HttpParser* pParser = pContext->parser;
-  if (pParser->path[GC_PASS_URL_POS].pos >= TSDB_PASSWORD_LEN || pParser->path[GC_PASS_URL_POS].pos <= 0) {
+  if (pParser->path[GC_PASS_URL_POS].pos >= TSDB_KEY_LEN || pParser->path[GC_PASS_URL_POS].pos <= 0) {
     return false;
   }
 
-  tstrncpy(pContext->pass, pParser->path[GC_PASS_URL_POS].str, TSDB_PASSWORD_LEN);
+  tstrncpy(pContext->pass, pParser->path[GC_PASS_URL_POS].str, TSDB_KEY_LEN);
   return true;
 }
 
diff --git a/src/plugins/http/src/httpRestHandle.c b/src/plugins/http/src/httpRestHandle.c
index 0a28c431ef313d36bd54b686e583e0dfb2313c0f..66f1db1a541322a0018e741dd537cd7b518f4bb5 100644
--- a/src/plugins/http/src/httpRestHandle.c
+++ b/src/plugins/http/src/httpRestHandle.c
@@ -72,11 +72,11 @@ bool restGetUserFromUrl(HttpContext* pContext) {
 
 bool restGetPassFromUrl(HttpContext* pContext) {
   HttpParser* pParser = pContext->parser;
-  if (pParser->path[REST_PASS_URL_POS].pos >= TSDB_PASSWORD_LEN || pParser->path[REST_PASS_URL_POS].pos <= 0) {
+  if (pParser->path[REST_PASS_URL_POS].pos >= TSDB_KEY_LEN || pParser->path[REST_PASS_URL_POS].pos <= 0) {
     return false;
   }
 
-  tstrncpy(pContext->pass, pParser->path[REST_PASS_URL_POS].str, TSDB_PASSWORD_LEN);
+  tstrncpy(pContext->pass, pParser->path[REST_PASS_URL_POS].str, TSDB_KEY_LEN);
   return true;
 }
 
diff --git a/src/plugins/http/src/httpTgHandle.c b/src/plugins/http/src/httpTgHandle.c
index e2b57b87bb3a10ee50edbf55ae2590289f940bf6..0a3ef539e37acd576596e5444ea3989602c00e90 100644
--- a/src/plugins/http/src/httpTgHandle.c
+++ b/src/plugins/http/src/httpTgHandle.c
@@ -324,7 +324,7 @@ bool tgGetUserFromUrl(HttpContext *pContext) {
 
 bool tgGetPassFromUrl(HttpContext *pContext) {
   HttpParser *pParser = pContext->parser;
-  if (pParser->path[TG_PASS_URL_POS].pos >= TSDB_PASSWORD_LEN || pParser->path[TG_PASS_URL_POS].pos <= 0) {
+  if (pParser->path[TG_PASS_URL_POS].pos >= TSDB_KEY_LEN || pParser->path[TG_PASS_URL_POS].pos <= 0) {
     return false;
   }
 
diff --git a/src/plugins/monitor/CMakeLists.txt b/src/plugins/monitor/CMakeLists.txt
index edea2187ea23caa5d809346a43d14f6ffaf8a309..90189c9d75b16a3689a8b6447d4ece4eb9766e1b 100644
--- a/src/plugins/monitor/CMakeLists.txt
+++ b/src/plugins/monitor/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
+CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
 PROJECT(TDengine)
 
 INCLUDE_DIRECTORIES(inc)
diff --git a/src/plugins/mqtt/CMakeLists.txt b/src/plugins/mqtt/CMakeLists.txt
index cf5729d6087065bd38a5bed140ec01b1b531f454..3761f70134501a5db7b7d5080e5a5bcf5f592858 100644
--- a/src/plugins/mqtt/CMakeLists.txt
+++ b/src/plugins/mqtt/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
+CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
 PROJECT(TDengine)
 
 INCLUDE_DIRECTORIES(inc)
diff --git a/src/query/CMakeLists.txt b/src/query/CMakeLists.txt
index c1024f008095be76dba0d8dd59447a489c015772..e403251858bdea2c89cc050ab3dbe3a5110843e3 100644
--- a/src/query/CMakeLists.txt
+++ b/src/query/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
+CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
 PROJECT(TDengine)
 
 INCLUDE_DIRECTORIES(${TD_COMMUNITY_DIR}/src/tsdb/inc)
diff --git a/src/query/inc/qPercentile.h b/src/query/inc/qPercentile.h
index c34c24c5b2883391f94d87db4f778907cc13d62c..f5b770593c1e30df8c3459676ffa42bbfc9cf0ae 100644
--- a/src/query/inc/qPercentile.h
+++ b/src/query/inc/qPercentile.h
@@ -16,32 +16,36 @@
 #ifndef TDENGINE_QPERCENTILE_H
 #define TDENGINE_QPERCENTILE_H
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #include "qExtbuffer.h"
 #include "qResultbuf.h"
 #include "qTsbuf.h"
 
 typedef struct MinMaxEntry {
   union {
-    double  dMinVal;
-    int32_t iMinVal;
-    int64_t i64MinVal;
+    double   dMinVal;
+    int64_t  i64MinVal;
+    uint64_t u64MinVal;
   };
   union {
     double  dMaxVal;
-    int32_t iMaxVal;
     int64_t i64MaxVal;
+    int64_t u64MaxVal;
   };
 } MinMaxEntry;
 
 typedef struct {
-  int32_t   size;
-  int32_t   pageId;
+  int32_t    size;
+  int32_t    pageId;
   tFilePage *data;
 } SSlotInfo;
 
 typedef struct tMemBucketSlot {
-  SSlotInfo      info;
-  MinMaxEntry    range;
+  SSlotInfo   info;
+  MinMaxEntry range;
 } tMemBucketSlot;
 
 struct tMemBucket;
@@ -52,16 +56,16 @@ typedef struct tMemBucket {
   int16_t       type;
   int16_t       bytes;
   int32_t       total;
-  int32_t       elemPerPage;   // number of elements for each object
-  int32_t       maxCapacity;   // maximum allowed number of elements that can be sort directly to get the result
-  int32_t       bufPageSize;   // disk page size
-  MinMaxEntry   range;           // value range
-  int32_t       times;         // count that has been checked for deciding the correct data value buckets.
+  int32_t       elemPerPage;  // number of elements for each object
+  int32_t       maxCapacity;  // maximum allowed number of elements that can be sort directly to get the result
+  int32_t       bufPageSize;  // disk page size
+  MinMaxEntry   range;        // value range
+  int32_t       times;        // count that has been checked for deciding the correct data value buckets.
   __compar_fn_t comparFn;
 
-  tMemBucketSlot *pSlots;
+  tMemBucketSlot *     pSlots;
   SDiskbasedResultBuf *pBuffer;
-  __perc_hash_func_t hashFunc;
+  __perc_hash_func_t   hashFunc;
 } tMemBucket;
 
 tMemBucket *tMemBucketCreate(int16_t nElemSize, int16_t dataType, double minval, double maxval);
@@ -73,3 +77,7 @@ int32_t tMemBucketPut(tMemBucket *pBucket, const void *data, size_t size);
 double getPercentile(tMemBucket *pMemBucket, double percent);
 
 #endif  // TDENGINE_QPERCENTILE_H
+
+#ifdef __cplusplus
+}
+#endif
\ No newline at end of file
diff --git a/src/query/src/qAggMain.c b/src/query/src/qAggMain.c
index 0427d65561ab48dc9bf5cb460a82510b4a97b4ce..3c7fd794bf88e0fee53e7d7c40bdf91a832b89f3 100644
--- a/src/query/src/qAggMain.c
+++ b/src/query/src/qAggMain.c
@@ -2545,7 +2545,7 @@ static void percentile_next_step(SQLFunctionCtx *pCtx) {
     if (pInfo->numOfElems == 0) {
       pResInfo->complete = true;
     } else {
-      pInfo->pMemBucket = tMemBucketCreate(pCtx->inputBytes, pCtx->inputType, GET_DOUBLE_VAL(&pInfo->minval), GET_DOUBLE_VAL(&pInfo->maxval));
+      pInfo->pMemBucket = tMemBucketCreate(pCtx->inputBytes, pCtx->inputType, pInfo->minval, pInfo->maxval);
     }
 
     pInfo->stage += 1;
diff --git a/src/query/src/qPercentile.c b/src/query/src/qPercentile.c
index 51125d62b92e022369d9332b78cb12a8650c75d9..3e4891092a9696f871f2295555156730bd7b224a 100644
--- a/src/query/src/qPercentile.c
+++ b/src/query/src/qPercentile.c
@@ -12,14 +12,14 @@
  * You should have received a copy of the GNU Affero General Public License
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
+#include "os.h"
 
 #include "qPercentile.h"
 #include "qResultbuf.h"
-#include "os.h"
 #include "queryLog.h"
 #include "taosdef.h"
-#include "tulog.h"
 #include "tcompare.h"
+#include "ttype.h"
 
 #define DEFAULT_NUM_OF_SLOT 1024
 
@@ -48,25 +48,15 @@ static tFilePage *loadDataFromFilePage(tMemBucket *pMemBucket, int32_t slotIdx)
 }
 
 static void resetBoundingBox(MinMaxEntry* range, int32_t type) {
-  switch (type) {
-    case TSDB_DATA_TYPE_BIGINT: {
-      range->i64MaxVal = INT64_MIN;
-      range->i64MinVal = INT64_MAX;
-      break;
-    };
-    case TSDB_DATA_TYPE_INT:
-    case TSDB_DATA_TYPE_SMALLINT:
-    case TSDB_DATA_TYPE_TINYINT: {
-      range->iMaxVal = INT32_MIN;
-      range->iMinVal = INT32_MAX;
-      break;
-    };
-    case TSDB_DATA_TYPE_DOUBLE:
-    case TSDB_DATA_TYPE_FLOAT: {
-      range->dMaxVal = -DBL_MAX;
-      range->dMinVal = DBL_MAX;
-      break;
-    }
+  if (IS_SIGNED_NUMERIC_TYPE(type)) {
+    range->i64MaxVal = INT64_MIN;
+    range->i64MinVal = INT64_MAX;
+  } else if (IS_UNSIGNED_NUMERIC_TYPE(type)) {
+    range->u64MaxVal = 0;
+    range->u64MinVal = UINT64_MAX;
+  } else {
+    range->dMaxVal = -DBL_MAX;
+    range->dMinVal = DBL_MAX;
   }
 }
 
@@ -75,23 +65,15 @@ static int32_t setBoundingBox(MinMaxEntry* range, int16_t type, double minval, d
     return -1;
   }
 
-  switch(type) {
-    case TSDB_DATA_TYPE_TINYINT:
-    case TSDB_DATA_TYPE_SMALLINT:
-    case TSDB_DATA_TYPE_INT:
-      range->iMinVal = (int32_t) minval;
-      range->iMaxVal = (int32_t) maxval;
-      break;
-
-    case TSDB_DATA_TYPE_BIGINT:
-      range->i64MinVal = (int64_t) minval;
-      range->i64MaxVal = (int64_t) maxval;
-      break;
-    case TSDB_DATA_TYPE_FLOAT:
-    case TSDB_DATA_TYPE_DOUBLE:
-      range->dMinVal = minval;
-      range->dMaxVal = maxval;
-      break;
+  if (IS_SIGNED_NUMERIC_TYPE(type)) {
+    range->i64MinVal = (int64_t) minval;
+    range->i64MaxVal = (int64_t) maxval;
+  } else if (IS_UNSIGNED_NUMERIC_TYPE(type)){
+    range->u64MinVal = (uint64_t) minval;
+    range->u64MaxVal = (uint64_t) maxval;
+  } else {
+    range->dMinVal = minval;
+    range->dMaxVal = maxval;
   }
 
   return 0;
@@ -120,117 +102,56 @@ double findOnlyResult(tMemBucket *pMemBucket) {
     tFilePage* pPage = getResBufPage(pMemBucket->pBuffer, pgInfo->pageId);
     assert(pPage->num == 1);
 
-    switch (pMemBucket->type) {
-      case TSDB_DATA_TYPE_INT:
-        return *(int32_t *)pPage->data;
-      case TSDB_DATA_TYPE_SMALLINT:
-        return *(int16_t *)pPage->data;
-      case TSDB_DATA_TYPE_TINYINT:
-        return *(int8_t *)pPage->data;
-      case TSDB_DATA_TYPE_BIGINT:
-        return (double)(*(int64_t *)pPage->data);
-      case TSDB_DATA_TYPE_DOUBLE: {
-        double dv = GET_DOUBLE_VAL(pPage->data);
-        return dv;
-      }
-      case TSDB_DATA_TYPE_FLOAT: {
-        float fv = GET_FLOAT_VAL(pPage->data);
-        return fv;
-      }
-      default:
-        return 0;
-    }
+    double v = 0;
+    GET_TYPED_DATA(v, double, pMemBucket->type, pPage->data);
+    return v;
   }
 
   return 0;
 }
 
-int32_t tBucketBigIntHash(tMemBucket *pBucket, const void *value) {
-  int64_t v = *(int64_t *)value;
-  int32_t index = -1;
-
-  int32_t halfSlot = pBucket->numOfSlots >> 1;
-//  int32_t bits = 32;//bitsOfNumber(pBucket->numOfSlots) - 1;
-
-  if (pBucket->range.i64MaxVal == INT64_MIN) {
-    if (v >= 0) {
-      index = (v >> (64 - 9)) + halfSlot;
-    } else {  // v<0
-      index = ((-v) >> (64 - 9));
-      index = -index + (halfSlot - 1);
-    }
+int32_t tBucketIntHash(tMemBucket *pBucket, const void *value) {
+  int64_t v = 0;
+  GET_TYPED_DATA(v, int64_t, pBucket->type, value);
 
-    return index;
+  int32_t index = -1;
+  // divide the value range into 1024 buckets
+  uint64_t span = pBucket->range.i64MaxVal - pBucket->range.i64MinVal;
+  if (span < pBucket->numOfSlots) {
+    int64_t delta = v - pBucket->range.i64MinVal;
+    index = (delta % pBucket->numOfSlots);
   } else {
-    // out of range
-    if (v < pBucket->range.i64MinVal || v > pBucket->range.i64MaxVal) {
-      return -1;
+    double slotSpan = (double)span / pBucket->numOfSlots;
+    index = (int32_t)((v - pBucket->range.i64MinVal) / slotSpan);
+    if (v == pBucket->range.i64MaxVal) {
+      index -= 1;
     }
-
-    // todo hash for bigint and float and double
-    int64_t span = pBucket->range.i64MaxVal - pBucket->range.i64MinVal;
-    if (span < pBucket->numOfSlots) {
-      int32_t delta = (int32_t)(v - pBucket->range.i64MinVal);
-      index = delta % pBucket->numOfSlots;
-    } else {
-      double slotSpan = (double)span / pBucket->numOfSlots;
-      index = (int32_t)((v - pBucket->range.i64MinVal) / slotSpan);
-      if (v == pBucket->range.i64MaxVal) {
-        index -= 1;
-      }
-    }
-
-    return index;
   }
+
+  assert(v >= pBucket->range.i64MinVal && v <= pBucket->range.i64MaxVal && index >= 0 && index < pBucket->numOfSlots);
+  return index;
 }
 
-// todo refactor to more generic
-int32_t tBucketIntHash(tMemBucket *pBucket, const void *value) {
-  int32_t v = 0;
-  switch(pBucket->type) {
-    case TSDB_DATA_TYPE_SMALLINT: v = *(int16_t*) value; break;
-    case TSDB_DATA_TYPE_TINYINT: v = *(int8_t*) value; break;
-    default: v = *(int32_t*) value;break;
-  }
+int32_t tBucketUintHash(tMemBucket *pBucket, const void *value) {
+  int64_t v = 0;
+  GET_TYPED_DATA(v, uint64_t, pBucket->type, value);
 
   int32_t index = -1;
-  if (pBucket->range.iMaxVal == INT32_MIN) {
-    /*
-     * taking negative integer into consideration,
-     * there is only half of pBucket->segs available for non-negative integer
-     */
-    int32_t halfSlot = pBucket->numOfSlots >> 1;
-    int32_t bits = 32;//bitsOfNumber(pBucket->numOfSlots) - 1;
-
-    if (v >= 0) {
-      index = (v >> (bits - 9)) + halfSlot;
-    } else {  // v < 0
-      index = ((-v) >> (32 - 9));
-      index = -index + (halfSlot - 1);
-    }
-
-    return index;
+  // divide the value range into 1024 buckets
+  uint64_t span = pBucket->range.u64MaxVal - pBucket->range.u64MinVal;
+  if (span < pBucket->numOfSlots) {
+    int64_t delta = v - pBucket->range.u64MinVal;
+    index = (int32_t) (delta % pBucket->numOfSlots);
   } else {
-    // out of range
-    if (v < pBucket->range.iMinVal || v > pBucket->range.iMaxVal) {
-      return -1;
+    double slotSpan = (double)span / pBucket->numOfSlots;
+    index = (int32_t)((v - pBucket->range.u64MinVal) / slotSpan);
+    if (v == pBucket->range.u64MaxVal) {
+      index -= 1;
     }
-
-    // divide a range of [iMinVal, iMaxVal] into 1024 buckets
-    int32_t span = pBucket->range.iMaxVal - pBucket->range.iMinVal;
-    if (span < pBucket->numOfSlots) {
-      int32_t delta = v - pBucket->range.iMinVal;
-      index = (delta % pBucket->numOfSlots);
-    } else {
-      double slotSpan = (double)span / pBucket->numOfSlots;
-      index = (int32_t)((v - pBucket->range.iMinVal) / slotSpan);
-      if (v == pBucket->range.iMaxVal) {
-        index -= 1;
-      }
-    }
-
-    return index;
   }
+
+  assert(v >= pBucket->range.u64MinVal && v <= pBucket->range.i64MaxVal && index >= 0 && index < pBucket->numOfSlots);
+  return index;
 }
 
 int32_t tBucketDoubleHash(tMemBucket *pBucket, const void *value) {
@@ -243,62 +164,30 @@ int32_t tBucketDoubleHash(tMemBucket *pBucket, const void *value) {
 
   int32_t index = -1;
 
-  if (pBucket->range.dMinVal == DBL_MAX) {
-    /*
-     * taking negative integer into consideration,
-     * there is only half of pBucket->segs available for non-negative integer
-     */
-    double x = DBL_MAX / (pBucket->numOfSlots >> 1);
-    double posx = (v + DBL_MAX) / x;
-    return ((int32_t)posx) % pBucket->numOfSlots;
+  // divide a range of [dMinVal, dMaxVal] into 1024 buckets
+  double span = pBucket->range.dMaxVal - pBucket->range.dMinVal;
+  if (span < pBucket->numOfSlots) {
+    int32_t delta = (int32_t)(v - pBucket->range.dMinVal);
+    index = (delta % pBucket->numOfSlots);
   } else {
-
-    // out of range
-    if (v < pBucket->range.dMinVal || v > pBucket->range.dMaxVal) {
-      return -1;
+    double slotSpan = span / pBucket->numOfSlots;
+    index = (int32_t)((v - pBucket->range.dMinVal) / slotSpan);
+    if (v == pBucket->range.dMaxVal) {
+      index -= 1;
     }
-
-    // divide a range of [dMinVal, dMaxVal] into 1024 buckets
-    double span = pBucket->range.dMaxVal - pBucket->range.dMinVal;
-    if (span < pBucket->numOfSlots) {
-      int32_t delta = (int32_t)(v - pBucket->range.dMinVal);
-      index = (delta % pBucket->numOfSlots);
-    } else {
-      double slotSpan = span / pBucket->numOfSlots;
-      index = (int32_t)((v - pBucket->range.dMinVal) / slotSpan);
-      if (v == pBucket->range.dMaxVal) {
-        index -= 1;
-      }
-    }
-
-    if (index < 0 || index > pBucket->numOfSlots) {
-      uError("error in hash process. slot id: %d", index);
-    }
-
-    return index;
   }
+
+  assert(v >= pBucket->range.dMinVal && v <= pBucket->range.dMaxVal && index >= 0 && index < pBucket->numOfSlots);
+  return index;
 }
 
 static __perc_hash_func_t getHashFunc(int32_t type) {
-  switch (type) {
-    case TSDB_DATA_TYPE_INT:
-    case TSDB_DATA_TYPE_SMALLINT:
-    case TSDB_DATA_TYPE_TINYINT: {
-      return tBucketIntHash;
-    };
-
-    case TSDB_DATA_TYPE_DOUBLE:
-    case TSDB_DATA_TYPE_FLOAT: {
-      return tBucketDoubleHash;
-    };
-
-    case TSDB_DATA_TYPE_BIGINT: {
-      return tBucketBigIntHash;
-    };
-
-    default: {
-      return NULL;
-    }
+  if (IS_SIGNED_NUMERIC_TYPE(type)) {
+    return tBucketIntHash;
+  } else if (IS_UNSIGNED_NUMERIC_TYPE(type)) {
+    return tBucketUintHash;
+  } else {
+    return tBucketDoubleHash;
   }
 }
 
