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TDengine
TDengine
提交 90cb6f00 编写于 作者: S shenglian zhou
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Merge branch 'develop' into szhou/feature/nchar-subquery

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浏览文件 @ 90cb6f00
...@@ -116,7 +116,7 @@ def pre_test(){ ...@@ -116,7 +116,7 @@ def pre_test(){
make > /dev/null make > /dev/null
make install > /dev/null make install > /dev/null
cd ${WKC}/tests cd ${WKC}/tests
pip3 install ${WKC}/src/connector/python/ pip3 install taospy
''' '''
return 1 return 1
} }
......
Jenkinsfile2
浏览文件 @ 90cb6f00
...@@ -21,21 +21,25 @@ def sync_source() { ...@@ -21,21 +21,25 @@ def sync_source() {
if (env.CHANGE_TARGET == 'master') { if (env.CHANGE_TARGET == 'master') {
sh ''' sh '''
cd ${WKC} cd ${WKC}
git clean -fxd
git checkout master git checkout master
''' '''
} else if (env.CHANGE_TARGET == '2.0') { } else if (env.CHANGE_TARGET == '2.0') {
sh ''' sh '''
cd ${WKC} cd ${WKC}
git clean -fxd
git checkout 2.0 git checkout 2.0
''' '''
} else if (env.CHANGE_TARGET == '2.4') { } else if (env.CHANGE_TARGET == '2.4') {
sh ''' sh '''
cd ${WKC} cd ${WKC}
git clean -fxd
git checkout 2.4 git checkout 2.4
''' '''
} else { } else {
sh ''' sh '''
cd ${WKC} cd ${WKC}
git clean -fxd
git checkout develop git checkout develop
''' '''
} }
...@@ -83,6 +87,16 @@ def sync_source() { ...@@ -83,6 +87,16 @@ def sync_source() {
cd ${WKC} cd ${WKC}
git fetch origin +refs/pull/${CHANGE_ID}/merge git fetch origin +refs/pull/${CHANGE_ID}/merge
git checkout -qf FETCH_HEAD git checkout -qf FETCH_HEAD
if [ ! -d src/connector/python/.github ]; then
rm -rf src/connector/python/* || :
rm -rf src/connector/python/.* || :
git clone --depth 1 https://github.com/taosdata/taos-connector-python src/connector/python || echo "failed to clone python connector"
else
cd src/connector/python || echo "src/connector/python not exist"
git pull || :
cd ${WKC}
fi
''' '''
} else if (env.CHANGE_URL =~ /\/TDinternal\//) { } else if (env.CHANGE_URL =~ /\/TDinternal\//) {
sh ''' sh '''
...@@ -90,6 +104,16 @@ def sync_source() { ...@@ -90,6 +104,16 @@ def sync_source() {
cd ${WK} cd ${WK}
git fetch origin +refs/pull/${CHANGE_ID}/merge git fetch origin +refs/pull/${CHANGE_ID}/merge
git checkout -qf FETCH_HEAD git checkout -qf FETCH_HEAD
if [ ! -d community/src/connector/python/.github ]; then
rm -rf community/src/connector/python/* || :
rm -rf community/src/connector/python/.* || :
git clone --depth 1 https://github.com/taosdata/taos-connector-python community/src/connector/python || echo "failed to clone python connector"
else
cd community/src/connector/python || echo "community/src/connector/python not exist"
git pull || :
cd ${WK}
fi
''' '''
} else { } else {
sh ''' sh '''
......
docs-cn/06-insert-data/01-sql-writing.mdx
浏览文件 @ 90cb6f00
...@@ -118,6 +118,6 @@ TDengine 也提供了支持参数绑定的 Prepare API，与 MySQL 一样，这 ...@@ -118,6 +118,6 @@ TDengine 也提供了支持参数绑定的 Prepare API，与 MySQL 一样，这
:::note :::note
只有使用本地驱动方式连接连接，才能使用动态绑定功能。 只有使用本地驱动方式建立连接，才能使用动态绑定功能。
::: :::
docs-cn/06-insert-data/04-opentsdb-json.mdx
浏览文件 @ 90cb6f00
...@@ -39,3 +39,24 @@ import CJson from "./_c_opts_json.mdx"; ...@@ -39,3 +39,24 @@ import CJson from "./_c_opts_json.mdx";
<CJson /> <CJson />
</TabItem> </TabItem>
</Tabs> </Tabs>
以上示例代码会自动创建 2 个超级表， 每个超级表有 2 条数据。
```cmd
taos> use test;
Database changed.
taos> show stables;
name | created_time | columns | tags | tables |
============================================================================================
meters.current | 2022-03-29 16:05:25.193 | 2 | 2 | 1 |
meters.voltage | 2022-03-29 16:05:25.200 | 2 | 2 | 1 |
Query OK, 2 row(s) in set (0.001954s)
taos> select * from `meters.current`;
ts | value | groupid | location |
===================================================================================================================
2022-03-28 09:56:51.249 | 10.300000000 | 2.000000000 | Beijing.Chaoyang |
2022-03-28 09:56:51.250 | 12.600000000 | 2.000000000 | Beijing.Chaoyang |
Query OK, 2 row(s) in set (0.004076s)
```
docs-cn/06-insert-data/_java_line.mdx
浏览文件 @ 90cb6f00
```java
{{#include docs-examples/java/src/main/java/com/taos/example/LineProtocolExample.java}}
```
docs-cn/06-insert-data/_java_opts_json.mdx
浏览文件 @ 90cb6f00
```java
{{#include docs-examples/java/src/main/java/com/taos/example/JSONProtocolExample.java}}
```
docs-cn/06-insert-data/_java_opts_telnet.mdx
浏览文件 @ 90cb6f00
```java
{{#include docs-examples/java/src/main/java/com/taos/example/TelnetLineProtocolExample.java}}
```
docs-cn/06-insert-data/_py_line.mdx
浏览文件 @ 90cb6f00
```py
{{#include docs-examples/python/line_protocol_example.py}}
```
docs-cn/06-insert-data/_py_opts_json.mdx
浏览文件 @ 90cb6f00
```py
{{#include docs-examples/python/json_protocol_example.py}}
```
docs-cn/06-insert-data/_py_opts_telnet.mdx
浏览文件 @ 90cb6f00
```py
{{#include docs-examples/python/telnet_line_protocol_example.py}}
```
docs-cn/06-insert-data/_py_sql.mdx
浏览文件 @ 90cb6f00
```py
{{#include docs-examples/python/native_insert_example.py}}
```
docs-cn/06-insert-data/_py_stmt.mdx
浏览文件 @ 90cb6f00
```py title=一次绑定一行
{{#include docs-examples/python/bind_param_example.py}}
```
```py title=一次绑定多行
{{#include docs-examples/python/multi_bind_example.py:bind_batch}}
```
docs-cn/07-query-data/_py.mdx
浏览文件 @ 90cb6f00
通过迭代逐行获取查询结果。
```py
{{#include docs-examples/python/query_example.py:iter}}
```
一次获取所有查询结果，并把每一行转化为一个字典返回。
```py
{{#include docs-examples/python/query_example.py:fetch_all}}
```
docs-cn/07-query-data/_py_async.mdx
浏览文件 @ 90cb6f00
```py
{{#include docs-examples/python/async_query_example.py}}
```
:::note
这个示例程序，目前在 Windows 系统上还无法运行
:::
docs-cn/14-reference/03-connector/cshapr.mdx → docs-cn/14-reference/03-connector/csharp.mdx
浏览文件 @ 90cb6f00
...@@ -7,15 +7,15 @@ sidebar_label: C# ...@@ -7,15 +7,15 @@ sidebar_label: C#
- C# 连接器支持的系统有：Linux 64/Windows x64/Windows x86 - C# 连接器支持的系统有：Linux 64/Windows x64/Windows x86
- C# 连接器现在也支持从[Nuget 下载引用](https://www.nuget.org/packages/TDengine.Connector/) - C# 连接器现在也支持从 [Nuget 下载引用](https://www.nuget.org/packages/TDengine.Connector/)
- 在 Windows 系统上，C# 应用程序可以使用 TDengine 的原生 C 接口来执行所有数据库操作，后续版本将提供 ORM（Dapper）框架驱动。 - 在 Windows 系统上，C# 应用程序可以使用 TDengine 的原生 C 接口来执行所有数据库操作，后续版本将提供 ORM（Dapper）框架驱动。
## 安装准备 ## 安装准备
- 应用驱动安装请参考[安装连接器驱动步骤](https://www.taosdata.com/cn/documentation/connector#driver)。 - 应用驱动安装请参考[安装连接器驱动步骤](/reference/connector/#安装客户端驱动)。
- 接口文件 TDengineDrivercs.cs 和参考程序示例 TDengineTest.cs 均位于 Windows 客户端 install_directory/examples/C#目录下。 - 接口文件 TDengineDrivercs.cs 和参考程序示例 TDengineTest.cs 均位于 Windows 客户端 install_directory/examples/C# 目录下。
- 安装[.NET SDK](https://dotnet.microsoft.com/download) - 安装 [.NET SDK](https://dotnet.microsoft.com/download)
## 示例程序 ## 示例程序
......
docs-cn/14-reference/03-connector/java.mdx
浏览文件 @ 90cb6f00
...@@ -357,7 +357,7 @@ JDBC 连接器可能报错的错误码包括 3 种：JDBC driver 本身的报错 ...@@ -357,7 +357,7 @@ JDBC 连接器可能报错的错误码包括 3 种：JDBC driver 本身的报错
- https://github.com/taosdata/TDengine/blob/develop/src/connector/jdbc/src/main/java/com/taosdata/jdbc/TSDBErrorNumbers.java - https://github.com/taosdata/TDengine/blob/develop/src/connector/jdbc/src/main/java/com/taosdata/jdbc/TSDBErrorNumbers.java
- https://github.com/taosdata/TDengine/blob/develop/src/inc/taoserror.h - https://github.com/taosdata/TDengine/blob/develop/src/inc/taoserror.h
### <a class="anchor" id="stmt-java"></a>通过参数绑定写入数据 ### 通过参数绑定写入数据
从 2.1.2.0 版本开始，TDengine 的 JDBC-JNI 实现大幅改进了参数绑定方式对数据写入（INSERT）场景的支持。采用这种方式写入数据时，能避免 SQL 语法解析的资源消耗，从而在很多情况下显著提升写入性能。 从 2.1.2.0 版本开始，TDengine 的 JDBC-JNI 实现大幅改进了参数绑定方式对数据写入（INSERT）场景的支持。采用这种方式写入数据时，能避免 SQL 语法解析的资源消耗，从而在很多情况下显著提升写入性能。
注意： 注意：
...@@ -626,7 +626,47 @@ public void setString(int columnIndex, ArrayList<String> list, int size) throws ...@@ -626,7 +626,47 @@ public void setString(int columnIndex, ArrayList<String> list, int size) throws
public void setNString(int columnIndex, ArrayList<String> list, int size) throws SQLException public void setNString(int columnIndex, ArrayList<String> list, int size) throws SQLException
``` ```
### <a class="anchor" id="set-client-configuration"></a>设置客户端参数 ### 无模式写入
从 2.2.0.0 版本开始，TDengine 增加了对无模式写入功能。无模式写入兼容 InfluxDB 的 行协议（Line Protocol）、OpenTSDB 的 telnet 行协议和 OpenTSDB 的 JSON 格式协议。详情请参见[无模式写入](https://www.taosdata.com/docs/cn/v2.0/insert#schemaless)。
注意：
- JDBC-RESTful 实现并不提供无模式写入这种使用方式
- 以下示例代码基于 taos-jdbcdriver-2.0.36
示例代码：
```java
public class SchemalessInsertTest {
private static final String host = "127.0.0.1";
private static final String lineDemo = "st,t1=3i64,t2=4f64,t3=\"t3\" c1=3i64,c3=L\"passit\",c2=false,c4=4f64 1626006833639000000";
private static final String telnetDemo = "stb0_0 1626006833 4 host=host0 interface=eth0";
private static final String jsonDemo = "{\"metric\": \"meter_current\",\"timestamp\": 1346846400,\"value\": 10.3, \"tags\": {\"groupid\": 2, \"location\": \"Beijing\", \"id\": \"d1001\"}}";
public static void main(String[] args) throws SQLException {
final String url = "jdbc:TAOS://" + host + ":6030/?user=root&password=taosdata";
try (Connection connection = DriverManager.getConnection(url)) {
init(connection);
SchemalessWriter writer = new SchemalessWriter(connection);
writer.write(lineDemo, SchemalessProtocolType.LINE, SchemalessTimestampType.NANO_SECONDS);
writer.write(telnetDemo, SchemalessProtocolType.TELNET, SchemalessTimestampType.MILLI_SECONDS);
writer.write(jsonDemo, SchemalessProtocolType.JSON, SchemalessTimestampType.NOT_CONFIGURED);
}
}
private static void init(Connection connection) throws SQLException {
try (Statement stmt = connection.createStatement()) {
stmt.executeUpdate("drop database if exists test_schemaless");
stmt.executeUpdate("create database if not exists test_schemaless");
stmt.executeUpdate("use test_schemaless");
}
}
}
```
### 设置客户端参数
从 TDengine-2.3.5.0 版本开始，jdbc driver 支持在应用的第一次连接中，设置 TDengine 的客户端参数。Driver 支持 JDBC-JNI 方式中，通过 jdbcUrl 和 properties 两种方式设置 client parameter。 从 TDengine-2.3.5.0 版本开始，jdbc driver 支持在应用的第一次连接中，设置 TDengine 的客户端参数。Driver 支持 JDBC-JNI 方式中，通过 jdbcUrl 和 properties 两种方式设置 client parameter。
注意： 注意：
...@@ -687,7 +727,7 @@ public class ClientParameterSetting { ...@@ -687,7 +727,7 @@ public class ClientParameterSetting {
} }
``` ```
## <a class="anchor" id="subscribe"></a>订阅 ## 订阅
### 创建 ### 创建
......
