[TD-2984] <fix>: combine taosdemo and taosdemox. no need taos_init().

.gitignore

@@ -79,3 +79,15 @@ tests/comparisonTest/opentsdb/opentsdbtest/.settings/
 tests/examples/JDBC/JDBCDemo/.classpath
 tests/examples/JDBC/JDBCDemo/.project
 tests/examples/JDBC/JDBCDemo/.settings/
+
+# Emacs
+# -*- mode: gitignore; -*-
+*~
+\#*\#
+/.emacs.desktop
+/.emacs.desktop.lock
+*.elc
+auto-save-list
+tramp
+.\#*
+TAGS

Jenkinsfile

@@ -5,7 +5,7 @@ node {
     git url: 'https://github.com/taosdata/TDengine.git'
 }
 
-def kipstage=0
+def skipstage=0
 def abortPreviousBuilds() {
   def currentJobName = env.JOB_NAME
   def currentBuildNumber = env.BUILD_NUMBER.toInteger()
@@ -88,8 +88,9 @@ pipeline {
           git checkout -qf FETCH_HEAD
           '''
           script{
-            skipstage=sh(script:"git --no-pager diff --name-only FETCH_HEAD develop|grep -v -E '.*md|//src//connector|Jenkinsfile|test-all.sh' || echo 0 ",returnStdout:true) 
+            env.skipstage=sh(script:"cd ${WORKSPACE}.tes && git --no-pager diff --name-only FETCH_HEAD develop|grep -v -E '.*md|//src//connector|Jenkinsfile|test-all.sh' || echo 0 ",returnStdout:true) 
           }
+          println env.skipstage
           sh'''
           rm -rf ${WORKSPACE}.tes
           '''
@@ -101,7 +102,7 @@ pipeline {
         when {
               changeRequest()
                expression {
-                    skipstage != 0
+                    env.skipstage != 0
               }
           }
       parallel {

documentation20/cn/08.connector/docs.md

@@ -24,6 +24,7 @@ TDengine提供了丰富的应用程序开发接口，其中包括C/C++、Java、
 * 在没有安装TDengine服务端软件的系统中使用连接器（除RESTful外）访问 TDengine 数据库，需要安装相应版本的客户端安装包来使应用驱动（Linux系统中文件名为libtaos.so，Windows系统中为taos.dll）被安装在系统中，否则会产生无法找到相应库文件的错误。
 * 所有执行 SQL 语句的 API，例如 C/C++ Connector 中的 `tao_query`、`taos_query_a`、`taos_subscribe` 等，以及其它语言中与它们对应的API，每次都只能执行一条 SQL 语句，如果实际参数中包含了多条语句，它们的行为是未定义的。
 * 升级到TDengine到2.0.8.0版本的用户，必须更新JDBC连接TDengine必须升级taos-jdbcdriver到2.0.12及以上。
+* 无论选用何种编程语言的连接器，2.0 及以上版本的 TDengine 推荐数据库应用的每个线程都建立一个独立的连接，或基于线程建立连接池，以避免连接内的“USE statement”状态量在线程之间相互干扰（但连接的查询和写入操作都是线程安全的）。
 
 ## <a class="anchor" id="driver"></a>安装连接器驱动步骤
 
@@ -238,13 +239,13 @@ C/C++的API类似于MySQL的C API。应用程序使用时，需要包含TDengine
 
   获取查询结果集每列数据的属性（数据类型、名字、字节数），与taos_num_fileds配合使用，可用来解析`taos_fetch_row`返回的一个元组(一行)的数据。 `TAOS_FIELD` 的结构如下：
 
-  ```c
-  typedef struct taosField {
-    char     name[65];  // 列名
-    uint8_t  type;      // 数据类型
-    int16_t  bytes;     // 字节数
-  } TAOS_FIELD;
-  ```
+```c
+typedef struct taosField {
+  char     name[65];  // 列名
+  uint8_t  type;      // 数据类型
+  int16_t  bytes;     // 字节数
+} TAOS_FIELD;
+```
 
 - `void taos_stop_query(TAOS_RES *res)`
 
@@ -266,7 +267,7 @@ C/C++的API类似于MySQL的C API。应用程序使用时，需要包含TDengine
 
 ### 异步查询API
 
-同步API之外，TDengine还提供性能更高的异步调用API处理数据插入、查询操作。在软硬件环境相同的情况下，异步API处理数据插入的速度比同步API快2\~4倍。异步API采用非阻塞式的调用方式，在系统真正完成某个具体数据库操作前，立即返回。调用的线程可以去处理其他工作，从而可以提升整个应用的性能。异步API在网络延迟严重的情况下，优点尤为突出。
+同步API之外，TDengine还提供性能更高的异步调用API处理数据插入、查询操作。在软硬件环境相同的情况下，异步API处理数据插入的速度比同步API快2～4倍。异步API采用非阻塞式的调用方式，在系统真正完成某个具体数据库操作前，立即返回。调用的线程可以去处理其他工作，从而可以提升整个应用的性能。异步API在网络延迟严重的情况下，优点尤为突出。
 
 异步API都需要应用提供相应的回调函数，回调函数参数设置如下：前两个参数都是一致的，第三个参数依不同的API而定。第一个参数param是应用调用异步API时提供给系统的，用于回调时，应用能够找回具体操作的上下文，依具体实现而定。第二个参数是SQL操作的结果集，如果为空，比如insert操作，表示没有记录返回，如果不为空，比如select操作，表示有记录返回。
 
@@ -896,7 +897,7 @@ Node-example-raw.js
 
 验证方法：
 
-1. 新建安装验证目录，例如：\~/tdengine-test，拷贝github上nodejsChecker.js源程序。下载地址：（https://github.com/taosdata/TDengine/tree/develop/tests/examples/nodejs/nodejsChecker.js）。
+1. 新建安装验证目录，例如：`~/tdengine-test`，拷贝github上nodejsChecker.js源程序。下载地址：（https://github.com/taosdata/TDengine/tree/develop/tests/examples/nodejs/nodejsChecker.js）。
 
 2. 在命令中执行以下命令：
 

documentation20/cn/11.administrator/docs.md

@@ -102,7 +102,7 @@ taosd -C
 - maxSQLLength：单条SQL语句允许最长限制。默认值：65380字节。
 - telemetryReporting: 是否允许 TDengine 采集和上报基本使用信息，0表示不允许，1表示允许。 默认值：1。
 - stream: 是否启用连续查询（流计算功能），0表示不允许，1表示允许。 默认值：1。
-- queryBufferSize: 为所有并发查询占用保留的内存大小。计算规则可以根据实际应用可能的最大并发数和表的数字相乘，再乘 170 。单位为字节。
+- queryBufferSize: 为所有并发查询占用保留的内存大小。计算规则可以根据实际应用可能的最大并发数和表的数字相乘，再乘 170 。单位为 MB（2.0.15 以前的版本中，此参数的单位是字节）。
 - ratioOfQueryCores: 设置查询线程的最大数量。最小值0 表示只有1个查询线程；最大值2表示最大建立2倍CPU核数的查询线程。默认为1，表示最大和CPU核数相等的查询线程。该值可以为小数，即0.5表示最大建立CPU核数一半的查询线程。
 
 **注意：**对于端口，TDengine会使用从serverPort起13个连续的TCP和UDP端口号，请务必在防火墙打开。因此如果是缺省配置，需要打开从6030到6042共13个端口，而且必须TCP和UDP都打开。

documentation20/cn/12.taos-sql/docs.md

@@ -267,6 +267,7 @@ TDengine缺省的时间戳是毫秒精度，但通过修改配置参数enableMic
     ```
 
 ## <a class="anchor" id="tags"></a>超级表 STable 中 TAG 管理
+
 - **添加标签**
 
     ```mysql

documentation20/cn/13.faq/docs.md

@@ -140,3 +140,20 @@ TDengine是根据hostname唯一标志一台机器的，在数据文件从机器A
 - 2.0.7.0 及以后的版本，到/var/lib/taos/dnode下，修复dnodeEps.json的dnodeId对应的FQDN，重启。确保机器内所有机器的此文件是完全相同的。
 - 1.x 和 2.x 版本的存储结构不兼容，需要使用迁移工具或者自己开发应用导出导入数据。
 
+## 17. 如何在命令行程序 taos 中临时调整日志级别
+
+为了调试方便，从 2.0.16 版本开始，命令行程序 taos 新增了与日志记录相关的两条指令：
+
+```mysql
+ALTER LOCAL flag_name flag_value;
+```
+
+其含义是，在当前的命令行程序下，修改一个特定模块的日志记录级别（只对当前命令行程序有效，如果 taos 命令行程序重启，则需要重新设置）：
+- flag_name 的取值可以是：debugFlag，cDebugFlag，tmrDebugFlag，uDebugFlag，rpcDebugFlag
+- flag_value 的取值可以是：131（输出错误和警告日志），135（ 输出错误、警告和调试日志），143（ 输出错误、警告、调试和跟踪日志）
+
+```mysql
+ALTER LOCAL RESETLOG;
+```
+
+其含义是，清空本机所有由客户端生成的日志文件。

packaging/docker/dockerManifest.sh

@@ -35,10 +35,11 @@ done
 
 echo "verNumber=${verNumber}"
 
-docker manifest create -a tdengine/tdengine:${verNumber} tdengine/tdengine-amd64:${verNumber} tdengine/tdengine-aarch64:${verNumber} tdengine/tdengine-aarch32:${verNumber}
+#docker manifest create -a tdengine/tdengine:${verNumber} tdengine/tdengine-amd64:${verNumber} tdengine/tdengine-aarch64:${verNumber} tdengine/tdengine-aarch32:${verNumber}
+docker manifest create -a tdengine/tdengine tdengine/tdengine-amd64:latest tdengine/tdengine-aarch64:latest tdengine/tdengine-aarch32:latest
 
 docker login -u tdengine -p ${passWord}  #replace the docker registry username and password
 
-docker manifest push tdengine/tdengine:${verNumber}
+docker manifest push tdengine/tdengine
 
 # how set latest version ???

packaging/rpm/tdengine.spec

@@ -9,6 +9,7 @@ Summary:	tdengine from taosdata
 Group:	  Application/Database
 License:	AGPL
 URL:		  www.taosdata.com
+AutoReqProv: no
 
 #BuildRoot:  %_topdir/BUILDROOT
 BuildRoot:   %{_tmppath}/%{name}-%{version}-%{release}-root 

src/client/src/tscSQLParser.c

@@ -6375,16 +6375,14 @@ int32_t doCheckForCreateFromStable(SSqlObj* pSql, SSqlInfo* pInfo) {
     // get table meta from mnode
     code = tNameExtractFullName(&pStableMetaInfo->name, pCreateTableInfo->tagdata.name);
 
-    SArray* pList = pCreateTableInfo->pTagVals;
+    SArray* pValList = pCreateTableInfo->pTagVals;
     code = tscGetTableMeta(pSql, pStableMetaInfo);
     if (code != TSDB_CODE_SUCCESS) {
       return code;
     }
 
-    size_t size = taosArrayGetSize(pList);
-    if (tscGetNumOfTags(pStableMetaInfo->pTableMeta) != size) {
-      return invalidSqlErrMsg(tscGetErrorMsgPayload(pCmd), msg5);
-    }
+    size_t valSize = taosArrayGetSize(pValList);
+
 
     // too long tag values will return invalid sql, not be truncated automatically
     SSchema  *pTagSchema = tscGetTableTagSchema(pStableMetaInfo->pTableMeta);
@@ -6395,36 +6393,111 @@ int32_t doCheckForCreateFromStable(SSqlObj* pSql, SSqlInfo* pInfo) {
       return TSDB_CODE_TSC_OUT_OF_MEMORY;
     }
 
+
+    SArray* pNameList = NULL;
+    size_t nameSize = 0;
+    int32_t schemaSize = tscGetNumOfTags(pStableMetaInfo->pTableMeta);
     int32_t ret = TSDB_CODE_SUCCESS;
-    for (int32_t i = 0; i < size; ++i) {
-      SSchema*          pSchema = &pTagSchema[i];
-      tVariantListItem* pItem = taosArrayGet(pList, i);
 
-      char tagVal[TSDB_MAX_TAGS_LEN];
-      if (pSchema->type == TSDB_DATA_TYPE_BINARY || pSchema->type == TSDB_DATA_TYPE_NCHAR) {
-        if (pItem->pVar.nLen > pSchema->bytes) {
-          tdDestroyKVRowBuilder(&kvRowBuilder);
-          return invalidSqlErrMsg(tscGetErrorMsgPayload(pCmd), msg3);
+    if (pCreateTableInfo->pTagNames) {
+      pNameList = pCreateTableInfo->pTagNames;
+      nameSize = taosArrayGetSize(pNameList);
+
+      if (valSize != nameSize) {
+        return invalidSqlErrMsg(tscGetErrorMsgPayload(pCmd), msg5);
+      }
+
+      if (schemaSize < valSize) {
+        return invalidSqlErrMsg(tscGetErrorMsgPayload(pCmd), msg5);
+      }
+
+      bool findColumnIndex = false;
+
+      for (int32_t i = 0; i < nameSize; ++i) {
+        SStrToken* sToken = taosArrayGet(pNameList, i);
+        if (TK_STRING == sToken->type) {
+          tscDequoteAndTrimToken(sToken);
         }
-      }
 
-      ret = tVariantDump(&(pItem->pVar), tagVal, pSchema->type, true);
+        tVariantListItem* pItem = taosArrayGet(pValList, i);
 
-      // check again after the convert since it may be converted from binary to nchar.
-      if (pSchema->type == TSDB_DATA_TYPE_BINARY || pSchema->type == TSDB_DATA_TYPE_NCHAR) {
-        int16_t len = varDataTLen(tagVal);
-        if (len > pSchema->bytes) {
-          tdDestroyKVRowBuilder(&kvRowBuilder);
-          return invalidSqlErrMsg(tscGetErrorMsgPayload(pCmd), msg3);
+        findColumnIndex = false;
+      
+        // todo speedup by using hash list
+        for (int32_t t = 0; t < schemaSize; ++t) {
+          if (strncmp(sToken->z, pTagSchema[t].name, sToken->n) == 0 && strlen(pTagSchema[t].name) == sToken->n) {
+            SSchema*          pSchema = &pTagSchema[t];
+            
+            char tagVal[TSDB_MAX_TAGS_LEN];
+            if (pSchema->type == TSDB_DATA_TYPE_BINARY || pSchema->type == TSDB_DATA_TYPE_NCHAR) {
+              if (pItem->pVar.nLen > pSchema->bytes) {
+                tdDestroyKVRowBuilder(&kvRowBuilder);
+                return invalidSqlErrMsg(tscGetErrorMsgPayload(pCmd), msg3);
+              }
+            }
+            
+            ret = tVariantDump(&(pItem->pVar), tagVal, pSchema->type, true);
+            
+            // check again after the convert since it may be converted from binary to nchar.
+            if (pSchema->type == TSDB_DATA_TYPE_BINARY || pSchema->type == TSDB_DATA_TYPE_NCHAR) {
+              int16_t len = varDataTLen(tagVal);
+              if (len > pSchema->bytes) {
+                tdDestroyKVRowBuilder(&kvRowBuilder);
+                return invalidSqlErrMsg(tscGetErrorMsgPayload(pCmd), msg3);
+              }
+            }
+            
+            if (ret != TSDB_CODE_SUCCESS) {
+              tdDestroyKVRowBuilder(&kvRowBuilder);
+              return invalidSqlErrMsg(tscGetErrorMsgPayload(pCmd), msg4);
+            }
+            
+            tdAddColToKVRow(&kvRowBuilder, pSchema->colId, pSchema->type, tagVal);
+
+            findColumnIndex = true;
+            break;
+          }
         }
+
+        if (!findColumnIndex) {
+          return tscInvalidSQLErrMsg(pCmd->payload, "invalid tag name", sToken->z);
+        }   
+      }
+    } else {
+      if (schemaSize != valSize) {
+        return invalidSqlErrMsg(tscGetErrorMsgPayload(pCmd), msg5);
       }
 
-      if (ret != TSDB_CODE_SUCCESS) {
-        tdDestroyKVRowBuilder(&kvRowBuilder);
-        return invalidSqlErrMsg(tscGetErrorMsgPayload(pCmd), msg4);
+      for (int32_t i = 0; i < valSize; ++i) {
+        SSchema*          pSchema = &pTagSchema[i];
+        tVariantListItem* pItem = taosArrayGet(pValList, i);
+      
+        char tagVal[TSDB_MAX_TAGS_LEN];
+        if (pSchema->type == TSDB_DATA_TYPE_BINARY || pSchema->type == TSDB_DATA_TYPE_NCHAR) {
+          if (pItem->pVar.nLen > pSchema->bytes) {
+            tdDestroyKVRowBuilder(&kvRowBuilder);
+            return invalidSqlErrMsg(tscGetErrorMsgPayload(pCmd), msg3);
+          }
+        }
+      
+        ret = tVariantDump(&(pItem->pVar), tagVal, pSchema->type, true);
+      
+        // check again after the convert since it may be converted from binary to nchar.
+        if (pSchema->type == TSDB_DATA_TYPE_BINARY || pSchema->type == TSDB_DATA_TYPE_NCHAR) {
+          int16_t len = varDataTLen(tagVal);
+          if (len > pSchema->bytes) {
+            tdDestroyKVRowBuilder(&kvRowBuilder);
+            return invalidSqlErrMsg(tscGetErrorMsgPayload(pCmd), msg3);
+          }
+        }
+      
+        if (ret != TSDB_CODE_SUCCESS) {
+          tdDestroyKVRowBuilder(&kvRowBuilder);
+          return invalidSqlErrMsg(tscGetErrorMsgPayload(pCmd), msg4);
+        }
+      
+        tdAddColToKVRow(&kvRowBuilder, pSchema->colId, pSchema->type, tagVal);
       }
-
-      tdAddColToKVRow(&kvRowBuilder, pSchema->colId, pSchema->type, tagVal);
     }
 
     SKVRow row = tdGetKVRowFromBuilder(&kvRowBuilder);

src/client/src/tscSql.c

@@ -52,7 +52,9 @@ static bool validPassword(const char* passwd) {
 
 static SSqlObj *taosConnectImpl(const char *ip, const char *user, const char *pass, const char *auth, const char *db,
                          uint16_t port, void (*fp)(void *, TAOS_RES *, int), void *param, TAOS **taos) {
-  taos_init();
+  if (taos_init()) {
+    return NULL;
+  }
 
   if (!validUserName(user)) {
     terrno = TSDB_CODE_TSC_INVALID_USER_LENGTH;

src/client/src/tscSystem.c

@@ -47,6 +47,7 @@ void      *tscRpcCache;            // cache to keep rpc obj
 int32_t   tscNumOfThreads = 1;     // num of rpc threads  
 static    pthread_mutex_t rpcObjMutex; // mutex to protect open the rpc obj concurrently 
 static pthread_once_t tscinit = PTHREAD_ONCE_INIT;
+static volatile int tscInitRes = 0;
 
 void tscCheckDiskUsage(void *UNUSED_PARAM(para), void *UNUSED_PARAM(param)) {
   taosGetDisk();
@@ -137,7 +138,11 @@ void taos_init_imp(void) {
     }
 
     taosReadGlobalCfg();
-    taosCheckGlobalCfg();
+    if (taosCheckGlobalCfg()) {
+      tscInitRes = -1;
+      return;
+    }
+    
     taosInitNotes();
 
     rpcInit();
@@ -159,6 +164,7 @@ void taos_init_imp(void) {
   tscQhandle = taosInitScheduler(queueSize, tscNumOfThreads, "tsc");
   if (NULL == tscQhandle) {
     tscError("failed to init scheduler");
+    tscInitRes = -1;
     return;
   }
 
@@ -187,7 +193,7 @@ void taos_init_imp(void) {
   tscDebug("client is initialized successfully");
 }
 
-void taos_init() { pthread_once(&tscinit, taos_init_imp); }
+int taos_init() {     pthread_once(&tscinit, taos_init_imp);  return tscInitRes;}
 