@@ -328,7 +217,7 @@ tMemBucket *tMemBucketCreate(int16_t nElemSize, int16_t dataType, double minval,
   pBucket->maxCapacity = 200000;
 
   if (setBoundingBox(&pBucket->range, pBucket->type, minval, maxval) != 0) {
-    uError("MemBucket:%p, invalid value range: %f-%f", pBucket, minval, maxval);
+    qError("MemBucket:%p, invalid value range: %f-%f", pBucket, minval, maxval);
     free(pBucket);
     return NULL;
   }
@@ -338,7 +227,7 @@ tMemBucket *tMemBucketCreate(int16_t nElemSize, int16_t dataType, double minval,
 
   pBucket->hashFunc = getHashFunc(pBucket->type);
   if (pBucket->hashFunc == NULL) {
-    uError("MemBucket:%p, not support data type %d, failed", pBucket, pBucket->type);
+    qError("MemBucket:%p, not support data type %d, failed", pBucket, pBucket->type);
     free(pBucket);
     return NULL;
   }
@@ -357,7 +246,7 @@ tMemBucket *tMemBucketCreate(int16_t nElemSize, int16_t dataType, double minval,
     return NULL;
   }
   
-  uDebug("MemBucket:%p, elem size:%d", pBucket, pBucket->bytes);
+  qDebug("MemBucket:%p, elem size:%d", pBucket, pBucket->bytes);
   return pBucket;
 }
 
@@ -372,77 +261,41 @@ void tMemBucketDestroy(tMemBucket *pBucket) {
 }
 
 void tMemBucketUpdateBoundingBox(MinMaxEntry *r, const char *data, int32_t dataType) {
-  switch (dataType) {
-    case TSDB_DATA_TYPE_INT: {
-      int32_t val = *(int32_t *)data;
-      if (r->iMinVal > val) {
-        r->iMinVal = val;
-      }
+  if (IS_SIGNED_NUMERIC_TYPE(dataType)) {
+    int64_t v = 0;
+    GET_TYPED_DATA(v, int64_t, dataType, data);
 
-      if (r->iMaxVal < val) {
-        r->iMaxVal = val;
-      }
-      break;
-    };
-    case TSDB_DATA_TYPE_BIGINT: {
-      int64_t val = *(int64_t *)data;
-      if (r->i64MinVal > val) {
-        r->i64MinVal = val;
-      }
-
-      if (r->i64MaxVal < val) {
-        r->i64MaxVal = val;
-      }
-      break;
-    };
-    case TSDB_DATA_TYPE_SMALLINT: {
-      int32_t val = *(int16_t *)data;
-      if (r->iMinVal > val) {
-        r->iMinVal = val;
-      }
-
-      if (r->iMaxVal < val) {
-        r->iMaxVal = val;
-      }
-      break;
-    };
-    case TSDB_DATA_TYPE_TINYINT: {
-      int32_t val = *(int8_t *)data;
-      if (r->iMinVal > val) {
-        r->iMinVal = val;
-      }
+    if (r->i64MinVal > v) {
+      r->i64MinVal = v;
+    }
 
-      if (r->iMaxVal < val) {
-        r->iMaxVal = val;
-      }
+    if (r->i64MaxVal < v) {
+      r->i64MaxVal = v;
+    }
+  } else if (IS_UNSIGNED_NUMERIC_TYPE(dataType)) {
+    uint64_t v = 0;
+    GET_TYPED_DATA(v, uint64_t, dataType, data);
 
-      break;
-    };
-    case TSDB_DATA_TYPE_DOUBLE: {
-      // double val = *(double *)data;
-      double val = GET_DOUBLE_VAL(data);
-      if (r->dMinVal > val) {
-        r->dMinVal = val;
-      }
+    if (r->i64MinVal > v) {
+      r->i64MinVal = v;
+    }
 
-      if (r->dMaxVal < val) {
-        r->dMaxVal = val;
-      }
-      break;
-    };
-    case TSDB_DATA_TYPE_FLOAT: {
-      double val = GET_FLOAT_VAL(data);
+    if (r->i64MaxVal < v) {
+      r->i64MaxVal = v;
+    }
+  } else if (IS_FLOAT_TYPE(dataType)) {
+    double v = 0;
+    GET_TYPED_DATA(v, double, dataType, data);
 
-      if (r->dMinVal > val) {
-        r->dMinVal = val;
-      }
+    if (r->dMinVal > v) {
+      r->dMinVal = v;
+    }
 
-      if (r->dMaxVal < val) {
-        r->dMaxVal = val;
-      }
-      break;
-    };
-    default: { assert(false); }
+    if (r->dMaxVal < v) {
+      r->dMaxVal = v;
+    }
+  } else {
+    assert(0);
   }
 }
 
@@ -452,16 +305,13 @@ void tMemBucketUpdateBoundingBox(MinMaxEntry *r, const char *data, int32_t dataT
 int32_t tMemBucketPut(tMemBucket *pBucket, const void *data, size_t size) {
   assert(pBucket != NULL && data != NULL && size > 0);
 
-  pBucket->total += (int32_t)size;
-
+  int32_t count = 0;
   int32_t bytes = pBucket->bytes;
   for (int32_t i = 0; i < size; ++i) {
     char *d = (char *) data + i * bytes;
+    count += 1;
 
     int32_t index = (pBucket->hashFunc)(pBucket, d);
-    if (index == -1) {  // the value is out of range, do not add it into bucket
-      return -1;
-    }
 
     tMemBucketSlot *pSlot = &pBucket->pSlots[index];
     tMemBucketUpdateBoundingBox(&pSlot->range, d, pBucket->type);
@@ -489,64 +339,11 @@ int32_t tMemBucketPut(tMemBucket *pBucket, const void *data, size_t size) {
     pSlot->info.size += 1;
   }
 
+  pBucket->total += count;
   return 0;
 }
 
 ////////////////////////////////////////////////////////////////////////////////////////////
-static UNUSED_FUNC void findMaxMinValue(tMemBucket *pMemBucket, double *maxVal, double *minVal) {
-  *minVal = DBL_MAX;
-  *maxVal = -DBL_MAX;
-
-  for (int32_t i = 0; i < pMemBucket->numOfSlots; ++i) {
-    tMemBucketSlot *pSlot = &pMemBucket->pSlots[i];
-    if (pSlot->info.size == 0) {
-      continue;
-    }
-
-    switch (pMemBucket->type) {
-      case TSDB_DATA_TYPE_INT:
-      case TSDB_DATA_TYPE_SMALLINT:
-      case TSDB_DATA_TYPE_TINYINT: {
-        double minv = pSlot->range.iMinVal;
-        double maxv = pSlot->range.iMaxVal;
-
-        if (*minVal > minv) {
-          *minVal = minv;
-        }
-        if (*maxVal < maxv) {
-          *maxVal = maxv;
-        }
-        break;
-      }
-      case TSDB_DATA_TYPE_DOUBLE:
-      case TSDB_DATA_TYPE_FLOAT: {
-        double minv = pSlot->range.dMinVal;
-        double maxv = pSlot->range.dMaxVal;
-
-        if (*minVal > minv) {
-          *minVal = minv;
-        }
-        if (*maxVal < maxv) {
-          *maxVal = maxv;
-        }
-        break;
-      }
-      case TSDB_DATA_TYPE_BIGINT: {
-        double minv = (double)pSlot->range.i64MinVal;
-        double maxv = (double)pSlot->range.i64MaxVal;
-
-        if (*minVal > minv) {
-          *minVal = minv;
-        }
-        if (*maxVal < maxv) {
-          *maxVal = maxv;
-        }
-        break;
-      }
-    }
-  }
-}
-
 /*
  *
  * now, we need to find the minimum value of the next slot for
@@ -565,7 +362,6 @@ static MinMaxEntry getMinMaxEntryOfNextSlotWithData(tMemBucket *pMemBucket, int3
 }
 
 static bool isIdenticalData(tMemBucket *pMemBucket, int32_t index);
-char *getFirstElemOfMemBuffer(tMemBucketSlot *pSeg, int32_t slotIdx, tFilePage *pPage);
 
 static double getIdenticalDataVal(tMemBucket* pMemBucket, int32_t slotIndex) {
   assert(isIdenticalData(pMemBucket, slotIndex));
@@ -573,24 +369,12 @@ static double getIdenticalDataVal(tMemBucket* pMemBucket, int32_t slotIndex) {
   tMemBucketSlot *pSlot = &pMemBucket->pSlots[slotIndex];
 
   double finalResult = 0.0;
-  switch (pMemBucket->type) {
-    case TSDB_DATA_TYPE_SMALLINT:
-    case TSDB_DATA_TYPE_TINYINT:
-    case TSDB_DATA_TYPE_INT: {
-      finalResult = pSlot->range.iMinVal;
-      break;
-    }
-
-    case TSDB_DATA_TYPE_FLOAT:
-    case TSDB_DATA_TYPE_DOUBLE: {
-      finalResult = pSlot->range.dMinVal;
-      break;
-    };
-
-    case TSDB_DATA_TYPE_BIGINT: {
-      finalResult = (double)pSlot->range.i64MinVal;
-      break;
-    }
+  if (IS_SIGNED_NUMERIC_TYPE(pMemBucket->type)) {
+    finalResult = (double) pSlot->range.i64MinVal;
+  } else if (IS_UNSIGNED_NUMERIC_TYPE(pMemBucket->type)) {
+    finalResult = (double) pSlot->range.u64MinVal;
+  } else {
+    finalResult = (double) pSlot->range.dMinVal;
   }
 
   return finalResult;
@@ -616,26 +400,16 @@ double getPercentileImpl(tMemBucket *pMemBucket, int32_t count, double fraction)
 
         double maxOfThisSlot = 0;
         double minOfNextSlot = 0;
-        switch (pMemBucket->type) {
-          case TSDB_DATA_TYPE_INT:
-          case TSDB_DATA_TYPE_SMALLINT:
-          case TSDB_DATA_TYPE_TINYINT: {
-            maxOfThisSlot = pSlot->range.iMaxVal;
-            minOfNextSlot = next.iMinVal;
-            break;
-          };
-          case TSDB_DATA_TYPE_FLOAT:
-          case TSDB_DATA_TYPE_DOUBLE: {
-            maxOfThisSlot = pSlot->range.dMaxVal;
-            minOfNextSlot = next.dMinVal;
-            break;
-          };
-          case TSDB_DATA_TYPE_BIGINT: {
-            maxOfThisSlot = (double)pSlot->range.i64MaxVal;
-            minOfNextSlot = (double)next.i64MinVal;
-            break;
-          }
-        };
+        if (IS_SIGNED_NUMERIC_TYPE(pMemBucket->type)) {
+          maxOfThisSlot = (double) pSlot->range.i64MaxVal;
+          minOfNextSlot = (double) next.i64MinVal;
+        } else if (IS_UNSIGNED_NUMERIC_TYPE(pMemBucket->type)) {
+          maxOfThisSlot = (double) pSlot->range.u64MaxVal;
+          minOfNextSlot = (double) next.u64MinVal;
+        } else {
+          maxOfThisSlot = (double) pSlot->range.dMaxVal;
+          minOfNextSlot = (double) next.dMinVal;
+        }
 
         assert(minOfNextSlot > maxOfThisSlot);
 
@@ -652,38 +426,8 @@ double getPercentileImpl(tMemBucket *pMemBucket, int32_t count, double fraction)
         char *nextVal = thisVal + pMemBucket->bytes;
 
         double td = 1.0, nd = 1.0;
-        switch (pMemBucket->type) {
-          case TSDB_DATA_TYPE_SMALLINT: {
-            td = *(int16_t *)thisVal;
-            nd = *(int16_t *)nextVal;
-            break;
-          }
-          case TSDB_DATA_TYPE_TINYINT: {
-            td = *(int8_t *)thisVal;
-            nd = *(int8_t *)nextVal;
-            break;
-          }
-          case TSDB_DATA_TYPE_INT: {
-            td = *(int32_t *)thisVal;
-            nd = *(int32_t *)nextVal;
-            break;
-          };
-          case TSDB_DATA_TYPE_FLOAT: {
-            td = GET_FLOAT_VAL(thisVal);
-            nd = GET_FLOAT_VAL(nextVal);
-            break;
-          }
-          case TSDB_DATA_TYPE_DOUBLE: {
-            td = GET_DOUBLE_VAL(thisVal);
-            nd = GET_DOUBLE_VAL(nextVal);
-            break;
-          }
-          case TSDB_DATA_TYPE_BIGINT: {
-            td = (double)*(int64_t *)thisVal;
-            nd = (double)*(int64_t *)nextVal;
-            break;
-          }
-        }
+        GET_TYPED_DATA(td, double, pMemBucket->type, thisVal);
+        GET_TYPED_DATA(nd, double, pMemBucket->type, nextVal);
 
         double val = (1 - fraction) * td + fraction * nd;
         tfree(buffer);
@@ -696,7 +440,7 @@ double getPercentileImpl(tMemBucket *pMemBucket, int32_t count, double fraction)
 
        // try next round
        pMemBucket->times += 1;
-       uDebug("MemBucket:%p, start next round data bucketing, time:%d", pMemBucket, pMemBucket->times);
+       qDebug("MemBucket:%p, start next round data bucketing, time:%d", pMemBucket, pMemBucket->times);
 
        pMemBucket->range = pSlot->range;
        pMemBucket->total = 0;
@@ -741,20 +485,14 @@ double getPercentile(tMemBucket *pMemBucket, double percent) {
   if (fabs(percent - 100.0) < DBL_EPSILON || (percent < DBL_EPSILON)) {
     MinMaxEntry* pRange = &pMemBucket->range;
 
-    switch(pMemBucket->type) {
-      case TSDB_DATA_TYPE_TINYINT:
-      case TSDB_DATA_TYPE_SMALLINT:
-      case TSDB_DATA_TYPE_INT:
-        return fabs(percent - 100) < DBL_EPSILON? pRange->iMaxVal:pRange->iMinVal;
-      case TSDB_DATA_TYPE_BIGINT: {
-        double v = (double)(fabs(percent - 100) < DBL_EPSILON ? pRange->i64MaxVal : pRange->i64MinVal);
-        return v;
-      }
-      case TSDB_DATA_TYPE_FLOAT:
-      case TSDB_DATA_TYPE_DOUBLE:
-        return fabs(percent - 100) < DBL_EPSILON? pRange->dMaxVal:pRange->dMinVal;
-        default:
-        return -1;
+    if (IS_SIGNED_NUMERIC_TYPE(pMemBucket->type)) {
+      double v = (double)(fabs(percent - 100) < DBL_EPSILON ? pRange->i64MaxVal : pRange->i64MinVal);
+      return v;
+    } else if (IS_UNSIGNED_NUMERIC_TYPE(pMemBucket->type)) {
+      double v = (double)(fabs(percent - 100) < DBL_EPSILON ? pRange->u64MaxVal : pRange->u64MinVal);
+      return v;
+    } else {
+      return fabs(percent - 100) < DBL_EPSILON? pRange->dMaxVal:pRange->dMinVal;
     }
   }
 
@@ -771,40 +509,9 @@ double getPercentile(tMemBucket *pMemBucket, double percent) {
 bool isIdenticalData(tMemBucket *pMemBucket, int32_t index) {
   tMemBucketSlot *pSeg = &pMemBucket->pSlots[index];
 
-  if (pMemBucket->type == TSDB_DATA_TYPE_INT || pMemBucket->type == TSDB_DATA_TYPE_BIGINT ||
-      pMemBucket->type == TSDB_DATA_TYPE_SMALLINT || pMemBucket->type == TSDB_DATA_TYPE_TINYINT) {
-    return pSeg->range.i64MinVal == pSeg->range.i64MaxVal;
-  }
-
-  if (pMemBucket->type == TSDB_DATA_TYPE_FLOAT || pMemBucket->type == TSDB_DATA_TYPE_DOUBLE) {
+  if (IS_FLOAT_TYPE(pMemBucket->type)) {
     return fabs(pSeg->range.dMaxVal - pSeg->range.dMinVal) < DBL_EPSILON;
+  } else {
+    return pSeg->range.i64MinVal == pSeg->range.i64MaxVal;
   }
-
-  return false;
-}
-
-/*
- * get the first element of one slot into memory.
- * if no data of current slot in memory, load it from disk
- */
-char *getFirstElemOfMemBuffer(tMemBucketSlot *pSeg, int32_t slotIdx, tFilePage *pPage) {
-//  STSBuf *pMemBuffer = pSeg->pBuffer[slotIdx];
-  char *thisVal = NULL;
-
-//  if (pSeg->pBuffer[slotIdx]->numOfTotal != 0) {
-////    thisVal = pSeg->pBuffer[slotIdx]->pHead->item.data;
-//  } else {
-//    /*
-//     * no data in memory, load one page into memory
-//     */
-//    tFlushoutInfo *pFlushInfo = &pMemBuffer->fileMeta.flushoutData.pFlushoutInfo[0];
-//    assert(pFlushInfo->numOfPages == pMemBuffer->fileMeta.nFileSize);
-//    int32_t ret;
-//    ret = fseek(pMemBuffer->file, pFlushInfo->startPageId * pMemBuffer->pageSize, SEEK_SET);
-//    UNUSED(ret);
-//    size_t sz = fread(pPage, pMemBuffer->pageSize, 1, pMemBuffer->file);
-//    UNUSED(sz);
-//    thisVal = pPage->data;
-//  }
-  return thisVal;
 }
diff --git a/src/query/tests/CMakeLists.txt b/src/query/tests/CMakeLists.txt
index 1856223391ae719ef98492160da9810826b983a9..c3798b869eb6c02008043346d70b52592239cad0 100644
--- a/src/query/tests/CMakeLists.txt
+++ b/src/query/tests/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
+CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
 PROJECT(TDengine)
 