docs-cn/14-reference/03-connector/node.mdx
浏览文件 @ 90cb6f00
...@@ -15,7 +15,7 @@ Node.js 连接器的使用参见[视频教程](https://www.taosdata.com/blog/202 ...@@ -15,7 +15,7 @@ Node.js 连接器的使用参见[视频教程](https://www.taosdata.com/blog/202
### 安装准备 ### 安装准备
- 应用驱动安装请参考[安装连接器驱动步骤](https://www.taosdata.com/cn/documentation/connector#driver)。 - 应用驱动安装请参考[安装连接器驱动步骤](/reference/connector/#安装客户端驱动)。
### 安装 Node.js 连接器 ### 安装 Node.js 连接器
......
docs-cn/14-reference/03-connector/python.mdx
浏览文件 @ 90cb6f00
...@@ -15,7 +15,7 @@ Python 连接器支持的系统有：Linux 64/Windows x64 ...@@ -15,7 +15,7 @@ Python 连接器支持的系统有：Linux 64/Windows x64
安装前准备： 安装前准备：
- 已安装好 TDengine 应用驱动，请参考[安装连接器驱动步骤](https://www.taosdata.com/cn/documentation/connector#driver) - 已安装好 TDengine 应用驱动，请参考[安装连接器驱动步骤](/reference/connector/#安装客户端驱动)
- 已安装 python 2.7 or >= 3.4 - 已安装 python 2.7 or >= 3.4
- 已安装 pip - 已安装 pip
...@@ -281,75 +281,3 @@ k1 = conn.query("select info->'k1' as k1 from s1").fetch_all_into_dict() ...@@ -281,75 +281,3 @@ k1 = conn.query("select info->'k1' as k1 from s1").fetch_all_into_dict()
- _connect_ 方法 - _connect_ 方法
用于生成 taos.TaosConnection 的实例。 用于生成 taos.TaosConnection 的实例。
## <a class="anchor" id="restful"></a>RESTful Connector
为支持各种不同类型平台的开发，TDengine 提供符合 REST 设计标准的 API，即 RESTful API。为最大程度降低学习成本，不同于其他数据库 RESTful API 的设计方法，TDengine 直接通过 HTTP POST 请求 BODY 中包含的 SQL 语句来操作数据库，仅需要一个 URL。RESTful 连接器的使用参见[视频教程](https://www.taosdata.com/blog/2020/11/11/1965.html)。
注意：与原生连接器的一个区别是，RESTful 接口是无状态的，因此 `USE db_name` 指令没有效果，所有对表名、超级表名的引用都需要指定数据库名前缀。（从 2.2.0.0 版本开始，支持在 RESTful url 中指定 db_name，这时如果 SQL 语句中没有指定数据库名前缀的话，会使用 url 中指定的这个 db_name。从 2.4.0.0 版本开始，RESTful 默认有 taosAdapter 提供，要求必须在 url 中指定 db_name。）
### 安装
RESTful 接口不依赖于任何 TDengine 的库，因此客户端不需要安装任何 TDengine 的库，只要客户端的开发语言支持 HTTP 协议即可。
### 验证
在已经安装 TDengine 服务器端的情况下，可以按照如下方式进行验证。
下面以 Ubuntu 环境中使用 curl 工具（确认已经安装）来验证 RESTful 接口的正常。
下面示例是列出所有的数据库，请把 h1.taosdata.com 和 6041（缺省值）替换为实际运行的 TDengine 服务 fqdn 和端口号：
```html
curl -H 'Authorization: Basic cm9vdDp0YW9zZGF0YQ==' -d 'show databases;'
h1.taosdata.com:6041/rest/sql
```
返回值结果如下表示验证通过：
```json
{
"status": "succ",
"head": [
"name",
"created_time",
"ntables",
"vgroups",
"replica",
"quorum",
"days",
"keep1,keep2,keep(D)",
"cache(MB)",
"blocks",
"minrows",
"maxrows",
"wallevel",
"fsync",
"comp",
"precision",
"status"
],
"data": [
[
"log",
"2020-09-02 17:23:00.039",
4,
1,
1,
1,
10,
"30,30,30",
1,
3,
100,
4096,
1,
3000,
2,
"us",
"ready"
]
],
"rows": 1
}
```
docs-cn/14-reference/13-schemaless/13-schemaless.md
浏览文件 @ 90cb6f00
...@@ -6,7 +6,6 @@ ...@@ -6,7 +6,6 @@
从 2.2.0.0 版本开始，提供调用 Schemaless 写入方式，可以免于预先创建超级表/子表的步骤，随着数据写入接口能够自动创建与数据对应的存储结构。并且在必要时，Schemaless 从 2.2.0.0 版本开始，提供调用 Schemaless 写入方式，可以免于预先创建超级表/子表的步骤，随着数据写入接口能够自动创建与数据对应的存储结构。并且在必要时，Schemaless
将自动增加必要的数据列，保证用户写入的数据可以被正确存储。 将自动增加必要的数据列，保证用户写入的数据可以被正确存储。
无模式写入方式建立的超级表及其对应的子表与通过 SQL 直接建立的超级表和子表完全没有区别，你也可以通过，SQL 语句直接向其中写入数据。需要注意的是，通过无模式写入方式建立的表，其表名是基于标签值按照固定的映射规则生成，所以无法明确地进行表意，缺乏可读性。 无模式写入方式建立的超级表及其对应的子表与通过 SQL 直接建立的超级表和子表完全没有区别，你也可以通过，SQL 语句直接向其中写入数据。需要注意的是，通过无模式写入方式建立的表，其表名是基于标签值按照固定的映射规则生成，所以无法明确地进行表意，缺乏可读性。
## 无模式写入行协议 ## 无模式写入行协议
...@@ -80,9 +79,10 @@ st,t1=3,t2=4,t3=t3 c1=3i64,c3="passit",c2=false,c4=4f64 1626006833639000000 ...@@ -80,9 +79,10 @@ st,t1=3,t2=4,t3=t3 c1=3i64,c3="passit",c2=false,c4=4f64 1626006833639000000
7. 如果指定的数据子表已经存在，而且本次指定的标签列取值跟已保存的值不一样，那么最新的数据行中的值会覆盖旧的标签列取值。 7. 如果指定的数据子表已经存在，而且本次指定的标签列取值跟已保存的值不一样，那么最新的数据行中的值会覆盖旧的标签列取值。
8. 整个处理过程中遇到的错误会中断写入过程，并返回错误代码。 8. 整个处理过程中遇到的错误会中断写入过程，并返回错误代码。
:::Tip :::tip
无模式所有的处理逻辑，仍会遵循 TDengine 对数据结构的底层限制，例如每行数据的总长度不能超过 无模式所有的处理逻辑，仍会遵循 TDengine 对数据结构的底层限制，例如每行数据的总长度不能超过
16k 字节。这方面的具体限制约束请参见 [TAOS SQL 边界限制](https://www.taosdata.com/cn/documentation/taos-sql#limitation) 16k 字节。这方面的具体限制约束请参见 [TAOS SQL 边界限制](https://www.taosdata.com/cn/documentation/taos-sql#limitation)
::: :::
## 时间分辨率识别 ## 时间分辨率识别
...@@ -161,4 +161,4 @@ TDengine 提供数据写入的幂等性保证，即您可以反复调用 API 进 ...@@ -161,4 +161,4 @@ TDengine 提供数据写入的幂等性保证，即您可以反复调用 API 进
如果是无模式写入过程中的数据本身错误，应用会得到 TSDB_CODE_TSC_LINE_SYNTAX_ERROR 如果是无模式写入过程中的数据本身错误，应用会得到 TSDB_CODE_TSC_LINE_SYNTAX_ERROR
错误信息，该错误信息表明错误发生在写入文本中。其他的错误码与原系统一致，可以通过 错误信息，该错误信息表明错误发生在写入文本中。其他的错误码与原系统一致，可以通过
taos_errstr 获取具体的错误原因。 taos_errstr 获取具体的错误原因。
\ No newline at end of file
docs-examples/c/json_protocol_example.c 0 → 100644
浏览文件 @ 90cb6f00
// compile with
// gcc connect_example.c -o connect_example -I /usr/local/taos/include -L /usr/local/taos/driver -ltaos
#include <stdio.h>
#include "taos.h"
#include "taoserror.h"
int main() {
// if don't want to connect to a default db, set it to NULL.
const char *db = "test";
TAOS *taos = taos_connect("localhost", "root", "taosdata", db, 6030);
printf("Connected\n");
char *message[] = {
"[ \
{ \
\"metric\":\"cpu_load_1\", \
\"timestamp\": 1626006833, \
\"value\": 55.5, \
\"tags\": \
{ \
\"host\": \"ubuntu\", \
\"interface\": \"eth1\", \
\"Id\": \"tb1\" \
} \
}, \
{ \
\"metric\":\"cpu_load_2\", \
\"timestamp\": 1626006833, \
\"value\": 55.5, \
\"tags\": \
{ \
\"host\": \"ubuntu\", \
\"interface\": \"eth2\", \
\"Id\": \"tb2\" \
} \
} \
]",
"[ \
{ \
\"metric\":\"cpu_load_1\", \
\"timestamp\": 1626006834, \
\"value\": 56.5, \
\"tags\": \
{ \
\"host\": \"ubuntu\", \
\"interface\": \"eth1\", \
\"Id\": \"tb1\" \
} \
}, \
{ \
\"metric\":\"cpu_load_2\", \
\"timestamp\": 1626006834, \
\"value\": 56.5, \
\"tags\": \
{ \
\"host\": \"ubuntu\", \
\"interface\": \"eth2\", \
\"Id\": \"tb2\" \
} \
} \
]"
};
void* code = taos_schemaless_insert(taos, message, 1, 3, NULL);
if (code) {
printf("payload_1 code: %d, %s.\n", code, tstrerror(code));
}
taos_close(taos);
}
docs-examples/csharp/ConnectExample.cs
浏览文件 @ 90cb6f00
namespace TDExamples
namespace TDengineExample
{ {
internal class ConnectExample using TDengineDriver;
internal class ConnectExample
{ {
static void Main(String[] args) static void Main(String[] args)
{ {
......
docs-examples/java/pom.xml
浏览文件 @ 90cb6f00
...@@ -25,7 +25,7 @@ ...@@ -25,7 +25,7 @@
<dependency> <dependency>
<groupId>junit</groupId> <groupId>junit</groupId>
<artifactId>junit</artifactId> <artifactId>junit</artifactId>
<version>4.11</version> <version>4.13.1</version>
<scope>test</scope> <scope>test</scope>
</dependency> </dependency>
</dependencies> </dependencies>
......