 // this function may be called by user or system, or by both simultaneously.
 void taos_cleanup(void) {

src/common/src/tglobal.c

@@ -373,6 +373,23 @@ static void taosCheckDataDirCfg() {
   }
 }
 
+static int32_t taosCheckTmpDir(void) {
+  if (strlen(tsTempDir) <= 0){
+    uError("tempDir is not set");
+    return -1;
+  }
+
+  DIR *dir = opendir(tsTempDir);
+  if (dir == NULL) {
+    uError("can not open tempDir:%s, error:%s", tsTempDir, strerror(errno));
+    return -1;
+  }
+
+  closedir(dir);
+
+  return 0;
+}
+
 static void doInitGlobalConfig(void) {
   osInit();
   srand(taosSafeRand());
@@ -1488,6 +1505,11 @@ int32_t taosCheckGlobalCfg() {
   }
 
   taosCheckDataDirCfg();
+
+  if (taosCheckTmpDir()) {
+    return -1;
+  }
+  
   taosGetSystemInfo();
 
   tsSetLocale();

src/connector/python/linux/python2/setup.py

@@ -5,7 +5,7 @@ with open("README.md", "r") as fh:
 
 setuptools.setup(
     name="taos",
-    version="2.0.5",
+    version="2.0.6",
     author="Taosdata Inc.",
     author_email="support@taosdata.com",
     description="TDengine python client package",

src/connector/python/linux/python2/taos/__init__.py

@@ -3,12 +3,12 @@ from .connection import TDengineConnection
 from .cursor import TDengineCursor
 
 # Globals
-apilevel = '2.0.3'
 threadsafety = 0
 paramstyle = 'pyformat'
 
 __all__ = ['connection', 'cursor']
 
+
 def connect(*args, **kwargs):
     """ Function to return a TDengine connector object
 
@@ -21,4 +21,4 @@ def connect(*args, **kwargs):
 
     @rtype: TDengineConnector
     """
-    return TDengineConnection(*args, **kwargs)
+    return TDengineConnection(*args, **kwargs)

src/connector/python/linux/python2/taos/cinterface.py

@@ -4,11 +4,14 @@ from .error import *
 import math
 import datetime
 
+
 def _convert_millisecond_to_datetime(milli):
-    return datetime.datetime.fromtimestamp(milli/1000.0)
+    return datetime.datetime.fromtimestamp(milli / 1000.0)
+
 
 def _convert_microsecond_to_datetime(micro):
-    return datetime.datetime.fromtimestamp(micro/1000000.0)
+    return datetime.datetime.fromtimestamp(micro / 1000000.0)
+
 
 def _crow_timestamp_to_python(data, num_of_rows, nbytes=None, micro=False):
     """Function to convert C bool row to python row
@@ -18,168 +21,309 @@ def _crow_timestamp_to_python(data, num_of_rows, nbytes=None, micro=False):
         _timestamp_converter = _convert_microsecond_to_datetime
 
     if num_of_rows > 0:
-        return list(map(_timestamp_converter, ctypes.cast(data,  ctypes.POINTER(ctypes.c_long))[:abs(num_of_rows)]))
+        return list(map(_timestamp_converter, ctypes.cast(
+            data, ctypes.POINTER(ctypes.c_long))[:abs(num_of_rows)]))
     else:
-        return list(map(_timestamp_converter, ctypes.cast(data,  ctypes.POINTER(ctypes.c_long))[:abs(num_of_rows)]))
+        return list(map(_timestamp_converter, ctypes.cast(
+            data, ctypes.POINTER(ctypes.c_long))[:abs(num_of_rows)]))
+
 
 def _crow_bool_to_python(data, num_of_rows, nbytes=None, micro=False):
     """Function to convert C bool row to python row
     """
     if num_of_rows > 0:
-        return [ None if ele == FieldType.C_BOOL_NULL else bool(ele) for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_byte))[:abs(num_of_rows)] ]
+        return [
+            None if ele == FieldType.C_BOOL_NULL else bool(ele) for ele in ctypes.cast(
+                data, ctypes.POINTER(
+                    ctypes.c_byte))[
+                :abs(num_of_rows)]]
     else:
-        return [ None if ele == FieldType.C_BOOL_NULL else bool(ele) for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_bool))[:abs(num_of_rows)] ]
+        return [
+            None if ele == FieldType.C_BOOL_NULL else bool(ele) for ele in ctypes.cast(
+                data, ctypes.POINTER(
+                    ctypes.c_bool))[
+                :abs(num_of_rows)]]
+
 
 def _crow_tinyint_to_python(data, num_of_rows, nbytes=None, micro=False):
     """Function to convert C tinyint row to python row
     """
     if num_of_rows > 0:
-        return [ None if ele == FieldType.C_TINYINT_NULL else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_byte))[:abs(num_of_rows)] ]
+        return [None if ele == FieldType.C_TINYINT_NULL else ele for ele in ctypes.cast(
+            data, ctypes.POINTER(ctypes.c_byte))[:abs(num_of_rows)]]
     else:
-        return [ None if ele == FieldType.C_TINYINT_NULL else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_byte))[:abs(num_of_rows)] ]
-    
+        return [None if ele == FieldType.C_TINYINT_NULL else ele for ele in ctypes.cast(
+            data, ctypes.POINTER(ctypes.c_byte))[:abs(num_of_rows)]]
+
+
+def _crow_tinyint_unsigned_to_python(
+        data,
+        num_of_rows,
+        nbytes=None,
+        micro=False):
+    """Function to convert C tinyint row to python row
+    """
+    if num_of_rows > 0:
+        return [
+            None if ele == FieldType.C_TINYINT_UNSIGNED_NULL else ele for ele in ctypes.cast(
+                data, ctypes.POINTER(
+                    ctypes.c_byte))[
+                :abs(num_of_rows)]]
+    else:
+        return [
+            None if ele == FieldType.C_TINYINT_UNSIGNED_NULL else ele for ele in ctypes.cast(
+                data, ctypes.POINTER(
+                    ctypes.c_byte))[
+                :abs(num_of_rows)]]
+
+
 def _crow_smallint_to_python(data, num_of_rows, nbytes=None, micro=False):
     """Function to convert C smallint row to python row
     """
     if num_of_rows > 0:
-        return [ None if ele == FieldType.C_SMALLINT_NULL else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_short))[:abs(num_of_rows)]]
+        return [
+            None if ele == FieldType.C_SMALLINT_NULL else ele for ele in ctypes.cast(
+                data, ctypes.POINTER(
+                    ctypes.c_short))[
+                :abs(num_of_rows)]]
     else:
-        return [ None if ele == FieldType.C_SMALLINT_NULL else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_short))[:abs(num_of_rows)] ]
+        return [
+            None if ele == FieldType.C_SMALLINT_NULL else ele for ele in ctypes.cast(
+                data, ctypes.POINTER(
+                    ctypes.c_short))[
+                :abs(num_of_rows)]]
+
+
+def _crow_smallint_unsigned_to_python(
+        data, num_of_rows, nbytes=None, micro=False):
+    """Function to convert C smallint row to python row
+    """
+    if num_of_rows > 0:
+        return [
+            None if ele == FieldType.C_SMALLINT_UNSIGNED_NULL else ele for ele in ctypes.cast(
+                data, ctypes.POINTER(
+                    ctypes.c_short))[
+                :abs(num_of_rows)]]
+    else:
+        return [
+            None if ele == FieldType.C_SMALLINT_UNSIGNED_NULL else ele for ele in ctypes.cast(
+                data, ctypes.POINTER(
+                    ctypes.c_short))[
+                :abs(num_of_rows)]]
+
 
 def _crow_int_to_python(data, num_of_rows, nbytes=None, micro=False):
     """Function to convert C int row to python row
     """
     if num_of_rows > 0:
-        return [ None if ele == FieldType.C_INT_NULL else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_int))[:abs(num_of_rows)] ]
+        return [None if ele == FieldType.C_INT_NULL else ele for ele in ctypes.cast(
+            data, ctypes.POINTER(ctypes.c_int))[:abs(num_of_rows)]]
     else:
-        return [ None if ele == FieldType.C_INT_NULL else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_int))[:abs(num_of_rows)] ]
+        return [None if ele == FieldType.C_INT_NULL else ele for ele in ctypes.cast(
+            data, ctypes.POINTER(ctypes.c_int))[:abs(num_of_rows)]]
+
+
+def _crow_int_unsigned_to_python(data, num_of_rows, nbytes=None, micro=False):
+    """Function to convert C int row to python row
+    """
+    if num_of_rows > 0:
+        return [
+            None if ele == FieldType.C_INT_UNSIGNED_NULL else ele for ele in ctypes.cast(
+                data, ctypes.POINTER(
+                    ctypes.c_int))[
+                :abs(num_of_rows)]]
+    else:
+        return [
+            None if ele == FieldType.C_INT_UNSIGNED_NULL else ele for ele in ctypes.cast(
+                data, ctypes.POINTER(
+                    ctypes.c_int))[
+                :abs(num_of_rows)]]
+
 
 def _crow_bigint_to_python(data, num_of_rows, nbytes=None, micro=False):
     """Function to convert C bigint row to python row
     """
     if num_of_rows > 0:
-        return [ None if ele == FieldType.C_BIGINT_NULL else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_long))[:abs(num_of_rows)] ]
+        return [None if ele == FieldType.C_BIGINT_NULL else ele for ele in ctypes.cast(
+            data, ctypes.POINTER(ctypes.c_long))[:abs(num_of_rows)]]
     else:
-        return [ None if ele == FieldType.C_BIGINT_NULL else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_long))[:abs(num_of_rows)] ]
+        return [None if ele == FieldType.C_BIGINT_NULL else ele for ele in ctypes.cast(
+            data, ctypes.POINTER(ctypes.c_long))[:abs(num_of_rows)]]
+
+
+def _crow_bigint_unsigned_to_python(
+        data,
+        num_of_rows,
+        nbytes=None,
+        micro=False):
+    """Function to convert C bigint row to python row
+    """
+    if num_of_rows > 0:
+        return [
+            None if ele == FieldType.C_BIGINT_UNSIGNED_NULL else ele for ele in ctypes.cast(
+                data, ctypes.POINTER(
+                    ctypes.c_long))[
+                :abs(num_of_rows)]]
+    else:
+        return [
+            None if ele == FieldType.C_BIGINT_UNSIGNED_NULL else ele for ele in ctypes.cast(
+                data, ctypes.POINTER(
+                    ctypes.c_long))[
+                :abs(num_of_rows)]]
+
 
 def _crow_float_to_python(data, num_of_rows, nbytes=None, micro=False):
     """Function to convert C float row to python row
     """
     if num_of_rows > 0:
-        return [ None if math.isnan(ele) else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_float))[:abs(num_of_rows)] ]
+        return [None if math.isnan(ele) else ele for ele in ctypes.cast(
+            data, ctypes.POINTER(ctypes.c_float))[:abs(num_of_rows)]]
     else:
-        return [ None if math.isnan(ele) else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_float))[:abs(num_of_rows)] ]
+        return [None if math.isnan(ele) else ele for ele in ctypes.cast(
+            data, ctypes.POINTER(ctypes.c_float))[:abs(num_of_rows)]]
+
 
 def _crow_double_to_python(data, num_of_rows, nbytes=None, micro=False):
     """Function to convert C double row to python row
     """
     if num_of_rows > 0:
-        return [ None if math.isnan(ele) else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_double))[:abs(num_of_rows)] ]
+        return [None if math.isnan(ele) else ele for ele in ctypes.cast(
+            data, ctypes.POINTER(ctypes.c_double))[:abs(num_of_rows)]]
     else:
-        return [ None if math.isnan(ele) else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_double))[:abs(num_of_rows)] ]
+        return [None if math.isnan(ele) else ele for ele in ctypes.cast(
+            data, ctypes.POINTER(ctypes.c_double))[:abs(num_of_rows)]]
+
 
 def _crow_binary_to_python(data, num_of_rows, nbytes=None, micro=False):
     """Function to convert C binary row to python row
     """
     assert(nbytes is not None)
     if num_of_rows > 0:
-        return [ None if ele.value[0:1] == FieldType.C_BINARY_NULL else ele.value.decode('utf-8') for ele in (ctypes.cast(data,  ctypes.POINTER(ctypes.c_char * nbytes)))[:abs(num_of_rows)]]
+        return [None if ele.value[0:1] == FieldType.C_BINARY_NULL else ele.value.decode(
+            'utf-8') for ele in (ctypes.cast(data, ctypes.POINTER(ctypes.c_char * nbytes)))[:abs(num_of_rows)]]
     else:
-        return [ None if ele.value[0:1] == FieldType.C_BINARY_NULL else ele.value.decode('utf-8') for ele in (ctypes.cast(data,  ctypes.POINTER(ctypes.c_char * nbytes)))[:abs(num_of_rows)]]
+        return [None if ele.value[0:1] == FieldType.C_BINARY_NULL else ele.value.decode(
+            'utf-8') for ele in (ctypes.cast(data, ctypes.POINTER(ctypes.c_char * nbytes)))[:abs(num_of_rows)]]
+
 
 def _crow_nchar_to_python(data, num_of_rows, nbytes=None, micro=False):
     """Function to convert C nchar row to python row
     """
     assert(nbytes is not None)
-    res=[]
+    res = []
     for i in range(abs(num_of_rows)):
         try:
             if num_of_rows >= 0:
                 tmpstr = ctypes.c_char_p(data)
-                res.append( tmpstr.value.decode() )
+                res.append(tmpstr.value.decode())
             else:
-                res.append( (ctypes.cast(data+nbytes*i,  ctypes.POINTER(ctypes.c_wchar * (nbytes//4))))[0].value )
+                res.append((ctypes.cast(data + nbytes * i,
+                                        ctypes.POINTER(ctypes.c_wchar * (nbytes // 4))))[0].value)
         except ValueError:
             res.append(None)
 
-    return res 
+    return res
+
 
 def _crow_binary_to_python_block(data, num_of_rows, nbytes=None, micro=False):
     """Function to convert C binary row to python row
     """
     assert(nbytes is not None)
-    res=[]
+    res = []
     if num_of_rows > 0:
         for i in range(abs(num_of_rows)):
             try:
-                rbyte=ctypes.cast(data+nbytes*i,ctypes.POINTER(ctypes.c_short))[:1].pop()
-                tmpstr = ctypes.c_char_p(data+nbytes*i+2)
-                res.append( tmpstr.value.decode()[0:rbyte] )
+                rbyte = ctypes.cast(
+                    data + nbytes * i,
+                    ctypes.POINTER(
+                        ctypes.c_short))[
+                    :1].pop()
+                tmpstr = ctypes.c_char_p(data + nbytes * i + 2)
+                res.append(tmpstr.value.decode()[0:rbyte])
             except ValueError:
                 res.append(None)
     else:
         for i in range(abs(num_of_rows)):
             try:
-                rbyte=ctypes.cast(data+nbytes*i,ctypes.POINTER(ctypes.c_short))[:1].pop()
-                tmpstr = ctypes.c_char_p(data+nbytes*i+2)
-                res.append( tmpstr.value.decode()[0:rbyte] )
+                rbyte = ctypes.cast(
+                    data + nbytes * i,
+                    ctypes.POINTER(
+                        ctypes.c_short))[
+                    :1].pop()
+                tmpstr = ctypes.c_char_p(data + nbytes * i + 2)
+                res.append(tmpstr.value.decode()[0:rbyte])
             except ValueError:
                 res.append(None)
     return res
 
+
 def _crow_nchar_to_python_block(data, num_of_rows, nbytes=None, micro=False):
     """Function to convert C nchar row to python row
     """
     assert(nbytes is not None)
-    res=[]
+    res = []
     if num_of_rows >= 0:
         for i in range(abs(num_of_rows)):
             try:
-                tmpstr = ctypes.c_char_p(data+nbytes*i+2)
-                res.append( tmpstr.value.decode() )
+                tmpstr = ctypes.c_char_p(data + nbytes * i + 2)
+                res.append(tmpstr.value.decode())
             except ValueError:
                 res.append(None)
     else:
         for i in range(abs(num_of_rows)):
             try:
-                res.append( (ctypes.cast(data+nbytes*i+2,  ctypes.POINTER(ctypes.c_wchar * (nbytes//4))))[0].value )
+                res.append((ctypes.cast(data + nbytes * i + 2,
+                                        ctypes.POINTER(ctypes.c_wchar * (nbytes // 4))))[0].value)
             except ValueError:
                 res.append(None)
     return res
 
+
 _CONVERT_FUNC = {
     FieldType.C_BOOL: _crow_bool_to_python,
-    FieldType.C_TINYINT : _crow_tinyint_to_python,
-    FieldType.C_SMALLINT : _crow_smallint_to_python,
-    FieldType.C_INT : _crow_int_to_python,
-    FieldType.C_BIGINT : _crow_bigint_to_python,
-    FieldType.C_FLOAT : _crow_float_to_python,
-    FieldType.C_DOUBLE : _crow_double_to_python,
+    FieldType.C_TINYINT: _crow_tinyint_to_python,
+    FieldType.C_SMALLINT: _crow_smallint_to_python,
+    FieldType.C_INT: _crow_int_to_python,
+    FieldType.C_BIGINT: _crow_bigint_to_python,
+    FieldType.C_FLOAT: _crow_float_to_python,
+    FieldType.C_DOUBLE: _crow_double_to_python,
     FieldType.C_BINARY: _crow_binary_to_python,
-    FieldType.C_TIMESTAMP : _crow_timestamp_to_python, 
-    FieldType.C_NCHAR : _crow_nchar_to_python
+    FieldType.C_TIMESTAMP: _crow_timestamp_to_python,
+    FieldType.C_NCHAR: _crow_nchar_to_python,
+    FieldType.C_TINYINT_UNSIGNED: _crow_tinyint_unsigned_to_python,
+    FieldType.C_SMALLINT_UNSIGNED: _crow_smallint_unsigned_to_python,
+    FieldType.C_INT_UNSIGNED: _crow_int_unsigned_to_python,
+    FieldType.C_BIGINT_UNSIGNED: _crow_bigint_unsigned_to_python
 }
 
 _CONVERT_FUNC_BLOCK = {
     FieldType.C_BOOL: _crow_bool_to_python,
-    FieldType.C_TINYINT : _crow_tinyint_to_python,
-    FieldType.C_SMALLINT : _crow_smallint_to_python,
-    FieldType.C_INT : _crow_int_to_python,
-    FieldType.C_BIGINT : _crow_bigint_to_python,
-    FieldType.C_FLOAT : _crow_float_to_python,
-    FieldType.C_DOUBLE : _crow_double_to_python,
+    FieldType.C_TINYINT: _crow_tinyint_to_python,
+    FieldType.C_SMALLINT: _crow_smallint_to_python,
+    FieldType.C_INT: _crow_int_to_python,
+    FieldType.C_BIGINT: _crow_bigint_to_python,
+    FieldType.C_FLOAT: _crow_float_to_python,
+    FieldType.C_DOUBLE: _crow_double_to_python,
     FieldType.C_BINARY: _crow_binary_to_python_block,
-    FieldType.C_TIMESTAMP : _crow_timestamp_to_python, 
-    FieldType.C_NCHAR : _crow_nchar_to_python_block
+    FieldType.C_TIMESTAMP: _crow_timestamp_to_python,
+    FieldType.C_NCHAR: _crow_nchar_to_python_block,
+    FieldType.C_TINYINT_UNSIGNED: _crow_tinyint_unsigned_to_python,
+    FieldType.C_SMALLINT_UNSIGNED: _crow_smallint_unsigned_to_python,
+    FieldType.C_INT_UNSIGNED: _crow_int_unsigned_to_python,
+    FieldType.C_BIGINT_UNSIGNED: _crow_bigint_unsigned_to_python
 }
 
 # Corresponding TAOS_FIELD structure in C
+
+
 class TaosField(ctypes.Structure):
     _fields_ = [('name', ctypes.c_char * 65),
                 ('type', ctypes.c_char),
                 ('bytes', ctypes.c_short)]
 
 # C interface class
+
+
 class CTaosInterface(object):
 
     libtaos = ctypes.CDLL('libtaos.so')
@@ -216,7 +360,7 @@ class CTaosInterface(object):
             except AttributeError:
                 raise AttributeError("config is expected as a str")
 
-        if config != None:
+        if config is not None:
             CTaosInterface.libtaos.taos_options(3, self._config)
 
         CTaosInterface.libtaos.taos_init()
@@ -227,7 +371,13 @@ class CTaosInterface(object):
         """
         return self._config
 
-    def connect(self, host=None, user="root", password="taosdata", db=None, port=0):
+    def connect(
+            self,
+            host=None,
+            user="root",
+            password="taosdata",
+            db=None,
+            port=0):
         '''
         Function to connect to server
 
@@ -236,7 +386,7 @@ class CTaosInterface(object):
         # host
         try:
             _host = ctypes.c_char_p(host.encode(
-                "utf-8")) if host != None else ctypes.c_char_p(None)
+                "utf-8")) if host is not None else ctypes.c_char_p(None)
         except AttributeError:
             raise AttributeError("host is expected as a str")
 
@@ -255,7 +405,7 @@ class CTaosInterface(object):
         # db
         try:
             _db = ctypes.c_char_p(
-                db.encode("utf-8")) if db != None else ctypes.c_char_p(None)
+                db.encode("utf-8")) if db is not None else ctypes.c_char_p(None)
         except AttributeError:
             raise AttributeError("db is expected as a str")
 