 FIND_PATH(HEADER_GTEST_INCLUDE_DIR gtest.h /usr/include/gtest /usr/local/include/gtest)
diff --git a/src/query/tests/percentileTest.cpp b/src/query/tests/percentileTest.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..f1fc45850138ba287b4597c51c4bb5220626ad8b
--- /dev/null
+++ b/src/query/tests/percentileTest.cpp
@@ -0,0 +1,254 @@
+#include <gtest/gtest.h>
+#include <iostream>
+
+#include "qResultbuf.h"
+#include "taos.h"
+#include "taosdef.h"
+
+#include "qPercentile.h"
+
+namespace {
+tMemBucket *createBigIntDataBucket(int32_t start, int32_t end) {
+  tMemBucket *pBucket = tMemBucketCreate(sizeof(int64_t), TSDB_DATA_TYPE_BIGINT, start, end);
+  for (int32_t i = start; i <= end; ++i) {
+    int64_t val = i;
+    tMemBucketPut(pBucket, &val, 1);
+  }
+
+  return pBucket;
+}
+
+tMemBucket *createIntDataBucket(int32_t start, int32_t end) {
+  tMemBucket *pBucket = tMemBucketCreate(sizeof(int32_t), TSDB_DATA_TYPE_INT, start, end);
+
+  for (int32_t i = start; i <= end; ++i) {
+    int32_t val = i;
+    tMemBucketPut(pBucket, &val, 1);
+  }
+
+  return pBucket;
+}
+
+tMemBucket *createDoubleDataBucket(int32_t start, int32_t end) {
+  tMemBucket *pBucket = tMemBucketCreate(sizeof(double), TSDB_DATA_TYPE_DOUBLE, start, end);
+  for (int32_t i = start; i <= end; ++i) {
+    double  val = i;
+    int32_t ret = tMemBucketPut(pBucket, &val, 1);
+    if (ret != 0) {
+      printf("value out of range:%f", val);
+    }
+  }
+
+  return pBucket;
+}
+
+tMemBucket *createUnsignedDataBucket(int32_t start, int32_t end, int32_t type) {
+  tMemBucket *pBucket = tMemBucketCreate(tDataTypeDesc[type].nSize, type, start, end);
+  for (int32_t i = start; i <= end; ++i) {
+    uint64_t k = i;
+    int32_t ret = tMemBucketPut(pBucket, &k, 1);
+    if (ret != 0) {
+      printf("value out of range:%f", k);
+    }
+  }
+
+  return pBucket;
+}
+
+void intDataTest() {
+  printf("running %s\n", __FUNCTION__);
+
+  tMemBucket *pBucket = NULL;
+  double      result = 0.;
+
+  pBucket = createIntDataBucket(0, 0);
+  result = getPercentile(pBucket, 0);
+  ASSERT_DOUBLE_EQ(result, 0);
+  tMemBucketDestroy(pBucket);
+
+  pBucket = createIntDataBucket(0, 1);
+  result = getPercentile(pBucket, 100);
+  ASSERT_DOUBLE_EQ(result, 1);
+
+  result = getPercentile(pBucket, 0);
+  ASSERT_DOUBLE_EQ(result, 0);
+  tMemBucketDestroy(pBucket);
+
+  pBucket = createIntDataBucket(-1, 1);
+
+  result = getPercentile(pBucket, 50);
+  ASSERT_DOUBLE_EQ(result, 0);
+
+  result = getPercentile(pBucket, 0);
+  ASSERT_DOUBLE_EQ(result, -1);
+
+  result = getPercentile(pBucket, 75);
+  ASSERT_DOUBLE_EQ(result, 0.5);
+
+  result = getPercentile(pBucket, 100);
+  ASSERT_DOUBLE_EQ(result, 1);
+  tMemBucketDestroy(pBucket);
+
+  pBucket = createIntDataBucket(0, 99999);
+  result = getPercentile(pBucket, 50);
+  ASSERT_DOUBLE_EQ(result, 49999.5);
+
+  tMemBucketDestroy(pBucket);
+}
+
+void bigintDataTest() {
+  printf("running %s\n", __FUNCTION__);
+
+  tMemBucket *pBucket = NULL;
+  double      result = 0.0;
+
+  pBucket = createBigIntDataBucket(-1000, 1000);
+  result = getPercentile(pBucket, 50);
+  ASSERT_DOUBLE_EQ(result, 0.);
+  tMemBucketDestroy(pBucket);
+
+  pBucket = createBigIntDataBucket(-10000, 10000);
+  result = getPercentile(pBucket, 100);
+  ASSERT_DOUBLE_EQ(result, 10000.0);
+  tMemBucketDestroy(pBucket);
+
+  pBucket = createBigIntDataBucket(-10000, 10000);
+  result = getPercentile(pBucket, 75);
+  ASSERT_DOUBLE_EQ(result, 5000.0);
+
+  tMemBucketDestroy(pBucket);
+}
+
+void doubleDataTest() {
+  printf("running %s\n", __FUNCTION__);
+
+  tMemBucket *pBucket = NULL;
+  double      result = 0;
+
+  pBucket = createDoubleDataBucket(-10, 10);
+  result = getPercentile(pBucket, 0);
+  ASSERT_DOUBLE_EQ(result, -10.0);
+
+  printf("result is: %lf\n", result);
+  tMemBucketDestroy(pBucket);
+
+  pBucket = createDoubleDataBucket(-100000, 100000);
+  result = getPercentile(pBucket, 25);
+  ASSERT_DOUBLE_EQ(result, -50000);
+
+  printf("result is: %lf\n", result);
+
+  tMemBucketDestroy(pBucket);
+
+  pBucket = createDoubleDataBucket(-100000, 100000);
+  result = getPercentile(pBucket, 50);
+  ASSERT_DOUBLE_EQ(result, 0);
+
+  tMemBucketDestroy(pBucket);
+
+  pBucket = createDoubleDataBucket(-100000, 100000);
+  result = getPercentile(pBucket, 75);
+  ASSERT_DOUBLE_EQ(result, 50000);
+  tMemBucketDestroy(pBucket);
+
+  pBucket = createDoubleDataBucket(-100000, 100000);
+
+  result = getPercentile(pBucket, 100);
+  ASSERT_DOUBLE_EQ(result, 100000.0);
+
+  printf("result is: %lf\n", result);
+  tMemBucketDestroy(pBucket);
+}
+
+/*
+ * large data test, we employ 0.1billion double data to calculated the percentile
+ * which is 800MB data
+ */
+void largeDataTest() {
+  printf("running : %s\n", __FUNCTION__);
+
+  tMemBucket *pBucket = NULL;
+  double      result = 0;
+
+  struct timeval tv;
+  gettimeofday(&tv, NULL);
+
+  int64_t start = tv.tv_sec;
+  printf("start time: %" PRId64 "\n", tv.tv_sec);
+  pBucket = createDoubleDataBucket(0, 100000000);
+  result = getPercentile(pBucket, 50);
+  ASSERT_DOUBLE_EQ(result, 50000000);
+
+  gettimeofday(&tv, NULL);
+
+  printf("total elapsed time: %" PRId64 " sec.", -start + tv.tv_sec);
+  printf("the result of %d is: %lf\n", 50, result);
+  tMemBucketDestroy(pBucket);
+}
+
+void qsortTest() {
+  printf("running : %s\n", __FUNCTION__);
+
+  SSchema field[1] = {
+      {TSDB_DATA_TYPE_INT, "k", sizeof(int32_t)},
+  };
+
+  const int32_t num = 2000;
+
+  int32_t *d = (int32_t *)malloc(sizeof(int32_t) * num);
+  for (int32_t i = 0; i < num; ++i) {
+    d[i] = i % 4;
+  }
+
+  const int32_t     numOfOrderCols = 1;
+  int32_t           orderColIdx = 0;
+  SColumnModel *    pModel = createColumnModel(field, 1, 1000);
+  tOrderDescriptor *pDesc = tOrderDesCreate(&orderColIdx, numOfOrderCols, pModel, 1);
+
+  tColDataQSort(pDesc, num, 0, num - 1, (char *)d, 1);
+
+  for (int32_t i = 0; i < num; ++i) {
+    printf("%d\t", d[i]);
+  }
+  printf("\n");
+
+  destroyColumnModel(pModel);
+}
+
+void unsignedDataTest() {
+  printf("running %s\n", __FUNCTION__);
+
+  tMemBucket *pBucket = NULL;
+  double      result = 0.0;
+
+  pBucket = createUnsignedDataBucket(0, 1000, TSDB_DATA_TYPE_UINT);
+  result = getPercentile(pBucket, 50);
+  ASSERT_DOUBLE_EQ(result, 500.0);
+  tMemBucketDestroy(pBucket);
+
+  pBucket = createUnsignedDataBucket(0, 10000, TSDB_DATA_TYPE_UBIGINT);
+  result = getPercentile(pBucket, 100);
+  ASSERT_DOUBLE_EQ(result, 10000.0);
+
+  result = getPercentile(pBucket, 0);
+  ASSERT_DOUBLE_EQ(result, 0.0);
+
+  result = getPercentile(pBucket, 50);
+  ASSERT_DOUBLE_EQ(result, 5000);
+
+  result = getPercentile(pBucket, 75);
+  ASSERT_DOUBLE_EQ(result, 7500);
+  tMemBucketDestroy(pBucket);
+
+}
+
+}  // namespace
+
+TEST(testCase, percentileTest) {
+  //  qsortTest();
+  intDataTest();
+  bigintDataTest();
+  doubleDataTest();
+  unsignedDataTest();
+  largeDataTest();
+}
diff --git a/src/rpc/CMakeLists.txt b/src/rpc/CMakeLists.txt
index f94b4aeb6d21277b6b845587cd35a2c98e0bc0b0..02a1e7c2d81d13194ca819c703657df5e1f3fb3b 100644
--- a/src/rpc/CMakeLists.txt
+++ b/src/rpc/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
+CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
 PROJECT(TDengine)
 
 INCLUDE_DIRECTORIES(inc)
diff --git a/src/rpc/src/rpcMain.c b/src/rpc/src/rpcMain.c
index af51733c21fa417c9a8de6d53e15ec92555f35cd..17b80a0afb6f175a73dce5cb361674030561c96e 100644
--- a/src/rpc/src/rpcMain.c
+++ b/src/rpc/src/rpcMain.c
@@ -1390,7 +1390,7 @@ static void rpcProcessRetryTimer(void *param, void *tmrId) {
         pConn->pContext->code = TSDB_CODE_RPC_NETWORK_UNAVAIL;
         pConn->pContext->pConn = NULL;
         pConn->pReqMsg = NULL;
-        taosTmrStart(rpcProcessConnError, 0, pConn->pContext, pRpc->tmrCtrl);
+        taosTmrStart(rpcProcessConnError, 1, pConn->pContext, pRpc->tmrCtrl);
         rpcReleaseConn(pConn);
       }
     }
diff --git a/src/rpc/src/rpcTcp.c b/src/rpc/src/rpcTcp.c
index 178b96c423641ccc6be84c57ca71fe7b85fd7a33..daf3bd86c168ea75c29f5229cecea1acd0c66cd3 100644
--- a/src/rpc/src/rpcTcp.c
+++ b/src/rpc/src/rpcTcp.c
@@ -241,7 +241,7 @@ static void *taosAcceptTcpConnection(void *arg) {
     }
 
     taosKeepTcpAlive(connFd);
-    struct timeval to={1, 0};
+    struct timeval to={5, 0};
     int32_t ret = taosSetSockOpt(connFd, SOL_SOCKET, SO_RCVTIMEO, &to, sizeof(to));
     if (ret != 0) {
       taosCloseSocket(connFd);
diff --git a/src/rpc/test/CMakeLists.txt b/src/rpc/test/CMakeLists.txt
index 383ce1b0f64cb218800211de3576af58056c6af1..9a4bcc353d9bd1ad8ee8b6ef546f8e4a44f75559 100644
--- a/src/rpc/test/CMakeLists.txt
+++ b/src/rpc/test/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
+CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
 PROJECT(TDengine)
 
 INCLUDE_DIRECTORIES(${TD_COMMUNITY_DIR}/src/rpc/inc)
diff --git a/src/sync/CMakeLists.txt b/src/sync/CMakeLists.txt
index aa38a56f38146bafda8a10ca786bf085bb4ea339..6a533808415929776be46a96266dd7cdaeca0bf3 100644
--- a/src/sync/CMakeLists.txt
+++ b/src/sync/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
+CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
 PROJECT(TDengine)
 
 INCLUDE_DIRECTORIES(inc)
diff --git a/src/sync/test/CMakeLists.txt b/src/sync/test/CMakeLists.txt
index 27614454f9f8924de561f0907f06078b03708363..256e87580d9372f0ade7200591303211f0140952 100644
--- a/src/sync/test/CMakeLists.txt
+++ b/src/sync/test/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
+CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
 PROJECT(TDengine)
 
 IF (TD_LINUX)
diff --git a/src/tsdb/CMakeLists.txt b/src/tsdb/CMakeLists.txt
index d86b104f234a7e39bd67f728370e188c965cf42a..d8bc20ca9971a4bd398e9c5d1d673dd30acc7dc5 100644
--- a/src/tsdb/CMakeLists.txt
+++ b/src/tsdb/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
+CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
 PROJECT(TDengine)
 
 INCLUDE_DIRECTORIES(inc)
diff --git a/src/util/CMakeLists.txt b/src/util/CMakeLists.txt
index 78b9c90979fa74bdd0ce5ecfd53042db30e4e8fa..48b4d7656105aed1a983fad59c20195f0d3fcb77 100644
--- a/src/util/CMakeLists.txt
+++ b/src/util/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
+CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
 PROJECT(TDengine)
 
 INCLUDE_DIRECTORIES(${TD_COMMUNITY_DIR}/src/rpc/inc)
diff --git a/src/util/src/tcompare.c b/src/util/src/tcompare.c
index de6fbe7302d5971c29fc08cda4a3ab67c249ed77..75ac9307234cbf93c157ec091893dc3a6134ed8f 100644
--- a/src/util/src/tcompare.c
+++ b/src/util/src/tcompare.c
@@ -30,24 +30,32 @@ int32_t compareInt8Val(const void *pLeft, const void *pRight) {
   return 0;
 }
 
-int32_t compareIntDoubleVal(const void *pLeft, const void *pRight) {
-  int64_t lhs = GET_INT64_VAL(pLeft);
-  double  rhs = GET_DOUBLE_VAL(pRight);
-  if (fabs(lhs - rhs) < FLT_EPSILON) {
-    return 0;
-  } else {
-    return (lhs > rhs) ? 1 : -1;
-  }
+int32_t compareUint32Val(const void *pLeft, const void *pRight) {
+  int32_t left = GET_UINT32_VAL(pLeft), right = GET_UINT32_VAL(pRight);
+  if (left > right) return 1;
+  if (left < right) return -1;
+  return 0;
 }
 
-int32_t compareDoubleIntVal(const void *pLeft, const void *pRight) {
-  double  lhs = GET_DOUBLE_VAL(pLeft);
-  int64_t rhs = GET_INT64_VAL(pRight);
-  if (fabs(lhs - rhs) < FLT_EPSILON) {
-    return 0;
-  } else {
-    return (lhs > rhs) ? 1 : -1;
-  }
+int32_t compareUint64Val(const void *pLeft, const void *pRight) {
+  int64_t left = GET_UINT64_VAL(pLeft), right = GET_UINT64_VAL(pRight);
+  if (left > right) return 1;
+  if (left < right) return -1;
+  return 0;
+}
+
+int32_t compareUint16Val(const void *pLeft, const void *pRight) {
+  int16_t left = GET_UINT16_VAL(pLeft), right = GET_UINT16_VAL(pRight);
+  if (left > right) return 1;
+  if (left < right) return -1;
+  return 0;
+}
+
+int32_t compareUint8Val(const void* pLeft, const void* pRight) {
+  uint8_t left = GET_UINT8_VAL(pLeft), right = GET_UINT8_VAL(pRight);
+  if (left > right) return 1;
+  if (left < right) return -1;
+  return 0;
 }
 
 int32_t compareFloatVal(const void *pLeft, const void *pRight) {
@@ -369,15 +377,24 @@ __compar_fn_t getKeyComparFunc(int32_t keyType) {
     case TSDB_DATA_TYPE_DOUBLE:
       comparFn = compareDoubleVal;
       break;
-    
+    case TSDB_DATA_TYPE_UTINYINT:
+      comparFn = compareUint8Val;
+      break;
+    case TSDB_DATA_TYPE_USMALLINT:
+      comparFn = compareUint16Val;
+      break;
+    case TSDB_DATA_TYPE_UINT:
+      comparFn = compareUint32Val;
+      break;
+    case TSDB_DATA_TYPE_UBIGINT:
+      comparFn = compareUint64Val;
+      break;
     case TSDB_DATA_TYPE_BINARY:
       comparFn = compareLenPrefixedStr;
       break;
-    
     case TSDB_DATA_TYPE_NCHAR:
       comparFn = compareLenPrefixedWStr;
       break;
-    
     default:
       comparFn = compareInt32Val;
       break;
diff --git a/src/util/src/tsocket.c b/src/util/src/tsocket.c
index 1a5c3bd64da3274773196da4a03c8c0613810f89..49b69ea0a13de346136b6196e4535afe3b7f337b 100644
--- a/src/util/src/tsocket.c
+++ b/src/util/src/tsocket.c
@@ -283,6 +283,7 @@ SOCKET taosOpenTcpClientSocket(uint32_t destIp, uint16_t destPort, uint32_t clie
   SOCKET  sockFd = 0;
   int32_t ret;
   struct sockaddr_in serverAddr, clientAddr;
+  int32_t bufSize = 1024 * 1024;
 
   sockFd = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
 
@@ -300,6 +301,18 @@ SOCKET taosOpenTcpClientSocket(uint32_t destIp, uint16_t destPort, uint32_t clie
     return -1;
   }
 
+  if (taosSetSockOpt(sockFd, SOL_SOCKET, SO_SNDBUF, (void *)&bufSize, sizeof(bufSize)) != 0) {
+    uError("failed to set the send buffer size for TCP socket\n");
+    taosCloseSocket(sockFd);
+    return -1;
+  }
+
+  if (taosSetSockOpt(sockFd, SOL_SOCKET, SO_RCVBUF, (void *)&bufSize, sizeof(bufSize)) != 0) {
+    uError("failed to set the receive buffer size for TCP socket\n");
+    taosCloseSocket(sockFd);
+    return -1;
+  }
+
   if (clientIp != 0) {
     memset((char *)&clientAddr, 0, sizeof(clientAddr));
     clientAddr.sin_family = AF_INET;
diff --git a/src/util/tests/CMakeLists.txt b/src/util/tests/CMakeLists.txt
index 0c96ed2a2f3dfb7f03268c9f8fbb1b0afa2397b9..6066d58416e8a5ad905e3b0706f03adc013fa445 100644
--- a/src/util/tests/CMakeLists.txt
+++ b/src/util/tests/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
+CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
 PROJECT(TDengine)
 
 FIND_PATH(HEADER_GTEST_INCLUDE_DIR gtest.h /usr/include/gtest /usr/local/include/gtest)
diff --git a/src/vnode/CMakeLists.txt b/src/vnode/CMakeLists.txt
index de0cdb028b5f9231f57c78fa3411714c93de85c7..c953883361ac80d6a962b3b35045792eae48dfae 100644
--- a/src/vnode/CMakeLists.txt
+++ b/src/vnode/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
+CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
 PROJECT(TDengine)
 
 INCLUDE_DIRECTORIES(${TD_COMMUNITY_DIR}/src/query/inc)
diff --git a/src/vnode/inc/vnodeInt.h b/src/vnode/inc/vnodeInt.h
index 7adeda590a509df9554c5dc83fa66758ed8ed9d2..3ec77bbc122341935a804448eca61258c634cf58 100644
--- a/src/vnode/inc/vnodeInt.h
+++ b/src/vnode/inc/vnodeInt.h
@@ -67,7 +67,7 @@ typedef struct {
   void *   qMgmt;
   char *   rootDir;
   tsem_t   sem;
-  char     db[TSDB_ACCT_LEN + TSDB_DB_NAME_LEN];
+  char     db[TSDB_ACCT_ID_LEN + TSDB_DB_NAME_LEN];
   pthread_mutex_t statusMutex;
 } SVnodeObj;
 
diff --git a/src/vnode/src/vnodeWrite.c b/src/vnode/src/vnodeWrite.c
index 4f6ce9d2e431d4998252741bf475d1549af0eb7a..4b9f59279cf1025e1f1fadaa30b4c5e2f9eea66f 100644
--- a/src/vnode/src/vnodeWrite.c
+++ b/src/vnode/src/vnodeWrite.c
@@ -52,7 +52,10 @@ int32_t vnodeProcessWrite(void *vparam, void *wparam, int32_t qtype, void *rpara
   int32_t    code = 0;
   SVnodeObj *pVnode = vparam;
   SWalHead * pHead = wparam;
-  SRspRet *  pRspRet = rparam;
+  SVWriteMsg*pWrite = rparam;
+
+  SRspRet *pRspRet = NULL;
+  if (pWrite != NULL) pRspRet = &pWrite->rspRet;
 
   if (vnodeProcessWriteMsgFp[pHead->msgType] == NULL) {
     vError("vgId:%d, msg:%s not processed since no handle, qtype:%s hver:%" PRIu64, pVnode->vgId,
@@ -85,7 +88,7 @@ int32_t vnodeProcessWrite(void *vparam, void *wparam, int32_t qtype, void *rpara
 