docs-examples/java/src/main/java/com/taos/example/JSONProtocolExample.java 0 → 100644
浏览文件 @ 90cb6f00
package com.taos.example;
import com.taosdata.jdbc.SchemalessWriter;
import com.taosdata.jdbc.enums.SchemalessProtocolType;
import com.taosdata.jdbc.enums.SchemalessTimestampType;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;
public class JSONProtocolExample {
private static Connection getConnection() throws SQLException {
String jdbcUrl = "jdbc:TAOS://localhost:6030?user=root&password=taosdata";
return DriverManager.getConnection(jdbcUrl);
}
private static void createDatabase(Connection conn) throws SQLException {
try (Statement stmt = conn.createStatement()) {
stmt.execute("create database test");
stmt.execute("use test");
}
}
private static String getJSONData() {
return "[{\"metric\": \"meters.current\", \"timestamp\": 1648432611249, \"value\": 10.3, \"tags\": {\"location\": \"Beijing.Chaoyang\", \"groupid\": 2}}," +
" {\"metric\": \"meters.voltage\", \"timestamp\": 1648432611249, \"value\": 219, \"tags\": {\"location\": \"Beijing.Haidian\", \"groupid\": 1}}, " +
"{\"metric\": \"meters.current\", \"timestamp\": 1648432611250, \"value\": 12.6, \"tags\": {\"location\": \"Beijing.Chaoyang\", \"groupid\": 2}}," +
" {\"metric\": \"meters.voltage\", \"timestamp\": 1648432611250, \"value\": 221, \"tags\": {\"location\": \"Beijing.Haidian\", \"groupid\": 1}}]";
}
public static void main(String[] args) throws SQLException {
try (Connection conn = getConnection()) {
createDatabase(conn);
SchemalessWriter writer = new SchemalessWriter(conn);
String jsonData = getJSONData();
writer.write(jsonData, SchemalessProtocolType.JSON, SchemalessTimestampType.NOT_CONFIGURED);
}
}
}
docs-examples/java/src/main/java/com/taos/example/LineProtocolExample.java 0 → 100644
浏览文件 @ 90cb6f00
package com.taos.example;
import com.taosdata.jdbc.SchemalessWriter;
import com.taosdata.jdbc.enums.SchemalessProtocolType;
import com.taosdata.jdbc.enums.SchemalessTimestampType;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;
public class LineProtocolExample {
// format: measurement,tag_set field_set timestamp
private static String[] lines = {
"meters,location=Beijing.Chaoyang,groupid=2 current=10.3,voltage=219,phase=0.31 1648432611249300", // micro seconds
"meters,location=Beijing.Chaoyang,groupid=2 current=12.6,voltage=218,phase=0.33 1648432611249800",
"meters,location=Beijing.Chaoyang,groupid=2 current=12.3,voltage=221,phase=0.31 1648432611250300",
"meters,location=Beijing.Chaoyang,groupid=3 current=10.3,voltage=218,phase=0.25 1648432611249200",
"meters,location=Beijing.Haidian,groupid=2 current=11.8,voltage=221,phase=0.28 1648432611249000",
"meters,location=Beijing.Haidian,groupid=2 current=13.4,voltage=223,phase=0.29 1648432611249500",
"meters,location=Beijing.Haidian,groupid=3 current=10.8,voltage=223,phase=0.29 1648432611249300",
"meters,location=Beijing.Haidian,groupid=3 current=11.3,voltage=221,phase=0.35 1648432611249800",
};
private static Connection getConnection() throws SQLException {
String jdbcUrl = "jdbc:TAOS://localhost:6030?user=root&password=taosdata";
return DriverManager.getConnection(jdbcUrl);
}
private static void createDatabase(Connection conn) throws SQLException {
try (Statement stmt = conn.createStatement()) {
// the default precision is ms (microsecond), but we use us(microsecond) here.
stmt.execute("create database test precision 'us'");
stmt.execute("use test");
}
}
public static void main(String[] args) throws SQLException {
try (Connection conn = getConnection()) {
createDatabase(conn);
SchemalessWriter writer = new SchemalessWriter(conn);
writer.write(lines, SchemalessProtocolType.LINE, SchemalessTimestampType.MICRO_SECONDS);
}
}
}
docs-examples/java/src/main/java/com/taos/example/RestInsertExample.java
浏览文件 @ 90cb6f00
...@@ -31,32 +31,32 @@ public class RestInsertExample { ...@@ -31,32 +31,32 @@ public class RestInsertExample {
/** /**
* The generated SQL is: * The generated SQL is:
* INSERT INTO power.d1001 USING power.meters TAGS(Beijing.Chaoyang, 2) VALUES('2018-10-03 14:38:05.000',10.30000,219,0.31000) * INSERT INTO power.d1001 USING power.meters TAGS(Beijing.Chaoyang, 2) VALUES('2018-10-03 14:38:05.000',10.30000,219,0.31000)
* power.d1001 USING power.meters TAGS(Beijing.Chaoyang, 2) VALUES('2018-10-03 14:38:15.000',12.60000,218,0.33000) * power.d1001 USING power.meters TAGS(Beijing.Chaoyang, 2) VALUES('2018-10-03 14:38:15.000',12.60000,218,0.33000)
* power.d1001 USING power.meters TAGS(Beijing.Chaoyang, 2) VALUES('2018-10-03 14:38:16.800',12.30000,221,0.31000) * power.d1001 USING power.meters TAGS(Beijing.Chaoyang, 2) VALUES('2018-10-03 14:38:16.800',12.30000,221,0.31000)
* power.d1002 USING power.meters TAGS(Beijing.Chaoyang, 3) VALUES('2018-10-03 14:38:16.650',10.30000,218,0.25000) * power.d1002 USING power.meters TAGS(Beijing.Chaoyang, 3) VALUES('2018-10-03 14:38:16.650',10.30000,218,0.25000)
* power.d1003 USING power.meters TAGS(Beijing.Haidian, 2) VALUES('2018-10-03 14:38:05.500',11.80000,221,0.28000) * power.d1003 USING power.meters TAGS(Beijing.Haidian, 2) VALUES('2018-10-03 14:38:05.500',11.80000,221,0.28000)
* power.d1003 USING power.meters TAGS(Beijing.Haidian, 2) VALUES('2018-10-03 14:38:16.600',13.40000,223,0.29000) * power.d1003 USING power.meters TAGS(Beijing.Haidian, 2) VALUES('2018-10-03 14:38:16.600',13.40000,223,0.29000)
* power.d1004 USING power.meters TAGS(Beijing.Haidian, 3) VALUES('2018-10-03 14:38:05.000',10.80000,223,0.29000) * power.d1004 USING power.meters TAGS(Beijing.Haidian, 3) VALUES('2018-10-03 14:38:05.000',10.80000,223,0.29000)
* power.d1004 USING power.meters TAGS(Beijing.Haidian, 3) VALUES('2018-10-03 14:38:06.500',11.50000,221,0.35000) * power.d1004 USING power.meters TAGS(Beijing.Haidian, 3) VALUES('2018-10-03 14:38:06.500',11.50000,221,0.35000)
*/ */
private static String getSQL() { private static String getSQL() {
StringBuilder sb = new StringBuilder("INSERT INTO "); StringBuilder sb = new StringBuilder("INSERT INTO ");
for (String line : getRawData()) { for (String line : getRawData()) {
String[] fields = line.split(","); String[] ps = line.split(",");
sb.append("power." + fields[0]).append(" USING power.meters TAGS(") sb.append("power." + ps[0]).append(" USING power.meters TAGS(")
.append(fields[5]).append(", ") .append(ps[5]).append(", ") // tag: location
.append(fields[6]) .append(ps[6]) // tag: groupId
.append(") VALUES(") .append(") VALUES(")
.append('\'').append(fields[1]).append('\'').append(",") .append('\'').append(ps[1]).append('\'').append(",") // ts
.append(fields[2]).append(",") .append(ps[2]).append(",") // current
.append(fields[3]).append(",") .append(ps[3]).append(",") // voltage
.append(fields[4]).append(") "); .append(ps[4]).append(") "); // phase
} }
return sb.toString(); return sb.toString();
} }
public static void insertData() throws SQLException { public static void insertData() throws SQLException {
try(Connection conn = getConnection()) { try (Connection conn = getConnection()) {
try (Statement stmt = conn.createStatement()) { try (Statement stmt = conn.createStatement()) {
stmt.execute("CREATE DATABASE power KEEP 3650"); stmt.execute("CREATE DATABASE power KEEP 3650");
stmt.execute("CREATE STABLE power.meters (ts TIMESTAMP, current FLOAT, voltage INT, phase FLOAT) " + stmt.execute("CREATE STABLE power.meters (ts TIMESTAMP, current FLOAT, voltage INT, phase FLOAT) " +
......
docs-examples/java/src/main/java/com/taos/example/TelnetLineProtocolExample.java 0 → 100644
浏览文件 @ 90cb6f00
package com.taos.example;
import com.taosdata.jdbc.SchemalessWriter;
import com.taosdata.jdbc.enums.SchemalessProtocolType;
import com.taosdata.jdbc.enums.SchemalessTimestampType;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;
public class TelnetLineProtocolExample {
// format: <metric> <timestamp> <value> <tagk_1>=<tagv_1>[ <tagk_n>=<tagv_n>]
private static String[] lines = {"meters.current 1648432611249 10.3 location=Beijing.Chaoyang groupid=2",
"meters.current 1648432611250 12.6 location=Beijing.Chaoyang groupid=2",
"meters.current 1648432611249 10.8 location=Beijing.Haidian groupid=3",
"meters.current 1648432611250 11.3 location=Beijing.Haidian groupid=3",
"meters.voltage 1648432611249 219 location=Beijing.Chaoyang groupid=2",
"meters.voltage 1648432611250 218 location=Beijing.Chaoyang groupid=2",
"meters.voltage 1648432611249 221 location=Beijing.Haidian groupid=3",
"meters.voltage 1648432611250 217 location=Beijing.Haidian groupid=3",
};
private static Connection getConnection() throws SQLException {
String jdbcUrl = "jdbc:TAOS://localhost:6030?user=root&password=taosdata";
return DriverManager.getConnection(jdbcUrl);
}
private static void createDatabase(Connection conn) throws SQLException {
try (Statement stmt = conn.createStatement()) {
// the default precision is ms (microsecond), but we use us(microsecond) here.
stmt.execute("create database test precision 'us'");
stmt.execute("use test");
}
}
public static void main(String[] args) throws SQLException {
try (Connection conn = getConnection()) {
createDatabase(conn);
SchemalessWriter writer = new SchemalessWriter(conn);
writer.write(lines, SchemalessProtocolType.TELNET, SchemalessTimestampType.NOT_CONFIGURED);
}
}
}
src/connector/python/examples/query-async.py → docs-examples/python/async_query_example.py
浏览文件 @ 90cb6f00
from taos import *
from ctypes import *
import time import time
from ctypes import *
from taos import *
def fetch_callback(p_param, p_result, num_of_rows): def fetch_callback(p_param, p_result, num_of_rows):
print("fetched ", num_of_rows, "rows") print("fetched ", num_of_rows, "rows")
...@@ -10,7 +12,6 @@ def fetch_callback(p_param, p_result, num_of_rows): ...@@ -10,7 +12,6 @@ def fetch_callback(p_param, p_result, num_of_rows):
if num_of_rows == 0: if num_of_rows == 0:
print("fetching completed") print("fetching completed")
p.contents.done = True p.contents.done = True
# should explicitly close the result in fetch completed or cause error
result.close() result.close()
return return
if num_of_rows < 0: if num_of_rows < 0:
...@@ -18,25 +19,20 @@ def fetch_callback(p_param, p_result, num_of_rows): ...@@ -18,25 +19,20 @@ def fetch_callback(p_param, p_result, num_of_rows):
result.check_error(num_of_rows) result.check_error(num_of_rows)
result.close() result.close()
return None return None
for row in result.rows_iter(num_of_rows): for row in result.rows_iter(num_of_rows):
# print(row) print(row)
None
p.contents.count += result.row_count p.contents.count += result.row_count
result.fetch_rows_a(fetch_callback, p_param) result.fetch_rows_a(fetch_callback, p_param)
def query_callback(p_param, p_result, code): def query_callback(p_param, p_result, code):
# type: (c_void_p, c_void_p, c_int) -> None
if p_result is None: if p_result is None:
return return
result = TaosResult(p_result) result = TaosResult(p_result)
if code == 0: if code == 0:
result.fetch_rows_a(fetch_callback, p_param) result.fetch_rows_a(fetch_callback, p_param)
result.check_error(code) result.check_error(code)
# explicitly close result while query failed
result.close()
class Counter(Structure): class Counter(Structure):
...@@ -47,16 +43,30 @@ class Counter(Structure): ...@@ -47,16 +43,30 @@ class Counter(Structure):
def test_query(conn): def test_query(conn):
# type: (TaosConnection) -> None
counter = Counter(count=0) counter = Counter(count=0)
conn.query_a("select * from log.log", query_callback, byref(counter)) conn.query_a("select ts, current, voltage from power.meters", query_callback, byref(counter))
while not counter.done: while not counter.done:
print("wait query callback") print(counter)
time.sleep(1) time.sleep(1)
print(counter) print(counter)
# conn.close() conn.close()
if __name__ == "__main__": if __name__ == "__main__":
test_query(connect()) test_query(connect())
\ No newline at end of file
# possible stdout:
# { count: 0, done: False }
# fetched 8 rows
# 1538548685000 10.300000 219
# 1538548695000 12.600000 218
# 1538548696800 12.300000 221
# 1538548696650 10.300000 218
# 1538548685500 11.800000 221
# 1538548696600 13.400000 223
# 1538548685500 10.800000 223
# 1538548686500 11.500000 221
# fetched 0 rows
# fetching completed
# { count: 8, done: True }
docs-examples/python/bind_param_example.py 0 → 100644
浏览文件 @ 90cb6f00
import taos
from datetime import datetime
# note: lines have already been sorted by table name
lines = [('d1001', '2018-10-03 14:38:05.000', 10.30000, 219, 0.31000, 'Beijing.Chaoyang', 2),
('d1001', '2018-10-03 14:38:15.000', 12.60000, 218, 0.33000, 'Beijing.Chaoyang', 2),
('d1001', '2018-10-03 14:38:16.800', 12.30000, 221, 0.31000, 'Beijing.Chaoyang', 2),
('d1002', '2018-10-03 14:38:16.650', 10.30000, 218, 0.25000, 'Beijing.Chaoyang', 3),
('d1003', '2018-10-03 14:38:05.500', 11.80000, 221, 0.28000, 'Beijing.Haidian', 2),
('d1003', '2018-10-03 14:38:16.600', 13.40000, 223, 0.29000, 'Beijing.Haidian', 2),
('d1004', '2018-10-03 14:38:05.000', 10.80000, 223, 0.29000, 'Beijing.Haidian', 3),
('d1004', '2018-10-03 14:38:06.500', 11.50000, 221, 0.35000, 'Beijing.Haidian', 3)]
def get_ts(ts: str):
dt = datetime.strptime(ts, '%Y-%m-%d %H:%M:%S.%f')
return int(dt.timestamp() * 1000)
def create_stable():
conn = taos.connect()
try:
conn.execute("CREATE DATABASE power")
conn.execute("CREATE STABLE power.meters (ts TIMESTAMP, current FLOAT, voltage INT, phase FLOAT) "
"TAGS (location BINARY(64), groupId INT)")
finally:
conn.close()
def bind_row_by_row(stmt: taos.TaosStmt):
tb_name = None
for row in lines:
if tb_name != row[0]:
tb_name = row[0]
tags: taos.TaosBind = taos.new_bind_params(2) # 2 is count of tags
tags[0].binary(row[5]) # location
tags[1].int(row[6]) # groupId
stmt.set_tbname_tags(tb_name, tags)
values: taos.TaosBind = taos.new_bind_params(4) # 4 is count of columns
values[0].timestamp(get_ts(row[1]))
values[1].float(row[2])
values[2].int(row[3])
values[3].float(row[4])
stmt.bind_param(values)
def insert_data():
conn = taos.connect(database="power")
try:
stmt = conn.statement("INSERT INTO ? USING meters TAGS(?, ?) VALUES(?, ?, ?, ?)")