@@ -268,11 +418,11 @@ class CTaosInterface(object):
         connection = ctypes.c_void_p(CTaosInterface.libtaos.taos_connect(
             _host, _user, _password, _db, _port))
 
-        if connection.value == None:
+        if connection.value is None:
             print('connect to TDengine failed')
             raise ConnectionError("connect to TDengine failed")
             # sys.exit(1)
-        #else:
+        # else:
         #    print('connect to TDengine success')
 
         return connection
@@ -293,12 +443,13 @@ class CTaosInterface(object):
         @rtype: 0 on success and -1 on failure
         '''
         try:
-            return CTaosInterface.libtaos.taos_query(connection, ctypes.c_char_p(sql.encode('utf-8')))
+            return CTaosInterface.libtaos.taos_query(
+                connection, ctypes.c_char_p(sql.encode('utf-8')))
         except AttributeError:
             raise AttributeError("sql is expected as a string")
         # finally:
         #     CTaosInterface.libtaos.close(connection)
-      
+
     @staticmethod
     def affectedRows(result):
         """The affected rows after runing query
@@ -308,7 +459,7 @@ class CTaosInterface(object):
     @staticmethod
     def subscribe(connection, restart, topic, sql, interval):
         """Create a subscription
-         @restart boolean, 
+         @restart boolean,
          @sql string, sql statement for data query, must be a 'select' statement.
          @topic string, name of this subscription
         """
@@ -360,38 +511,53 @@ class CTaosInterface(object):
             result, ctypes.byref(pblock))
         if num_of_rows == 0:
             return None, 0
-        isMicro = (CTaosInterface.libtaos.taos_result_precision(result) == FieldType.C_TIMESTAMP_MICRO)
+        isMicro = (CTaosInterface.libtaos.taos_result_precision(
+            result) == FieldType.C_TIMESTAMP_MICRO)
         blocks = [None] * len(fields)
         fieldL = CTaosInterface.libtaos.taos_fetch_lengths(result)
-        fieldLen = [ele for ele in ctypes.cast(fieldL,  ctypes.POINTER(ctypes.c_int))[:len(fields)]]
+        fieldLen = [
+            ele for ele in ctypes.cast(
+                fieldL, ctypes.POINTER(
+                    ctypes.c_int))[
+                :len(fields)]]
         for i in range(len(fields)):
             data = ctypes.cast(pblock, ctypes.POINTER(ctypes.c_void_p))[i]
             if fields[i]['type'] not in _CONVERT_FUNC_BLOCK:
                 raise DatabaseError("Invalid data type returned from database")
-            blocks[i] = _CONVERT_FUNC_BLOCK[fields[i]['type']](data, num_of_rows, fieldLen[i], isMicro)
+            blocks[i] = _CONVERT_FUNC_BLOCK[fields[i]['type']](
+                data, num_of_rows, fieldLen[i], isMicro)
 
         return blocks, abs(num_of_rows)
+
     @staticmethod
     def fetchRow(result, fields):
         pblock = ctypes.c_void_p(0)
-        pblock = CTaosInterface.libtaos.taos_fetch_row(result)  
-        if pblock : 
+        pblock = CTaosInterface.libtaos.taos_fetch_row(result)
+        if pblock:
             num_of_rows = 1
-            isMicro = (CTaosInterface.libtaos.taos_result_precision(result) == FieldType.C_TIMESTAMP_MICRO)
+            isMicro = (CTaosInterface.libtaos.taos_result_precision(
+                result) == FieldType.C_TIMESTAMP_MICRO)
             blocks = [None] * len(fields)
             fieldL = CTaosInterface.libtaos.taos_fetch_lengths(result)
-            fieldLen = [ele for ele in ctypes.cast(fieldL,  ctypes.POINTER(ctypes.c_int))[:len(fields)]]
+            fieldLen = [
+                ele for ele in ctypes.cast(
+                    fieldL, ctypes.POINTER(
+                        ctypes.c_int))[
+                    :len(fields)]]
             for i in range(len(fields)):
                 data = ctypes.cast(pblock, ctypes.POINTER(ctypes.c_void_p))[i]
                 if fields[i]['type'] not in _CONVERT_FUNC:
-                    raise DatabaseError("Invalid data type returned from database")
+                    raise DatabaseError(
+                        "Invalid data type returned from database")
                 if data is None:
                     blocks[i] = [None]
                 else:
-                    blocks[i] = _CONVERT_FUNC[fields[i]['type']](data, num_of_rows, fieldLen[i], isMicro)         
+                    blocks[i] = _CONVERT_FUNC[fields[i]['type']](
+                        data, num_of_rows, fieldLen[i], isMicro)
         else:
             return None, 0
         return blocks, abs(num_of_rows)
+
     @staticmethod
     def freeResult(result):
         CTaosInterface.libtaos.taos_free_result(result)

src/connector/python/linux/python2/taos/connection.py

@@ -2,9 +2,11 @@ from .cursor import TDengineCursor
 from .subscription import TDengineSubscription
 from .cinterface import CTaosInterface
 
+
 class TDengineConnection(object):
     """ TDengine connection object
     """
+
     def __init__(self, *args, **kwargs):
         self._conn = None
         self._host = None
@@ -29,7 +31,7 @@ class TDengineConnection(object):
         # password
         if 'password' in kwargs:
             self._password = kwargs['password']
-        
+
         # database
         if 'database' in kwargs:
             self._database = kwargs['database']
@@ -43,7 +45,12 @@ class TDengineConnection(object):
             self._config = kwargs['config']
 
         self._chandle = CTaosInterface(self._config)
-        self._conn = self._chandle.connect(self._host, self._user, self._password, self._database, self._port)
+        self._conn = self._chandle.connect(
+            self._host,
+            self._user,
+            self._password,
+            self._database,
+            self._port)
 
     def close(self):
         """Close current connection.
@@ -55,7 +62,8 @@ class TDengineConnection(object):
         """
         if self._conn is None:
             return None
-        sub = CTaosInterface.subscribe(self._conn, restart, topic, sql, interval)
+        sub = CTaosInterface.subscribe(
+            self._conn, restart, topic, sql, interval)
         return TDengineSubscription(sub)
 
     def cursor(self):
@@ -80,7 +88,8 @@ class TDengineConnection(object):
         """
         pass
 
+
 if __name__ == "__main__":
     conn = TDengineConnection(host='192.168.1.107')
     conn.close()
-    print("Hello world")
+    print("Hello world")

src/connector/python/linux/python2/taos/constants.py

@@ -3,6 +3,7 @@
 
 from .dbapi import *
 
+
 class FieldType(object):
     """TDengine Field Types
     """
@@ -18,13 +19,21 @@ class FieldType(object):
     C_BINARY = 8
     C_TIMESTAMP = 9
     C_NCHAR = 10
+    C_TINYINT_UNSIGNED = 12
+    C_SMALLINT_UNSIGNED = 13
+    C_INT_UNSIGNED = 14
+    C_BIGINT_UNSIGNED = 15
     # NULL value definition
     # NOTE: These values should change according to C definition in tsdb.h
     C_BOOL_NULL = 0x02
     C_TINYINT_NULL = -128
+    C_TINYINT_UNSIGNED_NULL = 255
     C_SMALLINT_NULL = -32768
+    C_SMALLINT_UNSIGNED_NULL = 65535
     C_INT_NULL = -2147483648
+    C_INT_UNSIGNED_NULL = 4294967295
     C_BIGINT_NULL = -9223372036854775808
+    C_BIGINT_UNSIGNED_NULL = 18446744073709551615
     C_FLOAT_NULL = float('nan')
     C_DOUBLE_NULL = float('nan')
     C_BINARY_NULL = bytearray([int('0xff', 16)])

src/connector/python/linux/python2/taos/cursor.py

@@ -128,8 +128,8 @@ class TDengineCursor(object):
         if errno == 0:
             if CTaosInterface.fieldsCount(self._result) == 0:
                 self._affected_rows += CTaosInterface.affectedRows(
-                    self._result )
-                return CTaosInterface.affectedRows(self._result )
+                    self._result)
+                return CTaosInterface.affectedRows(self._result)
             else:
                 self._fields = CTaosInterface.useResult(
                     self._result)
@@ -148,6 +148,7 @@ class TDengineCursor(object):
         """Fetch the next row of a query result set, returning a single sequence, or None when no more data is available.
         """
         pass
+
     def fetchmany(self):
         pass
 
@@ -158,11 +159,26 @@ class TDengineCursor(object):
         if (dataType.upper() == "TINYINT"):
             if (self._description[col][1] == FieldType.C_TINYINT):
                 return True
+        if (dataType.upper() == "TINYINT UNSIGNED"):
+            if (self._description[col][1] == FieldType.C_TINYINT_UNSIGNED):
+                return True
+        if (dataType.upper() == "SMALLINT"):
+            if (self._description[col][1] == FieldType.C_SMALLINT):
+                return True
+        if (dataType.upper() == "SMALLINT UNSIGNED"):
+            if (self._description[col][1] == FieldType.C_SMALLINT_UNSIGNED):
+                return True
         if (dataType.upper() == "INT"):
             if (self._description[col][1] == FieldType.C_INT):
                 return True
+        if (dataType.upper() == "INT UNSIGNED"):
+            if (self._description[col][1] == FieldType.C_INT_UNSIGNED):
+                return True
         if (dataType.upper() == "BIGINT"):
-            if (self._description[col][1] == FieldType.C_INT):
+            if (self._description[col][1] == FieldType.C_BIGINT):
+                return True
+        if (dataType.upper() == "BIGINT UNSIGNED"):
+            if (self._description[col][1] == FieldType.C_BIGINT_UNSIGNED):
                 return True
         if (dataType.upper() == "FLOAT"):
             if (self._description[col][1] == FieldType.C_FLOAT):
@@ -191,16 +207,20 @@ class TDengineCursor(object):
         buffer = [[] for i in range(len(self._fields))]
         self._rowcount = 0
         while True:
-            block, num_of_fields = CTaosInterface.fetchRow(self._result, self._fields)
+            block, num_of_fields = CTaosInterface.fetchRow(
+                self._result, self._fields)
             errno = CTaosInterface.libtaos.taos_errno(self._result)
             if errno != 0:
-                raise ProgrammingError(CTaosInterface.errStr(self._result), errno)
+                raise ProgrammingError(
+                    CTaosInterface.errStr(
+                        self._result), errno)
             if num_of_fields == 0:
                 break
             self._rowcount += num_of_fields
             for i in range(len(self._fields)):
                 buffer[i].extend(block[i])
         return list(map(tuple, zip(*buffer)))
+
     def fetchall(self):
         if self._result is None or self._fields is None:
             raise OperationalError("Invalid use of fetchall")
@@ -208,16 +228,20 @@ class TDengineCursor(object):
         buffer = [[] for i in range(len(self._fields))]
         self._rowcount = 0
         while True:
-            block, num_of_fields = CTaosInterface.fetchBlock(self._result, self._fields)
+            block, num_of_fields = CTaosInterface.fetchBlock(
+                self._result, self._fields)
             errno = CTaosInterface.libtaos.taos_errno(self._result)
             if errno != 0:
-                raise ProgrammingError(CTaosInterface.errStr(self._result), errno)
+                raise ProgrammingError(
+                    CTaosInterface.errStr(
+                        self._result), errno)
             if num_of_fields == 0:
                 break
             self._rowcount += num_of_fields
             for i in range(len(self._fields)):
                 buffer[i].extend(block[i])
         return list(map(tuple, zip(*buffer)))
+
     def nextset(self):
         """
         """

src/connector/python/linux/python2/taos/dbapi.py

@@ -4,6 +4,7 @@
 import time
 import datetime
 
+
 class DBAPITypeObject(object):
     def __init__(self, *values):
         self.values = values
@@ -16,23 +17,28 @@ class DBAPITypeObject(object):
         else:
             return -1
 
+
 Date = datetime.date
 Time = datetime.time
 Timestamp = datetime.datetime
 
+
 def DataFromTicks(ticks):
     return Date(*time.localtime(ticks)[:3])
 
+
 def TimeFromTicks(ticks):
     return Time(*time.localtime(ticks)[3:6])
 
+
 def TimestampFromTicks(ticks):
     return Timestamp(*time.localtime(ticks)[:6])
 
+
 Binary = bytes
 
 # STRING = DBAPITypeObject(*constants.FieldType.get_string_types())
 # BINARY = DBAPITypeObject(*constants.FieldType.get_binary_types())
 # NUMBER = BAPITypeObject(*constants.FieldType.get_number_types())
 # DATETIME = DBAPITypeObject(*constants.FieldType.get_timestamp_types())
-# ROWID = DBAPITypeObject()
+# ROWID = DBAPITypeObject()

src/connector/python/linux/python2/taos/error.py

@@ -1,35 +1,41 @@
 """Python exceptions
 """
 
+
 class Error(Exception):
     def __init__(self, msg=None, errno=None):
         self.msg = msg
         self._full_msg = self.msg
         self.errno = errno
-    
+
     def __str__(self):
         return self._full_msg
 
+
 class Warning(Exception):
     """Exception raised for important warnings like data truncations while inserting.
     """
     pass
 
+
 class InterfaceError(Error):
-    """Exception raised for errors that are related to the database interface rather than the database itself. 
+    """Exception raised for errors that are related to the database interface rather than the database itself.
     """
     pass
 
+
 class DatabaseError(Error):
-    """Exception raised for errors that are related to the database. 
+    """Exception raised for errors that are related to the database.
     """
     pass
 
+
 class DataError(DatabaseError):
     """Exception raised for errors that are due to problems with the processed data like division by zero, numeric value out of range.
     """
     pass
 
+
 class OperationalError(DatabaseError):
     """Exception raised for errors that are related to the database's operation and not necessarily under the control of the programmer
     """
@@ -41,17 +47,20 @@ class IntegrityError(DatabaseError):
     """
     pass
 
+
 class InternalError(DatabaseError):
     """Exception raised when the database encounters an internal error.
     """
     pass
 
+
 class ProgrammingError(DatabaseError):
     """Exception raised for programming errors.
     """
     pass
 
+
 class NotSupportedError(DatabaseError):
     """Exception raised in case a method or database API was used which is not supported by the database,.
     """
-    pass
+    pass

src/connector/python/linux/python2/taos/subscription.py

@@ -1,52 +1,57 @@
 from .cinterface import CTaosInterface
 from .error import *
 
+
 class TDengineSubscription(object):
     """TDengine subscription object
     """
+
     def __init__(self, sub):
         self._sub = sub
-    
 
     def consume(self):
         """Consume rows of a subscription
         """
         if self._sub is None:
             raise OperationalError("Invalid use of consume")
-        
+
         result, fields = CTaosInterface.consume(self._sub)
         buffer = [[] for i in range(len(fields))]
         while True:
             block, num_of_fields = CTaosInterface.fetchBlock(result, fields)
-            if num_of_fields == 0: break
+            if num_of_fields == 0:
+                break
             for i in range(len(fields)):
                 buffer[i].extend(block[i])
 
         self.fields = fields
         return list(map(tuple, zip(*buffer)))
 
-
-    def close(self, keepProgress = True):
+    def close(self, keepProgress=True):
         """Close the Subscription.
         """
         if self._sub is None:
             return False
-        
+
         CTaosInterface.unsubscribe(self._sub, keepProgress)
         return True
 
 
 if __name__ == '__main__':
     from .connection import TDengineConnection
-    conn = TDengineConnection(host="127.0.0.1", user="root", password="taosdata", database="test")
+    conn = TDengineConnection(
+        host="127.0.0.1",
+        user="root",
+        password="taosdata",
+        database="test")
 
     # Generate a cursor object to run SQL commands
     sub = conn.subscribe(True, "test", "select * from meters;", 1000)
 
-    for i in range(0,10):
+    for i in range(0, 10):
         data = sub.consume()
         for d in data:
             print(d)
 
     sub.close()
-    conn.close()
+    conn.close()

src/connector/python/linux/python3/setup.py

@@ -5,7 +5,7 @@ with open("README.md", "r") as fh:
 
 setuptools.setup(
     name="taos",
-    version="2.0.4",
+    version="2.0.5",
     author="Taosdata Inc.",
     author_email="support@taosdata.com",
     description="TDengine python client package",

src/connector/python/linux/python3/taos/__init__.py

@@ -3,12 +3,12 @@ from .connection import TDengineConnection
 from .cursor import TDengineCursor
 
 # Globals
-apilevel = '2.0.3'
 threadsafety = 0
 paramstyle = 'pyformat'
 
 __all__ = ['connection', 'cursor']
 
+
 def connect(*args, **kwargs):
     """ Function to return a TDengine connector object
 

src/connector/python/linux/python3/taos/cinterface.py

@@ -4,11 +4,14 @@ from .error import *
 import math
 import datetime
 
+
 def _convert_millisecond_to_datetime(milli):
-    return datetime.datetime.fromtimestamp(milli/1000.0)
+    return datetime.datetime.fromtimestamp(milli / 1000.0)
+
 
 def _convert_microsecond_to_datetime(micro):
-    return datetime.datetime.fromtimestamp(micro/1000000.0)
+    return datetime.datetime.fromtimestamp(micro / 1000000.0)
+
 
 def _crow_timestamp_to_python(data, num_of_rows, nbytes=None, micro=False):
     """Function to convert C bool row to python row
@@ -18,168 +21,309 @@ def _crow_timestamp_to_python(data, num_of_rows, nbytes=None, micro=False):
         _timestamp_converter = _convert_microsecond_to_datetime
 
     if num_of_rows > 0:
-        return list(map(_timestamp_converter, ctypes.cast(data,  ctypes.POINTER(ctypes.c_long))[:abs(num_of_rows)]))
+        return list(map(_timestamp_converter, ctypes.cast(
+            data, ctypes.POINTER(ctypes.c_long))[:abs(num_of_rows)]))
     else:
-        return list(map(_timestamp_converter, ctypes.cast(data,  ctypes.POINTER(ctypes.c_long))[:abs(num_of_rows)]))
+        return list(map(_timestamp_converter, ctypes.cast(
+            data, ctypes.POINTER(ctypes.c_long))[:abs(num_of_rows)]))
+
 
 def _crow_bool_to_python(data, num_of_rows, nbytes=None, micro=False):
     """Function to convert C bool row to python row
     """
     if num_of_rows > 0:
-        return [ None if ele == FieldType.C_BOOL_NULL else bool(ele) for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_byte))[:abs(num_of_rows)] ]
+        return [
+            None if ele == FieldType.C_BOOL_NULL else bool(ele) for ele in ctypes.cast(
+                data, ctypes.POINTER(
+                    ctypes.c_byte))[
+                :abs(num_of_rows)]]
     else:
-        return [ None if ele == FieldType.C_BOOL_NULL else bool(ele) for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_bool))[:abs(num_of_rows)] ]
+        return [
+            None if ele == FieldType.C_BOOL_NULL else bool(ele) for ele in ctypes.cast(
+                data, ctypes.POINTER(
+                    ctypes.c_bool))[
+                :abs(num_of_rows)]]
+
 
 def _crow_tinyint_to_python(data, num_of_rows, nbytes=None, micro=False):
     """Function to convert C tinyint row to python row
     """
     if num_of_rows > 0:
-        return [ None if ele == FieldType.C_TINYINT_NULL else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_byte))[:abs(num_of_rows)] ]
+        return [None if ele == FieldType.C_TINYINT_NULL else ele for ele in ctypes.cast(
+            data, ctypes.POINTER(ctypes.c_byte))[:abs(num_of_rows)]]
     else:
-        return [ None if ele == FieldType.C_TINYINT_NULL else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_byte))[:abs(num_of_rows)] ]
-    
+        return [None if ele == FieldType.C_TINYINT_NULL else ele for ele in ctypes.cast(
+            data, ctypes.POINTER(ctypes.c_byte))[:abs(num_of_rows)]]
+
+
+def _crow_tinyint_unsigned_to_python(
+        data,
+        num_of_rows,
+        nbytes=None,
+        micro=False):
+    """Function to convert C tinyint row to python row
+    """
+    if num_of_rows > 0:
+        return [
+            None if ele == FieldType.C_TINYINT_UNSIGNED_NULL else ele for ele in ctypes.cast(
+                data, ctypes.POINTER(
+                    ctypes.c_byte))[
+                :abs(num_of_rows)]]
+    else:
+        return [
+            None if ele == FieldType.C_TINYINT_UNSIGNED_NULL else ele for ele in ctypes.cast(
+                data, ctypes.POINTER(
+                    ctypes.c_byte))[
+                :abs(num_of_rows)]]
+
+
 def _crow_smallint_to_python(data, num_of_rows, nbytes=None, micro=False):
     """Function to convert C smallint row to python row
     """
     if num_of_rows > 0:
-        return [ None if ele == FieldType.C_SMALLINT_NULL else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_short))[:abs(num_of_rows)]]
+        return [
+            None if ele == FieldType.C_SMALLINT_NULL else ele for ele in ctypes.cast(
+                data, ctypes.POINTER(
+                    ctypes.c_short))[
+                :abs(num_of_rows)]]
     else:
-        return [ None if ele == FieldType.C_SMALLINT_NULL else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_short))[:abs(num_of_rows)] ]
+        return [
+            None if ele == FieldType.C_SMALLINT_NULL else ele for ele in ctypes.cast(
+                data, ctypes.POINTER(
+                    ctypes.c_short))[
+                :abs(num_of_rows)]]
+
+
+def _crow_smallint_unsigned_to_python(
+        data, num_of_rows, nbytes=None, micro=False):
+    """Function to convert C smallint row to python row
+    """
+    if num_of_rows > 0:
+        return [
+            None if ele == FieldType.C_SMALLINT_UNSIGNED_NULL else ele for ele in ctypes.cast(
+                data, ctypes.POINTER(
+                    ctypes.c_short))[
+                :abs(num_of_rows)]]
+    else:
+        return [
+            None if ele == FieldType.C_SMALLINT_UNSIGNED_NULL else ele for ele in ctypes.cast(
+                data, ctypes.POINTER(
+                    ctypes.c_short))[
+                :abs(num_of_rows)]]
+
 