   // forward to peers, even it is WAL/FWD, it shall be called to update version in sync
   int32_t syncCode = 0;
-  syncCode = syncForwardToPeer(pVnode->sync, pHead, pRspRet, qtype);
+  syncCode = syncForwardToPeer(pVnode->sync, pHead, pWrite, qtype);
   if (syncCode < 0) return syncCode;
 
   // write into WAL
@@ -230,7 +233,7 @@ static SVWriteMsg *vnodeBuildVWriteMsg(SVnodeObj *pVnode, SWalHead *pHead, int32
     pWrite->rpcMsg = *pRpcMsg;
   }
 
-  memcpy(pWrite->pHead, pHead, sizeof(SWalHead) + pHead->len);
+  memcpy(&pWrite->pHead, pHead, sizeof(SWalHead) + pHead->len);
   pWrite->pVnode = pVnode;
   pWrite->qtype = qtype;
 
diff --git a/src/wal/CMakeLists.txt b/src/wal/CMakeLists.txt
index 359e09287a9409a7acffe27d934884cce0510bb0..681bed54258353b7ceff6df3c84909cbcadaa6b8 100644
--- a/src/wal/CMakeLists.txt
+++ b/src/wal/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
+CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
 PROJECT(TDengine)
 
 INCLUDE_DIRECTORIES(inc)
diff --git a/src/wal/test/CMakeLists.txt b/src/wal/test/CMakeLists.txt
index 6c232ce4b91eecf7e8818922bbdbebbfe380e444..b8338b1738a840d43d6f073e5562f0e1ffacf851 100644
--- a/src/wal/test/CMakeLists.txt
+++ b/src/wal/test/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
+CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
 PROJECT(TDengine)
 
 IF (TD_LINUX)
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index 4e7e9a87ea6810c362bd676cd9152f61bc08e29d..57fc8b1953d155c6ab45c8adc9e4146d00fb0b39 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -3,7 +3,7 @@
 # generate release version:
 # mkdir release; cd release; cmake -DCMAKE_BUILD_TYPE=Release ..
 
-CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
+CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
 PROJECT(TDengine)
 
 SET(CMAKE_C_STANDARD 11)
diff --git a/tests/comparisonTest/tdengine/CMakeLists.txt b/tests/comparisonTest/tdengine/CMakeLists.txt
index 990612b8c37a47fb9f4dc29e25f3e5c6840ff199..aaa18592ed29b6e39c97a55e68e4867684817bbf 100644
--- a/tests/comparisonTest/tdengine/CMakeLists.txt
+++ b/tests/comparisonTest/tdengine/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
+CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
 PROJECT(TDengine)
 
 IF (TD_LINUX)
diff --git a/tests/examples/C#/taosdemo/README.md b/tests/examples/C#/taosdemo/README.md
index 82a8dc674af9ecd83d6e777a0e2739cabf598536..2d125fb140076c46c9abc4c60db330b28b494802 100644
--- a/tests/examples/C#/taosdemo/README.md
+++ b/tests/examples/C#/taosdemo/README.md
@@ -10,30 +10,27 @@ run C# version taosdemo
 ===
 Usage: mono taosdemo.exe [OPTION...]
 
-        --help            Show usage.
+        --help                   Show usage.
 
-        -h                host, The host to connect to TDengine. Default is localhost.
-        -p                port, The TCP/IP port number to use for the connection. Default is 0.
-        -u                user, The user name to use when connecting to the server. Default is 'root'.
-        -P                password, The password to use when connecting to the server. Default is 'taosdata'.
-        -d                database, Destination database. Default is 'test'.
-        -a                replica, Set the replica parameters of the database, Default 1, min: 1, max: 5.
-        -m                table_prefix, Table prefix name. Default is 't'.
-        -s                sql file, The select sql file.
-        -M                stable, Use super table.
-        -o                outputfile, Direct output to the named file. Default is './output.txt'.
-        -q                query_mode, Query mode--0: SYNC, 1: ASYNC. Default is SYNC.
-        -b                type_of_cols, data_type of columns: 'INT', 'TINYINT', 'SMALLINT', 'BIGINT', 'FLOAT', 'DOUBLE', 'BINARY'. Default is 'INT'.
-        -w                length_of_binary, The length of data_type 'BINARY'. Only applicable when type of cols is 'BINARY'. Default is 8
-        -l                num_of_cols_per_record, The number of columns per record. Default is 3.
-        -T                num_of_threads, The number of threads. Default is 10.
-        -r                num_of_records_per_req, The number of records per request. Default is 1000.
-        -t                num_of_tables, The number of tables. Default is 1.
-        -n                num_of_records_per_table, The number of records per table. Default is 1.
-        -c                config_directory, Configuration directory. Default is '/etc/taos/'.
-        -x                flag, Insert only flag.
-        -O                order, Insert mode--0: In order, 1: Out of order. Default is in order.
-        -R                rate, Out of order data's rate--if order=1 Default 10, min: 0, max: 50.
-        -D                Delete data methods 0: don't delete, 1: delete by table, 2: delete by stable, 3: delete by database.
-        -v                Print verbose output
-        -y                Skip read key for continous test, default is not skip
+        -h <hostname>            host, The host to connect to TDengine. Default is localhost.
+        -p <port>                port, The TCP/IP port number to use for the connection. Default is 0.
+        -u <username>            user, The user name to use when connecting to the server. Default is 'root'.
+        -P <password>            password, The password to use when connecting to the server. Default is 'taosdata'.
+        -d <dbname>              database, Destination database. Default is 'test'.
+        -a <replications>        replica, Set the replica parameters of the database, Default 1, min: 1, max: 5.
+        -m <table prefix>        table_prefix, Table prefix name. Default is 't'.
+        -M                       stable, Use super table.
+        -s <stable prefix>       stable_prefix, STable prefix name. Default is 'st'
+        -Q <DEFAULT | command>   query, Execute query command. set 'DEFAULT' means select * from each table
+        -T <number>              num_of_threads, The number of threads. Default is 10.
+        -r <number>              num_of_records_per_req, The number of records per request. Default is 1000.
+        -t <number>              num_of_tables, The number of tables. Default is 1.
+        -n <number>              num_of_records_per_table, The number of records per table. Default is 1.
+        -c <path>                config_directory, Configuration directory. Default is '/etc/taos/'.
+        -x                       flag, Insert only flag.
+        -O                       order, Insert mode--0: In order, 1: Out of order. Default is in order.
+        -R <number>              rate, Out of order data's rate--if order=1 Default 10, min: 0, max: 50.
+        -D <number>              Delete data methods 0: don't delete, 1: delete by table, 2: delete by stable, 3: delete by database.
+        -v                       Print verbose output
+        -g                       Print debug output
+        -y                       Skip read key for continous test, default is not skip
diff --git a/tests/examples/C#/taosdemo/taosdemo.cs b/tests/examples/C#/taosdemo/taosdemo.cs
index 7e7c18db26c49c6c7a349fe497d6c9c792756a0c..df52acc99dcfeffacbc896d27b81efa66b45fa5f 100644
--- a/tests/examples/C#/taosdemo/taosdemo.cs
+++ b/tests/examples/C#/taosdemo/taosdemo.cs
@@ -34,11 +34,12 @@ namespace TDengineDriver
 
         //sql parameters
         private string dbName = "db";
-        private string stableName = "st";
+        private string stablePrefix = "st";
         private string tablePrefix = "t";
 
         private bool isInsertOnly = false;
-        private int queryMode = 1;
+        private string query = "NONE";
+        private short queryMode = 1;
 
         private long recordsPerTable = 1;
         private int recordsPerRequest = 1;
@@ -52,12 +53,19 @@ namespace TDengineDriver
         private bool useStable = false;
         private short methodOfDelete = 0;
         private long numOfThreads = 1;
-        private long rateOfOutorder = 0;
+        private short rateOfOutorder = 10;
         private bool order = true;
         private bool skipReadKey = false;
         private bool verbose = false;
+        private bool debug = false;
 
 
+        static void HelpPrint(string arg, string desc)
+        {
+            string indent = "        ";
+            Console.WriteLine("{0}{1}", indent, arg.PadRight(25)+desc);
+        }
+
         static void PrintHelp(String[] argv)
         {
             for (int i = 0; i < argv.Length; ++i)
@@ -66,59 +74,38 @@ namespace TDengineDriver
                 {
                     Console.WriteLine("Usage: mono taosdemo.exe [OPTION...]");
                     Console.WriteLine("");
-                    string indent = "        ";
-                    Console.WriteLine("{0}{1}", indent, "--help            Show usage.");
+                    HelpPrint("--help", "Show usage.");
                     Console.WriteLine("");
-                    Console.Write("{0}{1}", indent, "-h");
-                    Console.Write("{0}{1}{2}\n", indent, indent, "host, The host to connect to TDengine. Default is localhost.");
-                    Console.Write("{0}{1}", indent, "-p");
-                    Console.Write("{0}{1}{2}\n", indent, indent, "port, The TCP/IP port number to use for the connection. Default is 0.");
-                    Console.Write("{0}{1}", indent, "-u");
-                    Console.Write("{0}{1}{2}\n", indent, indent, "user, The user name to use when connecting to the server. Default is 'root'.");
-                    Console.Write("{0}{1}", indent, "-P");
-                    Console.Write("{0}{1}{2}\n", indent, indent, "password, The password to use when connecting to the server. Default is 'taosdata'.");
-                    Console.Write("{0}{1}", indent, "-d");
-                    Console.Write("{0}{1}{2}\n", indent, indent, "database, Destination database. Default is 'test'.");
-                    Console.Write("{0}{1}", indent, "-a");
-                    Console.Write("{0}{1}{2}\n", indent, indent, "replica, Set the replica parameters of the database, Default 1, min: 1, max: 5.");
-                    Console.Write("{0}{1}", indent, "-m");
-                    Console.Write("{0}{1}{2}\n", indent, indent, "table_prefix, Table prefix name. Default is 't'.");
-                    Console.Write("{0}{1}", indent, "-s");
-                    Console.Write("{0}{1}{2}\n", indent, indent, "sql file, The select sql file.");
-                    Console.Write("{0}{1}", indent, "-M");
-                    Console.Write("{0}{1}{2}\n", indent, indent, "stable, Use super table.");
-                    Console.Write("{0}{1}", indent, "-o");
-                    Console.Write("{0}{1}{2}\n", indent, indent, "outputfile, Direct output to the named file. Default is './output.txt'.");
-                    Console.Write("{0}{1}", indent, "-q");
-                    Console.Write("{0}{1}{2}\n", indent, indent, "query_mode, Query mode--0: SYNC, 1: ASYNC. Default is SYNC.");
-                    Console.Write("{0}{1}", indent, "-b");
-                    Console.Write("{0}{1}{2}\n", indent, indent, "type_of_cols, data_type of columns: 'INT', 'TINYINT', 'SMALLINT', 'BIGINT', 'FLOAT', 'DOUBLE', 'BINARY'. Default is 'INT'.");
-                    Console.Write("{0}{1}", indent, "-w");
-                    Console.Write("{0}{1}{2}\n", indent, indent, "length_of_binary, The length of data_type 'BINARY'. Only applicable when type of cols is 'BINARY'. Default is 8");
-                    Console.Write("{0}{1}", indent, "-l");
-                    Console.Write("{0}{1}{2}\n", indent, indent, "num_of_cols_per_record, The number of columns per record. Default is 3.");
-                    Console.Write("{0}{1}", indent, "-T");
-                    Console.Write("{0}{1}{2}\n", indent, indent, "num_of_threads, The number of threads. Default is 10.");
-                    Console.Write("{0}{1}", indent, "-r");
-                    Console.Write("{0}{1}{2}\n", indent, indent, "num_of_records_per_req, The number of records per request. Default is 1000.");
-                    Console.Write("{0}{1}", indent, "-t");
-                    Console.Write("{0}{1}{2}\n", indent, indent, "num_of_tables, The number of tables. Default is 1.");
-                    Console.Write("{0}{1}", indent, "-n");
-                    Console.Write("{0}{1}{2}\n", indent, indent, "num_of_records_per_table, The number of records per table. Default is 1.");
-                    Console.Write("{0}{1}", indent, "-c");
-                    Console.Write("{0}{1}{2}\n", indent, indent, "config_directory, Configuration directory. Default is '/etc/taos/'.");
-                    Console.Write("{0}{1}", indent, "-x");
-                    Console.Write("{0}{1}{2}\n", indent, indent, "flag, Insert only flag.");
-                    Console.Write("{0}{1}", indent, "-O");
-                    Console.Write("{0}{1}{2}\n", indent, indent, "order, Insert mode--0: In order, 1: Out of order. Default is in order.");
-                    Console.Write("{0}{1}", indent, "-R");
-                    Console.Write("{0}{1}{2}\n", indent, indent, "rate, Out of order data's rate--if order=1 Default 10, min: 0, max: 50.");
-                    Console.Write("{0}{1}", indent, "-D");
-                    Console.Write("{0}{1}{2}\n", indent, indent, "Delete data methods 0: don't delete, 1: delete by table, 2: delete by stable, 3: delete by database.");
-                    Console.Write("{0}{1}", indent, "-v");
-                    Console.Write("{0}{1}{2}\n", indent, indent, "Print verbose output");
-                    Console.Write("{0}{1}", indent, "-y");
-                    Console.Write("{0}{1}{2}\n", indent, indent, "Skip read key for continous test, default is not skip");
+
+                    HelpPrint("-h <hostname>", "host, The host to connect to TDengine. Default is localhost.");
+                    HelpPrint("-p <port>", "port, The TCP/IP port number to use for the connection. Default is 0.");
+                    HelpPrint("-u <username>", "user, The user name to use when connecting to the server. Default is 'root'.");
+                    HelpPrint("-P <password>", "password, The password to use when connecting to the server. Default is 'taosdata'.");
+                    HelpPrint("-d <dbname>", "database, Destination database. Default is 'test'.");
+                    HelpPrint("-a <replications>", "replica, Set the replica parameters of the database, Default 1, min: 1, max: 5.");
+                    HelpPrint("-m <table prefix>", "table_prefix, Table prefix name. Default is 't'.");
+                    HelpPrint("-M", "stable, Use super table.");
+                    HelpPrint("-s <stable prefix>", "stable_prefix, STable prefix name. Default is 'st'");
+                    HelpPrint("-Q <DEFAULT | command>", "query, Execute query command. set 'DEFAULT' means select * from each table");
+                    /* NOT SUPPORT SO FAR
+                    HelpPrint("-o", "outputfile, Direct output to the named file. Default is './output.txt'.");
+                    HelpPrint("-q", "query_mode, Query mode--0: SYNC, 1: ASYNC. Default is SYNC.");
+                    HelpPrint("-b", "type_of_cols, data_type of columns: 'INT', 'TINYINT', 'SMALLINT', 'BIGINT', 'FLOAT', 'DOUBLE', 'BINARY'. Default is 'INT'.");
+                    HelpPrint("-w", "length_of_binary, The length of data_type 'BINARY'. Only applicable when type of cols is 'BINARY'. Default is 8");
+                    HelpPrint("-l", "num_of_cols_per_record, The number of columns per record. Default is 3.");
+                    */
+                    HelpPrint("-T <number>", "num_of_threads, The number of threads. Default is 10.");
+                    HelpPrint("-r <number>", "num_of_records_per_req, The number of records per request. Default is 1000.");
+                    HelpPrint("-t <number>", "num_of_tables, The number of tables. Default is 1.");
+                    HelpPrint("-n <number>", "num_of_records_per_table, The number of records per table. Default is 1.");
+                    HelpPrint("-c <path>", "config_directory, Configuration directory. Default is '/etc/taos/'.");
+                    HelpPrint("-x", "flag, Insert only flag.");
+                    HelpPrint("-O", "order, Insert mode--0: In order, 1: Out of order. Default is in order.");
+                    HelpPrint("-R <number>", "rate, Out of order data's rate--if order=1 Default 10, min: 0, max: 50.");
+                    HelpPrint("-D <number>", "Delete data methods 0: don't delete, 1: delete by table, 2: delete by stable, 3: delete by database.");
+                    HelpPrint("-v", "Print verbose output");
+                    HelpPrint("-g", "Print debug output");
+                    HelpPrint("-y", "Skip read key for continous test, default is not skip");
 