bind_row_by_row(stmt)
stmt.execute()
stmt.close()
finally:
conn.close()
if __name__ == '__main__':
create_stable()
insert_data()
docs-examples/python/json_protocol_example.py 0 → 100644
浏览文件 @ 90cb6f00
import json
import taos
from taos import SmlProtocol, SmlPrecision
lines = [{"metric": "meters.current", "timestamp": 1648432611249, "value": 10.3, "tags": {"location": "Beijing.Chaoyang", "groupid": 2}},
{"metric": "meters.voltage", "timestamp": 1648432611249, "value": 219, "tags": {"location": "Beijing.Haidian", "groupid": 1}},
{"metric": "meters.current", "timestamp": 1648432611250, "value": 12.6, "tags": {"location": "Beijing.Chaoyang", "groupid": 2}},
{"metric": "meters.voltage", "timestamp": 1648432611250, "value": 221, "tags": {"location": "Beijing.Haidian", "groupid": 1}}]
def get_connection():
return taos.connect()
def create_database(conn):
conn.execute("create database test")
conn.execute("use test")
def insert_lines(conn):
global lines
lines = json.dumps(lines)
# note: the first parameter must be a list with only one element.
affected_rows = conn.schemaless_insert([lines], SmlProtocol.JSON_PROTOCOL, SmlPrecision.NOT_CONFIGURED)
print(affected_rows) # 4
if __name__ == '__main__':
connection = get_connection()
try:
create_database(connection)
insert_lines(connection)
finally:
connection.close()
docs-examples/python/line_protocol_example.py 0 → 100644
浏览文件 @ 90cb6f00
import taos
from taos import SmlProtocol, SmlPrecision
lines = ["meters,location=Beijing.Chaoyang,groupid=2 current=10.3,voltage=219,phase=0.31 1648432611249300",
"meters,location=Beijing.Chaoyang,groupid=2 current=12.6,voltage=218,phase=0.33 1648432611249800",
"meters,location=Beijing.Chaoyang,groupid=2 current=12.3,voltage=221,phase=0.31 1648432611250300",
"meters,location=Beijing.Chaoyang,groupid=3 current=10.3,voltage=218,phase=0.25 1648432611249200",
"meters,location=Beijing.Haidian,groupid=2 current=11.8,voltage=221,phase=0.28 1648432611249000",
"meters,location=Beijing.Haidian,groupid=2 current=13.4,voltage=223,phase=0.29 1648432611249500",
"meters,location=Beijing.Haidian,groupid=3 current=10.8,voltage=223,phase=0.29 1648432611249300",
"meters,location=Beijing.Haidian,groupid=3 current=11.3,voltage=221,phase=0.35 1648432611249800",
]
def get_connection():
# create connection use firstEP in taos.cfg.
return taos.connect()
def create_database(conn):
# the default precision is ms (microsecond), but we use us(microsecond) here.
conn.execute("create database test precision 'us'")
conn.execute("use test")
def insert_lines(conn):
affected_rows = conn.schemaless_insert(lines, SmlProtocol.LINE_PROTOCOL, SmlPrecision.MICRO_SECONDS)
print(affected_rows) # 8
if __name__ == '__main__':
connection = get_connection()
try:
create_database(connection)
insert_lines(connection)
finally:
connection.close()
docs-examples/python/multi_bind_example.py 0 → 100644
浏览文件 @ 90cb6f00
import taos
from datetime import datetime
# ANCHOR: bind_batch
table_tags = {
"d1001": ('Beijing.Chaoyang', 2),
"d1002": ('Beijing.Chaoyang', 3),
"d1003": ('Beijing.Haidian', 2),
"d1004": ('Beijing.Haidian', 3)
}
table_values = {
"d1001": [
['2018-10-03 14:38:05.000', '2018-10-03 14:38:15.000', '2018-10-03 14:38:16.800'],
[10.3, 12.6, 12.3],
[219, 218, 221],
[0.31, 0.33, 0.32]
],
"d1002": [
['2018-10-03 14:38:16.650'], [10.3], [218], [0.25]
],
"d1003": [
['2018-10-03 14:38:05.500', '2018-10-03 14:38:16.600'],
[11.8, 13.4],
[221, 223],
[0.28, 0.29]
],
"d1004": [
['2018-10-03 14:38:05.500', '2018-10-03 14:38:06.500'],
[10.8, 11.5],
[223, 221],
[0.29, 0.35]
]
}
def bind_multi_rows(stmt: taos.TaosStmt):
"""
batch bind example
"""
for tb_name in table_values.keys():
tags = table_tags[tb_name]
tag_params = taos.new_bind_params(2)
tag_params[0].binary(tags[0])
tag_params[1].int(tags[1])
stmt.set_tbname_tags(tb_name, tag_params)
values = table_values[tb_name]
value_params = taos.new_multi_binds(4)
value_params[0].timestamp([get_ts(t) for t in values[0]])
value_params[1].float(values[1])
value_params[2].int(values[2])
value_params[3].float(values[3])
stmt.bind_param_batch(value_params)
def insert_data():
conn = taos.connect(database="power")
try:
stmt = conn.statement("INSERT INTO ? USING meters TAGS(?, ?) VALUES(?, ?, ?, ?)")
bind_multi_rows(stmt)
stmt.execute()
stmt.close()
finally:
conn.close()
# ANCHOR_END: bind_batch
def create_stable():
conn = taos.connect()
try:
conn.execute("CREATE DATABASE power")
conn.execute("CREATE STABLE power.meters (ts TIMESTAMP, current FLOAT, voltage INT, phase FLOAT) "
"TAGS (location BINARY(64), groupId INT)")
finally:
conn.close()
def get_ts(ts: str):
dt = datetime.strptime(ts, '%Y-%m-%d %H:%M:%S.%f')
return int(dt.timestamp() * 1000)
if __name__ == '__main__':
create_stable()
insert_data()
docs-examples/python/native_insert_example.py 0 → 100644
浏览文件 @ 90cb6f00
import taos
lines = ["d1001,2018-10-03 14:38:05.000,10.30000,219,0.31000,Beijing.Chaoyang,2",
"d1004,2018-10-03 14:38:05.000,10.80000,223,0.29000,Beijing.Haidian,3",
"d1003,2018-10-03 14:38:05.500,11.80000,221,0.28000,Beijing.Haidian,2",
"d1004,2018-10-03 14:38:06.500,11.50000,221,0.35000,Beijing.Haidian,3",
"d1002,2018-10-03 14:38:16.650,10.30000,218,0.25000,Beijing.Chaoyang,3",
"d1001,2018-10-03 14:38:15.000,12.60000,218,0.33000,Beijing.Chaoyang,2",
"d1001,2018-10-03 14:38:16.800,12.30000,221,0.31000,Beijing.Chaoyang,2",
"d1003,2018-10-03 14:38:16.600,13.40000,223,0.29000,Beijing.Haidian,2"]
def get_connection() -> taos.TaosConnection:
"""
create connection use firstEp in taos.cfg and use default user and password.
"""
return taos.connect()
def create_stable(conn: taos.TaosConnection):
conn.execute("CREATE DATABASE power")
conn.execute("USE power")
conn.execute("CREATE STABLE meters (ts TIMESTAMP, current FLOAT, voltage INT, phase FLOAT) "
"TAGS (location BINARY(64), groupId INT)")
# The generated SQL is:
# INSERT INTO d1001 USING meters TAGS(Beijing.Chaoyang, 2) VALUES ('2018-10-03 14:38:05.000', 10.30000, 219, 0.31000) ('2018-10-03 14:38:15.000', 12.60000, 218, 0.33000) ('2018-10-03 14:38:16.800', 12.30000, 221, 0.31000)
# d1002 USING meters TAGS(Beijing.Chaoyang, 3) VALUES ('2018-10-03 14:38:16.650', 10.30000, 218, 0.25000)
# d1003 USING meters TAGS(Beijing.Haidian, 2) VALUES ('2018-10-03 14:38:05.500', 11.80000, 221, 0.28000) ('2018-10-03 14:38:16.600', 13.40000, 223, 0.29000)
# d1004 USING meters TAGS(Beijing.Haidian, 3) VALUES ('2018-10-03 14:38:05.000', 10.80000, 223, 0.29000) ('2018-10-03 14:38:06.500', 11.50000, 221, 0.35000)
def get_sql():
global lines
lines = map(lambda line: line.split(','), lines) # [['d1001', ...]...]
lines = sorted(lines, key=lambda ls: ls[0]) # sort by table name
sql = "INSERT INTO "
tb_name = None
for ps in lines:
tmp_tb_name = ps[0]
if tb_name != tmp_tb_name:
tb_name = tmp_tb_name
sql += f"{tb_name} USING meters TAGS({ps[5]}, {ps[6]}) VALUES "
sql += f"('{ps[1]}', {ps[2]}, {ps[3]}, {ps[4]}) "
return sql
def insert_data(conn: taos.TaosConnection):
sql = get_sql()
affected_rows = conn.execute(sql)
print("affected_rows", affected_rows) # 8
if __name__ == '__main__':
connection = get_connection()
try:
create_stable(connection)
insert_data(connection)
finally:
connection.close()
docs-examples/python/query_example.py 0 → 100644
浏览文件 @ 90cb6f00
import taos
# ANCHOR: iter
def query_api_demo(conn: taos.TaosConnection):
result: taos.TaosResult = conn.query("SELECT tbname, * FROM meters LIMIT 2")
print("field count:", result.field_count)
print("meta of fields[1]:", result.fields[1])
print("======================Iterate on result=========================")
for row in result:
print(row)
# field count: 7
# meta of files[1]: {name: ts, type: 9, bytes: 8}
# ======================Iterate on result=========================
# ('d1001', datetime.datetime(2018, 10, 3, 14, 38, 5), 10.300000190734863, 219, 0.3100000023841858, 'Beijing.Chaoyang', 2)
# ('d1001', datetime.datetime(2018, 10, 3, 14, 38, 15), 12.600000381469727, 218, 0.33000001311302185, 'Beijing.Chaoyang', 2)
# ANCHOR_END: iter
# ANCHOR: fetch_all
def fetch_all_demo(conn: taos.TaosConnection):
result: taos.TaosResult = conn.query("SELECT ts, current FROM meters LIMIT 2")
rows = result.fetch_all_into_dict()
print("row count:", result.row_count)
print("===============all data===================")
print(rows)
# row count: 2
# ===============all data===================
# [{'ts': datetime.datetime(2018, 10, 3, 14, 38, 5), 'current': 10.300000190734863},
# {'ts': datetime.datetime(2018, 10, 3, 14, 38, 15), 'current': 12.600000381469727}]
# ANCHOR_END: fetch_all
if __name__ == '__main__':
connection = taos.connect(database="power")
try:
query_api_demo(connection)
fetch_all_demo(connection)
finally:
connection.close()
docs-examples/python/telnet_line_protocol_example.py 0 → 100644
浏览文件 @ 90cb6f00
import taos
from taos import SmlProtocol, SmlPrecision
# format: <metric> <timestamp> <value> <tagk_1>=<tagv_1>[ <tagk_n>=<tagv_n>]
lines = ["meters.current 1648432611249 10.3 location=Beijing.Chaoyang groupid=2",
"meters.current 1648432611250 12.6 location=Beijing.Chaoyang groupid=2",
"meters.current 1648432611249 10.8 location=Beijing.Haidian groupid=3",
"meters.current 1648432611250 11.3 location=Beijing.Haidian groupid=3",
"meters.voltage 1648432611249 219 location=Beijing.Chaoyang groupid=2",
"meters.voltage 1648432611250 218 location=Beijing.Chaoyang groupid=2",
"meters.voltage 1648432611249 221 location=Beijing.Haidian groupid=3",
"meters.voltage 1648432611250 217 location=Beijing.Haidian groupid=3",
]