 def _crow_int_to_python(data, num_of_rows, nbytes=None, micro=False):
     """Function to convert C int row to python row
     """
     if num_of_rows > 0:
-        return [ None if ele == FieldType.C_INT_NULL else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_int))[:abs(num_of_rows)] ]
+        return [None if ele == FieldType.C_INT_NULL else ele for ele in ctypes.cast(
+            data, ctypes.POINTER(ctypes.c_int))[:abs(num_of_rows)]]
     else:
-        return [ None if ele == FieldType.C_INT_NULL else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_int))[:abs(num_of_rows)] ]
+        return [None if ele == FieldType.C_INT_NULL else ele for ele in ctypes.cast(
+            data, ctypes.POINTER(ctypes.c_int))[:abs(num_of_rows)]]
+
+
+def _crow_int_unsigned_to_python(data, num_of_rows, nbytes=None, micro=False):
+    """Function to convert C int row to python row
+    """
+    if num_of_rows > 0:
+        return [
+            None if ele == FieldType.C_INT_UNSIGNED_NULL else ele for ele in ctypes.cast(
+                data, ctypes.POINTER(
+                    ctypes.c_int))[
+                :abs(num_of_rows)]]
+    else:
+        return [
+            None if ele == FieldType.C_INT_UNSIGNED_NULL else ele for ele in ctypes.cast(
+                data, ctypes.POINTER(
+                    ctypes.c_int))[
+                :abs(num_of_rows)]]
+
 
 def _crow_bigint_to_python(data, num_of_rows, nbytes=None, micro=False):
     """Function to convert C bigint row to python row
     """
     if num_of_rows > 0:
-        return [ None if ele == FieldType.C_BIGINT_NULL else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_long))[:abs(num_of_rows)] ]
+        return [None if ele == FieldType.C_BIGINT_NULL else ele for ele in ctypes.cast(
+            data, ctypes.POINTER(ctypes.c_long))[:abs(num_of_rows)]]
     else:
-        return [ None if ele == FieldType.C_BIGINT_NULL else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_long))[:abs(num_of_rows)] ]
+        return [None if ele == FieldType.C_BIGINT_NULL else ele for ele in ctypes.cast(
+            data, ctypes.POINTER(ctypes.c_long))[:abs(num_of_rows)]]
+
+
+def _crow_bigint_unsigned_to_python(
+        data,
+        num_of_rows,
+        nbytes=None,
+        micro=False):
+    """Function to convert C bigint row to python row
+    """
+    if num_of_rows > 0:
+        return [
+            None if ele == FieldType.C_BIGINT_UNSIGNED_NULL else ele for ele in ctypes.cast(
+                data, ctypes.POINTER(
+                    ctypes.c_long))[
+                :abs(num_of_rows)]]
+    else:
+        return [
+            None if ele == FieldType.C_BIGINT_UNSIGNED_NULL else ele for ele in ctypes.cast(
+                data, ctypes.POINTER(
+                    ctypes.c_long))[
+                :abs(num_of_rows)]]
+
 
 def _crow_float_to_python(data, num_of_rows, nbytes=None, micro=False):
     """Function to convert C float row to python row
     """
     if num_of_rows > 0:
-        return [ None if math.isnan(ele) else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_float))[:abs(num_of_rows)] ]
+        return [None if math.isnan(ele) else ele for ele in ctypes.cast(
+            data, ctypes.POINTER(ctypes.c_float))[:abs(num_of_rows)]]
     else:
-        return [ None if math.isnan(ele) else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_float))[:abs(num_of_rows)] ]
+        return [None if math.isnan(ele) else ele for ele in ctypes.cast(
+            data, ctypes.POINTER(ctypes.c_float))[:abs(num_of_rows)]]
+
 
 def _crow_double_to_python(data, num_of_rows, nbytes=None, micro=False):
     """Function to convert C double row to python row
     """
     if num_of_rows > 0:
-        return [ None if math.isnan(ele) else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_double))[:abs(num_of_rows)] ]
+        return [None if math.isnan(ele) else ele for ele in ctypes.cast(
+            data, ctypes.POINTER(ctypes.c_double))[:abs(num_of_rows)]]
     else:
-        return [ None if math.isnan(ele) else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_double))[:abs(num_of_rows)] ]
+        return [None if math.isnan(ele) else ele for ele in ctypes.cast(
+            data, ctypes.POINTER(ctypes.c_double))[:abs(num_of_rows)]]
+
 
 def _crow_binary_to_python(data, num_of_rows, nbytes=None, micro=False):
     """Function to convert C binary row to python row
     """
     assert(nbytes is not None)
     if num_of_rows > 0:
-        return [ None if ele.value[0:1] == FieldType.C_BINARY_NULL else ele.value.decode('utf-8') for ele in (ctypes.cast(data,  ctypes.POINTER(ctypes.c_char * nbytes)))[:abs(num_of_rows)]]
+        return [None if ele.value[0:1] == FieldType.C_BINARY_NULL else ele.value.decode(
+            'utf-8') for ele in (ctypes.cast(data, ctypes.POINTER(ctypes.c_char * nbytes)))[:abs(num_of_rows)]]
     else:
-        return [ None if ele.value[0:1] == FieldType.C_BINARY_NULL else ele.value.decode('utf-8') for ele in (ctypes.cast(data,  ctypes.POINTER(ctypes.c_char * nbytes)))[:abs(num_of_rows)]]
+        return [None if ele.value[0:1] == FieldType.C_BINARY_NULL else ele.value.decode(
+            'utf-8') for ele in (ctypes.cast(data, ctypes.POINTER(ctypes.c_char * nbytes)))[:abs(num_of_rows)]]
+
 
 def _crow_nchar_to_python(data, num_of_rows, nbytes=None, micro=False):
     """Function to convert C nchar row to python row
     """
     assert(nbytes is not None)
-    res=[]
+    res = []
     for i in range(abs(num_of_rows)):
         try:
             if num_of_rows >= 0:
                 tmpstr = ctypes.c_char_p(data)
-                res.append( tmpstr.value.decode() )
+                res.append(tmpstr.value.decode())
             else:
-                res.append( (ctypes.cast(data+nbytes*i,  ctypes.POINTER(ctypes.c_wchar * (nbytes//4))))[0].value )
+                res.append((ctypes.cast(data + nbytes * i,
+                                        ctypes.POINTER(ctypes.c_wchar * (nbytes // 4))))[0].value)
         except ValueError:
             res.append(None)
 
-    return res 
+    return res
+
 
 def _crow_binary_to_python_block(data, num_of_rows, nbytes=None, micro=False):
     """Function to convert C binary row to python row
     """
     assert(nbytes is not None)
-    res=[]
+    res = []
     if num_of_rows > 0:
         for i in range(abs(num_of_rows)):
             try:
-                rbyte=ctypes.cast(data+nbytes*i,ctypes.POINTER(ctypes.c_short))[:1].pop()
-                tmpstr = ctypes.c_char_p(data+nbytes*i+2)
-                res.append( tmpstr.value.decode()[0:rbyte] )
+                rbyte = ctypes.cast(
+                    data + nbytes * i,
+                    ctypes.POINTER(
+                        ctypes.c_short))[
+                    :1].pop()
+                tmpstr = ctypes.c_char_p(data + nbytes * i + 2)
+                res.append(tmpstr.value.decode()[0:rbyte])
             except ValueError:
                 res.append(None)
     else:
         for i in range(abs(num_of_rows)):
             try:
-                rbyte=ctypes.cast(data+nbytes*i,ctypes.POINTER(ctypes.c_short))[:1].pop()
-                tmpstr = ctypes.c_char_p(data+nbytes*i+2)
-                res.append( tmpstr.value.decode()[0:rbyte] )
+                rbyte = ctypes.cast(
+                    data + nbytes * i,
+                    ctypes.POINTER(
+                        ctypes.c_short))[
+                    :1].pop()
+                tmpstr = ctypes.c_char_p(data + nbytes * i + 2)
+                res.append(tmpstr.value.decode()[0:rbyte])
             except ValueError:
                 res.append(None)
     return res
 
+
 def _crow_nchar_to_python_block(data, num_of_rows, nbytes=None, micro=False):
     """Function to convert C nchar row to python row
     """
     assert(nbytes is not None)
-    res=[]
+    res = []
     if num_of_rows >= 0:
         for i in range(abs(num_of_rows)):
             try:
-                tmpstr = ctypes.c_char_p(data+nbytes*i+2)
-                res.append( tmpstr.value.decode() )
+                tmpstr = ctypes.c_char_p(data + nbytes * i + 2)
+                res.append(tmpstr.value.decode())
             except ValueError:
                 res.append(None)
     else:
         for i in range(abs(num_of_rows)):
             try:
-                res.append( (ctypes.cast(data+nbytes*i+2,  ctypes.POINTER(ctypes.c_wchar * (nbytes//4))))[0].value )
+                res.append((ctypes.cast(data + nbytes * i + 2,
+                                        ctypes.POINTER(ctypes.c_wchar * (nbytes // 4))))[0].value)
             except ValueError:
                 res.append(None)
     return res
 
+
 _CONVERT_FUNC = {
     FieldType.C_BOOL: _crow_bool_to_python,
-    FieldType.C_TINYINT : _crow_tinyint_to_python,
-    FieldType.C_SMALLINT : _crow_smallint_to_python,
-    FieldType.C_INT : _crow_int_to_python,
-    FieldType.C_BIGINT : _crow_bigint_to_python,
-    FieldType.C_FLOAT : _crow_float_to_python,
-    FieldType.C_DOUBLE : _crow_double_to_python,
+    FieldType.C_TINYINT: _crow_tinyint_to_python,
+    FieldType.C_SMALLINT: _crow_smallint_to_python,
+    FieldType.C_INT: _crow_int_to_python,
+    FieldType.C_BIGINT: _crow_bigint_to_python,
+    FieldType.C_FLOAT: _crow_float_to_python,
+    FieldType.C_DOUBLE: _crow_double_to_python,
     FieldType.C_BINARY: _crow_binary_to_python,
-    FieldType.C_TIMESTAMP : _crow_timestamp_to_python, 
-    FieldType.C_NCHAR : _crow_nchar_to_python
+    FieldType.C_TIMESTAMP: _crow_timestamp_to_python,
+    FieldType.C_NCHAR: _crow_nchar_to_python,
+    FieldType.C_TINYINT_UNSIGNED: _crow_tinyint_unsigned_to_python,
+    FieldType.C_SMALLINT_UNSIGNED: _crow_smallint_unsigned_to_python,
+    FieldType.C_INT_UNSIGNED: _crow_int_unsigned_to_python,
+    FieldType.C_BIGINT_UNSIGNED: _crow_bigint_unsigned_to_python
 }
 
 _CONVERT_FUNC_BLOCK = {
     FieldType.C_BOOL: _crow_bool_to_python,
-    FieldType.C_TINYINT : _crow_tinyint_to_python,
-    FieldType.C_SMALLINT : _crow_smallint_to_python,
-    FieldType.C_INT : _crow_int_to_python,
-    FieldType.C_BIGINT : _crow_bigint_to_python,
-    FieldType.C_FLOAT : _crow_float_to_python,
-    FieldType.C_DOUBLE : _crow_double_to_python,
+    FieldType.C_TINYINT: _crow_tinyint_to_python,
+    FieldType.C_SMALLINT: _crow_smallint_to_python,
+    FieldType.C_INT: _crow_int_to_python,
+    FieldType.C_BIGINT: _crow_bigint_to_python,
+    FieldType.C_FLOAT: _crow_float_to_python,
+    FieldType.C_DOUBLE: _crow_double_to_python,
     FieldType.C_BINARY: _crow_binary_to_python_block,
-    FieldType.C_TIMESTAMP : _crow_timestamp_to_python, 
-    FieldType.C_NCHAR : _crow_nchar_to_python_block
+    FieldType.C_TIMESTAMP: _crow_timestamp_to_python,
+    FieldType.C_NCHAR: _crow_nchar_to_python_block,
+    FieldType.C_TINYINT_UNSIGNED: _crow_tinyint_unsigned_to_python,
+    FieldType.C_SMALLINT_UNSIGNED: _crow_smallint_unsigned_to_python,
+    FieldType.C_INT_UNSIGNED: _crow_int_unsigned_to_python,
+    FieldType.C_BIGINT_UNSIGNED: _crow_bigint_unsigned_to_python
 }
 
 # Corresponding TAOS_FIELD structure in C
+
+
 class TaosField(ctypes.Structure):
     _fields_ = [('name', ctypes.c_char * 65),
                 ('type', ctypes.c_char),
                 ('bytes', ctypes.c_short)]
 
 # C interface class
+
+
 class CTaosInterface(object):
 
     libtaos = ctypes.CDLL('libtaos.so')
@@ -216,7 +360,7 @@ class CTaosInterface(object):
             except AttributeError:
                 raise AttributeError("config is expected as a str")
 
-        if config != None:
+        if config is not None:
             CTaosInterface.libtaos.taos_options(3, self._config)
 
         CTaosInterface.libtaos.taos_init()
@@ -227,7 +371,13 @@ class CTaosInterface(object):
         """
         return self._config
 
-    def connect(self, host=None, user="root", password="taosdata", db=None, port=0):
+    def connect(
+            self,
+            host=None,
+            user="root",
+            password="taosdata",
+            db=None,
+            port=0):
         '''
         Function to connect to server
 
@@ -236,7 +386,7 @@ class CTaosInterface(object):
         # host
         try:
             _host = ctypes.c_char_p(host.encode(
-                "utf-8")) if host != None else ctypes.c_char_p(None)
+                "utf-8")) if host is not None else ctypes.c_char_p(None)
         except AttributeError:
             raise AttributeError("host is expected as a str")
 
@@ -255,7 +405,7 @@ class CTaosInterface(object):
         # db
         try:
             _db = ctypes.c_char_p(
-                db.encode("utf-8")) if db != None else ctypes.c_char_p(None)
+                db.encode("utf-8")) if db is not None else ctypes.c_char_p(None)
         except AttributeError:
             raise AttributeError("db is expected as a str")
 
@@ -268,11 +418,11 @@ class CTaosInterface(object):
         connection = ctypes.c_void_p(CTaosInterface.libtaos.taos_connect(
             _host, _user, _password, _db, _port))
 
-        if connection.value == None:
+        if connection.value is None:
             print('connect to TDengine failed')
             raise ConnectionError("connect to TDengine failed")
             # sys.exit(1)
-        #else:
+        # else:
         #    print('connect to TDengine success')
 
         return connection
@@ -293,7 +443,8 @@ class CTaosInterface(object):
         @rtype: 0 on success and -1 on failure
         '''
         try:
-            return CTaosInterface.libtaos.taos_query(connection, ctypes.c_char_p(sql.encode('utf-8')))
+            return CTaosInterface.libtaos.taos_query(
+                connection, ctypes.c_char_p(sql.encode('utf-8')))
         except AttributeError:
             raise AttributeError("sql is expected as a string")
         # finally:
@@ -308,7 +459,7 @@ class CTaosInterface(object):
     @staticmethod
     def subscribe(connection, restart, topic, sql, interval):
         """Create a subscription
-         @restart boolean, 
+         @restart boolean,
          @sql string, sql statement for data query, must be a 'select' statement.
          @topic string, name of this subscription
         """
@@ -360,35 +511,49 @@ class CTaosInterface(object):
             result, ctypes.byref(pblock))
         if num_of_rows == 0:
             return None, 0
-        isMicro = (CTaosInterface.libtaos.taos_result_precision(result) == FieldType.C_TIMESTAMP_MICRO)
+        isMicro = (CTaosInterface.libtaos.taos_result_precision(
+            result) == FieldType.C_TIMESTAMP_MICRO)
         blocks = [None] * len(fields)
         fieldL = CTaosInterface.libtaos.taos_fetch_lengths(result)
-        fieldLen = [ele for ele in ctypes.cast(fieldL,  ctypes.POINTER(ctypes.c_int))[:len(fields)]]
+        fieldLen = [
+            ele for ele in ctypes.cast(
+                fieldL, ctypes.POINTER(
+                    ctypes.c_int))[
+                :len(fields)]]
         for i in range(len(fields)):
             data = ctypes.cast(pblock, ctypes.POINTER(ctypes.c_void_p))[i]
             if fields[i]['type'] not in _CONVERT_FUNC_BLOCK:
                 raise DatabaseError("Invalid data type returned from database")
-            blocks[i] = _CONVERT_FUNC_BLOCK[fields[i]['type']](data, num_of_rows, fieldLen[i], isMicro)
+            blocks[i] = _CONVERT_FUNC_BLOCK[fields[i]['type']](
+                data, num_of_rows, fieldLen[i], isMicro)
 
         return blocks, abs(num_of_rows)
+
     @staticmethod
     def fetchRow(result, fields):
         pblock = ctypes.c_void_p(0)
-        pblock = CTaosInterface.libtaos.taos_fetch_row(result)  
-        if pblock : 
+        pblock = CTaosInterface.libtaos.taos_fetch_row(result)
+        if pblock:
             num_of_rows = 1
-            isMicro = (CTaosInterface.libtaos.taos_result_precision(result) == FieldType.C_TIMESTAMP_MICRO)
+            isMicro = (CTaosInterface.libtaos.taos_result_precision(
+                result) == FieldType.C_TIMESTAMP_MICRO)
             blocks = [None] * len(fields)
             fieldL = CTaosInterface.libtaos.taos_fetch_lengths(result)
-            fieldLen = [ele for ele in ctypes.cast(fieldL,  ctypes.POINTER(ctypes.c_int))[:len(fields)]]
+            fieldLen = [
+                ele for ele in ctypes.cast(
+                    fieldL, ctypes.POINTER(
+                        ctypes.c_int))[
+                    :len(fields)]]
             for i in range(len(fields)):
                 data = ctypes.cast(pblock, ctypes.POINTER(ctypes.c_void_p))[i]
                 if fields[i]['type'] not in _CONVERT_FUNC:
-                    raise DatabaseError("Invalid data type returned from database")
+                    raise DatabaseError(
+                        "Invalid data type returned from database")
                 if data is None:
                     blocks[i] = [None]
                 else:
-                    blocks[i] = _CONVERT_FUNC[fields[i]['type']](data, num_of_rows, fieldLen[i], isMicro)         
+                    blocks[i] = _CONVERT_FUNC[fields[i]['type']](
+                        data, num_of_rows, fieldLen[i], isMicro)
         else:
             return None, 0
         return blocks, abs(num_of_rows)

src/connector/python/linux/python3/taos/connection.py

@@ -2,9 +2,11 @@ from .cursor import TDengineCursor
 from .subscription import TDengineSubscription
 from .cinterface import CTaosInterface
 
+
 class TDengineConnection(object):
     """ TDengine connection object
     """
+
     def __init__(self, *args, **kwargs):
         self._conn = None
         self._host = None
@@ -29,7 +31,7 @@ class TDengineConnection(object):
         # password
         if 'password' in kwargs:
             self._password = kwargs['password']
-        
+
         # database
         if 'database' in kwargs:
             self._database = kwargs['database']
@@ -43,7 +45,12 @@ class TDengineConnection(object):
             self._config = kwargs['config']
 
         self._chandle = CTaosInterface(self._config)
-        self._conn = self._chandle.connect(self._host, self._user, self._password, self._database, self._port)
+        self._conn = self._chandle.connect(
+            self._host,
+            self._user,
+            self._password,
+            self._database,
+            self._port)
 
     def close(self):
         """Close current connection.
@@ -55,7 +62,8 @@ class TDengineConnection(object):
         """
         if self._conn is None:
             return None
-        sub = CTaosInterface.subscribe(self._conn, restart, topic, sql, interval)
+        sub = CTaosInterface.subscribe(
+            self._conn, restart, topic, sql, interval)
         return TDengineSubscription(sub)
 
     def cursor(self):
@@ -80,7 +88,8 @@ class TDengineConnection(object):
         """
         pass
 
+
 if __name__ == "__main__":
     conn = TDengineConnection(host='192.168.1.107')
     conn.close()
-    print("Hello world")
+    print("Hello world")

src/connector/python/linux/python3/taos/constants.py

@@ -3,6 +3,7 @@
 
 from .dbapi import *
 
+
 class FieldType(object):
     """TDengine Field Types
     """
@@ -18,13 +19,21 @@ class FieldType(object):
     C_BINARY = 8
     C_TIMESTAMP = 9
     C_NCHAR = 10
+    C_TINYINT_UNSIGNED = 12
+    C_SMALLINT_UNSIGNED = 13
+    C_INT_UNSIGNED = 14
+    C_BIGINT_UNSIGNED = 15
     # NULL value definition
     # NOTE: These values should change according to C definition in tsdb.h
     C_BOOL_NULL = 0x02
     C_TINYINT_NULL = -128
+    C_TINYINT_UNSIGNED_NULL = 255
     C_SMALLINT_NULL = -32768
+    C_SMALLINT_UNSIGNED_NULL = 65535
     C_INT_NULL = -2147483648
+    C_INT_UNSIGNED_NULL = 4294967295
     C_BIGINT_NULL = -9223372036854775808
+    C_BIGINT_UNSIGNED_NULL = 18446744073709551615
     C_FLOAT_NULL = float('nan')
     C_DOUBLE_NULL = float('nan')
     C_BINARY_NULL = bytearray([int('0xff', 16)])

src/connector/python/linux/python3/taos/cursor.py

@@ -5,6 +5,7 @@ import threading
 
 # querySeqNum = 0
 
+
 class TDengineCursor(object):
     """Database cursor which is used to manage the context of a fetch operation.
 