                     System.Environment.Exit(0);
                 }
@@ -132,49 +119,56 @@ namespace TDengineDriver
             user = this.GetArgumentAsString(argv, "-u", "root");
             password = this.GetArgumentAsString(argv, "-P", "taosdata");
             dbName = this.GetArgumentAsString(argv, "-d", "db");
-            stableName = this.GetArgumentAsString(argv, "-s", "st");
+            stablePrefix = this.GetArgumentAsString(argv, "-s", "st");
             tablePrefix = this.GetArgumentAsString(argv, "-m", "t");
-            isInsertOnly = this.GetArgumentAsFlag(argv, "-x");
-            queryMode = (int)this.GetArgumentAsLong(argv, "-q", 0, 1, 0);
+            isInsertOnly = this.GetArgumentAsFlag(argv, "-x", true);
+            query = this.GetArgumentAsString(argv, "-Q", "NONE");
+            queryMode = (short)this.GetArgumentAsLong(argv, "-q", 0, 1, 0);
             numOfTables = this.GetArgumentAsLong(argv, "-t", 1, 1000000000, 1);
             batchRows = this.GetArgumentAsLong(argv, "-r", 1, 10000, 1000);
             recordsPerTable = this.GetArgumentAsLong(argv, "-n", 1, 100000000000, 1);
             recordsPerRequest = (int)this.GetArgumentAsLong(argv, "-r", 1, 10000, 1);
             colsPerRecord = (int)this.GetArgumentAsLong(argv, "-l", 1, 1024, 3);
             configDir = this.GetArgumentAsString(argv, "-c", "C:/TDengine/cfg");
-            useStable = this.GetArgumentAsFlag(argv, "-M");
+            useStable = this.GetArgumentAsFlag(argv, "-M", true);
 
             replica = (short)this.GetArgumentAsLong(argv, "-a", 1, 5, 1);
             methodOfDelete = (short)this.GetArgumentAsLong(argv, "-D", 0, 3, 0);
             numOfThreads = (short)this.GetArgumentAsLong(argv, "-T", 1, 10000, 1);
-            order = this.GetArgumentAsFlag(argv, "-O");
-            rateOfOutorder = this.GetArgumentAsLong(argv, "-R", 0, 100, 0);
-
-            skipReadKey = this.GetArgumentAsFlag(argv, "-y");
-            verbose = this.GetArgumentAsFlag(argv, "-v");
-
-            Console.Write("###################################################################\n");
-            Console.Write("# Server IP:                         {0}\n", host);
-            Console.Write("# User:                              {0}\n", user);
-            Console.Write("# Password:                          {0}\n", password);
-            Console.Write("# Number of Columns per record:      {0}\n", colsPerRecord);
-            Console.Write("# Number of Threads:                 {0}\n", numOfThreads);
-            Console.Write("# Number of Tables:                  {0}\n", numOfTables);
-            Console.Write("# Number of Data per Table:          {0}\n", recordsPerTable);
-            Console.Write("# Records/Request:                   {0}\n", recordsPerRequest);
-            Console.Write("# Database name:                     {0}\n", dbName);
-            Console.Write("# Replica:                           {0}\n", replica);
-            Console.Write("# Use STable:                        {0}\n", useStable);
-            Console.Write("# Table prefix:                      {0}\n", tablePrefix);
-            Console.Write("# Data order:                        {0}\n", order);
-            Console.Write("# Data out of order rate:            {0}\n", rateOfOutorder);
-            Console.Write("# Delete method:                     {0}\n", methodOfDelete);
-            Console.Write("# Query Mode:                        {0}\n", queryMode);
-            Console.Write("# Insert Only:                       {0}\n", isInsertOnly);
-            Console.Write("# Verbose output                     {0}\n", verbose);
-            Console.Write("# Test time:                         {0}\n", DateTime.Now.ToString("h:mm:ss tt"));
-
-            Console.Write("###################################################################\n");
+            order = this.GetArgumentAsFlag(argv, "-O", false);
+            rateOfOutorder = (short)this.GetArgumentAsLong(argv, "-R", 0, 50, 10);
+
+            skipReadKey = this.GetArgumentAsFlag(argv, "-y", true);
+            verbose = this.GetArgumentAsFlag(argv, "-v", true);
+            debug = this.GetArgumentAsFlag(argv, "-g", true);
+
+            VerbosePrint        ("###################################################################\n");
+            VerbosePrintFormat  ("# Server IP:                         {0}\n", host);
+            VerbosePrintFormat  ("# User:                              {0}\n", user);
+            VerbosePrintFormat  ("# Password:                          {0}\n", password);
+            VerbosePrintFormat  ("# Number of Columns per record:      {0}\n", colsPerRecord);
+            VerbosePrintFormat  ("# Number of Threads:                 {0}\n", numOfThreads);
+            VerbosePrintFormat  ("# Number of Tables:                  {0}\n", numOfTables);
+            VerbosePrintFormat  ("# Number of records per Table:       {0}\n", recordsPerTable);
+            VerbosePrintFormat  ("# Records/Request:                   {0}\n", recordsPerRequest);
+            VerbosePrintFormat  ("# Database name:                     {0}\n", dbName);
+            VerbosePrintFormat  ("# Replica:                           {0}\n", replica);
+            VerbosePrintFormat  ("# Use STable:                        {0}\n", useStable);
+            VerbosePrintFormat  ("# Table prefix:                      {0}\n", tablePrefix);
+            if (useStable == true)
+            {
+                VerbosePrintFormat("# STable prefix:                     {0}\n", stablePrefix);
+            }
+            VerbosePrintFormat  ("# Data order:                        {0}\n", order);
+            VerbosePrintFormat  ("# Data out of order rate:            {0}\n", rateOfOutorder);
+            VerbosePrintFormat  ("# Delete method:                     {0}\n", methodOfDelete);
+            VerbosePrintFormat  ("# Query command:                     {0}\n", query);
+            VerbosePrintFormat  ("# Query Mode:                        {0}\n", queryMode);
+            VerbosePrintFormat  ("# Insert Only:                       {0}\n", isInsertOnly);
+            VerbosePrintFormat  ("# Verbose output                     {0}\n", verbose);
+            VerbosePrintFormat  ("# Test time:                         {0}\n", DateTime.Now.ToString("h:mm:ss tt"));
+
+            VerbosePrint        ("###################################################################\n");
 
             if (skipReadKey == false)
             {
@@ -183,17 +177,17 @@ namespace TDengineDriver
             }
         }
 
-        public bool GetArgumentAsFlag(String[] argv, String argName)
+        public bool GetArgumentAsFlag(String[] argv, String argName, bool defaultValue)
         {
             int argc = argv.Length;
             for (int i = 0; i < argc; ++i)
             {
                 if (argName == argv[i])
                 {
-                    return true;
+                    return defaultValue;
                 }
             }
-            return false;
+            return !defaultValue;
         }
 
         public long GetArgumentAsLong(String[] argv, String argName, int minVal, long maxVal, int defaultValue)
@@ -210,15 +204,15 @@ namespace TDengineDriver
                     String tmp = argv[i + 1];
                     if (tmp[0] == '-')
                     {
-                        Console.WriteLine("option {0:G} requires an argument", tmp);
-                        ExitProgram();
+                        Console.WriteLine("option {0:G} requires an argument", argName);
+                        ExitProgram(1);
                     }
 
                     long tmpVal = Convert.ToInt64(tmp);
                     if (tmpVal < minVal || tmpVal > maxVal)
                     {
-                        Console.WriteLine("option {0:G} should in range [{1:G}, {2:G}]", argName, minVal, maxVal);
-                        ExitProgram();
+                        Console.WriteLine("option {0:G} value should in range [{1:G}, {2:G}]", argName, minVal, maxVal);
+                        ExitProgram(1);
                     }
 
                     return tmpVal;
@@ -242,8 +236,8 @@ namespace TDengineDriver
                     String tmp = argv[i + 1];
                     if (tmp[0] == '-')
                     {
-                        Console.WriteLine("option {0:G} requires an argument", tmp);
-                        ExitProgram();
+                        Console.WriteLine("option {0:G} requires an argument", argName);
+                        ExitProgram(1);
                     }
                     return tmp;
                 }
@@ -252,13 +246,18 @@ namespace TDengineDriver
             return defaultValue;
         }
 
-        static void ExitProgram()
+        static void CleanAndExitProgram(int ret)
         {
             TDengine.Cleanup();
-            System.Environment.Exit(0);
+            System.Environment.Exit(ret);
         }
 
-        private void DebugPrintFormat(string format, params object[] parameters)
+        static void ExitProgram(int ret)
+        {
+            System.Environment.Exit(ret);
+        }
+
+        private void VerbosePrintFormat(string format, params object[] parameters)
         {
             if (verbose == true)
             {
@@ -266,7 +265,7 @@ namespace TDengineDriver
             }
         }
 
-        private void DebugPrint(string str)
+        private void VerbosePrint(string str)
         {
             if (verbose == true)
             {
@@ -274,28 +273,44 @@ namespace TDengineDriver
             }
         }
 
+        private void DebugPrintFormat(string format, params object[] parameters)
+        {
+            if (debug == true)
+            {
+                Console.Write(format, parameters);
+            }
+        }
+
+        private void DebugPrint(string str)
+        {
+            if (debug == true)
+            {
+                Console.Write(str);
+            }
+        }
+
         public void InitTDengine()
         {
             TDengine.Options((int)TDengineInitOption.TDDB_OPTION_CONFIGDIR, this.configDir);
             TDengine.Options((int)TDengineInitOption.TDDB_OPTION_SHELL_ACTIVITY_TIMER, "60");
             TDengine.Init();
-            DebugPrint("TDengine Initialization finished\n");
+            VerbosePrint("TDengine Initialization finished\n");
         }
 
         public void ConnectTDengine()
         {
             string db = "";
-            DebugPrintFormat("host:{0} user:{1}, pass:{2}; db:{3}, port:{4}\n",
+            VerbosePrintFormat("host:{0} user:{1}, pass:{2}; db:{3}, port:{4}\n",
                     this.host, this.user, this.password, db, this.port);
             this.conn = TDengine.Connect(this.host, this.user, this.password, db, this.port);
             if (this.conn == IntPtr.Zero)
             {
                 Console.WriteLine("Connect to TDengine failed");
-                ExitProgram();
+                CleanAndExitProgram(1);
             }
             else
             {
-                DebugPrint("Connect to TDengine success\n");
+                VerbosePrint("Connect to TDengine success\n");
             }
         }
 
@@ -323,12 +338,13 @@ namespace TDengineDriver
                 CreateTableThread createTableThread = new CreateTableThread();
                 createTableThread.id = i;
                 createTableThread.verbose = verbose;
+                createTableThread.debug = debug;
                 createTableThread.dbName = this.dbName;
                 createTableThread.tablePrefix = this.tablePrefix;
                 createTableThread.useStable = useStable;
                 if (useStable)
                 {
-                    createTableThread.stableName = stableName;
+                    createTableThread.stablePrefix = stablePrefix;
                 }
                 createTableThread.conn = conn;
 
@@ -356,12 +372,12 @@ namespace TDengineDriver
             IntPtr res = TDengine.Query(this.conn, sql.ToString());
             if (res != IntPtr.Zero)
             {
-                DebugPrint(sql.ToString() + " success\n");
+                VerbosePrint(sql.ToString() + " success\n");
             }
             else
             {
                 Console.WriteLine(sql.ToString() + " failure, reason: " + TDengine.Error(res));
-                ExitProgram();
+                CleanAndExitProgram(1);
             }
 
         }
@@ -373,12 +389,12 @@ namespace TDengineDriver
             IntPtr res = TDengine.Query(this.conn, sql.ToString());
             if (res != IntPtr.Zero)
             {
-                DebugPrint(sql.ToString() + " success\n");
+                VerbosePrint(sql.ToString() + " success\n");
             }
             else
             {
                 Console.WriteLine(sql.ToString() + " failure, reason: " + TDengine.Error(res));
-                ExitProgram();
+                CleanAndExitProgram(1);
             }
             TDengine.FreeResult(res);
         }
@@ -389,17 +405,17 @@ namespace TDengineDriver
 
             sql.Clear();
             sql.Append("CREATE TABLE IF NOT EXISTS ").
-                Append(this.dbName).Append(".").Append(this.stableName).
+                Append(this.dbName).Append(".").Append(this.stablePrefix).
                 Append("(ts timestamp, v1 bool, v2 tinyint, v3 smallint, v4 int, v5 bigint, v6 float, v7 double, v8 binary(10), v9 nchar(10)) tags(t1 int)");
             IntPtr res = TDengine.Query(this.conn, sql.ToString());
             if (res != IntPtr.Zero)
             {
-                DebugPrint(sql.ToString() + " success\n");
+                VerbosePrint(sql.ToString() + " success\n");
             }
             else
             {
                 Console.WriteLine(sql.ToString() + " failure, reason: " + TDengine.Error(res));
-                ExitProgram();
+                CleanAndExitProgram(1);
             }
             TDengine.FreeResult(res);
         }
@@ -431,11 +447,14 @@ namespace TDengineDriver
                 insertThread.batchRows = batchRows;
                 insertThread.numOfTables = numOfTables;
                 insertThread.verbose = verbose;
+                insertThread.debug = debug;
                 insertThread.dbName = this.dbName;
                 insertThread.tablePrefix = this.tablePrefix;
+                insertThread.order = this.order;
+                insertThread.rateOfOutorder = this.rateOfOutorder;
                 if (useStable)
                 {
-                    //                    insertThread.stableName = stableName;
+                    insertThread.stablePrefix = stablePrefix;
                 }
                 insertThread.conn = conn;
 
@@ -458,33 +477,43 @@ namespace TDengineDriver
 
         public void ExecuteQuery()
         {
-            //            System.DateTime start = new System.DateTime();
             long queryRows = 0;
 
-            for (int i = 0; i < 1/*this.numOfTables*/; ++i)
+            for (int i = 0; i < this.numOfTables; ++i)
             {
-                String sql = "select * from " + this.dbName + "." + tablePrefix + i;
-                //                Console.WriteLine(sql);
+                string sql;
+
+                if (query == "DEFAULT")
+                {
+                    sql = "select * from " + this.dbName + "." + tablePrefix + i;
+                }
+                else
+                {
+                    sql = query;
+                }
+                DebugPrintFormat("query: {0}, sql:{1}\n", query, sql);
 
                 IntPtr res = TDengine.Query(conn, sql);
+                DebugPrintFormat("res: {0}\n", res);
                 if (res == IntPtr.Zero)
                 {
                     Console.WriteLine(sql + " failure, reason: " + TDengine.Error(res));
-                    ExitProgram();
+                    CleanAndExitProgram(1);
                 }
 
                 int fieldCount = TDengine.FieldCount(res);
-                //                Console.WriteLine("field count: " + fieldCount);
+                DebugPrint("field count: " + fieldCount + "\n");
 
                 List<TDengineMeta> metas = TDengine.FetchFields(res);
                 for (int j = 0; j < metas.Count; j++)
                 {
                     TDengineMeta meta = (TDengineMeta)metas[j];
-                    //                    Console.WriteLine("index:" + j + ", type:" + meta.type + ", typename:" + meta.TypeName() + ", name:" + meta.name + ", size:" + meta.size);
+                    DebugPrint("index:" + j + ", type:" + meta.type + ", typename:" + meta.TypeName() + ", name:" + meta.name + ", size:" + meta.size + "\n");
                 }
 
                 IntPtr rowdata;
                 StringBuilder builder = new StringBuilder();
+
                 while ((rowdata = TDengine.FetchRows(res)) != IntPtr.Zero)
                 {
                     queryRows++;
@@ -548,10 +577,7 @@ namespace TDengineDriver
                     }
                     builder.Append("---");
 
-                    if (queryRows <= 10)
-                    {
-                        Console.WriteLine(builder.ToString());
-                    }
+                    VerbosePrint(builder.ToString() + "\n");
                     builder.Clear();
                 }
 
@@ -563,13 +589,6 @@ namespace TDengineDriver
 
                 TDengine.FreeResult(res);
             }
-            /*
-                        System.DateTime end = new System.DateTime();
-                        TimeSpan ts = end - start;
-
-                        Console.Write("Total {0:G} rows inserted, {1:G} rows query, time spend {2:G} seconds.\n"
-                         , this.rowsInserted, queryRows, ts.TotalSeconds);
-                         */
         }
 
         public void CloseConnection()
@@ -610,13 +629,24 @@ namespace TDengineDriver
             watch.Stop();
             double elapsedMs = watch.Elapsed.TotalMilliseconds;
 
-            Console.WriteLine("Spent {0} seconds to insert {1} records with {2} record(s) per request: {3} records/second",
+            Console.WriteLine("C# taosdemo: Spent {0} seconds to insert {1} records with {2} record(s) per request: {3} records/second",
                     elapsedMs / 1000,
                 tester.recordsPerTable * tester.numOfTables,
                 tester.batchRows,
                 (tester.recordsPerTable * tester.numOfTables * 1000) / elapsedMs);
 
-            tester.ExecuteQuery();
+            tester.DebugPrintFormat("query command:{0}\n", tester.query);
+            if (tester.query != "NONE")
+            {
+                watch = Stopwatch.StartNew();
+                tester.ExecuteQuery();
+                watch.Stop();
+                elapsedMs = watch.Elapsed.TotalMilliseconds;
+                Console.WriteLine("C# taosdemo: Spent {0} seconds to query {1} records.\n", 
+                        elapsedMs/1000,
+                        tester.recordsPerTable * tester.numOfTables
+                        );
+            }
             tester.CloseConnection();
 
             Console.WriteLine("End.");
@@ -630,13 +660,16 @@ namespace TDengineDriver
             public string dbName { set; get; }
             public IntPtr conn { set; get; }
             public string tablePrefix { set; get; }
-            //            public string stableName { set; get; }
+            public string stablePrefix { set; get; }
             public long recordsPerTable { set; get; }
             public long batchRows { set; get; }
             public long numOfTables { set; get; }
             public bool verbose { set; get; }
+            public bool debug { set; get; }
+            public bool order { set; get; }
+            public short rateOfOutorder { set; get; }
 
-            private void DebugPrintFormat(string format, params object[] parameters)
+            private void VerbosePrintFormat(string format, params object[] parameters)
             {
                 if (verbose == true)
                 {
@@ -644,7 +677,7 @@ namespace TDengineDriver
                 }
             }
 
-            private void DebugPrint(string str)
+            private void VerbosePrint(string str)
             {
                 if (verbose == true)
                 {
@@ -652,9 +685,25 @@ namespace TDengineDriver
                 }
             }
 
+            private void DebugPrintFormat(string format, params object[] parameters)
+            {
+                if (debug == true)
+                {
+                    Console.Write(format, parameters);
+                }
+            }
+
+            private void DebugPrint(string str)
+            {
+                if (debug == true)
+                {
+                    Console.Write(str);
+                }
+            }
+
             public void ThreadMain()
             {
-                DebugPrintFormat("InsertDataThread {0} from {1} to {2}\n", id, start, end);
+                VerbosePrintFormat("InsertDataThread {0} from {1} to {2}\n", id, start, end);
                 StringBuilder sql = new StringBuilder();
 
                 DateTime now = DateTime.Now;
@@ -663,12 +712,12 @@ namespace TDengineDriver
                 int s = now.Second;
 
                 long baseTimestamp = 1609430400000;    // 2021/01/01 0:0:0
-                DebugPrintFormat("beginTime is {0} + {1}h:{2}m:{3}s\n", baseTimestamp, h, m, s);
+                VerbosePrintFormat("beginTime is {0} + {1}h:{2}m:{3}s\n", baseTimestamp, h, m, s);
                 long beginTimestamp = baseTimestamp + ((h*60 + m) * 60 + s) * 1000;
+                Random random = new Random();
 
                 long rowsInserted = 0;
 
-                //                System.DateTime startTime = new System.DateTime();
                 long i = 0;
                 while (i < recordsPerTable)
                 {
@@ -686,8 +735,25 @@ namespace TDengineDriver
                         }
                         for (int batch = 0; batch < batchRows; ++batch)
                         {
+                            long writeTimeStamp = beginTimestamp + i + batch;
+                            int rnd = 100;
+                            if (this.order == false)
+                            {
+                                rnd = random.Next(1, 100);
+                                if (rnd <= this.rateOfOutorder)
+                                {
+                                    writeTimeStamp = writeTimeStamp + rnd * 10000;
+                                    DebugPrint("### ");
+                                }
+                                DebugPrintFormat("order:{0} rnd:{1} timestamp:{2}\n", this.order, rnd, writeTimeStamp);
+                            }
+                            else
+                            {
+                                DebugPrintFormat("order:{0} timestamp:{1}\n", this.order, writeTimeStamp);
+                            }
+
                             sql.Append("(")
-                                .Append(beginTimestamp + i + batch)
+                                .Append(writeTimeStamp)
                                 .Append(", 1, 2, 3,")
                                 .Append(i + batch)
                                 .Append(", 5, 6, 7, 'abc', 'def')");
@@ -696,7 +762,7 @@ namespace TDengineDriver
                         IntPtr res = TDengine.Query(this.conn, sql.ToString());
                         if (res == IntPtr.Zero)
                         {
-                            DebugPrint(sql.ToString() + " failure, reason: " + TDengine.Error(res) + "\n");
+                            VerbosePrint(sql.ToString() + " failure, reason: " + TDengine.Error(res) + "\n");
                         }
 
                         inserted += this.batchRows;
@@ -723,11 +789,12 @@ namespace TDengineDriver
             public string dbName { set; get; }
             public IntPtr conn { set; get; }
             public string tablePrefix { set; get; }
-            public string stableName { set; get; }
+            public string stablePrefix { set; get; }
             public bool verbose { set; get; }
+            public bool debug { set; get; }
             public bool useStable { set; get; }
 
-            private void DebugPrintFormat(string format, params object[] parameters)
+            private void VerbosePrintFormat(string format, params object[] parameters)
             {
                 if (verbose == true)
                 {
@@ -735,7 +802,7 @@ namespace TDengineDriver
                 }
             }
 
-            private void DebugPrint(string str)
+            private void VerbosePrint(string str)
             {
                 if (verbose == true)
                 {
@@ -743,9 +810,17 @@ namespace TDengineDriver
                 }
             }
 