# create connection use firstEp in taos.cfg.
def get_connection():
return taos.connect()
def create_database(conn):
conn.execute("create database test")
conn.execute("use test")
def insert_lines(conn):
affected_rows = conn.schemaless_insert(lines, SmlProtocol.TELNET_PROTOCOL, SmlPrecision.NOT_CONFIGURED)
print(affected_rows) # 8
if __name__ == '__main__':
connection = get_connection()
try:
create_database(connection)
insert_lines(connection)
finally:
connection.close()
examples/c/makefile
浏览文件 @ 90cb6f00
...@@ -17,7 +17,6 @@ exe: ...@@ -17,7 +17,6 @@ exe:
gcc $(CFLAGS) ./asyncdemo.c -o $(ROOT)asyncdemo $(LFLAGS) gcc $(CFLAGS) ./asyncdemo.c -o $(ROOT)asyncdemo $(LFLAGS)
gcc $(CFLAGS) ./demo.c -o $(ROOT)demo $(LFLAGS) gcc $(CFLAGS) ./demo.c -o $(ROOT)demo $(LFLAGS)
gcc $(CFLAGS) ./prepare.c -o $(ROOT)prepare $(LFLAGS) gcc $(CFLAGS) ./prepare.c -o $(ROOT)prepare $(LFLAGS)
gcc $(CFLAGS) ./stream.c -o $(ROOT)stream $(LFLAGS)
gcc $(CFLAGS) ./subscribe.c -o $(ROOT)subscribe $(LFLAGS) gcc $(CFLAGS) ./subscribe.c -o $(ROOT)subscribe $(LFLAGS)
gcc $(CFLAGS) ./apitest.c -o $(ROOT)apitest $(LFLAGS) gcc $(CFLAGS) ./apitest.c -o $(ROOT)apitest $(LFLAGS)
...@@ -25,6 +24,5 @@ clean: ...@@ -25,6 +24,5 @@ clean:
rm $(ROOT)asyncdemo rm $(ROOT)asyncdemo
rm $(ROOT)demo rm $(ROOT)demo
rm $(ROOT)prepare rm $(ROOT)prepare
rm $(ROOT)stream
rm $(ROOT)subscribe rm $(ROOT)subscribe
rm $(ROOT)apitest rm $(ROOT)apitest
src/connector/C#/examples/Main.cs
浏览文件 @ 90cb6f00
...@@ -20,9 +20,6 @@ namespace AsyncQueryExample ...@@ -20,9 +20,6 @@ namespace AsyncQueryExample
subscribeSample.RunSubscribeWithCallback(conn, "subscribe_with_callback"); subscribeSample.RunSubscribeWithCallback(conn, "subscribe_with_callback");
subscribeSample.RunSubscribeWithoutCallback(conn, "subscribe_without_callback"); subscribeSample.RunSubscribeWithoutCallback(conn, "subscribe_without_callback");
StreamSample streamSample = new StreamSample();
streamSample.RunStreamOption1(conn, "stream_sample_option1");
UtilsTools.CloseConnection(conn); UtilsTools.CloseConnection(conn);
} }
} }
......
src/connector/C#/examples/StreamSample.cs 已删除 100644 → 0
浏览文件 @ 57e0ac28
using System;
using TDengineDriver;
using Sample.UtilsTools;
using System.Runtime.InteropServices;
using System.Threading;
using System.Collections.Generic;
using System.Text;
namespace Example
{
public class StreamSample
{
public void RunStreamOption1(IntPtr conn, string table)
{
PrepareData(conn, table);
StreamOpenCallback streamOpenCallback = new StreamOpenCallback(StreamCallback);
IntPtr stream = TDengine.OpenStream(conn, $"select count(*) from {table} interval(1m) sliding(30s)", streamOpenCallback, 0, IntPtr.Zero, null);
if (stream == IntPtr.Zero)
{
throw new Exception("OPenStream failed");
}
else
{
Thread.Sleep(100000);
AddNewData(conn, table, 5,true);
Thread.Sleep(100000);
TDengine.CloseStream(stream);
Console.WriteLine("stream done");
}
}
public void StreamCallback(IntPtr param, IntPtr taosRes, IntPtr taosRow)
{
if (taosRes == IntPtr.Zero || taosRow == IntPtr.Zero)
{
return;
}
else
{
var rowData = new List<Object>();
rowData = UtilsTools.FetchRow(taosRow, taosRes);
int count = 0;
rowData.ForEach((item) =>
{
Console.Write("{0} \t|\t", item.ToString());
count++;
if (count % rowData.Count == 0)
{
Console.WriteLine("");
}
});
}
}
public void PrepareData(IntPtr conn, string tableName)
{
string createTable = $"create table if not exists {tableName} (ts timestamp,i8 tinyint,i16 smallint,i32 int,i64 bigint);";
UtilsTools.ExecuteUpdate(conn, createTable);
AddNewData(conn, tableName, 5);
}
public void AddNewData(IntPtr conn, string tableName, int numRows,bool interval = false)
{
long ts = 1646150410100;
Random rs = new Random();
StringBuilder insert = new StringBuilder();
Random rd = new Random();
for (int i = 0; i < numRows; i++)
{
insert.Append("insert into ");
insert.Append(tableName);
insert.Append(" values ");
insert.Append('(');
insert.Append(ts);
insert.Append(',');
insert.Append(rs.Next(sbyte.MinValue+1, sbyte.MaxValue));
insert.Append(',');
insert.Append(rs.Next(short.MinValue+1, short.MaxValue));
insert.Append(',');
insert.Append(rs.Next(int.MinValue+1, int.MaxValue));
insert.Append(',');
insert.Append(rs.Next(int.MinValue+1, int.MaxValue));
insert.Append(')');
UtilsTools.ExecuteUpdate(conn, insert.ToString());
insert.Clear();
ts += rd.Next(10000, 100000);
if( interval)
{
Thread.Sleep(rs.Next(100,300) * i);
}
else
{
continue;
}
}
}
}
}
\ No newline at end of file
src/connector/C#/src/TDengineDriver/TDengineDriver.cs
浏览文件 @ 90cb6f00
...@@ -179,8 +179,6 @@ namespace TDengineDriver ...@@ -179,8 +179,6 @@ namespace TDengineDriver
/// <param name="param"> Additional parameters supplied by the client when taos_subscribe is called.</param> /// <param name="param"> Additional parameters supplied by the client when taos_subscribe is called.</param>
/// <param name="code"> Error code.</param> /// <param name="code"> Error code.</param>
public delegate void SubscribeCallback(IntPtr subscribe, IntPtr tasRes, IntPtr param, int code); public delegate void SubscribeCallback(IntPtr subscribe, IntPtr tasRes, IntPtr param, int code);
public delegate void StreamOpenCallback(IntPtr param, IntPtr taosRes, IntPtr taosRow);
public delegate void StreamOpenCallback2(IntPtr ptr);
public class TDengine public class TDengine
{ {
...@@ -561,33 +559,5 @@ namespace TDengineDriver ...@@ -561,33 +559,5 @@ namespace TDengineDriver
} }
} }
// Stream
/// <summary>
/// Used to open an stream, which can do continuous query.
/// </summary>
/// <param name="taos"> taos connection return by <see cref = "Connect"></param>
/// <param name="sql"> Query statement( query only)</param>
/// <param name="fp"> User defined callback.</param>
/// <param name="stime"> The time when stream computing starts. If it is 0, it means starting from now.
/// If it is not zero, it means starting from the specified time (the number of
/// milliseconds from 1970/1/1 UTC time).
/// </param>
/// <param name="param">First parameter provide by application for callback usage.
/// While callback,this parameter is provided to the application.</param>
/// <param name="callback2">The second callback function which will be called when the continuous query
/// stop automatically.</param>
/// <returns> Return null indicate creation failed, not null for success.</returns>
[DllImport("taos", EntryPoint = "taos_open_stream", CallingConvention = CallingConvention.Cdecl)]
static extern public IntPtr OpenStream(IntPtr taos, string sql, StreamOpenCallback fp, Int64 stime, IntPtr param, StreamOpenCallback2 callback2);
/// <summary>
/// Used too stop data flow.
/// Remember to stop data flow when you stopped steam computing.
/// </summary>
/// <param name="stream"> Value returned by <see cref = "OpenStream"></param>
[DllImport("taos", EntryPoint = "taos_close_stream", CallingConvention = CallingConvention.Cdecl)]
static extern public void CloseStream(IntPtr stream);
} }
} }
src/connector/node-red-contrib-tdengine/package-lock.json
浏览文件 @ 90cb6f00
...@@ -1656,9 +1656,9 @@ ...@@ -1656,9 +1656,9 @@
} }
}, },
"minimist": { "minimist": {
"version": "1.2.5", "version": "1.2.6",
"resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.5.tgz", "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.6.tgz",
"integrity": "sha512-FM9nNUYrRBAELZQT3xeZQ7fmMOBg6nWNmJKTcgsJeaLstP/UODVpGsr5OhXhhXg6f+qtJ8uiZ+PUxkDWcgIXLw==", "integrity": "sha512-Jsjnk4bw3YJqYzbdyBiNsPWHPfO++UGG749Cxs6peCu5Xg4nrena6OVxOYxrQTqww0Jmwt+Ref8rggumkTLz9Q==",
"dev": true "dev": true
}, },
"minipass": { "minipass": {
......
src/connector/nodejs/nodetaos/cinterface.js
浏览文件 @ 90cb6f00
...@@ -328,13 +328,6 @@ function CTaosInterface(config = null, pass = false) { ...@@ -328,13 +328,6 @@ function CTaosInterface(config = null, pass = false) {
//void taos_unsubscribe(TAOS_SUB *tsub); //void taos_unsubscribe(TAOS_SUB *tsub);
'taos_unsubscribe': [ref.types.void, [ref.types.void_ptr]], 'taos_unsubscribe': [ref.types.void, [ref.types.void_ptr]],
// Continuous Query
//TAOS_STREAM *taos_open_stream(TAOS *taos, char *sqlstr, void (*fp)(void *param, TAOS_RES *, TAOS_ROW row),
// int64_t stime, void *param, void (*callback)(void *));
'taos_open_stream': [ref.types.void_ptr, [ref.types.void_ptr, ref.types.char_ptr, ref.types.void_ptr, ref.types.int64, ref.types.void_ptr, ref.types.void_ptr]],
//void taos_close_stream(TAOS_STREAM *tstr);
'taos_close_stream': [ref.types.void, [ref.types.void_ptr]],
//Schemaless insert //Schemaless insert
//TAOS_RES* taos_schemaless_insert(TAOS* taos, char* lines[], int numLines, int protocol，int precision) //TAOS_RES* taos_schemaless_insert(TAOS* taos, char* lines[], int numLines, int protocol，int precision)
// 'taos_schemaless_insert': [ref.types.void_ptr, [ref.types.void_ptr, ref.types.char_ptr, ref.types.int, ref.types.int, ref.types.int]] // 'taos_schemaless_insert': [ref.types.void_ptr, [ref.types.void_ptr, ref.types.char_ptr, ref.types.int, ref.types.int, ref.types.int]]
...@@ -717,51 +710,6 @@ CTaosInterface.prototype.unsubscribe = function unsubscribe(subscription) { ...@@ -717,51 +710,6 @@ CTaosInterface.prototype.unsubscribe = function unsubscribe(subscription) {
this.libtaos.taos_unsubscribe(subscription); this.libtaos.taos_unsubscribe(subscription);
} }
// Continuous Query
CTaosInterface.prototype.openStream = function openStream(connection, sql, callback, stime, stoppingCallback, param = ref.ref(ref.NULL)) {
try {
sql = ref.allocCString(sql);
}
catch (err) {
throw "Attribute Error: sql string is expected as a str";
}
var cti = this;
let asyncCallbackWrapper = function (param2, result2, row) {
let fields = cti.fetchFields_a(result2);
let precision = cti.libtaos.taos_result_precision(result2);
let blocks = new Array(fields.length);
blocks.fill(null);
let numOfRows2 = 1;
let offset = 0;
if (numOfRows2 > 0) {
for (let i = 0; i < fields.length; i++) {
if (!convertFunctions[fields[i]['type']]) {
throw new errors.DatabaseError("Invalid data type returned from database");
}
blocks[i] = convertFunctions[fields[i]['type']](row, numOfRows2, fields[i]['bytes'], offset, precision);
offset += fields[i]['bytes'] * numOfRows2;
}
}
callback(param2, result2, blocks, fields);
}
asyncCallbackWrapper = ffi.Callback(ref.types.void, [ref.types.void_ptr, ref.types.void_ptr, ref.refType(ref.types.void_ptr2)], asyncCallbackWrapper);
asyncStoppingCallbackWrapper = ffi.Callback(ref.types.void, [ref.types.void_ptr], stoppingCallback);
let streamHandle = this.libtaos.taos_open_stream(connection, sql, asyncCallbackWrapper, stime, param, asyncStoppingCallbackWrapper);
if (ref.isNull(streamHandle)) {
throw new errors.TDError('Failed to open a stream with TDengine');
return false;
}
else {
console.log("Succesfully opened stream");
return streamHandle;
}
}
CTaosInterface.prototype.closeStream = function closeStream(stream) {
this.libtaos.taos_close_stream(stream);
console.log("Closed stream");
}
//Schemaless insert API //Schemaless insert API
/** /**
* TAOS* taos, char* lines[], int numLines, int protocol，int precision) * TAOS* taos, char* lines[], int numLines, int protocol，int precision)
......