@@ -107,8 +108,8 @@ class TDengineCursor(object):
         # if threading.get_ident() != self._threadId:
         #     info ="Cursor execute:Thread ID not match,creater:"+str(self._threadId)+" caller:"+str(threading.get_ident())
         #     raise OperationalError(info)
-            # print(info)
-            # return None
+        # print(info)
+        # return None
 
         if not operation:
             return None
@@ -137,8 +138,8 @@ class TDengineCursor(object):
         if errno == 0:
             if CTaosInterface.fieldsCount(self._result) == 0:
                 self._affected_rows += CTaosInterface.affectedRows(
-                    self._result )
-                return CTaosInterface.affectedRows(self._result )
+                    self._result)
+                return CTaosInterface.affectedRows(self._result)
             else:
                 self._fields = CTaosInterface.useResult(
                     self._result)
@@ -168,11 +169,26 @@ class TDengineCursor(object):
         if (dataType.upper() == "TINYINT"):
             if (self._description[col][1] == FieldType.C_TINYINT):
                 return True
+        if (dataType.upper() == "TINYINT UNSIGNED"):
+            if (self._description[col][1] == FieldType.C_TINYINT_UNSIGNED):
+                return True
+        if (dataType.upper() == "SMALLINT"):
+            if (self._description[col][1] == FieldType.C_SMALLINT):
+                return True
+        if (dataType.upper() == "SMALLINT UNSIGNED"):
+            if (self._description[col][1] == FieldType.C_SMALLINT_UNSIGNED):
+                return True
         if (dataType.upper() == "INT"):
             if (self._description[col][1] == FieldType.C_INT):
                 return True
+        if (dataType.upper() == "INT UNSIGNED"):
+            if (self._description[col][1] == FieldType.C_INT_UNSIGNED):
+                return True
         if (dataType.upper() == "BIGINT"):
-            if (self._description[col][1] == FieldType.C_INT):
+            if (self._description[col][1] == FieldType.C_BIGINT):
+                return True
+        if (dataType.upper() == "BIGINT UNSIGNED"):
+            if (self._description[col][1] == FieldType.C_BIGINT_UNSIGNED):
                 return True
         if (dataType.upper() == "FLOAT"):
             if (self._description[col][1] == FieldType.C_FLOAT):
@@ -201,10 +217,13 @@ class TDengineCursor(object):
         buffer = [[] for i in range(len(self._fields))]
         self._rowcount = 0
         while True:
-            block, num_of_fields = CTaosInterface.fetchRow(self._result, self._fields)
+            block, num_of_fields = CTaosInterface.fetchRow(
+                self._result, self._fields)
             errno = CTaosInterface.libtaos.taos_errno(self._result)
             if errno != 0:
-                raise ProgrammingError(CTaosInterface.errStr(self._result), errno)
+                raise ProgrammingError(
+                    CTaosInterface.errStr(
+                        self._result), errno)
             if num_of_fields == 0:
                 break
             self._rowcount += num_of_fields
@@ -219,15 +238,20 @@ class TDengineCursor(object):
         buffer = [[] for i in range(len(self._fields))]
         self._rowcount = 0
         while True:
-            block, num_of_fields = CTaosInterface.fetchBlock(self._result, self._fields)
+            block, num_of_fields = CTaosInterface.fetchBlock(
+                self._result, self._fields)
             errno = CTaosInterface.libtaos.taos_errno(self._result)
             if errno != 0:
-                raise ProgrammingError(CTaosInterface.errStr(self._result), errno)
-            if num_of_fields == 0: break
+                raise ProgrammingError(
+                    CTaosInterface.errStr(
+                        self._result), errno)
+            if num_of_fields == 0:
+                break
             self._rowcount += num_of_fields
             for i in range(len(self._fields)):
                 buffer[i].extend(block[i])
         return list(map(tuple, zip(*buffer)))
+
     def nextset(self):
         """
         """
@@ -259,8 +283,8 @@ class TDengineCursor(object):
         # if threading.get_ident() != self._threadId:
         #     info = "Cursor handleresult:Thread ID not match,creater:"+str(self._threadId)+" caller:"+str(threading.get_ident())
         #     raise OperationalError(info)
-            # print(info)
-            # return None
+        # print(info)
+        # return None
 
         self._description = []
         for ele in self._fields:
@@ -268,4 +292,3 @@ class TDengineCursor(object):
                 (ele['name'], ele['type'], None, None, None, None, False))
 
         return self._result
-

src/connector/python/linux/python3/taos/dbapi.py

@@ -4,6 +4,7 @@
 import time
 import datetime
 
+
 class DBAPITypeObject(object):
     def __init__(self, *values):
         self.values = values
@@ -16,23 +17,28 @@ class DBAPITypeObject(object):
         else:
             return -1
 
+
 Date = datetime.date
 Time = datetime.time
 Timestamp = datetime.datetime
 
+
 def DataFromTicks(ticks):
     return Date(*time.localtime(ticks)[:3])
 
+
 def TimeFromTicks(ticks):
     return Time(*time.localtime(ticks)[3:6])
 
+
 def TimestampFromTicks(ticks):
     return Timestamp(*time.localtime(ticks)[:6])
 
+
 Binary = bytes
 
 # STRING = DBAPITypeObject(*constants.FieldType.get_string_types())
 # BINARY = DBAPITypeObject(*constants.FieldType.get_binary_types())
 # NUMBER = BAPITypeObject(*constants.FieldType.get_number_types())
 # DATETIME = DBAPITypeObject(*constants.FieldType.get_timestamp_types())
-# ROWID = DBAPITypeObject()
+# ROWID = DBAPITypeObject()

src/connector/python/linux/python3/taos/error.py

@@ -1,35 +1,41 @@
 """Python exceptions
 """
 
+
 class Error(Exception):
     def __init__(self, msg=None, errno=None):
         self.msg = msg
         self._full_msg = self.msg
         self.errno = errno
-    
+
     def __str__(self):
         return self._full_msg
 
+
 class Warning(Exception):
     """Exception raised for important warnings like data truncations while inserting.
     """
     pass
 
+
 class InterfaceError(Error):
-    """Exception raised for errors that are related to the database interface rather than the database itself. 
+    """Exception raised for errors that are related to the database interface rather than the database itself.
     """
     pass
 
+
 class DatabaseError(Error):
-    """Exception raised for errors that are related to the database. 
+    """Exception raised for errors that are related to the database.
     """
     pass
 
+
 class DataError(DatabaseError):
     """Exception raised for errors that are due to problems with the processed data like division by zero, numeric value out of range.
     """
     pass
 
+
 class OperationalError(DatabaseError):
     """Exception raised for errors that are related to the database's operation and not necessarily under the control of the programmer
     """
@@ -41,17 +47,20 @@ class IntegrityError(DatabaseError):
     """
     pass
 
+
 class InternalError(DatabaseError):
     """Exception raised when the database encounters an internal error.
     """
     pass
 
+
 class ProgrammingError(DatabaseError):
     """Exception raised for programming errors.
     """
     pass
 
+
 class NotSupportedError(DatabaseError):
     """Exception raised in case a method or database API was used which is not supported by the database,.
     """
-    pass
+    pass

src/connector/python/linux/python3/taos/subscription.py

@@ -1,32 +1,33 @@
 from .cinterface import CTaosInterface
 from .error import *
 
+
 class TDengineSubscription(object):
     """TDengine subscription object
     """
+
     def __init__(self, sub):
         self._sub = sub
 
-
     def consume(self):
         """Consume rows of a subscription
         """
         if self._sub is None:
             raise OperationalError("Invalid use of consume")
-        
+
         result, fields = CTaosInterface.consume(self._sub)
         buffer = [[] for i in range(len(fields))]
         while True:
             block, num_of_fields = CTaosInterface.fetchBlock(result, fields)
-            if num_of_fields == 0: break
+            if num_of_fields == 0:
+                break
             for i in range(len(fields)):
                 buffer[i].extend(block[i])
 
         self.fields = fields
         return list(map(tuple, zip(*buffer)))
 
-
-    def close(self, keepProgress = True):
+    def close(self, keepProgress=True):
         """Close the Subscription.
         """
         if self._sub is None:
@@ -38,15 +39,19 @@ class TDengineSubscription(object):
 
 if __name__ == '__main__':
     from .connection import TDengineConnection
-    conn = TDengineConnection(host="127.0.0.1", user="root", password="taosdata", database="test")
+    conn = TDengineConnection(
+        host="127.0.0.1",
+        user="root",
+        password="taosdata",
+        database="test")
 
     # Generate a cursor object to run SQL commands
     sub = conn.subscribe(True, "test", "select * from meters;", 1000)
 
-    for i in range(0,10):
+    for i in range(0, 10):
         data = sub.consume()
         for d in data:
             print(d)
 
     sub.close()
-    conn.close()
+    conn.close()

src/connector/python/osx/python3/setup.py

@@ -5,7 +5,7 @@ with open("README.md", "r") as fh:
 
 setuptools.setup(
     name="taos",
-    version="2.0.4",
+    version="2.0.5",
     author="Taosdata Inc.",
     author_email="support@taosdata.com",
     description="TDengine python client package",

src/connector/python/osx/python3/taos/__init__.py

@@ -3,12 +3,12 @@ from .connection import TDengineConnection
 from .cursor import TDengineCursor
 
 # Globals
-apilevel = '2.0.4'
 threadsafety = 0
 paramstyle = 'pyformat'
 
 __all__ = ['connection', 'cursor']
 
+
 def connect(*args, **kwargs):
     """ Function to return a TDengine connector object
 

src/connector/python/osx/python3/taos/cinterface.py

@@ -4,11 +4,14 @@ from .error import *
 import math
 import datetime
 
+
 def _convert_millisecond_to_datetime(milli):
-    return datetime.datetime.fromtimestamp(milli/1000.0)
+    return datetime.datetime.fromtimestamp(milli / 1000.0)
+
 
 def _convert_microsecond_to_datetime(micro):
-    return datetime.datetime.fromtimestamp(micro/1000000.0)
+    return datetime.datetime.fromtimestamp(micro / 1000000.0)
+
 
 def _crow_timestamp_to_python(data, num_of_rows, nbytes=None, micro=False):
     """Function to convert C bool row to python row
@@ -18,168 +21,309 @@ def _crow_timestamp_to_python(data, num_of_rows, nbytes=None, micro=False):
         _timestamp_converter = _convert_microsecond_to_datetime
 
     if num_of_rows > 0:
-        return list(map(_timestamp_converter, ctypes.cast(data,  ctypes.POINTER(ctypes.c_long))[:abs(num_of_rows)]))
+        return list(map(_timestamp_converter, ctypes.cast(
+            data, ctypes.POINTER(ctypes.c_long))[:abs(num_of_rows)]))
     else:
-        return list(map(_timestamp_converter, ctypes.cast(data,  ctypes.POINTER(ctypes.c_long))[:abs(num_of_rows)]))
+        return list(map(_timestamp_converter, ctypes.cast(
+            data, ctypes.POINTER(ctypes.c_long))[:abs(num_of_rows)]))
+
 
 def _crow_bool_to_python(data, num_of_rows, nbytes=None, micro=False):
     """Function to convert C bool row to python row
     """
     if num_of_rows > 0:
-        return [ None if ele == FieldType.C_BOOL_NULL else bool(ele) for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_byte))[:abs(num_of_rows)] ]
+        return [
+            None if ele == FieldType.C_BOOL_NULL else bool(ele) for ele in ctypes.cast(
+                data, ctypes.POINTER(
+                    ctypes.c_byte))[
+                :abs(num_of_rows)]]
     else:
-        return [ None if ele == FieldType.C_BOOL_NULL else bool(ele) for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_bool))[:abs(num_of_rows)] ]
+        return [
+            None if ele == FieldType.C_BOOL_NULL else bool(ele) for ele in ctypes.cast(
+                data, ctypes.POINTER(
+                    ctypes.c_bool))[
+                :abs(num_of_rows)]]
+
 
 def _crow_tinyint_to_python(data, num_of_rows, nbytes=None, micro=False):
     """Function to convert C tinyint row to python row
     """
     if num_of_rows > 0:
-        return [ None if ele == FieldType.C_TINYINT_NULL else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_byte))[:abs(num_of_rows)] ]
+        return [None if ele == FieldType.C_TINYINT_NULL else ele for ele in ctypes.cast(
+            data, ctypes.POINTER(ctypes.c_byte))[:abs(num_of_rows)]]
     else:
-        return [ None if ele == FieldType.C_TINYINT_NULL else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_byte))[:abs(num_of_rows)] ]
-    
+        return [None if ele == FieldType.C_TINYINT_NULL else ele for ele in ctypes.cast(
+            data, ctypes.POINTER(ctypes.c_byte))[:abs(num_of_rows)]]
+
+
+def _crow_tinyint_unsigned_to_python(
+        data,
+        num_of_rows,
+        nbytes=None,
+        micro=False):
+    """Function to convert C tinyint row to python row
+    """
+    if num_of_rows > 0:
+        return [
+            None if ele == FieldType.C_TINYINT_UNSIGNED_NULL else ele for ele in ctypes.cast(
+                data, ctypes.POINTER(
+                    ctypes.c_byte))[
+                :abs(num_of_rows)]]
+    else:
+        return [
+            None if ele == FieldType.C_TINYINT_UNSIGNED_NULL else ele for ele in ctypes.cast(
+                data, ctypes.POINTER(
+                    ctypes.c_byte))[
+                :abs(num_of_rows)]]
+
+
 def _crow_smallint_to_python(data, num_of_rows, nbytes=None, micro=False):
     """Function to convert C smallint row to python row
     """
     if num_of_rows > 0:
-        return [ None if ele == FieldType.C_SMALLINT_NULL else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_short))[:abs(num_of_rows)]]
+        return [
+            None if ele == FieldType.C_SMALLINT_NULL else ele for ele in ctypes.cast(
+                data, ctypes.POINTER(
+                    ctypes.c_short))[
+                :abs(num_of_rows)]]
     else:
-        return [ None if ele == FieldType.C_SMALLINT_NULL else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_short))[:abs(num_of_rows)] ]
+        return [
+            None if ele == FieldType.C_SMALLINT_NULL else ele for ele in ctypes.cast(
+                data, ctypes.POINTER(
+                    ctypes.c_short))[
+                :abs(num_of_rows)]]
+
+
+def _crow_smallint_unsigned_to_python(
+        data, num_of_rows, nbytes=None, micro=False):
+    """Function to convert C smallint row to python row
+    """
+    if num_of_rows > 0:
+        return [
+            None if ele == FieldType.C_SMALLINT_UNSIGNED_NULL else ele for ele in ctypes.cast(
+                data, ctypes.POINTER(
+                    ctypes.c_short))[
+                :abs(num_of_rows)]]
+    else:
+        return [
+            None if ele == FieldType.C_SMALLINT_UNSIGNED_NULL else ele for ele in ctypes.cast(
+                data, ctypes.POINTER(
+                    ctypes.c_short))[
+                :abs(num_of_rows)]]
+
 
 def _crow_int_to_python(data, num_of_rows, nbytes=None, micro=False):
     """Function to convert C int row to python row
     """
     if num_of_rows > 0:
-        return [ None if ele == FieldType.C_INT_NULL else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_int))[:abs(num_of_rows)] ]
+        return [None if ele == FieldType.C_INT_NULL else ele for ele in ctypes.cast(
+            data, ctypes.POINTER(ctypes.c_int))[:abs(num_of_rows)]]
     else:
-        return [ None if ele == FieldType.C_INT_NULL else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_int))[:abs(num_of_rows)] ]
+        return [None if ele == FieldType.C_INT_NULL else ele for ele in ctypes.cast(
+            data, ctypes.POINTER(ctypes.c_int))[:abs(num_of_rows)]]
+
+
+def _crow_int_unsigned_to_python(data, num_of_rows, nbytes=None, micro=False):
+    """Function to convert C int row to python row
+    """
+    if num_of_rows > 0:
+        return [
+            None if ele == FieldType.C_INT_UNSIGNED_NULL else ele for ele in ctypes.cast(
+                data, ctypes.POINTER(
+                    ctypes.c_int))[
+                :abs(num_of_rows)]]
+    else:
+        return [
+            None if ele == FieldType.C_INT_UNSIGNED_NULL else ele for ele in ctypes.cast(
+                data, ctypes.POINTER(
+                    ctypes.c_int))[
+                :abs(num_of_rows)]]
+
 
 def _crow_bigint_to_python(data, num_of_rows, nbytes=None, micro=False):
     """Function to convert C bigint row to python row
     """
     if num_of_rows > 0:
-        return [ None if ele == FieldType.C_BIGINT_NULL else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_long))[:abs(num_of_rows)] ]
+        return [None if ele == FieldType.C_BIGINT_NULL else ele for ele in ctypes.cast(
+            data, ctypes.POINTER(ctypes.c_long))[:abs(num_of_rows)]]
     else:
-        return [ None if ele == FieldType.C_BIGINT_NULL else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_long))[:abs(num_of_rows)] ]
+        return [None if ele == FieldType.C_BIGINT_NULL else ele for ele in ctypes.cast(
+            data, ctypes.POINTER(ctypes.c_long))[:abs(num_of_rows)]]
+
+
+def _crow_bigint_unsigned_to_python(
+        data,
+        num_of_rows,
+        nbytes=None,
+        micro=False):
+    """Function to convert C bigint row to python row
+    """
+    if num_of_rows > 0:
+        return [
+            None if ele == FieldType.C_BIGINT_UNSIGNED_NULL else ele for ele in ctypes.cast(
+                data, ctypes.POINTER(
+                    ctypes.c_long))[
+                :abs(num_of_rows)]]
+    else:
+        return [
+            None if ele == FieldType.C_BIGINT_UNSIGNED_NULL else ele for ele in ctypes.cast(
+                data, ctypes.POINTER(
+                    ctypes.c_long))[
+                :abs(num_of_rows)]]
+
 
 def _crow_float_to_python(data, num_of_rows, nbytes=None, micro=False):
     """Function to convert C float row to python row
     """
     if num_of_rows > 0:
-        return [ None if math.isnan(ele) else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_float))[:abs(num_of_rows)] ]
+        return [None if math.isnan(ele) else ele for ele in ctypes.cast(
+            data, ctypes.POINTER(ctypes.c_float))[:abs(num_of_rows)]]
     else:
-        return [ None if math.isnan(ele) else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_float))[:abs(num_of_rows)] ]
+        return [None if math.isnan(ele) else ele for ele in ctypes.cast(
+            data, ctypes.POINTER(ctypes.c_float))[:abs(num_of_rows)]]
+
 
 def _crow_double_to_python(data, num_of_rows, nbytes=None, micro=False):
     """Function to convert C double row to python row
     """
     if num_of_rows > 0:
-        return [ None if math.isnan(ele) else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_double))[:abs(num_of_rows)] ]
+        return [None if math.isnan(ele) else ele for ele in ctypes.cast(
+            data, ctypes.POINTER(ctypes.c_double))[:abs(num_of_rows)]]
     else:
-        return [ None if math.isnan(ele) else ele for ele in ctypes.cast(data,  ctypes.POINTER(ctypes.c_double))[:abs(num_of_rows)] ]
+        return [None if math.isnan(ele) else ele for ele in ctypes.cast(
+            data, ctypes.POINTER(ctypes.c_double))[:abs(num_of_rows)]]
+
 
 def _crow_binary_to_python(data, num_of_rows, nbytes=None, micro=False):
     """Function to convert C binary row to python row
     """
     assert(nbytes is not None)
     if num_of_rows > 0:
-        return [ None if ele.value[0:1] == FieldType.C_BINARY_NULL else ele.value.decode('utf-8') for ele in (ctypes.cast(data,  ctypes.POINTER(ctypes.c_char * nbytes)))[:abs(num_of_rows)]]
+        return [None if ele.value[0:1] == FieldType.C_BINARY_NULL else ele.value.decode(
+            'utf-8') for ele in (ctypes.cast(data, ctypes.POINTER(ctypes.c_char * nbytes)))[:abs(num_of_rows)]]
     else:
-        return [ None if ele.value[0:1] == FieldType.C_BINARY_NULL else ele.value.decode('utf-8') for ele in (ctypes.cast(data,  ctypes.POINTER(ctypes.c_char * nbytes)))[:abs(num_of_rows)]]
+        return [None if ele.value[0:1] == FieldType.C_BINARY_NULL else ele.value.decode(
+            'utf-8') for ele in (ctypes.cast(data, ctypes.POINTER(ctypes.c_char * nbytes)))[:abs(num_of_rows)]]
+
 
 def _crow_nchar_to_python(data, num_of_rows, nbytes=None, micro=False):
     """Function to convert C nchar row to python row
     """
     assert(nbytes is not None)
-    res=[]
+    res = []
     for i in range(abs(num_of_rows)):
         try:
             if num_of_rows >= 0:
                 tmpstr = ctypes.c_char_p(data)
-                res.append( tmpstr.value.decode() )
+                res.append(tmpstr.value.decode())
             else:
-                res.append( (ctypes.cast(data+nbytes*i,  ctypes.POINTER(ctypes.c_wchar * (nbytes//4))))[0].value )
+                res.append((ctypes.cast(data + nbytes * i,
+                                        ctypes.POINTER(ctypes.c_wchar * (nbytes // 4))))[0].value)
         except ValueError:
             res.append(None)
 