+            private void DebugPrintFormat(string format, params object[] parameters)
+            {
+                if (debug == true)
+                {
+                    Console.Write(format, parameters);
+                }
+            }
+
             public void ThreadMain()
             {
-                DebugPrintFormat("CreateTable {0} from {1} to {2}\n", id, start, end);
+                VerbosePrintFormat("CreateTable {0} from {1} to {2}\n", id, start, end);
 
                 StringBuilder sql = new StringBuilder();
 
@@ -756,7 +831,7 @@ namespace TDengineDriver
                         Append(this.dbName).Append(".").Append(this.tablePrefix).Append(tableId);
                     if (useStable == true)
                     {
-                        sql = sql.Append(" USING ").Append(this.dbName).Append(".").Append(this.stableName).
+                        sql = sql.Append(" USING ").Append(this.dbName).Append(".").Append(this.stablePrefix).
                             Append(" TAGS(").Append(tableId).Append(")");
                     }
                     else
@@ -766,12 +841,12 @@ namespace TDengineDriver
                     IntPtr res = TDengine.Query(this.conn, sql.ToString());
                     if (res != IntPtr.Zero)
                     {
-                        DebugPrint(sql.ToString() + " success\n");
+                        VerbosePrint(sql.ToString() + " success\n");
                     }
                     else
                     {
-                        DebugPrint(sql.ToString() + " failure, reason: " + TDengine.Error(res) + "\n");
-                        ExitProgram();
+                        VerbosePrint(sql.ToString() + " failure, reason: " + TDengine.Error(res) + "\n");
+                        CleanAndExitProgram(1);
                     }
                     TDengine.FreeResult(res);
                 }
diff --git a/tests/pytest/alter/alter_table.py b/tests/pytest/alter/alter_table.py
index f1d1da29900b4d703ef6a011a46650a2e05c2f9d..2982492f6567ad54a62a3fcca44d4f1ac9560697 100644
--- a/tests/pytest/alter/alter_table.py
+++ b/tests/pytest/alter/alter_table.py
@@ -131,7 +131,7 @@ class TDTestCase:
         tdSql.execute("alter table t0 set tag t1=2.1")
 
         tdSql.query("show tables")
-        tdSql.checkRows(1)
+        tdSql.checkRows(2)
         
     def stop(self):
         tdSql.close()
diff --git a/tests/pytest/client/alterDatabase.py b/tests/pytest/client/alterDatabase.py
index 8191312cc060f9c20632911c956065f777d47079..bc8c4fc17ee956ad21525adb0587f925bb35d2bf 100644
--- a/tests/pytest/client/alterDatabase.py
+++ b/tests/pytest/client/alterDatabase.py
@@ -35,10 +35,9 @@ class TDTestCase:
         tdSql.execute("alter database db keep 365,365,365")
         tdSql.query("show databases")
         tdSql.checkData(0, 7, "365,365,365")
-
-        tdSql.execute("alter database db quorum 2")
-        tdSql.query("show databases")
-        tdSql.checkData(0, 5, 2)
+        
+        tdSql.error("alter database db quorum 2")
+        
 
         tdSql.execute("alter database db blocks 100")
         tdSql.query("show databases")
diff --git a/tests/pytest/fulltest.sh b/tests/pytest/fulltest.sh
index cb233f85b8132910b316fd130983769e99452bf9..d9bc185b6c326b79d933dafc50cd7db0e0d396f4 100755
--- a/tests/pytest/fulltest.sh
+++ b/tests/pytest/fulltest.sh
@@ -190,6 +190,7 @@ python3 ./test.py -f stream/table_n.py
 
 #alter table
 python3 ./test.py -f alter/alter_table_crash.py
+python3 ./test.py -f alter/alter_table.py
 
 # client
 python3 ./test.py -f client/client.py
diff --git a/tests/pytest/multilevel/basic.py b/tests/pytest/multilevel/basic.py
new file mode 100644
index 0000000000000000000000000000000000000000..95549409c9f1a1b287fc872260d33f956ccf3510
--- /dev/null
+++ b/tests/pytest/multilevel/basic.py
@@ -0,0 +1,51 @@
+###################################################################
+#       Copyright (c) 2016 by TAOS Technologies, Inc.
+#             All rights reserved.
+#
+#  This file is proprietary and confidential to TAOS Technologies.
+#  No part of this file may be reproduced, stored, transmitted,
+#  disclosed or used in any form or by any means other than as
+#  expressly provided by the written permission from Jianhui Tao
+#
+###################################################################
+
+# -*- coding: utf-8 -*-
+
+import sys
+import taos
+from util.log import *
+from util.cases import *
+from util.sql import *
+from util.dnodes import *
+
+
+class TDTestCase:
+    def init(self, conn, logSql):
+        tdLog.debug("start to execute %s" % __file__)
+        tdSql.init(conn.cursor(), logSql)
+
+    def run(self):
+        cfg={
+            '/mnt/data1' : 'dataDir',
+            '/mnt/data2 0 0' : 'dataDir'
+        }
+        tdSql.createDir('/mnt/data1')
+        tdSql.createDir('/mnt/data2')
+
+        tdLog.info("================= step1")
+        tdDnodes.stop(1)
+        tdDnodes.deploy(1,cfg)
+        tdDnodes.startWithoutSleep(1)
+        
+        tdLog.info("================= step2")
+        tdSql.haveFile('/mnt/data1',1)
+        tdSql.haveFile('/mnt/data2',1)
+        
+
+    def stop(self):
+        tdSql.close()
+        tdLog.success("%s successfully executed" % __file__)
+
+
+tdCases.addWindows(__file__, TDTestCase())
+tdCases.addLinux(__file__, TDTestCase())
diff --git a/tests/pytest/multilevel/dirNotExist.py b/tests/pytest/multilevel/dirNotExist.py
new file mode 100644
index 0000000000000000000000000000000000000000..e895ac31ad1d6361cddfe867e39cea370412cb58
--- /dev/null
+++ b/tests/pytest/multilevel/dirNotExist.py
@@ -0,0 +1,50 @@
+###################################################################
+#       Copyright (c) 2016 by TAOS Technologies, Inc.
+#             All rights reserved.
+#
+#  This file is proprietary and confidential to TAOS Technologies.
+#  No part of this file may be reproduced, stored, transmitted,
+#  disclosed or used in any form or by any means other than as
+#  expressly provided by the written permission from Jianhui Tao
+#
+###################################################################
+
+# -*- coding: utf-8 -*-
+
+import sys
+import taos
+from util.log import *
+from util.cases import *
+from util.sql import *
+from util.dnodes import *
+
+
+class TDTestCase:
+    def init(self, conn, logSql):
+        tdLog.debug("start to execute %s" % __file__)
+        tdSql.init(conn.cursor(), logSql)
+
+    def run(self):
+        cfg={
+            '/mnt/data1 0 0' : 'dataDir',
+            '/mnt/data2 0 0' : 'dataDir'
+        }
+        tdSql.createDir('/mnt/data1')
+        os.system('rm -rf /mnt/data2')
+        
+
+        tdLog.info("================= step1")
+        tdDnodes.stop(1)
+        tdDnodes.deploy(1,cfg)
+        tdDnodes.startWithoutSleep(1)
+        
+        tdLog.info("================= step2")
+        tdSql.taosdStatus(0)
+
+    def stop(self):
+        tdSql.close()
+        tdLog.success("%s successfully executed" % __file__)
+
+
+tdCases.addWindows(__file__, TDTestCase())
+tdCases.addLinux(__file__, TDTestCase())
diff --git a/tests/pytest/multilevel/dirPermissionDenied.py b/tests/pytest/multilevel/dirPermissionDenied.py
new file mode 100644
index 0000000000000000000000000000000000000000..db2cdcf757121c501e33f605aceebdf875d5f944
--- /dev/null
+++ b/tests/pytest/multilevel/dirPermissionDenied.py
@@ -0,0 +1,51 @@
+###################################################################
+#       Copyright (c) 2016 by TAOS Technologies, Inc.
+#             All rights reserved.
+#
+#  This file is proprietary and confidential to TAOS Technologies.
+#  No part of this file may be reproduced, stored, transmitted,
+#  disclosed or used in any form or by any means other than as
+#  expressly provided by the written permission from Jianhui Tao
+#
+###################################################################
+
+# -*- coding: utf-8 -*-
+
+import sys
+import taos
+from util.log import *
+from util.cases import *
+from util.sql import *
+from util.dnodes import *
+
+
+class TDTestCase:
+    def init(self, conn, logSql):
+        tdLog.debug("start to execute %s" % __file__)
+        tdSql.init(conn.cursor(), logSql)
+
+    def run(self):
+        cfg={
+            '/mnt/data1 0 0' : 'dataDir',
+            '/mnt/data2 0 0' : 'dataDir'
+        }
+        tdSql.createDir('/mnt/data1')
+        tdSql.createDir('/mnt/data2')
+        os.system('chmod 111 /mnt/data2')
+
+        tdLog.info("================= step1")
+        tdDnodes.stop(1)
+        tdDnodes.deploy(1,cfg)
+        tdDnodes.startWithoutSleep(1)
+        
+        tdLog.info("================= step2")
+        tdSql.taosdStatus(0)
+        
+
+    def stop(self):
+        tdSql.close()
+        tdLog.success("%s successfully executed" % __file__)
+
+
+tdCases.addWindows(__file__, TDTestCase())
+tdCases.addLinux(__file__, TDTestCase())
diff --git a/tests/pytest/multilevel/fileDistributionSameLevel.py b/tests/pytest/multilevel/fileDistributionSameLevel.py
new file mode 100644
index 0000000000000000000000000000000000000000..e2880283b5b6a76942ac9ac5abba50f8c5bfda1e
--- /dev/null
+++ b/tests/pytest/multilevel/fileDistributionSameLevel.py
@@ -0,0 +1,71 @@
+###################################################################
+#       Copyright (c) 2016 by TAOS Technologies, Inc.
+#             All rights reserved.
+#
+#  This file is proprietary and confidential to TAOS Technologies.
+#  No part of this file may be reproduced, stored, transmitted,
+#  disclosed or used in any form or by any means other than as
+#  expressly provided by the written permission from Jianhui Tao
+#
+###################################################################
+
+# -*- coding: utf-8 -*-
+
+import sys
+import taos
+from util.log import *
+from util.cases import *
+from util.sql import *
+from util.dnodes import *
+
+
+class TDTestCase:
+    def init(self, conn, logSql):
+        tdLog.debug("start to execute %s" % __file__)
+        tdSql.init(conn.cursor(), logSql)
+
+    def run(self):
+        self.ntables = 10
+        self.rowsPerTable = 10        
+        self.ts = 1520000010000
+
+        tdDnodes.stop(1)
+        # Test1 1 dataDir
+        cfg={
+            '10' : 'maxVgroupsPerDb',
+            '/mnt/data00 0 1' : 'dataDir',
+            '/mnt/data01 0 0' : 'dataDir',
+            '/mnt/data02 0 0' : 'dataDir',
+            '/mnt/data03 1 0' : 'dataDir',
+            '/mnt/data04 1 0' : 'dataDir'            
+        }
+        tdSql.createDir('/mnt/data00')
+        tdSql.createDir('/mnt/data01')
+        tdSql.createDir('/mnt/data02')
+        tdSql.createDir('/mnt/data03')
+        tdSql.createDir('/mnt/data04')   
+        
+        tdDnodes.deploy(1,cfg)
+        tdDnodes.startWithoutSleep(1)
+
+        tdSql.execute("create database test days 1")
+        tdSql.execute("use test")
+
+        tdSql.execute("create table tb(ts timestamp, c int)")
+
+        for i in range(self.rowsPerTable):
+            tdSql.execute("insert into tb values(%d, 1)" % (self.ts + i * 86400000))
+        
+        tdDnodes.stop(1)
+        tdDnodes.start(1)
+
+        tdSql.query("select * from test.tb")
+        tdSql.checkRows(10)
+
+
+    def stop(self):
+        tdSql.close()
+        tdLog.success("%s successfully executed" % __file__)
+
+tdCases.addWindows(__file__, TDTestCase())
+tdCases.addLinux(__file__, TDTestCase())
diff --git a/tests/pytest/multilevel/illegelLevelMountPoint.py b/tests/pytest/multilevel/illegelLevelMountPoint.py
new file mode 100644
index 0000000000000000000000000000000000000000..cbf7fc1fe908fa528713576921555380d4a68ed8
--- /dev/null
+++ b/tests/pytest/multilevel/illegelLevelMountPoint.py
@@ -0,0 +1,59 @@
+###################################################################
+#       Copyright (c) 2016 by TAOS Technologies, Inc.
+#             All rights reserved.
+#
+#  This file is proprietary and confidential to TAOS Technologies.
+#  No part of this file may be reproduced, stored, transmitted,
+#  disclosed or used in any form or by any means other than as
+#  expressly provided by the written permission from Jianhui Tao
+#
+###################################################################
+
+# -*- coding: utf-8 -*-
+
+import sys
+import taos
+from util.log import *
+from util.cases import *
+from util.sql import *
+from util.dnodes import *
+
+
+class TDTestCase:
+    def init(self, conn, logSql):
+        tdLog.debug("start to execute %s" % __file__)
+        tdSql.init(conn.cursor(), logSql)
+
+    def run(self):
+        self.ntables = 10
+        self.rowsPerTable = 10
+        self.startTime = 1520000010000
+
+        tdDnodes.stop(1)
+        # Test1 1 dataDir
+        cfg={
+            '/mnt/data1 3 0' : 'dataDir'
+        }
+        tdSql.createDir('/mnt/data1')
+        
+        tdDnodes.deploy(1,cfg)
+        tdDnodes.startWithoutSleep(1)
+
+        tdDnodes.stop(1)
+        # Test1 1 dataDir
+        cfg={
+            '/mnt/data1 -1 0' : 'dataDir'         
+        }
+        tdSql.createDir('/mnt/data1')
+        
+        tdDnodes.deploy(1,cfg)
+        tdDnodes.startWithoutSleep(1)
+        
+        tdSql.taosdStatus(0)
+
+    def stop(self):
+        tdSql.close()
+        tdLog.success("%s successfully executed" % __file__)
+
+tdCases.addWindows(__file__, TDTestCase())
+tdCases.addLinux(__file__, TDTestCase())
diff --git a/tests/pytest/multilevel/middleLevelMissing.py b/tests/pytest/multilevel/middleLevelMissing.py
new file mode 100644
index 0000000000000000000000000000000000000000..727c2380ae0f3a148a475ae8ebdd01e8ff1f543f
--- /dev/null
+++ b/tests/pytest/multilevel/middleLevelMissing.py
@@ -0,0 +1,64 @@
+###################################################################
+#       Copyright (c) 2016 by TAOS Technologies, Inc.
+#             All rights reserved.
+#
+#  This file is proprietary and confidential to TAOS Technologies.
+#  No part of this file may be reproduced, stored, transmitted,
+#  disclosed or used in any form or by any means other than as
+#  expressly provided by the written permission from Jianhui Tao
+#
+###################################################################
+
+# -*- coding: utf-8 -*-
+
+import sys
+import taos
+from util.log import *
+from util.cases import *
+from util.sql import *
+from util.dnodes import *
+
+
+class TDTestCase:
+    def init(self, conn, logSql):
+        tdLog.debug("start to execute %s" % __file__)
+        tdSql.init(conn.cursor(), logSql)
+
+    def run(self):
+        self.ntables = 10
+        self.rowsPerTable = 10
+        self.startTime = 1520000010000
+
+        tdDnodes.stop(1)
+        # Test1 1 dataDir
+        cfg={
+            '/mnt/data1 1 0' : 'dataDir'           
+        }
+        tdSql.createDir('/mnt/data1')
+        
+        tdDnodes.deploy(1,cfg)
+        tdDnodes.startWithoutSleep(1)
+        
+        tdSql.taosdStatus(0)
+
+
+        tdDnodes.stop(1)
+        # Test2 2 dataDir
+        cfg={
+            '/mnt/data1 0 1' : 'dataDir',
+            '/mnt/data1 2 0' : 'dataDir'
+        }
+        tdSql.createDir('/mnt/data1')
+        
+        tdDnodes.deploy(1,cfg)
+        tdDnodes.startWithoutSleep(1)
+        
+        tdSql.taosdStatus(0)
+
+    def stop(self):
+        tdSql.close()
+        tdLog.success("%s successfully executed" % __file__)
+
+
+tdCases.addWindows(__file__, TDTestCase())
+tdCases.addLinux(__file__, TDTestCase())
diff --git a/tests/pytest/multilevel/moreThan16disks.py b/tests/pytest/multilevel/moreThan16disks.py
new file mode 100644
index 0000000000000000000000000000000000000000..407e5aa6970781ce5b511faa1f4f74e7a18e75a8
--- /dev/null
+++ b/tests/pytest/multilevel/moreThan16disks.py
@@ -0,0 +1,53 @@
+###################################################################
+#       Copyright (c) 2016 by TAOS Technologies, Inc.
+#             All rights reserved.
+#
+#  This file is proprietary and confidential to TAOS Technologies.
+#  No part of this file may be reproduced, stored, transmitted,
+#  disclosed or used in any form or by any means other than as
+#  expressly provided by the written permission from Jianhui Tao
+#
+###################################################################
+
+# -*- coding: utf-8 -*-
+
+import sys
+import taos
+from util.log import *
+from util.cases import *
+from util.sql import *
+from util.dnodes import *
+
+
+class TDTestCase:
+    def init(self, conn, logSql):
+        tdLog.debug("start to execute %s" % __file__)
+        tdSql.init(conn.cursor(), logSql)
+
+    def run(self):
+        cfg={}
+        for i in range(17):
+            if i == 0 :
+                datadir = '/mnt/data%d 0 1' % (i+1)
+            else:
+                datadir = '/mnt/data%d 0 0' % (i+1)
+            cfg.update({ datadir : 'dataDir' })
+            tdSql.createDir('/mnt/data%d' % (i+1))
+        
+
+        tdLog.info("================= step1")
+        tdDnodes.stop(1)
+        tdDnodes.deploy(1,cfg)
+        tdDnodes.startWithoutSleep(1)
+        
+        tdLog.info("================= step2")
+        
+        tdSql.taosdStatus(0)
+
+    def stop(self):
+        tdSql.close()
+        tdLog.success("%s successfully executed" % __file__)
+
+
+tdCases.addWindows(__file__, TDTestCase())
+tdCases.addLinux(__file__, TDTestCase())
diff --git a/tests/pytest/multilevel/multiMainMountPoint.py b/tests/pytest/multilevel/multiMainMountPoint.py
new file mode 100644
index 0000000000000000000000000000000000000000..c5af816205cdbd325c11d600c560104ca1801b93
--- /dev/null
+++ b/tests/pytest/multilevel/multiMainMountPoint.py
@@ -0,0 +1,49 @@
+###################################################################
+#       Copyright (c) 2016 by TAOS Technologies, Inc.
+#             All rights reserved.
+#
+#  This file is proprietary and confidential to TAOS Technologies.
+#  No part of this file may be reproduced, stored, transmitted,
+#  disclosed or used in any form or by any means other than as
+#  expressly provided by the written permission from Jianhui Tao
+#
+###################################################################
+
+# -*- coding: utf-8 -*-
+
+import sys
+import taos
+from util.log import *
+from util.cases import *
+from util.sql import *
+from util.dnodes import *
+
+
+class TDTestCase:
+    def init(self, conn, logSql):
+        tdLog.debug("start to execute %s" % __file__)
+        tdSql.init(conn.cursor(), logSql)
+
+    def run(self):
+        cfg={
+            '/mnt/data1' : 'dataDir',
+            '/mnt/data2' : 'dataDir'
+        }
+        tdSql.createDir('/mnt/data1')
+        tdSql.createDir('/mnt/data2')
+
+        tdLog.info("================= step1")
+        tdDnodes.stop(1)
+        tdDnodes.deploy(1,cfg)
+        tdDnodes.startWithoutSleep(1)
+        
+        tdLog.info("================= step2")
+        tdSql.taosdStatus(0)
+
+    def stop(self):
+        tdSql.close()
+        tdLog.success("%s successfully executed" % __file__)
+
+
+tdCases.addWindows(__file__, TDTestCase())
+tdCases.addLinux(__file__, TDTestCase())
diff --git a/tests/pytest/multilevel/noneMainMountPoint.py b/tests/pytest/multilevel/noneMainMountPoint.py
new file mode 100644
index 0000000000000000000000000000000000000000..67fab7c7a24510244a663dbc20f2c212012f712d
--- /dev/null
+++ b/tests/pytest/multilevel/noneMainMountPoint.py
@@ -0,0 +1,49 @@
+###################################################################
+#       Copyright (c) 2016 by TAOS Technologies, Inc.
+#             All rights reserved.
+#
+#  This file is proprietary and confidential to TAOS Technologies.
+#  No part of this file may be reproduced, stored, transmitted,
+#  disclosed or used in any form or by any means other than as
+#  expressly provided by the written permission from Jianhui Tao
+#
+###################################################################
+
+# -*- coding: utf-8 -*-
+
+import sys
+import taos
+from util.log import *
+from util.cases import *
+from util.sql import *
+from util.dnodes import *
+
+
+class TDTestCase:
+    def init(self, conn, logSql):
+        tdLog.debug("start to execute %s" % __file__)
+        tdSql.init(conn.cursor(), logSql)
+
+    def run(self):
+        cfg={
+            '/mnt/data1 0 0' : 'dataDir',
+            '/mnt/data2 0 0' : 'dataDir'
+        }
+        tdSql.createDir('/mnt/data1')
+        tdSql.createDir('/mnt/data2')
+
+        tdLog.info("================= step1")
+        tdDnodes.stop(1)
+        tdDnodes.deploy(1,cfg)
+        tdDnodes.startWithoutSleep(1)
+        
+        tdLog.info("================= step2")
+        tdSql.taosdStatus(0)
+
+    def stop(self):
+        tdSql.close()
+        tdLog.success("%s successfully executed" % __file__)
+
+
+tdCases.addWindows(__file__, TDTestCase())
+tdCases.addLinux(__file__, TDTestCase())
diff --git a/tests/pytest/multilevel/retentionTest.py b/tests/pytest/multilevel/retentionTest.py
new file mode 100644
index 0000000000000000000000000000000000000000..9ea59d9d5918d851f69acc69704926d97f3f5375
--- /dev/null
+++ b/tests/pytest/multilevel/retentionTest.py
@@ -0,0 +1,82 @@
+###################################################################
+#       Copyright (c) 2016 by TAOS Technologies, Inc.
+#             All rights reserved.
+#
+#  This file is proprietary and confidential to TAOS Technologies.
+#  No part of this file may be reproduced, stored, transmitted,
+#  disclosed or used in any form or by any means other than as
+#  expressly provided by the written permission from Jianhui Tao
+#
+###################################################################
+
+# -*- coding: utf-8 -*-
+
+import sys
+import taos
+import os
+from util.log import *
+from util.cases import *
+from util.sql import *
+from util.dnodes import *
+
+
+class TDTestCase:
+    def init(self, conn, logSql):
+        tdLog.debug("start to execute %s" % __file__)
+        tdSql.init(conn.cursor(), logSql)
+
+    def run(self):
+        self.ntables = 10
+        self.rowsPerTable = 10        
+        self.startTime = 1520000010000
+
+        tdDnodes.stop(1)
+        # Test1 1 dataDir
+        cfg={
+            '/mnt/data00 0 1' : 'dataDir',
+            '/mnt/data01 0 0' : 'dataDir',
+            '/mnt/data02 0 0' : 'dataDir',
+            '/mnt/data10 1 0' : 'dataDir',
+            '/mnt/data11 1 0' : 'dataDir',
+            '/mnt/data12 1 0' : 'dataDir',
+            '/mnt/data20 2 0' : 'dataDir',
+            '/mnt/data21 2 0' : 'dataDir',
+            '/mnt/data22 2 0' : 'dataDir'          
+        }
+        tdSql.createDir('/mnt/data00')
+        tdSql.createDir('/mnt/data01')
+        tdSql.createDir('/mnt/data02')
+        tdSql.createDir('/mnt/data10')
+        tdSql.createDir('/mnt/data11')
+        tdSql.createDir('/mnt/data12')
+        tdSql.createDir('/mnt/data20')
+        tdSql.createDir('/mnt/data21')
+        tdSql.createDir('/mnt/data22')
+        
+        tdDnodes.deploy(1,cfg)
+        tdDnodes.startWithoutSleep(1)
+        
+        tdSql.execute("create database test days 1 keep 15,5,10")
+        tdSql.execute("use test")
+
+        tdSql.execute("create table tb(ts timestamp, c int)")
+
+        count = 0
+        os.system("sudo timedatectl set-ntp false")
+
+        for i in range(self.rowsPerTable):
+            tdSql.execute("insert into tb values(now, 1)")
+            count += 1
+            tdSql.query("select * from tb")
+            tdSql.checkRows(count)
+            tdDnodes.stop(1)
+            os.system("sudo date -s $(date -d \"${DATE} 1 day\" \"+%Y%m%d\")")
+            tdDnodes.start(1)
+
+    def stop(self):
+        os.system("sudo timedatectl set-ntp true")
+        tdSql.close()
+        tdLog.success("%s successfully executed" % __file__)
+
+tdCases.addWindows(__file__, TDTestCase())
+tdCases.addLinux(__file__, TDTestCase())
diff --git a/tests/pytest/multilevel/threeLevelMountPoint.py b/tests/pytest/multilevel/threeLevelMountPoint.py
new file mode 100644
index 0000000000000000000000000000000000000000..ccaf95f47d389e053c042a4a20cefad2c7d08776
--- /dev/null
+++ b/tests/pytest/multilevel/threeLevelMountPoint.py
@@ -0,0 +1,65 @@
+###################################################################
+#       Copyright (c) 2016 by TAOS Technologies, Inc.
+#             All rights reserved.
+#
+#  This file is proprietary and confidential to TAOS Technologies.
+#  No part of this file may be reproduced, stored, transmitted,
+#  disclosed or used in any form or by any means other than as
+#  expressly provided by the written permission from Jianhui Tao
+#
+###################################################################
+
+# -*- coding: utf-8 -*-
+
+import sys
+import taos
+from util.log import *
+from util.cases import *
+from util.sql import *
+from util.dnodes import *
+
+
+class TDTestCase:
+    def init(self, conn, logSql):
+        tdLog.debug("start to execute %s" % __file__)
+        tdSql.init(conn.cursor(), logSql)
+
+    def run(self):
+        self.ntables = 10
+        self.rowsPerTable = 10
+        self.startTime = 1520000010000
+
+        tdDnodes.stop(1)
+        # Test1 1 dataDir
+        cfg={
+            '/mnt/data00 0 1' : 'dataDir',
+            '/mnt/data01 0 0' : 'dataDir',
+            '/mnt/data02 0 0' : 'dataDir',
+            '/mnt/data10 1 0' : 'dataDir',
+            '/mnt/data11 1 0' : 'dataDir',
+            '/mnt/data12 1 0' : 'dataDir',
+            '/mnt/data20 2 0' : 'dataDir',
+            '/mnt/data21 2 0' : 'dataDir',
+            '/mnt/data22 2 0' : 'dataDir'          
+        }
+        tdSql.createDir('/mnt/data00')
+        tdSql.createDir('/mnt/data01')
+        tdSql.createDir('/mnt/data02')
+        tdSql.createDir('/mnt/data10')
+        tdSql.createDir('/mnt/data11')
+        tdSql.createDir('/mnt/data12')
+        tdSql.createDir('/mnt/data20')
+        tdSql.createDir('/mnt/data21')
+        tdSql.createDir('/mnt/data22')
+        
+        tdDnodes.deploy(1,cfg)
+        tdDnodes.startWithoutSleep(1)
+        
+        tdSql.taosdStatus(1)
+
+    def stop(self):
+        tdSql.close()
+        tdLog.success("%s successfully executed" % __file__)
+
+tdCases.addWindows(__file__, TDTestCase())
+tdCases.addLinux(__file__, TDTestCase())
diff --git a/tests/pytest/multilevel/wrongLevelMountPoint.py b/tests/pytest/multilevel/wrongLevelMountPoint.py
new file mode 100644
index 0000000000000000000000000000000000000000..00b9eb89c69a21a9d02f4927d508b8275e07a7f7
--- /dev/null
+++ b/tests/pytest/multilevel/wrongLevelMountPoint.py
@@ -0,0 +1,49 @@
+###################################################################
+#       Copyright (c) 2016 by TAOS Technologies, Inc.
+#             All rights reserved.
+#
+#  This file is proprietary and confidential to TAOS Technologies.
+#  No part of this file may be reproduced, stored, transmitted,
+#  disclosed or used in any form or by any means other than as
+#  expressly provided by the written permission from Jianhui Tao
+#
+###################################################################
+
+# -*- coding: utf-8 -*-
+
+import sys
+import taos
+from util.log import *
+from util.cases import *
+from util.sql import *
+from util.dnodes import *
+
+
+class TDTestCase:
+    def init(self, conn, logSql):
+        tdLog.debug("start to execute %s" % __file__)
+        tdSql.init(conn.cursor(), logSql)
+
+    def run(self):
+        self.ntables = 10
+        self.rowsPerTable = 10
+        self.startTime = 1520000010000
+
+        tdDnodes.stop(1)
+        # Test1 1 dataDir
+        cfg={
+            '/mnt/data1 1 1' : 'dataDir'     
+        }
+        tdSql.createDir('/mnt/data1')
+        
+        tdDnodes.deploy(1,cfg)
+        tdDnodes.startWithoutSleep(1)
+        
+        tdSql.taosdStatus(0)
+
+    def stop(self):
+        tdSql.close()
+        tdLog.success("%s successfully executed" % __file__)
+
+tdCases.addWindows(__file__, TDTestCase())
+tdCases.addLinux(__file__, TDTestCase())
diff --git a/tests/pytest/query/query.py b/tests/pytest/query/query.py
index d0750ac4a5cbe631e38017e6c81746659ad16e49..756aa0eda998aaa0aad30e94b2a7192d7d53bb65 100644
--- a/tests/pytest/query/query.py
+++ b/tests/pytest/query/query.py
@@ -23,6 +23,8 @@ class TDTestCase:
         tdLog.debug("start to execute %s" % __file__)
         tdSql.init(conn.cursor(), logSql)
 