src/connector/nodejs/nodetaos/cursor.js
浏览文件 @ 90cb6f00
...@@ -438,43 +438,7 @@ TDengineCursor.prototype.consumeData = async function consumeData(subscription, ...@@ -438,43 +438,7 @@ TDengineCursor.prototype.consumeData = async function consumeData(subscription,
TDengineCursor.prototype.unsubscribe = function unsubscribe(subscription) { TDengineCursor.prototype.unsubscribe = function unsubscribe(subscription) {
this._chandle.unsubscribe(subscription); this._chandle.unsubscribe(subscription);
} }
/**
* Open a stream with TDengine to run the sql query periodically in the background
* @param {string} sql - The query to run
* @param {function} callback - The callback function to run after each query, accepting inputs as param, result handle, data, fields meta data
* @param {number} stime - The time of the stream starts in the form of epoch milliseconds. If 0 is given, the start time is set as the current time.
* @param {function} stoppingCallback - The callback function to run when the continuous query stops. It takes no inputs
* @param {object} param - A parameter that is passed to the main callback function
* @return {Buffer} A buffer pointing to the stream handle
* @since 1.3.0
*/
TDengineCursor.prototype.openStream = function openStream(sql, callback, stime = 0, stoppingCallback, param = {}) {
let buf = ref.alloc('Object');
ref.writeObject(buf, 0, param);
let asyncCallbackWrapper = function (param2, result2, blocks, fields) {
let data = [];
let num_of_rows = blocks[0].length;
for (let j = 0; j < num_of_rows; j++) {
data.push([]);
let rowBlock = new Array(fields.length);
for (let k = 0; k < fields.length; k++) {
rowBlock[k] = blocks[k][j];
}
data[data.length - 1] = rowBlock;
}
callback(param2, result2, blocks, fields);
}
return this._chandle.openStream(this._connection._conn, sql, asyncCallbackWrapper, stime, stoppingCallback, buf);
}
/**
* Close a stream
* @param {Buffer} - A buffer pointing to the handle of the stream to be closed
* @since 1.3.0
*/
TDengineCursor.prototype.closeStream = function closeStream(stream) {
this._chandle.closeStream(stream);
}
/** /**
* schemaless insert * schemaless insert
* @param {*} connection a valid database connection * @param {*} connection a valid database connection
......
src/connector/python/LICENSE 已删除 100644 → 0
浏览文件 @ 57e0ac28
Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
This program is free software: you can use, redistribute, and/or modify
it under the terms of the GNU Affero General Public License, version 3
or later ("AGPL"), as published by the Free Software Foundation.
This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
src/connector/python/README.md
浏览文件 @ 90cb6f00
...@@ -17,12 +17,6 @@ Or with git url: ...@@ -17,12 +17,6 @@ Or with git url:
pip install git+https://github.com/taosdata/taos-connector-python.git pip install git+https://github.com/taosdata/taos-connector-python.git
``` ```
If you have installed TDengine server or client with prebuilt packages, then you can install the connector from path:
```bash
pip install /usr/local/taos/connector/python
```
## Source Code ## Source Code
[TDengine](https://github.com/taosdata/TDengine) connector for Python source code is hosted on [GitHub](https://github.com/taosdata/taos-connector-python). [TDengine](https://github.com/taosdata/TDengine) connector for Python source code is hosted on [GitHub](https://github.com/taosdata/taos-connector-python).
...@@ -361,71 +355,6 @@ if __name__ == "__main__": ...@@ -361,71 +355,6 @@ if __name__ == "__main__":
test_subscribe_callback(connect()) test_subscribe_callback(connect())
``` ```
### Stream
```python
from taos import *
from ctypes import *
import time
def stream_callback(p_param, p_result, p_row):
# type: (c_void_p, c_void_p, c_void_p) -> None
if p_result is None or p_row is None:
return
result = TaosResult(p_result)
row = TaosRow(result, p_row)
try:
ts, count = row()
p = cast(p_param, POINTER(Counter))
p.contents.count += count
print("[%s] inserted %d in 5s, total count: %d" % (ts.strftime("%Y-%m-%d %H:%M:%S"), count, p.contents.count))
except Exception as err:
print(err)
raise err
class Counter(Structure):
_fields_ = [
("count", c_int),
]
def __str__(self):
return "%d" % self.count
def test_stream(conn):
# type: (TaosConnection) -> None
dbname = "pytest_taos_stream"
try:
conn.execute("drop database if exists %s" % dbname)
conn.execute("create database if not exists %s" % dbname)
conn.select_db(dbname)
conn.execute("create table if not exists log(ts timestamp, n int)")
result = conn.query("select count(*) from log interval(5s)")
assert result.field_count == 2
counter = Counter()
counter.count = 0
stream = conn.stream("select count(*) from log interval(5s)", stream_callback, param=byref(counter))
for _ in range(0, 20):
conn.execute("insert into log values(now,0)(now+1s, 1)(now + 2s, 2)")
time.sleep(2)
stream.close()
conn.execute("drop database if exists %s" % dbname)
conn.close()
except Exception as err:
conn.execute("drop database if exists %s" % dbname)
conn.close()
raise err
if __name__ == "__main__":
test_stream(connect())
```
### Insert with line protocol ### Insert with line protocol
```python ```python
......
src/connector/python/examples/bind-multi.py 已删除 100644 → 0
浏览文件 @ 57e0ac28
# encoding:UTF-8
from taos import *
conn = connect()
dbname = "pytest_taos_stmt_multi"
conn.execute("drop database if exists %s" % dbname)
conn.execute("create database if not exists %s" % dbname)
conn.select_db(dbname)
conn.execute(
"create table if not exists log(ts timestamp, bo bool, nil tinyint, \
ti tinyint, si smallint, ii int, bi bigint, tu tinyint unsigned, \
su smallint unsigned, iu int unsigned, bu bigint unsigned, \
ff float, dd double, bb binary(100), nn nchar(100), tt timestamp)",
)
stmt = conn.statement("insert into log values(?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?)")
params = new_multi_binds(16)
params[0].timestamp((1626861392589, 1626861392590, 1626861392591))
params[1].bool((True, None, False))
params[2].tinyint([-128, -128, None]) # -128 is tinyint null
params[3].tinyint([0, 127, None])
params[4].smallint([3, None, 2])
params[5].int([3, 4, None])
params[6].bigint([3, 4, None])
params[7].tinyint_unsigned([3, 4, None])
params[8].smallint_unsigned([3, 4, None])
params[9].int_unsigned([3, 4, None])
params[10].bigint_unsigned([3, 4, None])
params[11].float([3, None, 1])
params[12].double([3, None, 1.2])
params[13].binary(["abc", "dddafadfadfadfadfa", None])
params[14].nchar(["涛思数据", None, "a long string with 中文字符"])
params[15].timestamp([None, None, 1626861392591])
stmt.bind_param_batch(params)
stmt.execute()
result = stmt.use_result()
assert result.affected_rows == 3
result.close()
result = conn.query("select * from log")
for row in result:
print(row)
result.close()
stmt.close()
conn.close()
\ No newline at end of file
src/connector/python/examples/bind-row.py 已删除 100644 → 0
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from taos import *
conn = connect()
dbname = "pytest_taos_stmt"
conn.execute("drop database if exists %s" % dbname)
conn.execute("create database if not exists %s" % dbname)
conn.select_db(dbname)
conn.execute(
"create table if not exists log(ts timestamp, bo bool, nil tinyint, \
ti tinyint, si smallint, ii int, bi bigint, tu tinyint unsigned, \
su smallint unsigned, iu int unsigned, bu bigint unsigned, \
ff float, dd double, bb binary(100), nn nchar(100), tt timestamp)",
)
stmt = conn.statement("insert into log values(?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?)")
params = new_bind_params(16)
params[0].timestamp(1626861392589)
params[1].bool(True)
params[2].null()
params[3].tinyint(2)
params[4].smallint(3)
params[5].int(4)
params[6].bigint(5)
params[7].tinyint_unsigned(6)
params[8].smallint_unsigned(7)
params[9].int_unsigned(8)
params[10].bigint_unsigned(9)
params[11].float(10.1)
params[12].double(10.11)
params[13].binary("hello")
params[14].nchar("stmt")
params[15].timestamp(1626861392589)
stmt.bind_param(params)
params[0].timestamp(1626861392590)
params[15].null()
stmt.bind_param(params)
stmt.execute()
result = stmt.use_result()
assert result.affected_rows == 2
# No need to explicitly close, but ok for you
# result.close()
result = conn.query("select * from log")
for row in result:
print(row)
# No need to explicitly close, but ok for you
# result.close()
# stmt.close()
# conn.close()
src/connector/python/examples/demo.py 已删除 100644 → 0
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import taos
conn = taos.connect(host='127.0.0.1',
user='root',
password='taosdata',
database='log')
cursor = conn.cursor()
sql = "select * from log.log limit 10"
cursor.execute(sql)
for row in cursor:
print(row)
src/connector/python/examples/insert-lines.py 已删除 100644 → 0
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import taos
from taos import SmlProtocol, SmlPrecision
conn = taos.connect()
dbname = "pytest_line"
conn.execute("drop database if exists %s" % dbname)
conn.execute("create database if not exists %s precision 'us'" % dbname)
conn.select_db(dbname)
lines = [
'st,t1=3i64,t2=4f64,t3="t3" c1=3i64,c3=L"pass",c2=false,c4=4f64 1626006833639000000',
]
conn.schemaless_insert(lines, taos.SmlProtocol.LINE_PROTOCOL, taos.SmlPrecision.NOT_CONFIGURED)
print("inserted")
conn.schemaless_insert(lines, taos.SmlProtocol.LINE_PROTOCOL, taos.SmlPrecision.NOT_CONFIGURED)
result = conn.query("show tables")
for row in result:
print(row)
conn.execute("drop database if exists %s" % dbname)
src/connector/python/examples/pep-249.py 已删除 100644 → 0
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import taos
conn = taos.connect()
cursor = conn.cursor()
cursor.execute("show databases")
results = cursor.fetchall()
for row in results:
print(row)
src/connector/python/examples/query-objectively.py 已删除 100644 → 0
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import taos
conn = taos.connect()
conn.execute("create database if not exists pytest")
result = conn.query("show databases")
num_of_fields = result.field_count
for field in result.fields:
print(field)
for row in result:
print(row)
conn.execute("drop database pytest")
src/connector/python/examples/stream.py 已删除 100644 → 0
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from taos import *
from ctypes import *
import time
def stream_callback(p_param, p_result, p_row):
# type: (c_void_p, c_void_p, c_void_p) -> None
if p_result is None or p_row is None:
return
result = TaosResult(p_result)
row = TaosRow(result, p_row)
try:
ts, count = row()
p = cast(p_param, POINTER(Counter))
p.contents.count += count
print("[%s] inserted %d in 5s, total count: %d" % (ts.strftime("%Y-%m-%d %H:%M:%S"), count, p.contents.count))
except Exception as err:
print(err)
raise err
class Counter(Structure):
_fields_ = [
("count", c_int),
]
def __str__(self):
return "%d" % self.count
def test_stream(conn):
# type: (TaosConnection) -> None
dbname = "pytest_taos_stream"
try:
conn.execute("drop database if exists %s" % dbname)
conn.execute("create database if not exists %s" % dbname)
conn.select_db(dbname)
conn.execute("create table if not exists log(ts timestamp, n int)")
result = conn.query("select count(*) from log interval(5s)")
assert result.field_count == 2
counter = Counter()
counter.count = 0
stream = conn.stream("select count(*) from log interval(5s)", stream_callback, param=byref(counter))
for _ in range(0, 20):
conn.execute("insert into log values(now,0)(now+1s, 1)(now + 2s, 2)")
time.sleep(2)
stream.close()
conn.execute("drop database if exists %s" % dbname)
conn.close()
except Exception as err:
conn.execute("drop database if exists %s" % dbname)
conn.close()
raise err
if __name__ == "__main__":
test_stream(connect())
src/connector/python/examples/subscribe-async.py 已删除 100644 → 0
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from taos import *
from ctypes import *
import time
def subscribe_callback(p_sub, p_result, p_param, errno):
# type: (c_void_p, c_void_p, c_void_p, c_int) -> None
print("# fetch in callback")
result = TaosResult(c_void_p(p_result))
result.check_error(errno)
for row in result.rows_iter():
ts, n = row()
print(ts, n)
def test_subscribe_callback(conn):
# type: (TaosConnection) -> None
dbname = "pytest_taos_subscribe_callback"
try:
print("drop if exists")
conn.execute("drop database if exists %s" % dbname)
print("create database")
conn.execute("create database if not exists %s" % dbname)
print("create table")
# conn.execute("use %s" % dbname)
conn.execute("create table if not exists %s.log(ts timestamp, n int)" % dbname)
print("# subscribe with callback")
sub = conn.subscribe(False, "test", "select * from %s.log" % dbname, 1000, subscribe_callback)
for i in range(10):
conn.execute("insert into %s.log values(now, %d)" % (dbname, i))
time.sleep(0.7)
sub.close()
conn.execute("drop database if exists %s" % dbname)
# conn.close()
except Exception as err:
conn.execute("drop database if exists %s" % dbname)
# conn.close()
raise err
if __name__ == "__main__":
test_subscribe_callback(connect())
src/connector/python/examples/subscribe-sync.py 已删除 100644 → 0
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import taos
import random
conn = taos.connect()
dbname = "pytest_taos_subscribe"
conn.execute("drop database if exists %s" % dbname)
conn.execute("create database if not exists %s" % dbname)
conn.select_db(dbname)
conn.execute("create table if not exists log(ts timestamp, n int)")
for i in range(10):
conn.execute("insert into log values(now, %d)" % i)
sub = conn.subscribe(False, "test", "select * from log", 1000)
print("# consume from begin")
for ts, n in sub.consume():
print(ts, n)
print("# consume new data")
for i in range(5):
conn.execute("insert into log values(now, %d)(now+1s, %d)" % (i, i))
result = sub.consume()
for ts, n in result:
print(ts, n)
sub.close(True)
print("# keep progress consume")
sub = conn.subscribe(False, "test", "select * from log", 1000)
result = sub.consume()
rows = result.fetch_all()