-    return res 
+    return res
+
 
 def _crow_binary_to_python_block(data, num_of_rows, nbytes=None, micro=False):
     """Function to convert C binary row to python row
     """
     assert(nbytes is not None)
-    res=[]
+    res = []
     if num_of_rows > 0:
         for i in range(abs(num_of_rows)):
             try:
-                rbyte=ctypes.cast(data+nbytes*i,ctypes.POINTER(ctypes.c_short))[:1].pop()
-                tmpstr = ctypes.c_char_p(data+nbytes*i+2)
-                res.append( tmpstr.value.decode()[0:rbyte] )
+                rbyte = ctypes.cast(
+                    data + nbytes * i,
+                    ctypes.POINTER(
+                        ctypes.c_short))[
+                    :1].pop()
+                tmpstr = ctypes.c_char_p(data + nbytes * i + 2)
+                res.append(tmpstr.value.decode()[0:rbyte])
             except ValueError:
                 res.append(None)
     else:
         for i in range(abs(num_of_rows)):
             try:
-                rbyte=ctypes.cast(data+nbytes*i,ctypes.POINTER(ctypes.c_short))[:1].pop()
-                tmpstr = ctypes.c_char_p(data+nbytes*i+2)
-                res.append( tmpstr.value.decode()[0:rbyte] )
+                rbyte = ctypes.cast(
+                    data + nbytes * i,
+                    ctypes.POINTER(
+                        ctypes.c_short))[
+                    :1].pop()
+                tmpstr = ctypes.c_char_p(data + nbytes * i + 2)
+                res.append(tmpstr.value.decode()[0:rbyte])
             except ValueError:
                 res.append(None)
     return res
 
+
 def _crow_nchar_to_python_block(data, num_of_rows, nbytes=None, micro=False):
     """Function to convert C nchar row to python row
     """
     assert(nbytes is not None)
-    res=[]
+    res = []
     if num_of_rows >= 0:
         for i in range(abs(num_of_rows)):
             try:
-                tmpstr = ctypes.c_char_p(data+nbytes*i+2)
-                res.append( tmpstr.value.decode() )
+                tmpstr = ctypes.c_char_p(data + nbytes * i + 2)
+                res.append(tmpstr.value.decode())
             except ValueError:
                 res.append(None)
     else:
         for i in range(abs(num_of_rows)):
             try:
-                res.append( (ctypes.cast(data+nbytes*i+2,  ctypes.POINTER(ctypes.c_wchar * (nbytes//4))))[0].value )
+                res.append((ctypes.cast(data + nbytes * i + 2,
+                                        ctypes.POINTER(ctypes.c_wchar * (nbytes // 4))))[0].value)
             except ValueError:
                 res.append(None)
     return res
 
+
 _CONVERT_FUNC = {
     FieldType.C_BOOL: _crow_bool_to_python,
-    FieldType.C_TINYINT : _crow_tinyint_to_python,
-    FieldType.C_SMALLINT : _crow_smallint_to_python,
-    FieldType.C_INT : _crow_int_to_python,
-    FieldType.C_BIGINT : _crow_bigint_to_python,
-    FieldType.C_FLOAT : _crow_float_to_python,
-    FieldType.C_DOUBLE : _crow_double_to_python,
+    FieldType.C_TINYINT: _crow_tinyint_to_python,
+    FieldType.C_SMALLINT: _crow_smallint_to_python,
+    FieldType.C_INT: _crow_int_to_python,
+    FieldType.C_BIGINT: _crow_bigint_to_python,
+    FieldType.C_FLOAT: _crow_float_to_python,
+    FieldType.C_DOUBLE: _crow_double_to_python,
     FieldType.C_BINARY: _crow_binary_to_python,
-    FieldType.C_TIMESTAMP : _crow_timestamp_to_python, 
-    FieldType.C_NCHAR : _crow_nchar_to_python
+    FieldType.C_TIMESTAMP: _crow_timestamp_to_python,
+    FieldType.C_NCHAR: _crow_nchar_to_python,
+    FieldType.C_TINYINT_UNSIGNED: _crow_tinyint_unsigned_to_python,
+    FieldType.C_SMALLINT_UNSIGNED: _crow_smallint_unsigned_to_python,
+    FieldType.C_INT_UNSIGNED: _crow_int_unsigned_to_python,
+    FieldType.C_BIGINT_UNSIGNED: _crow_bigint_unsigned_to_python
 }
 
 _CONVERT_FUNC_BLOCK = {
     FieldType.C_BOOL: _crow_bool_to_python,
-    FieldType.C_TINYINT : _crow_tinyint_to_python,
-    FieldType.C_SMALLINT : _crow_smallint_to_python,
-    FieldType.C_INT : _crow_int_to_python,
-    FieldType.C_BIGINT : _crow_bigint_to_python,
-    FieldType.C_FLOAT : _crow_float_to_python,
-    FieldType.C_DOUBLE : _crow_double_to_python,
+    FieldType.C_TINYINT: _crow_tinyint_to_python,
+    FieldType.C_SMALLINT: _crow_smallint_to_python,
+    FieldType.C_INT: _crow_int_to_python,
+    FieldType.C_BIGINT: _crow_bigint_to_python,
+    FieldType.C_FLOAT: _crow_float_to_python,
+    FieldType.C_DOUBLE: _crow_double_to_python,
     FieldType.C_BINARY: _crow_binary_to_python_block,
-    FieldType.C_TIMESTAMP : _crow_timestamp_to_python, 
-    FieldType.C_NCHAR : _crow_nchar_to_python_block
+    FieldType.C_TIMESTAMP: _crow_timestamp_to_python,
+    FieldType.C_NCHAR: _crow_nchar_to_python_block,
+    FieldType.C_TINYINT_UNSIGNED: _crow_tinyint_unsigned_to_python,
+    FieldType.C_SMALLINT_UNSIGNED: _crow_smallint_unsigned_to_python,
+    FieldType.C_INT_UNSIGNED: _crow_int_unsigned_to_python,
+    FieldType.C_BIGINT_UNSIGNED: _crow_bigint_unsigned_to_python
 }
 
 # Corresponding TAOS_FIELD structure in C
+
+
 class TaosField(ctypes.Structure):
     _fields_ = [('name', ctypes.c_char * 65),
                 ('type', ctypes.c_char),
                 ('bytes', ctypes.c_short)]
 
 # C interface class
+
+
 class CTaosInterface(object):
 
     libtaos = ctypes.CDLL('libtaos.dylib')
@@ -216,7 +360,7 @@ class CTaosInterface(object):
             except AttributeError:
                 raise AttributeError("config is expected as a str")
 
-        if config != None:
+        if config is not None:
             CTaosInterface.libtaos.taos_options(3, self._config)
 
         CTaosInterface.libtaos.taos_init()
@@ -227,7 +371,13 @@ class CTaosInterface(object):
         """
         return self._config
 
-    def connect(self, host=None, user="root", password="taosdata", db=None, port=0):
+    def connect(
+            self,
+            host=None,
+            user="root",
+            password="taosdata",
+            db=None,
+            port=0):
         '''
         Function to connect to server
 
@@ -236,7 +386,7 @@ class CTaosInterface(object):
         # host
         try:
             _host = ctypes.c_char_p(host.encode(
-                "utf-8")) if host != None else ctypes.c_char_p(None)
+                "utf-8")) if host is not None else ctypes.c_char_p(None)
         except AttributeError:
             raise AttributeError("host is expected as a str")
 
@@ -255,7 +405,7 @@ class CTaosInterface(object):
         # db
         try:
             _db = ctypes.c_char_p(
-                db.encode("utf-8")) if db != None else ctypes.c_char_p(None)
+                db.encode("utf-8")) if db is not None else ctypes.c_char_p(None)
         except AttributeError:
             raise AttributeError("db is expected as a str")
 
@@ -268,11 +418,11 @@ class CTaosInterface(object):
         connection = ctypes.c_void_p(CTaosInterface.libtaos.taos_connect(
             _host, _user, _password, _db, _port))
 
-        if connection.value == None:
+        if connection.value is None:
             print('connect to TDengine failed')
             raise ConnectionError("connect to TDengine failed")
             # sys.exit(1)
-        #else:
+        # else:
         #    print('connect to TDengine success')
 
         return connection
@@ -293,7 +443,8 @@ class CTaosInterface(object):
         @rtype: 0 on success and -1 on failure
         '''
         try:
-            return CTaosInterface.libtaos.taos_query(connection, ctypes.c_char_p(sql.encode('utf-8')))
+            return CTaosInterface.libtaos.taos_query(
+                connection, ctypes.c_char_p(sql.encode('utf-8')))
         except AttributeError:
             raise AttributeError("sql is expected as a string")
         # finally:
@@ -308,7 +459,7 @@ class CTaosInterface(object):
     @staticmethod
     def subscribe(connection, restart, topic, sql, interval):
         """Create a subscription
-         @restart boolean, 
+         @restart boolean,
          @sql string, sql statement for data query, must be a 'select' statement.
          @topic string, name of this subscription
         """
@@ -360,35 +511,49 @@ class CTaosInterface(object):
             result, ctypes.byref(pblock))
         if num_of_rows == 0:
             return None, 0
-        isMicro = (CTaosInterface.libtaos.taos_result_precision(result) == FieldType.C_TIMESTAMP_MICRO)
+        isMicro = (CTaosInterface.libtaos.taos_result_precision(
+            result) == FieldType.C_TIMESTAMP_MICRO)
         blocks = [None] * len(fields)
         fieldL = CTaosInterface.libtaos.taos_fetch_lengths(result)
-        fieldLen = [ele for ele in ctypes.cast(fieldL,  ctypes.POINTER(ctypes.c_int))[:len(fields)]]
+        fieldLen = [
+            ele for ele in ctypes.cast(
+                fieldL, ctypes.POINTER(
+                    ctypes.c_int))[
+                :len(fields)]]
         for i in range(len(fields)):
             data = ctypes.cast(pblock, ctypes.POINTER(ctypes.c_void_p))[i]
             if fields[i]['type'] not in _CONVERT_FUNC_BLOCK:
                 raise DatabaseError("Invalid data type returned from database")
-            blocks[i] = _CONVERT_FUNC_BLOCK[fields[i]['type']](data, num_of_rows, fieldLen[i], isMicro)
+            blocks[i] = _CONVERT_FUNC_BLOCK[fields[i]['type']](
+                data, num_of_rows, fieldLen[i], isMicro)
 
         return blocks, abs(num_of_rows)
+
     @staticmethod
     def fetchRow(result, fields):
         pblock = ctypes.c_void_p(0)
-        pblock = CTaosInterface.libtaos.taos_fetch_row(result)  
-        if pblock : 
+        pblock = CTaosInterface.libtaos.taos_fetch_row(result)
+        if pblock:
             num_of_rows = 1
-            isMicro = (CTaosInterface.libtaos.taos_result_precision(result) == FieldType.C_TIMESTAMP_MICRO)
+            isMicro = (CTaosInterface.libtaos.taos_result_precision(
+                result) == FieldType.C_TIMESTAMP_MICRO)
             blocks = [None] * len(fields)
             fieldL = CTaosInterface.libtaos.taos_fetch_lengths(result)
-            fieldLen = [ele for ele in ctypes.cast(fieldL,  ctypes.POINTER(ctypes.c_int))[:len(fields)]]
+            fieldLen = [
+                ele for ele in ctypes.cast(
+                    fieldL, ctypes.POINTER(
+                        ctypes.c_int))[
+                    :len(fields)]]
             for i in range(len(fields)):
                 data = ctypes.cast(pblock, ctypes.POINTER(ctypes.c_void_p))[i]
                 if fields[i]['type'] not in _CONVERT_FUNC:
-                    raise DatabaseError("Invalid data type returned from database")
+                    raise DatabaseError(
+                        "Invalid data type returned from database")
                 if data is None:
                     blocks[i] = [None]
                 else:
-                    blocks[i] = _CONVERT_FUNC[fields[i]['type']](data, num_of_rows, fieldLen[i], isMicro)         
+                    blocks[i] = _CONVERT_FUNC[fields[i]['type']](
+                        data, num_of_rows, fieldLen[i], isMicro)
         else:
             return None, 0
         return blocks, abs(num_of_rows)

src/connector/python/osx/python3/taos/connection.py

@@ -2,9 +2,11 @@ from .cursor import TDengineCursor
 from .subscription import TDengineSubscription
 from .cinterface import CTaosInterface
 
+
 class TDengineConnection(object):
     """ TDengine connection object
     """
+
     def __init__(self, *args, **kwargs):
         self._conn = None
         self._host = None
@@ -29,7 +31,7 @@ class TDengineConnection(object):
         # password
         if 'password' in kwargs:
             self._password = kwargs['password']
-        
+
         # database
         if 'database' in kwargs:
             self._database = kwargs['database']
@@ -43,7 +45,12 @@ class TDengineConnection(object):
             self._config = kwargs['config']
 
         self._chandle = CTaosInterface(self._config)
-        self._conn = self._chandle.connect(self._host, self._user, self._password, self._database, self._port)
+        self._conn = self._chandle.connect(
+            self._host,
+            self._user,
+            self._password,
+            self._database,
+            self._port)
 
     def close(self):
         """Close current connection.
@@ -55,7 +62,8 @@ class TDengineConnection(object):
         """
         if self._conn is None:
             return None
-        sub = CTaosInterface.subscribe(self._conn, restart, topic, sql, interval)
+        sub = CTaosInterface.subscribe(
+            self._conn, restart, topic, sql, interval)
         return TDengineSubscription(sub)
 
     def cursor(self):
@@ -80,7 +88,8 @@ class TDengineConnection(object):
         """
         pass
 
+
 if __name__ == "__main__":
     conn = TDengineConnection(host='192.168.1.107')
     conn.close()
-    print("Hello world")
+    print("Hello world")

src/connector/python/osx/python3/taos/constants.py

@@ -3,6 +3,7 @@
 
 from .dbapi import *
 
+
 class FieldType(object):
     """TDengine Field Types
     """
@@ -18,13 +19,21 @@ class FieldType(object):
     C_BINARY = 8
     C_TIMESTAMP = 9
     C_NCHAR = 10
+    C_TINYINT_UNSIGNED = 12
+    C_SMALLINT_UNSIGNED = 13
+    C_INT_UNSIGNED = 14
+    C_BIGINT_UNSIGNED = 15
     # NULL value definition
     # NOTE: These values should change according to C definition in tsdb.h
     C_BOOL_NULL = 0x02
     C_TINYINT_NULL = -128
+    C_TINYINT_UNSIGNED_NULL = 255
     C_SMALLINT_NULL = -32768
+    C_SMALLINT_UNSIGNED_NULL = 65535
     C_INT_NULL = -2147483648
+    C_INT_UNSIGNED_NULL = 4294967295
     C_BIGINT_NULL = -9223372036854775808
+    C_BIGINT_UNSIGNED_NULL = 18446744073709551615
     C_FLOAT_NULL = float('nan')
     C_DOUBLE_NULL = float('nan')
     C_BINARY_NULL = bytearray([int('0xff', 16)])

src/connector/python/osx/python3/taos/cursor.py

@@ -5,6 +5,7 @@ import threading
 
 # querySeqNum = 0
 
+
 class TDengineCursor(object):
     """Database cursor which is used to manage the context of a fetch operation.
 