+        self.ts = 1538548685000
+
     def run(self):
         tdSql.prepare()
 
@@ -77,7 +79,37 @@ class TDTestCase:
         tdSql.checkRows(1)
         tdSql.checkData(0, 0, 1)
 
+        ## test case for https://jira.taosdata.com:18080/browse/TD-1930
+        tdSql.execute("create table tb(ts timestamp, c1 int, c2 binary(10), c3 nchar(10), c4 float, c5 bool)")
+        for i in range(10):
+            tdSql.execute("insert into tb values(%d, %d, 'binary%d', 'nchar%d', %f, %d)" % (self.ts + i, i, i, i, i + 0.1, i % 2))
+        
+        tdSql.error("select * from tb where c2 = binary2")
+        tdSql.error("select * from tb where c3 = nchar2")
+
+        tdSql.query("select * from tb where c2 = 'binary2' ")
+        tdSql.checkRows(1)
+
+        tdSql.query("select * from tb where c3 = 'nchar2' ")
+        tdSql.checkRows(1)
+
+        tdSql.query("select * from tb where c1 = '2' ")
+        tdSql.checkRows(1)
+
+        tdSql.query("select * from tb where c1 = 2 ")
+        tdSql.checkRows(1)
+
+        tdSql.query("select * from tb where c4 = '0.1' ")
+        tdSql.checkRows(1)
+
+        tdSql.query("select * from tb where c4 = 0.1 ")
+        tdSql.checkRows(1)
+
+        tdSql.query("select * from tb where c5 = true ")
+        tdSql.checkRows(5)
 
+        tdSql.query("select * from tb where c5 = 'true' ")
+        tdSql.checkRows(5)
 
     def stop(self):
         tdSql.close()
diff --git a/tests/pytest/stream/new.py b/tests/pytest/stream/new.py
index 12ec6d4507710869632eac77d719217b3b0ed7b3..70f300e937b2ed422231a774d2bca1183ce6fd0a 100644
--- a/tests/pytest/stream/new.py
+++ b/tests/pytest/stream/new.py
@@ -43,7 +43,7 @@ class TDTestCase:
         tdLog.info("=============== step3")
         start = time.time()
         tdSql.waitedQuery("select * from st", 1, 120)
-        delay = int(time.time() - start) + 20
+        delay = int(time.time() - start) + 80
         v = tdSql.getData(0, 3)
         if v >= 51:
             tdLog.exit("value is %d, which is larger than 51" % v)
diff --git a/tests/pytest/table/create.py b/tests/pytest/table/create.py
index a0991d674a23065cbec5ae3b69d6bdf37ee363ac..ecd4d011418ed7eca0d028262159c5614c0f490c 100644
--- a/tests/pytest/table/create.py
+++ b/tests/pytest/table/create.py
@@ -56,6 +56,12 @@ class TDTestCase:
         tdSql.query("show stables like 'st%' ")
         tdSql.checkRows(3)
         
+        # case for defect: https://jira.taosdata.com:18080/browse/TD-2693
+        tdSql.execute("create database db2")
+        tdSql.execute("use db2")
+        tdSql.execute("create table stb(ts timestamp, c int) tags(t int)")
+        tdSql.error("insert into db2.tb6 using db2.stb tags(1) values(now 1) tb2 using db2. tags( )values(now 2)")
+        
     def stop(self):
         tdSql.close()
         tdLog.success("%s successfully executed" % __file__)
diff --git a/tests/pytest/util/dnodes.py b/tests/pytest/util/dnodes.py
index afea23372f5bd13949bb6967392167df59c3d2b2..91c75efe9762a18042660423708e6dd9475166dd 100644
--- a/tests/pytest/util/dnodes.py
+++ b/tests/pytest/util/dnodes.py
@@ -208,14 +208,24 @@ class TDDnode:
             self.cfg("publicIp", "192.168.0.%d" % (self.index))
             self.cfg("internalIp", "192.168.0.%d" % (self.index))
             self.cfg("privateIp", "192.168.0.%d" % (self.index))
-        
-        self.cfg("dataDir",self.dataDir)
-        self.cfg("logDir",self.logDir)
-        print(updatecfgDict)
+        self.cfgDict["dataDir"] = self.dataDir
+        self.cfgDict["logDir"] = self.logDir
+        # self.cfg("dataDir",self.dataDir)
+        # self.cfg("logDir",self.logDir)
+        # print(updatecfgDict)
+        isFirstDir = 1
         if updatecfgDict[0] and updatecfgDict[0][0]:
             print(updatecfgDict[0][0])
             for key,value in updatecfgDict[0][0].items():
-                self.addExtraCfg(key,value)
+                if value == 'dataDir' :
+                    if isFirstDir:
+                        self.cfgDict.pop('dataDir')
+                        self.cfg(value,key)
+                        isFirstDir = 0
+                    else:
+                        self.cfg(value,key)
+                else:
+                    self.addExtraCfg(key,value)
         for key, value in self.cfgDict.items():
             self.cfg(key, value)
 
@@ -282,13 +292,15 @@ class TDDnode:
                     break
             popen = subprocess.Popen('tail -f ' + logFile, stdout=subprocess.PIPE, stderr=subprocess.PIPE, shell=True)
             pid = popen.pid
-            print('Popen.pid:' + str(pid))
+            # print('Popen.pid:' + str(pid))
+            timeout = time.time() + 60*2
             while True:
                 line = popen.stdout.readline().strip()
                 if bkey in line:
-                    print(line)
                     popen.kill()
                     break
+                if time.time() > timeout:
+                    tdLog.exit('wait too long for taosd start')
             tdLog.debug("the dnode:%d has been started." % (self.index))
         else:
             tdLog.debug("wait 10 seconds for the dnode:%d to start." % (self.index))
diff --git a/tests/pytest/util/sql.py b/tests/pytest/util/sql.py
index b2ed6212fd643c158f7ed6f4cc6cb2449a512a2e..4f7607fc6c000d7ca55035e6973bfb5577a67964 100644
--- a/tests/pytest/util/sql.py
+++ b/tests/pytest/util/sql.py
@@ -16,9 +16,12 @@ import os
 import time
 import datetime
 import inspect
+import psutil
+import shutil
 from util.log import *
 
 
+
 class TDSql:
     def __init__(self):
         self.queryRows = 0
@@ -183,6 +186,50 @@ class TDSql:
             tdLog.exit("%s(%d) failed: sql:%s, affectedRows:%d != expect:%d" % args)
 
         tdLog.info("sql:%s, affectedRows:%d == expect:%d" % (self.sql, self.affectedRows, expectAffectedRows))
-
-
+    
+    def taosdStatus(self, state):
+        tdLog.sleep(5)
+        pstate = 0
+        for i in range(30):
+            pstate = 0
+            pl = psutil.pids()
+            for pid in pl:
+                if psutil.Process(pid).name == 'taosd':
+                    pstate = 1
+                    break
+            if pstate:
+                tdLog.sleep(5)
+                continue
+            pstate = 0
+            break
+            
+        args=(pstate,state)
+        if pstate == state:
+            tdLog.info("taosd state is %d == expect:%d" %args)
+        else:
+            tdLog.exit("taosd state is %d != expect:%d" %args)
+        pass
+
+    def haveFile(self, dir, state):
+        if os.path.exists(dir) and os.path.isdir(dir):
+            if not os.listdir(dir):
+                if state :
+                    tdLog.exit("dir: %s is empty, expect: not empty" %dir)
+                else:
+                    tdLog.info("dir: %s is empty, expect: empty" %dir)
+            else:  
+                if state :
+                    tdLog.info("dir: %s is empty, expect: not empty" %dir)
+                else:
+                    tdLog.exit("dir: %s is empty, expect: empty" %dir)  
+        else:
+            tdLog.exit("dir: %s doesn't exist" %dir)
+    def createDir(self, dir):
+        if os.path.exists(dir):
+            shutil.rmtree(dir)
+            tdLog.info("dir: %s is removed" %dir)
+        os.makedirs( dir, 755 )
+        tdLog.info("dir: %s is created" %dir)
+        pass
+        
 tdSql = TDSql()
diff --git a/tests/script/general/cache/new_metrics.sim b/tests/script/general/cache/new_metrics.sim
index 0e304d9acb0ec3ceba18993846f9f6d8269ff966..84f9e40de39b6946984204f4e3cb6f7e395af0e2 100644
--- a/tests/script/general/cache/new_metrics.sim
+++ b/tests/script/general/cache/new_metrics.sim
@@ -3,7 +3,6 @@ system sh/stop_dnodes.sh
 
 system sh/deploy.sh -n dnode1 -i 1
 system sh/cfg.sh -n dnode1 -c walLevel -v 0
-system sh/cfg.sh -n dnode1 -c tableMetaKeepTimer -v 10
 system sh/exec.sh -n dnode1 -s start
 
 sleep 3000
diff --git a/tests/script/general/cache/restart_metrics.sim b/tests/script/general/cache/restart_metrics.sim
index 18c514acbf5a038f998035302cca8bb0fbd95a0b..f24768859fe8b771b9c03e0ea328d0066174909d 100644
--- a/tests/script/general/cache/restart_metrics.sim
+++ b/tests/script/general/cache/restart_metrics.sim
@@ -3,7 +3,6 @@ system sh/stop_dnodes.sh
 