# consume from latest subscription needs root privilege(for /var/lib/taos).
assert result.row_count == 0
print("## consumed ", len(rows), "rows")
print("# consume with a stop condition")
for i in range(10):
conn.execute("insert into log values(now, %d)" % random.randint(0, 10))
result = sub.consume()
try:
ts, n = next(result)
print(ts, n)
if n > 5:
result.stop_query()
print("## stopped")
break
except StopIteration:
continue
sub.close()
# sub.close()
conn.execute("drop database if exists %s" % dbname)
# conn.close()
src/connector/python/pyproject.toml 已删除 100644 → 0
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[tool.poetry]
name = "taospy"
version = "2.1.2"
description = "TDengine connector for python"
authors = ["Taosdata Inc. <support@taosdata.com>"]
license = "AGPL-3.0"
readme = "README.md"
packages = [
{include = "taos"}
]
[tool.poetry.dependencies]
python = "^2.7 || ^3.4"
typing = "*"
[tool.poetry.dev-dependencies]
pytest = [
{ version = "^4.6", python = ">=2.7,<3.0" },
{ version = "^6.2", python = ">=3.7,<4.0" }
]
pdoc = { version = "^7.1.1", python = "^3.7" }
mypy = { version = "^0.910", python = "^3.6" }
black = [{ version = "^21.*", python = ">=3.6.2,<4.0" }]
[build-system]
requires = ["poetry-core>=1.0.0"]
build-backend = "poetry.core.masonry.api"
[tool.black]
line-length = 119
src/connector/python/setup.py 已删除 100644 → 0
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import setuptools
with open("README.md", "r") as fh:
long_description = fh.read()
setuptools.setup(
name="taos",
version="2.1.1",
author="Taosdata Inc.",
author_email="support@taosdata.com",
description="TDengine python client package",
long_description=long_description,
long_description_content_type="text/markdown",
url="https://github.com/taosdata/TDengine/tree/develop/src/connector/python",
packages=setuptools.find_packages(),
classifiers=[
"Environment :: Console",
"Environment :: MacOS X",
"Environment :: Win32 (MS Windows)",
"Programming Language :: Python",
"Programming Language :: Python :: 3",
"Programming Language :: Python :: 3.6",
"Programming Language :: Python :: 3.7",
"Programming Language :: Python :: 3.8",
"Programming Language :: Python :: 3.9",
"License :: OSI Approved :: GNU Affero General Public License v3 or later (AGPLv3+)",
"Operating System :: MacOS",
"Programming Language :: Python :: 2.7",
"Operating System :: Linux",
"Operating System :: POSIX :: Linux",
"Operating System :: Microsoft :: Windows",
"Operating System :: Microsoft :: Windows :: Windows 10",
],
)
src/connector/python/taos/__init__.py 已删除 100644 → 0
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# encoding:UTF-8
"""
# TDengine Connector for Python
[TDengine](https://github.com/taosdata/TDengine) connector for Python enables python programs to access TDengine,
using an API which is compliant with the Python DB API 2.0 (PEP-249). It uses TDengine C client library for client server communications.
## Install
```sh
git clone --depth 1 https://github.com/taosdata/TDengine.git
pip install ./TDengine/src/connector/python
```
## Source Code
[TDengine](https://github.com/taosdata/TDengine) connector for Python source code is hosted on [GitHub](https://github.com/taosdata/TDengine/tree/develop/src/connector/python).
## Examples
### Query with PEP-249 API
```python
import taos
conn = taos.connect()
cursor = conn.cursor()
cursor.execute("show databases")
results = cursor.fetchall()
for row in results:
print(row)
cursor.close()
conn.close()
```
### Query with objective API
```python
import taos
conn = taos.connect()
conn.exec("create database if not exists pytest")
result = conn.query("show databases")
num_of_fields = result.field_count
for field in result.fields:
print(field)
for row in result:
print(row)
result.close()
conn.exec("drop database pytest")
conn.close()
```
### Query with async API
```python
from taos import *
from ctypes import *
import time
def fetch_callback(p_param, p_result, num_of_rows):
print("fetched ", num_of_rows, "rows")
p = cast(p_param, POINTER(Counter))
result = TaosResult(p_result)
if num_of_rows == 0:
print("fetching completed")
p.contents.done = True
result.close()
return
if num_of_rows < 0:
p.contents.done = True
result.check_error(num_of_rows)
result.close()
return None
for row in result.rows_iter(num_of_rows):
# print(row)
None
p.contents.count += result.row_count
result.fetch_rows_a(fetch_callback, p_param)
def query_callback(p_param, p_result, code):
# type: (c_void_p, c_void_p, c_int) -> None
if p_result is None:
return
result = TaosResult(p_result)
if code == 0:
result.fetch_rows_a(fetch_callback, p_param)
result.check_error(code)
class Counter(Structure):
_fields_ = [("count", c_int), ("done", c_bool)]
def __str__(self):
return "{ count: %d, done: %s }" % (self.count, self.done)
def test_query(conn):
# type: (TaosConnection) -> None
counter = Counter(count=0)
conn.query_a("select * from log.log", query_callback, byref(counter))
while not counter.done:
print("wait query callback")
time.sleep(1)
print(counter)
conn.close()
if __name__ == "__main__":
test_query(connect())
```
### Statement API - Bind row after row
```python
from taos import *
conn = connect()
dbname = "pytest_taos_stmt"
conn.exec("drop database if exists %s" % dbname)
conn.exec("create database if not exists %s" % dbname)
conn.select_db(dbname)
conn.exec(
"create table if not exists log(ts timestamp, bo bool, nil tinyint, \\
ti tinyint, si smallint, ii int, bi bigint, tu tinyint unsigned, \\
su smallint unsigned, iu int unsigned, bu bigint unsigned, \\
ff float, dd double, bb binary(100), nn nchar(100), tt timestamp)",
)
stmt = conn.statement("insert into log values(?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?)")
params = new_bind_params(16)
params[0].timestamp(1626861392589)
params[1].bool(True)
params[2].null()
params[3].tinyint(2)
params[4].smallint(3)
params[5].int(4)
params[6].bigint(5)
params[7].tinyint_unsigned(6)
params[8].smallint_unsigned(7)
params[9].int_unsigned(8)
params[10].bigint_unsigned(9)
params[11].float(10.1)
params[12].double(10.11)
params[13].binary("hello")
params[14].nchar("stmt")
params[15].timestamp(1626861392589)
stmt.bind_param(params)
params[0].timestamp(1626861392590)
params[15].null()
stmt.bind_param(params)
stmt.execute()
result = stmt.use_result()
assert result.affected_rows == 2
result.close()
result = conn.query("select * from log")
for row in result:
print(row)
result.close()
stmt.close()
conn.close()
```
### Statement API - Bind multi rows
```python
from taos import *
conn = connect()
dbname = "pytest_taos_stmt"
conn.exec("drop database if exists %s" % dbname)
conn.exec("create database if not exists %s" % dbname)
conn.select_db(dbname)
conn.exec(
"create table if not exists log(ts timestamp, bo bool, nil tinyint, \\
ti tinyint, si smallint, ii int, bi bigint, tu tinyint unsigned, \\
su smallint unsigned, iu int unsigned, bu bigint unsigned, \\
ff float, dd double, bb binary(100), nn nchar(100), tt timestamp)",
)
stmt = conn.statement("insert into log values(?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?)")
params = new_multi_binds(16)
params[0].timestamp((1626861392589, 1626861392590, 1626861392591))
params[1].bool((True, None, False))
params[2].tinyint([-128, -128, None]) # -128 is tinyint null
params[3].tinyint([0, 127, None])
params[4].smallint([3, None, 2])
params[5].int([3, 4, None])
params[6].bigint([3, 4, None])
params[7].tinyint_unsigned([3, 4, None])
params[8].smallint_unsigned([3, 4, None])
params[9].int_unsigned([3, 4, None])
params[10].bigint_unsigned([3, 4, None])
params[11].float([3, None, 1])
params[12].double([3, None, 1.2])
params[13].binary(["abc", "dddafadfadfadfadfa", None])
params[14].nchar(["涛思数据", None, "a long string with 中文字符"])
params[15].timestamp([None, None, 1626861392591])
stmt.bind_param_batch(params)
stmt.execute()
result = stmt.use_result()
assert result.affected_rows == 3
result.close()
result = conn.query("select * from log")
for row in result:
print(row)
result.close()
stmt.close()
conn.close()
```
### Statement API - Subscribe
```python
import taos
conn = taos.connect()
dbname = "pytest_taos_subscribe_callback"
conn.exec("drop database if exists %s" % dbname)
conn.exec("create database if not exists %s" % dbname)
conn.select_db(dbname)
conn.exec("create table if not exists log(ts timestamp, n int)")
for i in range(10):
conn.exec("insert into log values(now, %d)" % i)
sub = conn.subscribe(True, "test", "select * from log", 1000)
print("# consume from begin")
for ts, n in sub.consume():
print(ts, n)
print("# consume new data")
for i in range(5):
conn.exec("insert into log values(now, %d)(now+1s, %d)" % (i, i))
result = sub.consume()
for ts, n in result:
print(ts, n)
print("# consume with a stop condition")
for i in range(10):
conn.exec("insert into log values(now, %d)" % int(random() * 10))
result = sub.consume()
try:
ts, n = next(result)
print(ts, n)
if n > 5:
result.stop_query()
print("## stopped")
break
except StopIteration:
continue
sub.close()
conn.exec("drop database if exists %s" % dbname)
conn.close()
```
### Statement API - Subscribe asynchronously with callback
```python
from taos import *
from ctypes import *
import time
def subscribe_callback(p_sub, p_result, p_param, errno):
# type: (c_void_p, c_void_p, c_void_p, c_int) -> None
print("# fetch in callback")
result = TaosResult(p_result)
result.check_error(errno)
for row in result.rows_iter():
ts, n = row()
print(ts, n)
def test_subscribe_callback(conn):
# type: (TaosConnection) -> None
dbname = "pytest_taos_subscribe_callback"
try:
conn.exec("drop database if exists %s" % dbname)
conn.exec("create database if not exists %s" % dbname)
conn.select_db(dbname)
conn.exec("create table if not exists log(ts timestamp, n int)")
print("# subscribe with callback")
sub = conn.subscribe(False, "test", "select * from log", 1000, subscribe_callback)
for i in range(10):
conn.exec("insert into log values(now, %d)" % i)
time.sleep(0.7)
sub.close()
conn.exec("drop database if exists %s" % dbname)
conn.close()
except Exception as err:
conn.exec("drop database if exists %s" % dbname)
conn.close()
raise err
if __name__ == "__main__":
test_subscribe_callback(connect())
```
### Statement API - Stream
```python
from taos import *
from ctypes import *
def stream_callback(p_param, p_result, p_row):
# type: (c_void_p, c_void_p, c_void_p) -> None
if p_result is None or p_row is None:
return
result = TaosResult(p_result)
row = TaosRow(result, p_row)
try:
ts, count = row()
p = cast(p_param, POINTER(Counter))
p.contents.count += count
print("[%s] inserted %d in 5s, total count: %d" % (ts.strftime("%Y-%m-%d %H:%M:%S"), count, p.contents.count))
except Exception as err:
print(err)
raise err
class Counter(ctypes.Structure):
_fields_ = [
("count", c_int),
]
def __str__(self):
return "%d" % self.count
def test_stream(conn):
# type: (TaosConnection) -> None
dbname = "pytest_taos_stream"
try:
conn.exec("drop database if exists %s" % dbname)
conn.exec("create database if not exists %s" % dbname)
conn.select_db(dbname)
conn.exec("create table if not exists log(ts timestamp, n int)")
result = conn.query("select count(*) from log interval(5s)")
assert result.field_count == 2
counter = Counter()
counter.count = 0
stream = conn.stream("select count(*) from log interval(5s)", stream_callback, param=byref(counter))
for _ in range(0, 20):
conn.exec("insert into log values(now,0)(now+1s, 1)(now + 2s, 2)")
time.sleep(2)
stream.close()
conn.exec("drop database if exists %s" % dbname)
conn.close()
except Exception as err:
conn.exec("drop database if exists %s" % dbname)
conn.close()
raise err
if __name__ == "__main__":
test_stream(connect())
```
### Insert with line protocol
```python
import taos
conn = taos.connect()
dbname = "pytest_line"
conn.exec("drop database if exists %s" % dbname)
conn.exec("create database if not exists %s precision 'us'" % dbname)
conn.select_db(dbname)
lines = [
'st,t1=3i64,t2=4f64,t3="t3" c1=3i64,c3=L"passit",c2=false,c4=4f64 1626006833639000000',
'st,t1=4i64,t3="t4",t2=5f64,t4=5f64 c1=3i64,c3=L"passitagin",c2=true,c4=5f64,c5=5f64,c6=7u64 1626006933640000000',
'stf,t1=4i64,t3="t4",t2=5f64,t4=5f64 c1=3i64,c3=L"passitagin_stf",c2=false,c5=5f64,c6=7u64 1626006933641000000',
]
conn.schemaless_insert(lines, 0, "ns")
print("inserted")
lines = [
'stf,t1=5i64,t3="t4",t2=5f64,t4=5f64 c1=3i64,c3=L"passitagin_stf",c2=false,c5=5f64,c6=7u64 1626006933641000000',
]
conn.schemaless_insert(lines, 0, "ns")
result = conn.query("show tables")
for row in result:
print(row)
result.close()
conn.exec("drop database if exists %s" % dbname)
conn.close()
```
## License - AGPL-3.0
Keep same with [TDengine](https://github.com/taosdata/TDengine).