@@ -107,8 +108,8 @@ class TDengineCursor(object):
         # if threading.get_ident() != self._threadId:
         #     info ="Cursor execute:Thread ID not match,creater:"+str(self._threadId)+" caller:"+str(threading.get_ident())
         #     raise OperationalError(info)
-            # print(info)
-            # return None
+        # print(info)
+        # return None
 
         if not operation:
             return None
@@ -137,8 +138,8 @@ class TDengineCursor(object):
         if errno == 0:
             if CTaosInterface.fieldsCount(self._result) == 0:
                 self._affected_rows += CTaosInterface.affectedRows(
-                    self._result )
-                return CTaosInterface.affectedRows(self._result )
+                    self._result)
+                return CTaosInterface.affectedRows(self._result)
             else:
                 self._fields = CTaosInterface.useResult(
                     self._result)
@@ -168,11 +169,26 @@ class TDengineCursor(object):
         if (dataType.upper() == "TINYINT"):
             if (self._description[col][1] == FieldType.C_TINYINT):
                 return True
+        if (dataType.upper() == "TINYINT UNSIGNED"):
+            if (self._description[col][1] == FieldType.C_TINYINT_UNSIGNED):
+                return True
+        if (dataType.upper() == "SMALLINT"):
+            if (self._description[col][1] == FieldType.C_SMALLINT):
+                return True
+        if (dataType.upper() == "SMALLINT UNSIGNED"):
+            if (self._description[col][1] == FieldType.C_SMALLINT_UNSIGNED):
+                return True
         if (dataType.upper() == "INT"):
             if (self._description[col][1] == FieldType.C_INT):
                 return True
+        if (dataType.upper() == "INT UNSIGNED"):
+            if (self._description[col][1] == FieldType.C_INT_UNSIGNED):
+                return True
         if (dataType.upper() == "BIGINT"):
-            if (self._description[col][1] == FieldType.C_INT):
+            if (self._description[col][1] == FieldType.C_BIGINT):
+                return True
+        if (dataType.upper() == "BIGINT UNSIGNED"):
+            if (self._description[col][1] == FieldType.C_BIGINT_UNSIGNED):
                 return True
         if (dataType.upper() == "FLOAT"):
             if (self._description[col][1] == FieldType.C_FLOAT):
@@ -201,10 +217,13 @@ class TDengineCursor(object):
         buffer = [[] for i in range(len(self._fields))]
         self._rowcount = 0
         while True:
-            block, num_of_fields = CTaosInterface.fetchRow(self._result, self._fields)
+            block, num_of_fields = CTaosInterface.fetchRow(
+                self._result, self._fields)
             errno = CTaosInterface.libtaos.taos_errno(self._result)
             if errno != 0:
-                raise ProgrammingError(CTaosInterface.errStr(self._result), errno)
+                raise ProgrammingError(
+                    CTaosInterface.errStr(
+                        self._result), errno)
             if num_of_fields == 0:
                 break
             self._rowcount += num_of_fields
@@ -219,15 +238,20 @@ class TDengineCursor(object):
         buffer = [[] for i in range(len(self._fields))]
         self._rowcount = 0
         while True:
-            block, num_of_fields = CTaosInterface.fetchBlock(self._result, self._fields)
+            block, num_of_fields = CTaosInterface.fetchBlock(
+                self._result, self._fields)
             errno = CTaosInterface.libtaos.taos_errno(self._result)
             if errno != 0:
-                raise ProgrammingError(CTaosInterface.errStr(self._result), errno)
-            if num_of_fields == 0: break
+                raise ProgrammingError(
+                    CTaosInterface.errStr(
+                        self._result), errno)
+            if num_of_fields == 0:
+                break
             self._rowcount += num_of_fields
             for i in range(len(self._fields)):
                 buffer[i].extend(block[i])
         return list(map(tuple, zip(*buffer)))
+
     def nextset(self):
         """
         """
@@ -259,8 +283,8 @@ class TDengineCursor(object):
         # if threading.get_ident() != self._threadId:
         #     info = "Cursor handleresult:Thread ID not match,creater:"+str(self._threadId)+" caller:"+str(threading.get_ident())
         #     raise OperationalError(info)
-            # print(info)
-            # return None
+        # print(info)
+        # return None
 
         self._description = []
         for ele in self._fields:
@@ -268,4 +292,3 @@ class TDengineCursor(object):
                 (ele['name'], ele['type'], None, None, None, None, False))
 
         return self._result
-

src/connector/python/osx/python3/taos/dbapi.py

@@ -4,6 +4,7 @@
 import time
 import datetime
 
+
 class DBAPITypeObject(object):
     def __init__(self, *values):
         self.values = values
@@ -16,23 +17,28 @@ class DBAPITypeObject(object):
         else:
             return -1
 
+
 Date = datetime.date
 Time = datetime.time
 Timestamp = datetime.datetime
 
+
 def DataFromTicks(ticks):
     return Date(*time.localtime(ticks)[:3])
 
+
 def TimeFromTicks(ticks):
     return Time(*time.localtime(ticks)[3:6])
 
+
 def TimestampFromTicks(ticks):
     return Timestamp(*time.localtime(ticks)[:6])
 
+
 Binary = bytes
 
 # STRING = DBAPITypeObject(*constants.FieldType.get_string_types())
 # BINARY = DBAPITypeObject(*constants.FieldType.get_binary_types())
 # NUMBER = BAPITypeObject(*constants.FieldType.get_number_types())
 # DATETIME = DBAPITypeObject(*constants.FieldType.get_timestamp_types())
-# ROWID = DBAPITypeObject()
+# ROWID = DBAPITypeObject()

src/connector/python/osx/python3/taos/error.py

@@ -1,35 +1,41 @@
 """Python exceptions
 """
 
+
 class Error(Exception):
     def __init__(self, msg=None, errno=None):
         self.msg = msg
         self._full_msg = self.msg
         self.errno = errno
-    
+
     def __str__(self):
         return self._full_msg
 
+
 class Warning(Exception):
     """Exception raised for important warnings like data truncations while inserting.
     """
     pass
 
+
 class InterfaceError(Error):
-    """Exception raised for errors that are related to the database interface rather than the database itself. 
+    """Exception raised for errors that are related to the database interface rather than the database itself.
     """
     pass
 
+
 class DatabaseError(Error):
-    """Exception raised for errors that are related to the database. 
+    """Exception raised for errors that are related to the database.
     """
     pass
 
+
 class DataError(DatabaseError):
     """Exception raised for errors that are due to problems with the processed data like division by zero, numeric value out of range.
     """
     pass
 
+
 class OperationalError(DatabaseError):
     """Exception raised for errors that are related to the database's operation and not necessarily under the control of the programmer
     """
@@ -41,17 +47,20 @@ class IntegrityError(DatabaseError):
     """
     pass
 
+
 class InternalError(DatabaseError):
     """Exception raised when the database encounters an internal error.
     """
     pass
 
+
 class ProgrammingError(DatabaseError):
     """Exception raised for programming errors.
     """
     pass
 
+
 class NotSupportedError(DatabaseError):
     """Exception raised in case a method or database API was used which is not supported by the database,.
     """
-    pass
+    pass

src/connector/python/osx/python3/taos/subscription.py

@@ -1,32 +1,33 @@
 from .cinterface import CTaosInterface
 from .error import *
 
+
 class TDengineSubscription(object):
     """TDengine subscription object
     """
+
     def __init__(self, sub):
         self._sub = sub
 
-
     def consume(self):
         """Consume rows of a subscription
         """
         if self._sub is None:
             raise OperationalError("Invalid use of consume")
-        
+
         result, fields = CTaosInterface.consume(self._sub)
         buffer = [[] for i in range(len(fields))]
         while True:
             block, num_of_fields = CTaosInterface.fetchBlock(result, fields)
-            if num_of_fields == 0: break
+            if num_of_fields == 0:
+                break
             for i in range(len(fields)):
                 buffer[i].extend(block[i])
 
         self.fields = fields
         return list(map(tuple, zip(*buffer)))
 
-
-    def close(self, keepProgress = True):
+    def close(self, keepProgress=True):
         """Close the Subscription.
         """
         if self._sub is None:
@@ -38,15 +39,19 @@ class TDengineSubscription(object):
 
 if __name__ == '__main__':
     from .connection import TDengineConnection
-    conn = TDengineConnection(host="127.0.0.1", user="root", password="taosdata", database="test")
+    conn = TDengineConnection(
+        host="127.0.0.1",
+        user="root",
+        password="taosdata",
+        database="test")
 
     # Generate a cursor object to run SQL commands
     sub = conn.subscribe(True, "test", "select * from meters;", 1000)
 
-    for i in range(0,10):
+    for i in range(0, 10):
         data = sub.consume()
         for d in data:
             print(d)
 
     sub.close()
-    conn.close()
+    conn.close()

src/connector/python/windows/python2/taos/__init__.py

@@ -3,7 +3,6 @@ from .connection import TDengineConnection
 from .cursor import TDengineCursor
 
 # Globals
-apilevel = '2.0.3'
 threadsafety = 0
 paramstyle = 'pyformat'
 
@@ -21,4 +20,4 @@ def connect(*args, **kwargs):
 
     @rtype: TDengineConnector
     """
-    return TDengineConnection(*args, **kwargs)
+    return TDengineConnection(*args, **kwargs)

src/connector/python/windows/python3/taos/__init__.py

@@ -3,7 +3,6 @@ from .connection import TDengineConnection
 from .cursor import TDengineCursor
 
 # Globals
-apilevel = '2.0.3'
 threadsafety = 0
 paramstyle = 'pyformat'
 
@@ -21,4 +20,4 @@ def connect(*args, **kwargs):
 
     @rtype: TDengineConnector
     """
-    return TDengineConnection(*args, **kwargs)
+    return TDengineConnection(*args, **kwargs)

src/inc/taos.h

@@ -68,7 +68,7 @@ typedef struct taosField {
   #define DLL_EXPORT 
 #endif
 
-DLL_EXPORT void  taos_init();
+DLL_EXPORT int  taos_init();
 DLL_EXPORT void  taos_cleanup(void);
 DLL_EXPORT int   taos_options(TSDB_OPTION option, const void *arg, ...);
 DLL_EXPORT TAOS *taos_connect(const char *ip, const char *user, const char *pass, const char *db, uint16_t port);

src/inc/ttokendef.h

@@ -122,8 +122,8 @@
 #define TK_UNSIGNED                       103
 #define TK_TAGS                           104
 #define TK_USING                          105
-#define TK_AS                             106
-#define TK_COMMA                          107
+#define TK_COMMA                          106
+#define TK_AS                             107
 #define TK_NULL                           108
 #define TK_SELECT                         109
 #define TK_UNION                          110
@@ -228,6 +228,7 @@
 #define TK_VALUES                         209
 
 
+
 #define TK_SPACE                          300
 #define TK_COMMENT                        301
 #define TK_ILLEGAL                        302

src/kit/shell/src/shellEngine.c

@@ -76,7 +76,11 @@ TAOS *shellInit(SShellArguments *args) {
     args->user = TSDB_DEFAULT_USER;
   }
 
-  taos_init();
+  if (taos_init()) {
+    printf("failed to init taos\n");
+    fflush(stdout);
+    return NULL;
+  }
 
   // Connect to the database.
   TAOS *con = NULL;

src/kit/shell/src/shellMain.c

@@ -110,7 +110,10 @@ int main(int argc, char* argv[]) {
   }
 
   if (args.netTestRole && args.netTestRole[0] != 0) {
-    taos_init();
+    if (taos_init()) {
+      printf("Failed to init taos");
+      exit(EXIT_FAILURE);
+    }
     taosNetTest(args.netTestRole, args.host, args.port, args.pktLen);
     exit(0);
   }

src/kit/taosdemo/taosdemo.c

@@ -1971,7 +1971,6 @@ static int createSuperTable(TAOS * taos, char* dbName, SSuperTable*  superTbls,
 static int createDatabases() {
   TAOS * taos = NULL;
   int    ret = 0;
-  taos_init();
   taos = taos_connect(g_Dbs.host, g_Dbs.user, g_Dbs.password, NULL, g_Dbs.port);
   if (taos == NULL) {
     fprintf(stderr, "Failed to connect to TDengine, reason:%s\n", taos_errstr(NULL));
@@ -4496,7 +4495,6 @@ void *subQueryProcess(void *sarg) {
 
 int queryTestProcess() {
   TAOS * taos = NULL;  
-  taos_init();
   taos = taos_connect(g_queryInfo.host, g_queryInfo.user, g_queryInfo.password, NULL, g_queryInfo.port);
   if (taos == NULL) {
     fprintf(stderr, "Failed to connect to TDengine, reason:%s\n", taos_errstr(NULL));
@@ -4772,7 +4770,6 @@ int subscribeTestProcess() {
   }
 
   TAOS * taos = NULL;  
-  taos_init();
   taos = taos_connect(g_queryInfo.host, g_queryInfo.user, g_queryInfo.password, g_queryInfo.dbName, g_queryInfo.port);
   if (taos == NULL) {
     fprintf(stderr, "Failed to connect to TDengine, reason:%s\n", taos_errstr(NULL));

src/plugins/monitor/src/monMain.c

@@ -103,7 +103,9 @@ int32_t monInitSystem() {
 }
 
 int32_t monStartSystem() {
-  taos_init();
+  if (taos_init()) {
+    return -1;
+  }
   tsMonitor.start = 1;
   monExecuteSQLFp = monExecuteSQL;
   monInfo("monitor module start");

src/query/inc/qSqlparser.h

@@ -76,6 +76,7 @@ typedef struct SQuerySQL {
 typedef struct SCreatedTableInfo {
   SStrToken  name;        // table name token
   SStrToken  stableName;  // super table name token , for using clause
+  SArray    *pTagNames;   // create by using super table, tag name
   SArray    *pTagVals;    // create by using super table, tag value
   char      *fullname;    // table full name
   STagData   tagdata;     // true tag data, super table full name is in STagData
@@ -246,7 +247,7 @@ SCreateTableSQL *tSetCreateSqlElems(SArray *pCols, SArray *pTags, SQuerySQL *pSe
 void tSqlExprNodeDestroy(tSQLExpr *pExpr);
 
 SAlterTableInfo *  tAlterTableSqlElems(SStrToken *pTableName, SArray *pCols, SArray *pVals, int32_t type, int16_t tableTable);
-SCreatedTableInfo createNewChildTableInfo(SStrToken *pTableName, SArray *pTagVals, SStrToken *pToken, SStrToken* igExists);
+SCreatedTableInfo createNewChildTableInfo(SStrToken *pTableName, SArray *pTagNames, SArray *pTagVals, SStrToken *pToken, SStrToken* igExists);
 
 void destroyAllSelectClause(SSubclauseInfo *pSql);
 void doDestroyQuerySql(SQuerySQL *pSql);

src/query/inc/sql.y

@@ -356,9 +356,20 @@ create_stable_args(A) ::= ifnotexists(U) ids(V) cpxName(Z) LP columnlist(X) RP T
 create_from_stable(A) ::= ifnotexists(U) ids(V) cpxName(Z) USING ids(X) cpxName(F) TAGS LP tagitemlist(Y) RP.  {
   X.n += F.n;
   V.n += Z.n;
-  A = createNewChildTableInfo(&X, Y, &V, &U);
+  A = createNewChildTableInfo(&X, NULL, Y, &V, &U);
 }
 
+create_from_stable(A) ::= ifnotexists(U) ids(V) cpxName(Z) USING ids(X) cpxName(F) LP tagNamelist(P) RP TAGS LP tagitemlist(Y) RP.  {
+  X.n += F.n;
+  V.n += Z.n;
+  A = createNewChildTableInfo(&X, P, Y, &V, &U);
+}
+
+%type tagNamelist{SArray*}
+%destructor tagNamelist {taosArrayDestroy($$);}
+tagNamelist(A) ::= tagNamelist(X) COMMA ids(Y).  {taosArrayPush(X, &Y); A = X;  }
+tagNamelist(A) ::= ids(X).                      {A = taosArrayInit(4, sizeof(SStrToken)); taosArrayPush(A, &X);}
+
 // create stream
 // create table table_name as select count(*) from super_table_name interval(time)
 create_table_args(A) ::= ifnotexists(U) ids(V) cpxName(Z) AS select(S). {

src/query/src/qAggMain.c

@@ -2574,12 +2574,16 @@ static void bottom_function(SQLFunctionCtx *pCtx) {
   
   STopBotInfo *pRes = getTopBotOutputInfo(pCtx);
   
+  if ((void *)pRes->res[0] != (void *)((char *)pRes + sizeof(STopBotInfo) + POINTER_BYTES * pCtx->param[0].i64)) {
+    buildTopBotStruct(pRes, pCtx);
+  }
+  
   for (int32_t i = 0; i < pCtx->size; ++i) {
     char *data = GET_INPUT_DATA(pCtx, i);
     TSKEY ts = GET_TS_DATA(pCtx, i);
 
     if (pCtx->hasNull && isNull(data, pCtx->inputType)) {
-      continue;
+      continue; 
     }
     
     notNullElems++;
@@ -2608,6 +2612,11 @@ static void bottom_function_f(SQLFunctionCtx *pCtx, int32_t index) {
   }
   
   STopBotInfo *pRes = getTopBotOutputInfo(pCtx);
+
+  if ((void *)pRes->res[0] != (void *)((char *)pRes + sizeof(STopBotInfo) + POINTER_BYTES * pCtx->param[0].i64)) {
+    buildTopBotStruct(pRes, pCtx);
+  }
+  
   SET_VAL(pCtx, 1, 1);
   do_bottom_function_add(pRes, (int32_t)pCtx->param[0].i64, pData, ts, pCtx->inputType, &pCtx->tagInfo, NULL, 0);
   

src/query/src/qExecutor.c

@@ -3785,7 +3785,7 @@ void setResultRowOutputBufInitCtx(SQueryRuntimeEnv *pRuntimeEnv, SResultRow *pRe
     if (functionId == TSDB_FUNC_TOP || functionId == TSDB_FUNC_BOTTOM || functionId == TSDB_FUNC_DIFF) {
       pCtx->ptsOutputBuf = pRuntimeEnv->pCtx[0].pOutput;
     }
-
+ 
     if (!pCtx->resultInfo->initialized) {
       aAggs[functionId].init(pCtx);
     }

src/query/src/qParserImpl.c

@@ -496,7 +496,8 @@ static void freeVariant(void *pItem) {
 }
 
 void freeCreateTableInfo(void* p) {
-  SCreatedTableInfo* pInfo = (SCreatedTableInfo*) p;
+  SCreatedTableInfo* pInfo = (SCreatedTableInfo*) p;  
+  taosArrayDestroy(pInfo->pTagNames);
   taosArrayDestroyEx(pInfo->pTagVals, freeVariant);
   tfree(pInfo->fullname);
   tfree(pInfo->tagdata.data);
@@ -574,11 +575,12 @@ SCreateTableSQL *tSetCreateSqlElems(SArray *pCols, SArray *pTags, SQuerySQL *pSe
   return pCreate;
 }
 
-SCreatedTableInfo createNewChildTableInfo(SStrToken *pTableName, SArray *pTagVals, SStrToken *pToken, SStrToken* igExists) {
+SCreatedTableInfo createNewChildTableInfo(SStrToken *pTableName, SArray *pTagNames, SArray *pTagVals, SStrToken *pToken, SStrToken* igExists) {
   SCreatedTableInfo info;
   memset(&info, 0, sizeof(SCreatedTableInfo));
 
   info.name       = *pToken;
+  info.pTagNames  = pTagNames;
   info.pTagVals   = pTagVals;
   info.stableName = *pTableName;
   info.igExist    = (igExists->n > 0)? 1:0;

src/tsdb/src/tsdbMeta.c

@@ -50,7 +50,8 @@ int tsdbCreateTable(STsdbRepo *repo, STableCfg *pCfg) {
   STsdbMeta *pMeta = pRepo->tsdbMeta;
   STable *   super = NULL;
   STable *   table = NULL;
-  int        newSuper = 0;
+  bool       newSuper = false;
+  bool       superChanged = false;
   int        tid = pCfg->tableId.tid;
   STable *   pTable = NULL;
 
@@ -85,7 +86,7 @@ int tsdbCreateTable(STsdbRepo *repo, STableCfg *pCfg) {
   if (pCfg->type == TSDB_CHILD_TABLE) {
     super = tsdbGetTableByUid(pMeta, pCfg->superUid);
     if (super == NULL) {  // super table not exists, try to create it
-      newSuper = 1;
+      newSuper = true;
       super = tsdbCreateTableFromCfg(pCfg, true);
       if (super == NULL) goto _err;
     } else {
@@ -93,6 +94,17 @@ int tsdbCreateTable(STsdbRepo *repo, STableCfg *pCfg) {
         terrno = TSDB_CODE_TDB_IVD_CREATE_TABLE_INFO;
         goto _err;
       }
+
+      if (schemaVersion(pCfg->tagSchema) > schemaVersion(super->tagSchema)) {
+        // tag schema out of date, need to update super table tag version
+        STSchema *pOldSchema = super->tagSchema;
+        TSDB_WLOCK_TABLE(super);
+        super->tagSchema = tdDupSchema(pCfg->tagSchema);
+        TSDB_WUNLOCK_TABLE(super);
+        tdFreeSchema(pOldSchema);
+
+        superChanged = true;
+      }
     }
   }
 
@@ -117,7 +129,7 @@ int tsdbCreateTable(STsdbRepo *repo, STableCfg *pCfg) {
   // TODO: refactor duplicate codes
   int   tlen = 0;
   void *pBuf = NULL;
-  if (newSuper) {
+  if (newSuper || superChanged) {
     tlen = tsdbGetTableEncodeSize(TSDB_UPDATE_META, super);
     pBuf = tsdbAllocBytes(pRepo, tlen);
     if (pBuf == NULL) goto _err;

src/wal/CMakeLists.txt

@@ -1,6 +1,8 @@
 CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
 PROJECT(TDengine)
 
+ADD_DEFINITIONS(-DWAL_CHECKSUM_WHOLE)
+
 INCLUDE_DIRECTORIES(inc)
 AUX_SOURCE_DIRECTORY(${CMAKE_CURRENT_SOURCE_DIR}/src SRC)
 

src/wal/src/walWrite.c

@@ -111,6 +111,28 @@ void walRemoveAllOldFiles(void *handle) {
   pthread_mutex_unlock(&pWal->mutex);
 }
 
+#if defined(WAL_CHECKSUM_WHOLE)
+
+static void walUpdateChecksum(SWalHead *pHead) {
+  pHead->sver = 1;
+  pHead->cksum = 0;
+  pHead->cksum = taosCalcChecksum(0, (uint8_t *)pHead, sizeof(*pHead) + pHead->len);
+}
+
+static int walValidateChecksum(SWalHead *pHead) {
+  if (pHead->sver == 0) { // for compatible with wal before sver 1
+    return taosCheckChecksumWhole((uint8_t *)pHead, sizeof(*pHead));
+  } else if (pHead->sver == 1) {
+    uint32_t cksum = pHead->cksum;
+    pHead->cksum = 0;
+    return taosCheckChecksum((uint8_t *)pHead, sizeof(*pHead) + pHead->len, cksum);
+  }
+
+  return 0;
+}
+
+#endif
+
 int32_t walWrite(void *handle, SWalHead *pHead) {
   if (handle == NULL) return -1;
 