 system sh/deploy.sh -n dnode1 -i 1
 system sh/cfg.sh -n dnode1 -c walLevel -v 0
-system sh/cfg.sh -n dnode1 -c tableMetaKeepTimer -v 10
 system sh/exec.sh -n dnode1 -s start
 
 sleep 3000
@@ -53,7 +52,6 @@ system sh/exec.sh -n dnode1 -s stop
 sleep 5000
 system sh/deploy.sh -n dnode1 -i 1
 system sh/cfg.sh -n dnode1 -c walLevel -v 0
-system sh/cfg.sh -n dnode1 -c tableMetaKeepTimer -v 10
 system sh/exec.sh -n dnode1 -s start
 
 print =============== step3
diff --git a/tests/script/general/cache/restart_table.sim b/tests/script/general/cache/restart_table.sim
index c4e6c6f2acc8f0fb0902a6a6adf8d9b91984a712..8697c26bc3d7708a4eca1c3480d6cdb248c072dc 100644
--- a/tests/script/general/cache/restart_table.sim
+++ b/tests/script/general/cache/restart_table.sim
@@ -3,7 +3,6 @@ system sh/stop_dnodes.sh
 
 system sh/deploy.sh -n dnode1 -i 1
 system sh/cfg.sh -n dnode1 -c walLevel -v 0
-system sh/cfg.sh -n dnode1 -c tableMetaKeepTimer -v 10
 system sh/exec.sh -n dnode1 -s start
 
 sleep 3000
@@ -37,7 +36,6 @@ system sh/exec.sh -n dnode1 -s stop
 sleep 5000
 system sh/deploy.sh -n dnode1 -i 1
 system sh/cfg.sh -n dnode1 -c walLevel -v 0
-system sh/cfg.sh -n dnode1 -c tableMetaKeepTimer -v 10
 system sh/exec.sh -n dnode1 -s start
 
 print =============== step3
diff --git a/tests/script/general/parser/alter.sim b/tests/script/general/parser/alter.sim
index aec519085c1116a51b810d343d5dd31b57419cce..eae9b88be95ed91b1e0889c8640909a6bc70f592 100644
--- a/tests/script/general/parser/alter.sim
+++ b/tests/script/general/parser/alter.sim
@@ -2,7 +2,6 @@ system sh/stop_dnodes.sh
 
 system sh/deploy.sh -n dnode1 -i 1
 system sh/cfg.sh -n dnode1 -c walLevel -v 0
-system sh/cfg.sh -n dnode1 -c tableMetaKeepTimer -v 3
 system sh/exec.sh -n dnode1 -s start
 sleep 100
 sql connect
diff --git a/tests/script/general/parser/alter_stable.sim b/tests/script/general/parser/alter_stable.sim
index 52916ebadada05eda4bf6e8165f374175e01312b..17fc8d984a8899c136cb8451f0fa1e9038bf2cbd 100644
--- a/tests/script/general/parser/alter_stable.sim
+++ b/tests/script/general/parser/alter_stable.sim
@@ -2,7 +2,6 @@ system sh/stop_dnodes.sh
 
 system sh/deploy.sh -n dnode1 -i 1
 system sh/cfg.sh -n dnode1 -c walLevel -v 0
-system sh/cfg.sh -n dnode1 -c tableMetaKeepTimer -v 3
 system sh/exec.sh -n dnode1 -s start
 sleep 100
 sql connect
diff --git a/tests/script/general/parser/binary_escapeCharacter.sim b/tests/script/general/parser/binary_escapeCharacter.sim
index 7c5a8f9319bda3f80487425866aa389f6c3c1489..dc54add763e5cf34595c479373020c7c4baae63c 100644
--- a/tests/script/general/parser/binary_escapeCharacter.sim
+++ b/tests/script/general/parser/binary_escapeCharacter.sim
@@ -2,7 +2,6 @@ system sh/stop_dnodes.sh
 
 system sh/deploy.sh -n dnode1 -i 1
 system sh/cfg.sh -n dnode1 -c walLevel -v 0
-system sh/cfg.sh -n dnode1 -c tableMetaKeepTimer -v 3
 system sh/exec.sh -n dnode1 -s start
 sleep 100
 sql connect
diff --git a/tests/script/general/parser/columnValue.sim b/tests/script/general/parser/columnValue.sim
index 5f8152b3f0fa0a2171ca97a0e2e7d4f4e6073ccc..4e6c6640042a80ffafd008538f2c46e5f43c0318 100644
--- a/tests/script/general/parser/columnValue.sim
+++ b/tests/script/general/parser/columnValue.sim
@@ -3,7 +3,6 @@ system sh/stop_dnodes.sh
 
 system sh/deploy.sh -n dnode1 -i 1
 system sh/cfg.sh -n dnode1 -c walLevel -v 0
-system sh/cfg.sh -n dnode1 -c tableMetaKeepTimer -v 3
 system sh/exec.sh -n dnode1 -s start
 sleep 100
 sql connect
diff --git a/tests/script/general/parser/columnValue_unsign.sim b/tests/script/general/parser/columnValue_unsign.sim
index 22ef5c42a38bc67e3b4cb4a7705bd95344ab09fd..895b13961ef729544a9ac14c85e4e37e6f723423 100644
--- a/tests/script/general/parser/columnValue_unsign.sim
+++ b/tests/script/general/parser/columnValue_unsign.sim
@@ -106,4 +106,70 @@ if $data01 != 1 then
   return -1
 endi
 
-sql select a+b+c from mt_unsigned_1 where a is null;
\ No newline at end of file
+sql select a+b+c from mt_unsigned_1 where a is null;
+if $rows != 1 then
+  return -1
+endi
+
+if $data00 != 6.000000000 then
+  return -1
+endi
+
+sql select count(*), a from mt_unsigned_1 group by a;
+if $rows != 1 then
+  return -1
+endi
+
+if $data00 != 1 then
+  return -1
+endi
+
+if $data01 != 1 then
+  return -1
+endi
+
+sql select count(*), b from mt_unsigned_1 group by b;
+if $rows != 1 then
+  return -1
+endi
+
+if $data00 != 1 then
+  return -1
+endi
+
+if $data01 != 2 then
+  return -1
+endi
+
+sql select count(*), c from mt_unsigned_1 group by c;
+if $rows != 1 then
+  return -1
+endi
+
+if $data00 != 1 then
+  return -1
+endi
+
+if $data01 != 3 then
+  return -1
+endi
+
+sql select count(*), d from mt_unsigned_1 group by d;
+if $rows != 1 then
+  return -1
+endi
+
+if $data00 != 1 then
+  return -1
+endi
+
+if $data01 != 4 then
+  return -1
+endi
+
+// todo insert more rows and chec it
+sql select first(a),count(b),last(c),sum(b),spread(d),avg(c),min(b),max(a),stddev(a) from mt_unsigned_1;
+if $rows != 1 then
+  return -1
+endi
+
diff --git a/tests/script/general/parser/function.sim b/tests/script/general/parser/function.sim
index 1c255b92a2d0665fe05cb818eaf6a9a545e08e70..7d702e989e6f816832adbd92507efbef68fdb088 100644
--- a/tests/script/general/parser/function.sim
+++ b/tests/script/general/parser/function.sim
@@ -2,7 +2,6 @@ system sh/stop_dnodes.sh
 
 system sh/deploy.sh -n dnode1 -i 1
 system sh/cfg.sh -n dnode1 -c walLevel -v 0
-system sh/cfg.sh -n dnode1 -c tableMetaKeepTimer -v 3
 system sh/exec.sh -n dnode1 -s start
 sleep 100
 sql connect
@@ -228,7 +227,7 @@ sql select twa(k),avg(k),count(1) from t1 where ts>='2015-8-18 00:00:00' and ts<
 sql select twa(k),avg(k),count(1) from t1 where ts>='2015-8-18 00:00:00' and ts<='2015-8-18 00:30:00' interval(10m) order by ts desc
 
 
-#todo add test case while column filter exists.
+#todo add test case while column filter exists for twa query
 
 #sql select count(*),TWA(k) from tm0 where ts>='1970-1-1 13:43:00' and ts<='1970-1-1 13:44:10' interval(9s)
 
@@ -373,3 +372,14 @@ sql select twa(k) from tm2 where ts='2020-12-29 18:46:19.109'
 if $rows != 0 then
   return -1
 endi
+
+print ========================> TD-1787
+sql create table cars(ts timestamp, c int) tags(id int);
+sql create table car1 using cars tags(1);
+sql create table car2 using cars tags(2);
+sql insert into car1 (ts, c) values (now,1) car2(ts, c) values(now, 2);
+sql drop table cars;
+sql create table cars(ts timestamp, c int) tags(id int);
+sql create table car1 using cars tags(1);
+sql create table car2 using cars tags(2);
+sql insert into car1 (ts, c) values (now,1) car2(ts, c) values(now, 2);
\ 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 b3200da88e0a9d77899031d71271e580cb279c3b..4e7c8ab3548a54a465801c602c0d6572b347b284 100644
--- a/tests/script/general/parser/null_char.sim
+++ b/tests/script/general/parser/null_char.sim
@@ -3,7 +3,6 @@ system sh/stop_dnodes.sh
 
 system sh/deploy.sh -n dnode1 -i 1
 system sh/cfg.sh -n dnode1 -c walLevel -v 0
-system sh/cfg.sh -n dnode1 -c tableMetaKeepTimer -v 3
 system sh/exec.sh -n dnode1 -s start
 
 sleep 100
diff --git a/tests/script/general/stream/restart_stream.sim b/tests/script/general/stream/restart_stream.sim
index 138e2a6e2ef6e6aeb46c14b7e8fceb851e36eaa8..b5a2038d9b207217f9a41250939b9853e2e822d1 100644
--- a/tests/script/general/stream/restart_stream.sim
+++ b/tests/script/general/stream/restart_stream.sim
@@ -3,7 +3,6 @@ system sh/stop_dnodes.sh
 
 system sh/deploy.sh -n dnode1 -i 1
 system sh/cfg.sh -n dnode1 -c walLevel -v 0
-system sh/cfg.sh -n dnode1 -c tableMetaKeepTimer -v 1
 system sh/exec.sh -n dnode1 -s start
 
 sleep 3000
@@ -98,7 +97,6 @@ print =============== step4
 system sh/exec.sh -n dnode1 -s stop
 system sh/deploy.sh -n dnode1 -i 1
 system sh/cfg.sh -n dnode1 -c walLevel -v 0
-system sh/cfg.sh -n dnode1 -c tableMetaKeepTimer -v 1
 system sh/exec.sh -n dnode1 -s start
 
 print =============== step5
diff --git a/tests/script/issue/TD-2677.sim b/tests/script/issue/TD-2677.sim
new file mode 100644
index 0000000000000000000000000000000000000000..8d2058a3851e456dd85f8d6a295ce45b7a6fd3bd
--- /dev/null
+++ b/tests/script/issue/TD-2677.sim
@@ -0,0 +1,111 @@
+system sh/stop_dnodes.sh
+
+system sh/deploy.sh -n dnode1 -i 1
+system sh/deploy.sh -n dnode2 -i 2
+system sh/deploy.sh -n dnode3 -i 3
+
+system sh/cfg.sh -n dnode1 -c numOfMnodes -v 3
+system sh/cfg.sh -n dnode2 -c numOfMnodes -v 3
+system sh/cfg.sh -n dnode3 -c numOfMnodes -v 3
+
+system sh/cfg.sh -n dnode1 -c mnodeEqualVnodeNum -v 4
+system sh/cfg.sh -n dnode2 -c mnodeEqualVnodeNum -v 4
+system sh/cfg.sh -n dnode3 -c mnodeEqualVnodeNum -v 4
+
+print ============== deploy
+
+system sh/exec.sh -n dnode1 -s start 
+sql connect
+
+sql create dnode $hostname2
+sql create dnode $hostname3
+system sh/exec.sh -n dnode2 -s start 
+system sh/exec.sh -n dnode3 -s start 
+
+print  =============== step1
+$x = 0
+step1: 
+	$x = $x + 1
+	sleep 1000
+	if $x == 10 then
+		return -1
+	endi
+
+sql show dnodes
+print dnode1 $data4_1
+print dnode2 $data4_2
+print dnode3 $data4_3
+
+if $data4_1 != ready then
+  goto step1
+endi
+if $data4_2 != ready then
+  goto step1
+endi
+if $data4_3 != ready then
+  goto step1
+endi
+
+sql show mnodes
+$mnode1Role = $data2_1
+print mnode1Role $mnode1Role
+$mnode2Role = $data2_2
+print mnode2Role $mnode2Role
+$mnode3Role = $data2_3
+print mnode3Role $mnode3Role
+
+if $mnode1Role != master then
+  goto step1
+endi
+if $mnode2Role != slave then
+  goto step1
+endi
+if $mnode3Role != slave then
+  goto step1
+endi
+
+$x = 1
+show2:
+
+print  =============== step1
+sql create database d1 replica 2 quorum 2
+sql create table d1.t1 (ts timestamp, i int)
+sql_error create table d1.t1 (ts timestamp, i int)
+sql insert into d1.t1 values(now, 1)
+sql select * from d1.t1;
+if $rows != 1 then
+  return -1
+endi
+
+print  =============== step2
+sql create database d2 replica 3 quorum 2
+sql create table d2.t1 (ts timestamp, i int)
+sql_error create table d2.t1 (ts timestamp, i int)
+sql insert into d2.t1 values(now, 1)
+sql select * from d2.t1;
+if $rows != 1 then
+  return -1
+endi
+
+print  =============== step3
+sql       create database d4 replica 1 quorum 1
+sql_error create database d5 replica 1 quorum 2
+sql_error create database d6 replica 1 quorum 3
+sql_error create database d7 replica 1 quorum 4
+sql_error create database d8 replica 1 quorum 0
+sql       create database d9 replica 2 quorum 1
+sql       create database d10 replica 2 quorum 2
+sql_error create database d11 replica 2 quorum 3
+sql_error create database d12 replica 2 quorum 4
+sql_error create database d12 replica 2 quorum 0
+sql       create database d13 replica 3 quorum 1
+sql       create database d14 replica 3 quorum 2
+sql_error create database d15 replica 3 quorum 3
+sql_error create database d16 replica 3 quorum 4
+sql_error create database d17 replica 3 quorum 0
+
+
+system sh/exec.sh -n dnode1 -s stop  -x SIGINT
+system sh/exec.sh -n dnode2 -s stop  -x SIGINT
+system sh/exec.sh -n dnode3 -s stop  -x SIGINT
+system sh/exec.sh -n dnode4 -s stop  -x SIGINT
diff --git a/tests/script/jenkins/basic.txt b/tests/script/jenkins/basic.txt
index 73996a67e9ef2c5b152b861506cadab189f168c5..90d01b7215cc559a3c543c5b46c80e1518a3acdb 100644
--- a/tests/script/jenkins/basic.txt
+++ b/tests/script/jenkins/basic.txt
@@ -1,6 +1,7 @@
 cd ../../../debug; cmake ..
 cd ../../../debug; make
 
+./test.sh -f issue/TD-2677.sim
 ./test.sh -f issue/TD-2680.sim
 ./test.sh -f issue/TD-2713.sim
 
diff --git a/tests/script/test.sh b/tests/script/test.sh
index a68ac4736dc8e7c0fa3b458c722ea58e4c9aec8e..1c7a7527abc90b3acc98fdf481b847258dfda489 100755
--- a/tests/script/test.sh
+++ b/tests/script/test.sh
@@ -113,7 +113,6 @@ echo "rpcDebugFlag       143"                     >> $TAOS_CFG
 echo "tmrDebugFlag       131"                     >> $TAOS_CFG
 echo "cDebugFlag         143"                     >> $TAOS_CFG
 echo "udebugFlag         143"                     >> $TAOS_CFG
-echo "tablemetakeeptimer 5"                       >> $TAOS_CFG
 echo "wal                0"                       >> $TAOS_CFG
 echo "asyncLog           0"                       >> $TAOS_CFG
 echo "locale             en_US.UTF-8"             >> $TAOS_CFG
diff --git a/tests/script/tmp/mnodes.sim b/tests/script/tmp/mnodes.sim
index e11140028d474b131c472d6c0ff0f9a56587e3a9..23f59d1d00c296d5fc9d3724ce428375a419938e 100644
--- a/tests/script/tmp/mnodes.sim
+++ b/tests/script/tmp/mnodes.sim
@@ -35,7 +35,6 @@ system sh/cfg.sh -n dnode3 -c replica -v 3
 print ============== deploy
 
 system sh/exec.sh -n dnode1 -s start 
-sleep 5001
 sql connect
 
 sql create dnode $hostname2
@@ -45,13 +44,29 @@ system sh/exec.sh -n dnode3 -s start
 
 print  =============== step1
 $x = 0
-show1: 
+step1: 
 	$x = $x + 1
-	sleep 2000
-	if $x == 5 then
-	  return -1
+	sleep 1000
+	if $x == 10 then
+		return -1
 	endi
-sql show mnodes -x show1
+
+sql show dnodes
+print dnode1 $data4_1
+print dnode2 $data4_2
+print dnode3 $data4_3
+
+if $data4_1 != ready then
+  goto step1
+endi
+if $data4_2 != ready then
+  goto step1
+endi
+if $data4_3 != ready then
+  goto step1
+endi
+
+sql show mnodes
 $mnode1Role = $data2_1
 print mnode1Role $mnode1Role
 $mnode2Role = $data2_2
@@ -60,13 +75,13 @@ $mnode3Role = $data2_3
 print mnode3Role $mnode3Role
 
 if $mnode1Role != master then
-  goto show1
+  goto step1
 endi
 if $mnode2Role != slave then
-  goto show1
+  goto step1
 endi
 if $mnode3Role != slave then
-  goto show1
+  goto step1
 endi
 
 $x = 1
@@ -75,9 +90,21 @@ show2:
 print  =============== step $x
 sql show mnodes
 print $data0_1 $data2_1
-print $data0_2 $data2_2
-print $data0_3 $data2_3
 
+sql show dnodes
+print dnode1 $data4_1
+print dnode2 $data4_2
+print dnode3 $data4_3
+
+if $data4_1 != ready then
+  goto step1
+endi
+if $data4_2 != ready then
+  goto step1
+endi
+if $data4_3 != ready then
+  goto step1
+endi
 
 $x = $x + 1
 sleep 5000
diff --git a/tests/script/unique/stream/metrics_balance.sim b/tests/script/unique/stream/metrics_balance.sim
index 36086fe4b85b0a6cbf9710af6104d697c1bb59dc..3cb0d73ab862178e5d648ddd1342e0b930e1f6a0 100644
--- a/tests/script/unique/stream/metrics_balance.sim
+++ b/tests/script/unique/stream/metrics_balance.sim
@@ -14,8 +14,6 @@ system sh/cfg.sh -n dnode1 -c mnodeEqualVnodeNum -v 0
 system sh/cfg.sh -n dnode2 -c mnodeEqualVnodeNum -v 0
 system sh/cfg.sh -n dnode1 -c maxTablesPerVnode -v 4
 system sh/cfg.sh -n dnode2 -c maxTablesPerVnode -v 4
-system sh/cfg.sh -n dnode1 -c tableMetaKeepTimer -v 5
-system sh/cfg.sh -n dnode2 -c tableMetaKeepTimer -v 5
 system sh/cfg.sh -n dnode1 -c numOfMnodes -v 2
 system sh/cfg.sh -n dnode2 -c numOfMnodes -v 2
 
diff --git a/tests/test/c/CMakeLists.txt b/tests/test/c/CMakeLists.txt
index 2eb8ee1614b286f3827705865cf073a7eded0c88..33e1528b70b5525da23723dc9bf6309870d172ee 100644
--- a/tests/test/c/CMakeLists.txt
+++ b/tests/test/c/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
+CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
 PROJECT(TDengine)
 
 INCLUDE_DIRECTORIES(${TD_COMMUNITY_DIR}/src/inc)