@@ -123,7 +145,13 @@ int32_t walWrite(void *handle, SWalHead *pHead) {
   if (pHead->version <= pWal->version) return 0;
 
   pHead->signature = WAL_SIGNATURE;
+#if defined(WAL_CHECKSUM_WHOLE)
+  walUpdateChecksum(pHead);
+#else
+  pHead->sver = 0;
   taosCalcChecksumAppend(0, (uint8_t *)pHead, sizeof(SWalHead));
+#endif
+
   int32_t contLen = pHead->len + sizeof(SWalHead);
 
   pthread_mutex_lock(&pWal->mutex);
@@ -246,16 +274,40 @@ static int32_t walSkipCorruptedRecord(SWal *pWal, SWalHead *pHead, int64_t tfd,
       continue;
     }
 
+#if defined(WAL_CHECKSUM_WHOLE)
+    if (pHead->sver == 0 && walValidateChecksum(pHead)) {
+      wInfo("vgId:%d, wal head cksum check passed, offset:%" PRId64, pWal->vgId, pos);
+      *offset = pos;
+      return TSDB_CODE_SUCCESS;
+    }
+
+    if (pHead->sver == 1) {
+      if (tfRead(tfd, pHead->cont, pHead->len) < pHead->len) {
+	wError("vgId:%d, read to end of corrupted wal file, offset:%" PRId64, pWal->vgId, pos);
+	return TSDB_CODE_WAL_FILE_CORRUPTED;
+      }
+
+      if (walValidateChecksum(pHead)) {
+	wInfo("vgId:%d, wal whole cksum check passed, offset:%" PRId64, pWal->vgId, pos);
+	*offset = pos;
+	return TSDB_CODE_SUCCESS;
+      }
+    }
+
+#else
     if (taosCheckChecksumWhole((uint8_t *)pHead, sizeof(SWalHead))) {
       wInfo("vgId:%d, wal head cksum check passed, offset:%" PRId64, pWal->vgId, pos);
       *offset = pos;
       return TSDB_CODE_SUCCESS;
     }
+
+#endif
   }
 
   return TSDB_CODE_WAL_FILE_CORRUPTED;
 }
 
+
 static int32_t walRestoreWalFile(SWal *pWal, void *pVnode, FWalWrite writeFp, char *name, int64_t fileId) {
   int32_t size = WAL_MAX_SIZE;
   void *  buffer = tmalloc(size);
@@ -293,6 +345,51 @@ static int32_t walRestoreWalFile(SWal *pWal, void *pVnode, FWalWrite writeFp, ch
       break;
     }
 
+#if defined(WAL_CHECKSUM_WHOLE)
+    if (pHead->sver == 0 && !walValidateChecksum(pHead)) {
+      wError("vgId:%d, file:%s, wal head cksum is messed up, hver:%" PRIu64 " len:%d offset:%" PRId64, pWal->vgId, name,
+             pHead->version, pHead->len, offset);
+      code = walSkipCorruptedRecord(pWal, pHead, tfd, &offset);
+      if (code != TSDB_CODE_SUCCESS) {
+        walFtruncate(pWal, tfd, offset);
+        break;
+      }
+    }
+
+    if (pHead->len < 0 || pHead->len > size - sizeof(SWalHead)) {
+      wError("vgId:%d, file:%s, wal head len out of range, hver:%" PRIu64 " len:%d offset:%" PRId64, pWal->vgId, name,
+             pHead->version, pHead->len, offset);
+      code = walSkipCorruptedRecord(pWal, pHead, tfd, &offset);
+      if (code != TSDB_CODE_SUCCESS) {
+        walFtruncate(pWal, tfd, offset);
+        break;
+      }
+    }
+
+    ret = (int32_t)tfRead(tfd, pHead->cont, pHead->len);
+    if (ret < 0) {
+      wError("vgId:%d, file:%s, failed to read wal body since %s", pWal->vgId, name, strerror(errno));
+      code = TAOS_SYSTEM_ERROR(errno);
+      break;
+    }
+
+    if (ret < pHead->len) {
+      wError("vgId:%d, file:%s, failed to read wal body, ret:%d len:%d", pWal->vgId, name, ret, pHead->len);
+      offset += sizeof(SWalHead);
+      continue;
+    }
+
+    if (pHead->sver == 1 && !walValidateChecksum(pHead)) {
+      wError("vgId:%d, file:%s, wal whole cksum is messed up, hver:%" PRIu64 " len:%d offset:%" PRId64, pWal->vgId, name,
+             pHead->version, pHead->len, offset);
+      code = walSkipCorruptedRecord(pWal, pHead, tfd, &offset);
+      if (code != TSDB_CODE_SUCCESS) {
+        walFtruncate(pWal, tfd, offset);
+        break;
+      }
+    }
+
+#else
     if (!taosCheckChecksumWhole((uint8_t *)pHead, sizeof(SWalHead))) {
       wError("vgId:%d, file:%s, wal head cksum is messed up, hver:%" PRIu64 " len:%d offset:%" PRId64, pWal->vgId, name,
              pHead->version, pHead->len, offset);
@@ -326,6 +423,7 @@ static int32_t walRestoreWalFile(SWal *pWal, void *pVnode, FWalWrite writeFp, ch
       continue;
     }
 
+#endif
     offset = offset + sizeof(SWalHead) + pHead->len;
 
     wTrace("vgId:%d, restore wal, fileId:%" PRId64 " hver:%" PRIu64 " wver:%" PRIu64 " len:%d", pWal->vgId,

tests/Jenkinsfile

@@ -109,6 +109,13 @@ pipeline {
                 java --class-path=../../../../src/connector/jdbc/target:$JAVA_HOME/jre/lib/ext -jar target/JDBCDemo-SNAPSHOT-jar-with-dependencies.jar -host 127.0.0.1
                 '''
             }
+            catchError(buildResult: 'SUCCESS', stageResult: 'FAILURE') {
+                sh '''
+                cp -rf ${WKC}/tests/examples/nodejs ${JENKINS_HOME}/workspace/
+                cd ${JENKINS_HOME}/workspace/nodejs
+                node nodejsChecker.js host=localhost
+                '''
+            }
             catchError(buildResult: 'SUCCESS', stageResult: 'FAILURE') {
                 sh '''
                 cd ${JENKINS_HOME}/workspace/C#NET/src/CheckC#

tests/examples/c/demo.c

@@ -62,7 +62,10 @@ int main(int argc, char *argv[]) {
   }
 
   // init TAOS
-  taos_init();
+  if (taos_init()) {
+    exit(1);
+  }
+  
   TAOS *taos = taos_connect(argv[1], "root", "taosdata", NULL, 0);
   if (taos == NULL) {
     printf("failed to connect to server, reason:%s\n", "null taos"/*taos_errstr(taos)*/);

tests/examples/c/prepare.c

@@ -23,7 +23,10 @@ int main(int argc, char *argv[])
   }
 
   // init TAOS
-  taos_init();
+  if (taos_init()) {
+    printf("failed to init taos\n");
+    exit(1);
+  }
 
   taos = taos_connect(argv[1], "root", "taosdata", NULL, 0);
   if (taos == NULL) {

tests/examples/c/stream.c

@@ -55,7 +55,10 @@ int main(int argc, char *argv[])
   } 
 
   // init TAOS
-  taos_init();
+  if (taos_init()) {
+    printf("failed to init taos\n");
+    exit(1);
+  }
 
   strcpy(db_name, argv[2]);
   strcpy(tbl_name, argv[3]);

tests/examples/c/subscribe.c

@@ -217,7 +217,10 @@ int main(int argc, char *argv[]) {
   }
 
   // init TAOS
-  taos_init();
+  if (taos_init()) {
+    printf("failed to init taos\n");
+    exit(1);
+  }
 
   TAOS* taos = taos_connect(host, user, passwd, "", 0);
   if (taos == NULL) {

tests/perftest-scripts/perftest-query.sh

@@ -39,6 +39,8 @@ function buildTDengine {
 	cd $WORK_DIR/TDengine
 
 	git remote update > /dev/null
+	git reset --hard HEAD
+	git checkout develop
 	REMOTE_COMMIT=`git rev-parse --short remotes/origin/develop`
 	LOCAL_COMMIT=`git rev-parse --short @`
 
@@ -54,15 +56,16 @@ function buildTDengine {
 		cd debug
 		rm -rf *
 		cmake .. > /dev/null
-		make > /dev/null
-		make install
+		make && make install > /dev/null		
 	fi
 }
 
 function runQueryPerfTest {
 	[ -f $PERFORMANCE_TEST_REPORT ] && rm $PERFORMANCE_TEST_REPORT
 	nohup $WORK_DIR/TDengine/debug/build/bin/taosd -c /etc/taosperf/ > /dev/null 2>&1 &
-	echoInfo "Run Performance Test"
+	echoInfo "Wait TDengine to start"
+	sleep 60
+	echoInfo "Run Performance Test"	
 	cd $WORK_DIR/TDengine/tests/pytest
 	
 	python3 query/queryPerformance.py -c $LOCAL_COMMIT | tee -a $PERFORMANCE_TEST_REPORT
@@ -104,6 +107,7 @@ function sendReport {
 stopTaosd
 buildTDengine
 runQueryPerfTest
+stopTaosd
 
 echoInfo "Send Report"
 sendReport

tests/pytest/crash_gen/crash_gen_main.py

@@ -354,10 +354,11 @@ class ThreadCoordinator:
                 # end, and maybe signal them to stop
             if isinstance(err, CrashGenError): # our own transition failure
                 Logging.info("State transition error")
+                # TODO: saw an error here once, let's print out stack info for err?
                 traceback.print_stack()
                 transitionFailed = True
                 self._te = None  # Not running any more
-                self._execStats.registerFailure("State transition error")
+                self._execStats.registerFailure("State transition error: {}".format(err))
             else:
                 raise
         # return transitionFailed # Why did we have this??!!
@@ -882,8 +883,12 @@ class StateMechine:
         self._stateWeights = [1, 2, 10, 40]
 
     def init(self, dbc: DbConn): # late initailization, don't save the dbConn
-        self._curState = self._findCurrentState(dbc)  # starting state
-        Logging.debug("Found Starting State: {}".format(self._curState))
+        try:
+            self._curState = self._findCurrentState(dbc)  # starting state
+        except taos.error.ProgrammingError as err:            
+            Logging.error("Failed to initialized state machine, cannot find current state: {}".format(err))
+            traceback.print_stack()
+            raise # re-throw
 
     # TODO: seems no lnoger used, remove?
     def getCurrentState(self):
@@ -951,6 +956,8 @@ class StateMechine:
 
     # We transition the system to a new state by examining the current state itself
     def transition(self, tasks, dbc: DbConn):
+        global gSvcMgr
+        
         if (len(tasks) == 0):  # before 1st step, or otherwise empty
             Logging.debug("[STT] Starting State: {}".format(self._curState))
             return  # do nothing
@@ -2370,7 +2377,7 @@ class MainExec:
             '-n',
             '--dynamic-db-table-names',
             action='store_true',
-            help='Use non-fixed names for dbs/tables, useful for multi-instance executions (default: false)')        
+            help='Use non-fixed names for dbs/tables, for -b, useful for multi-instance executions (default: false)')        
         parser.add_argument(
             '-o',
             '--num-dnodes',

tests/pytest/crash_gen/db.py

@@ -15,6 +15,7 @@ from util.log import *
 from .misc import Logging, CrashGenError, Helper, Dice
 import os
 import datetime
+import traceback
 # from .service_manager import TdeInstance
 
 class DbConn:
@@ -349,6 +350,7 @@ class DbConnNative(DbConn):
 
     def execute(self, sql):
         if (not self.isOpen):
+            traceback.print_stack()
             raise CrashGenError(
                 "Cannot exec SQL unless db connection is open", CrashGenError.DB_CONNECTION_NOT_OPEN)
         Logging.debug("[SQL] Executing SQL: {}".format(sql))
@@ -361,6 +363,7 @@ class DbConnNative(DbConn):
 
     def query(self, sql):  # return rows affected
         if (not self.isOpen):
+            traceback.print_stack()
             raise CrashGenError(
                 "Cannot query database until connection is open, restarting?", CrashGenError.DB_CONNECTION_NOT_OPEN)
         Logging.debug("[SQL] Executing SQL: {}".format(sql))

tests/pytest/fulltest.sh

@@ -66,7 +66,7 @@ python3 ./test.py -f tag_lite/int.py
 python3 ./test.py -f tag_lite/set.py
 python3 ./test.py -f tag_lite/smallint.py
 python3 ./test.py -f tag_lite/tinyint.py
-
+python3 ./test.py -f tag_lite/alter_tag.py
 #python3 ./test.py -f dbmgmt/database-name-boundary.py
 
 python3 ./test.py -f import_merge/importBlock1HO.py

tests/pytest/insert/basic_unsigned.py

@@ -0,0 +1,56 @@
+###################################################################
+#           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
+from util.log import *
+from util.cases import *
+from util.sql import *
+
+
+class TDTestCase:
+    def init(self, conn, logSql):
+        tdLog.debug("start to execute %s" % __file__)
+        tdSql.init(conn.cursor(), logSql)
+
+    def run(self):
+        tdSql.prepare()
+
+        ret = tdSql.execute(
+            'create table tb (ts timestamp, speed int unsigned)')
+
+        insertRows = 10
+        tdLog.info("insert %d rows" % (insertRows))
+        for i in range(0, insertRows):
+            ret = tdSql.execute(
+                'insert into tb values (now + %dm, %d)' %
+                (i, i))
+
+        tdLog.info("insert earlier data")
+        tdSql.execute('insert into tb values (now - 5m , 10)')
+        tdSql.execute('insert into tb values (now - 6m , 10)')
+        tdSql.execute('insert into tb values (now - 7m , 10)')
+        tdSql.execute('insert into tb values (now - 8m , 4294967294)')
+
+        tdSql.error('insert into tb values (now - 9m, -1)')
+        tdSql.error('insert into tb values (now - 9m, 4294967295)')
+
+        tdSql.query("select * from tb")
+        tdSql.checkRows(insertRows + 4)
+
+    def stop(self):
+        tdSql.close()
+        tdLog.success("%s successfully executed" % __file__)
+
+
+tdCases.addWindows(__file__, TDTestCase())
+tdCases.addLinux(__file__, TDTestCase())

tests/pytest/pytest_1.sh

@@ -19,7 +19,7 @@ python3 ./test.py -f insert/randomNullCommit.py
 #python3 insert/retentionpolicy.py
 python3 ./test.py -f insert/alterTableAndInsert.py
 python3 ./test.py -f insert/insertIntoTwoTables.py
-#python3 ./test.py -f insert/before_1970.py
+python3 ./test.py -f insert/before_1970.py
 python3 bug2265.py
 
 #table

tests/pytest/tag_lite/alter_tag.py

@@ -0,0 +1,52 @@
+###################################################################
+#           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 tdLog
+from util.cases import tdCases
+from util.sql import tdSql
+from util.dnodes import tdDnodes
+
+class TDTestCase:
+    def init(self, conn, logSql):
+        tdLog.debug("start to execute %s" % __file__)
+        tdSql.init(conn.cursor(), logSql)
+
+        self.ts = 1538548685000
+
+    def run(self):
+        tdSql.prepare()
+
+        print("==============step1")
+        tdSql.execute(
+            "CREATE TABLE IF NOT EXISTS ampere (ts TIMESTAMP(8),ampere DOUBLE(8)) TAGS (device_name BINARY(50),build_id BINARY(50),project_id BINARY(50),alias BINARY(50))")
+        tdSql.execute("insert into d1001 using ampere tags('test', '2', '2', '2') VALUES (now, 123)")
+        tdSql.execute("ALTER TABLE ampere ADD TAG variable_id BINARY(50)")
+
+        print("==============step2")
+
+        tdSql.execute("insert into d1002 using ampere tags('test', '2', '2', '2', 'test') VALUES (now, 124)")
+
+        tdSql.query("select * from ampere")
+        tdSql.checkRows(2)
+        tdSql.checkData(0, 6, None)
+        tdSql.checkData(1, 6, 'test')        
+
+    def stop(self):
+        tdSql.close()
+        tdLog.success("%s successfully executed" % __file__)
+
+
+tdCases.addWindows(__file__, TDTestCase())
+tdCases.addLinux(__file__, TDTestCase())

tests/script/general/parser/create_tb_with_tag_name.sim

@@ -0,0 +1,162 @@
+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 maxtablesPerVnode -v 2
+system sh/exec.sh -n dnode1 -s start
+
+sleep 100
+sql connect
+print ======================== dnode1 start
+
+$db = testdb
+
+sql create database $db
+sql use $db
+
+sql create stable st2 (ts timestamp, f1 int) tags (id int, t1 int, t2 nchar(4), t3 double)
+
+
+sql insert into tb1 using st2 (id, t1) tags(1,2) values (now, 1)
+
+sql select id,t1,t2,t3 from tb1
+
+if $rows != 1 then
+  return -1
+endi
+
+if $data00 != 1 then 
+  return -1
+endi
+if $data01 != 2 then 
+  return -1
+endi
+if $data02 != NULL then 
+  return -1
+endi
+if $data03 != NULL then 
+  return -1
+endi
+
+sql create table tb2 using st2 (t2,t3) tags ("12",22.0)
+
+sql select id,t1,t2,t3 from tb2;
+
+if $rows != 1 then
+  return -1
+endi
+
+if $data00 != NULL then 
+  return -1
+endi
+if $data01 != NULL then 
+  return -1
+endi
+if $data02 != 12 then 
+  return -1
+endi
+if $data03 != 22.000000000 then 
+  return -1
+endi
+
+
+sql create table tb3 using st2 tags (1,2,"3",33.0);
+
+sql select id,t1,t2,t3 from tb3;
+
+
+if $rows != 1 then
+  return -1
+endi
+
+if $data00 != 1 then 
+  return -1
+endi
+if $data01 != 2 then 
+  return -1
+endi
+if $data02 != 3 then 
+  return -1
+endi
+if $data03 != 33.000000000 then 
+  return -1
+endi
+
+sql insert into tb4 using st2 tags(1,2,"33",44.0) values (now, 1);
+
+sql select id,t1,t2,t3 from tb4;
+
+if $rows != 1 then
+  return -1
+endi
+
+if $data00 != 1 then 
+  return -1
+endi
+if $data01 != 2 then 
+  return -1
+endi
+if $data02 != 33 then 
+  return -1
+endi
+if $data03 != 44.000000000 then 
+  return -1
+endi
+
+sql_error create table tb5 using st2() tags (3,3,"3",33.0);
+
+sql_error create table tb6 using st2 (id,t1) tags (3,3,"3",33.0);
+
+sql_error create table tb7 using st2 (id,t1) tags (3);
+
+sql_error create table tb8 using st2 (ide) tags (3);
+
+sql_error create table tb9 using st2 (id);
+
+sql_error create table tb10 using st2 (id t1) tags (1,1);
+
+sql_error create table tb10 using st2 (id,,t1) tags (1,1,1);
+
+sql_error create table tb11 using st2 (id,t1,) tags (1,1,1);
+
+sql create table tb12 using st2 (t1,id) tags (2,1);
+
+sql select id,t1,t2,t3 from tb12;
+if $rows != 1 then
+  return -1
+endi
+
+if $data00 != 1 then 
+  return -1
+endi
+if $data01 != 2 then 
+  return -1
+endi
+if $data02 != NULL then 
+  return -1
+endi
+if $data03 != NULL then 
+  return -1
+endi
+
+sql create table tb13 using st2 ("t1",'id') tags (2,1);
+
+sql select id,t1,t2,t3 from tb13;
+
+if $rows != 1 then
+  return -1
+endi
+
+if $data00 != 1 then 
+  return -1
+endi
+if $data01 != 2 then 
+  return -1
+endi
+if $data02 != NULL then 
+  return -1
+endi
+if $data03 != NULL then 
+  return -1
+endi
+
+system sh/exec.sh -n dnode1 -s stop -x SIGINT

tests/script/jenkins/basic_2.txt

@@ -72,4 +72,3 @@ cd ../../../debug; make
 ./test.sh -f unique/cluster/cache.sim
 ./test.sh -f unique/cluster/vgroup100.sim
 
-./test.sh -f unique/column/replica3.sim

tests/script/jenkins/basic_4.txt

@@ -35,4 +35,6 @@
 ./test.sh -f general/stable/refcount.sim
 ./test.sh -f general/stable/show.sim
 ./test.sh -f general/stable/values.sim
-./test.sh -f general/stable/vnode3.sim
+./test.sh -f general/stable/vnode3.sim
+
+./test.sh -f unique/column/replica3.sim

tests/tsim/src/simSystem.c

@@ -81,7 +81,9 @@ char *simParseHostName(char *varName) {
 }
 
 bool simSystemInit() {
-  taos_init();
+  if (taos_init()) {
+    return false;
+  }
   taosGetFqdn(simHostName);
   simInitsimCmdList();
   memset(simScriptList, 0, sizeof(SScript *) * MAX_MAIN_SCRIPT_NUM);