"""
from .connection import TaosConnection
# For some reason, the following is needed for VS Code (through PyLance) to
# recognize that "error" is a valid module of the "taos" package.
from .error import *
from .bind import *
from .field import *
from .cursor import *
from .result import *
from .statement import *
from .subscription import *
from .schemaless import *
from taos._version import __version__
# Globals
threadsafety = 0
paramstyle = "pyformat"
__all__ = [
"__version__",
# functions
"connect",
"new_bind_param",
"new_bind_params",
"new_multi_binds",
"new_multi_bind",
# objects
"TaosBind",
"TaosConnection",
"TaosCursor",
"TaosResult",
"TaosRows",
"TaosRow",
"TaosStmt",
"PrecisionEnum",
"SmlPrecision",
"SmlProtocol"
]
def connect(*args, **kwargs):
# type: (..., ...) -> TaosConnection
"""Function to return a TDengine connector object
Current supporting keyword parameters:
@dsn: Data source name as string
@user: Username as string(optional)
@password: Password as string(optional)
@host: Hostname(optional)
@database: Database name(optional)
@rtype: TDengineConnector
"""
return TaosConnection(*args, **kwargs)
src/connector/python/taos/bind.py 已删除 100644 → 0
浏览文件 @ 57e0ac28
# encoding:UTF-8
import ctypes
from .constants import FieldType
from .error import *
from .precision import *
from datetime import datetime
from ctypes import *
import sys
_datetime_epoch = datetime.utcfromtimestamp(0)
def _is_not_none(obj):
return obj != None
class TaosBind(ctypes.Structure):
_fields_ = [
("buffer_type", c_int),
("buffer", c_void_p),
("buffer_length", c_size_t),
("length", POINTER(c_size_t)),
("is_null", POINTER(c_int)),
("is_unsigned", c_int),
("error", POINTER(c_int)),
("u", c_int64),
("allocated", c_int),
]
def null(self):
self.buffer_type = FieldType.C_NULL
self.is_null = pointer(c_int(1))
def bool(self, value):
self.buffer_type = FieldType.C_BOOL
self.buffer = cast(pointer(c_bool(value)), c_void_p)
self.buffer_length = sizeof(c_bool)
def tinyint(self, value):
self.buffer_type = FieldType.C_TINYINT
self.buffer = cast(pointer(c_int8(value)), c_void_p)
self.buffer_length = sizeof(c_int8)
def smallint(self, value):
self.buffer_type = FieldType.C_SMALLINT
self.buffer = cast(pointer(c_int16(value)), c_void_p)
self.buffer_length = sizeof(c_int16)
def int(self, value):
self.buffer_type = FieldType.C_INT
self.buffer = cast(pointer(c_int32(value)), c_void_p)
self.buffer_length = sizeof(c_int32)
def bigint(self, value):
self.buffer_type = FieldType.C_BIGINT
self.buffer = cast(pointer(c_int64(value)), c_void_p)
self.buffer_length = sizeof(c_int64)
def float(self, value):
self.buffer_type = FieldType.C_FLOAT
self.buffer = cast(pointer(c_float(value)), c_void_p)
self.buffer_length = sizeof(c_float)
def double(self, value):
self.buffer_type = FieldType.C_DOUBLE
self.buffer = cast(pointer(c_double(value)), c_void_p)
self.buffer_length = sizeof(c_double)
def binary(self, value):
buffer = None
length = 0
if isinstance(value, str):
bytes = value.encode("utf-8")
buffer = create_string_buffer(bytes)
length = len(bytes)
else:
buffer = value
length = len(value)
self.buffer_type = FieldType.C_BINARY
self.buffer = cast(buffer, c_void_p)
self.buffer_length = length
self.length = pointer(c_size_t(self.buffer_length))
def timestamp(self, value, precision=PrecisionEnum.Milliseconds):
if type(value) is datetime:
if precision == PrecisionEnum.Milliseconds:
ts = int(round((value - _datetime_epoch).total_seconds() * 1000))
elif precision == PrecisionEnum.Microseconds:
ts = int(round((value - _datetime_epoch).total_seconds() * 10000000))
else:
raise PrecisionError("datetime do not support nanosecond precision")
elif type(value) is float:
if precision == PrecisionEnum.Milliseconds:
ts = int(round(value * 1000))
elif precision == PrecisionEnum.Microseconds:
ts = int(round(value * 10000000))
else:
raise PrecisionError("time float do not support nanosecond precision")
elif isinstance(value, int) and not isinstance(value, bool):
ts = value
elif isinstance(value, str):
value = datetime.fromisoformat(value)
if precision == PrecisionEnum.Milliseconds:
ts = int(round(value * 1000))
elif precision == PrecisionEnum.Microseconds:
ts = int(round(value * 10000000))
else:
raise PrecisionError("datetime do not support nanosecond precision")
self.buffer_type = FieldType.C_TIMESTAMP
self.buffer = cast(pointer(c_int64(ts)), c_void_p)
self.buffer_length = sizeof(c_int64)
def nchar(self, value):
buffer = None
length = 0
if isinstance(value, str):
bytes = value.encode("utf-8")
buffer = create_string_buffer(bytes)
length = len(bytes)
else:
buffer = value
length = len(value)
self.buffer_type = FieldType.C_NCHAR
self.buffer = cast(buffer, c_void_p)
self.buffer_length = length
self.length = pointer(c_size_t(self.buffer_length))
def json(self, value):
buffer = None
length = 0
if isinstance(value, str):
bytes = value.encode("utf-8")
buffer = create_string_buffer(bytes)
length = len(bytes)
else:
buffer = value
length = len(value)
self.buffer_type = FieldType.C_JSON
self.buffer = cast(buffer, c_void_p)
self.buffer_length = length
self.length = pointer(c_size_t(self.buffer_length))
def tinyint_unsigned(self, value):
self.buffer_type = FieldType.C_TINYINT_UNSIGNED
self.buffer = cast(pointer(c_uint8(value)), c_void_p)
self.buffer_length = sizeof(c_uint8)
def smallint_unsigned(self, value):
self.buffer_type = FieldType.C_SMALLINT_UNSIGNED
self.buffer = cast(pointer(c_uint16(value)), c_void_p)
self.buffer_length = sizeof(c_uint16)
def int_unsigned(self, value):
self.buffer_type = FieldType.C_INT_UNSIGNED
self.buffer = cast(pointer(c_uint32(value)), c_void_p)
self.buffer_length = sizeof(c_uint32)
def bigint_unsigned(self, value):
self.buffer_type = FieldType.C_BIGINT_UNSIGNED
self.buffer = cast(pointer(c_uint64(value)), c_void_p)
self.buffer_length = sizeof(c_uint64)
def _datetime_to_timestamp(value, precision):
# type: (datetime | float | int | str | c_int64, PrecisionEnum) -> c_int64
if value is None:
return FieldType.C_BIGINT_NULL
if type(value) is datetime:
if precision == PrecisionEnum.Milliseconds:
return int(round((value - _datetime_epoch).total_seconds() * 1000))
elif precision == PrecisionEnum.Microseconds:
return int(round((value - _datetime_epoch).total_seconds() * 10000000))
else:
raise PrecisionError("datetime do not support nanosecond precision")
elif type(value) is float:
if precision == PrecisionEnum.Milliseconds:
return int(round(value * 1000))
elif precision == PrecisionEnum.Microseconds:
return int(round(value * 10000000))
else:
raise PrecisionError("time float do not support nanosecond precision")
elif isinstance(value, int) and not isinstance(value, bool):
return c_int64(value)
elif isinstance(value, str):
value = datetime.fromisoformat(value)
if precision == PrecisionEnum.Milliseconds:
return int(round(value * 1000))
elif precision == PrecisionEnum.Microseconds:
return int(round(value * 10000000))
else:
raise PrecisionError("datetime do not support nanosecond precision")
elif isinstance(value, c_int64):
return value
return FieldType.C_BIGINT_NULL
class TaosMultiBind(ctypes.Structure):
_fields_ = [
("buffer_type", c_int),
("buffer", c_void_p),
("buffer_length", c_size_t),
("length", POINTER(c_int32)),
("is_null", c_char_p),
("num", c_int),
]
def null(self, num):
self.buffer_type = FieldType.C_NULL
self.is_null = cast((c_char * num)(*[1 for _ in range(num)]), c_char_p)
self.buffer = c_void_p(None)
self.num = num
def bool(self, values):
try:
buffer = cast(values, c_void_p)
except:
buffer_type = c_int8 * len(values)
try:
buffer = buffer_type(*values)
except:
buffer = buffer_type(*[v if v is not None else FieldType.C_BOOL_NULL for v in values])
self.buffer = cast(buffer, c_void_p)
self.num = len(values)
self.buffer_type = FieldType.C_BOOL
self.buffer_length = sizeof(c_bool)
def tinyint(self, values):
self.buffer_type = FieldType.C_TINYINT
self.buffer_length = sizeof(c_int8)
try:
buffer = cast(values, c_void_p)
except:
buffer_type = c_int8 * len(values)
try:
buffer = buffer_type(*values)
except:
buffer = buffer_type(*[v if v is not None else FieldType.C_TINYINT_NULL for v in values])
self.buffer = cast(buffer, c_void_p)
self.num = len(values)
def smallint(self, values):
self.buffer_type = FieldType.C_SMALLINT
self.buffer_length = sizeof(c_int16)
try:
buffer = cast(values, c_void_p)
except:
buffer_type = c_int16 * len(values)
try:
buffer = buffer_type(*values)
except:
buffer = buffer_type(*[v if v is not None else FieldType.C_SMALLINT_NULL for v in values])
self.buffer = cast(buffer, c_void_p)
self.num = len(values)
def int(self, values):
self.buffer_type = FieldType.C_INT
self.buffer_length = sizeof(c_int32)
try:
buffer = cast(values, c_void_p)
except:
buffer_type = c_int32 * len(values)
try:
buffer = buffer_type(*values)
except:
buffer = buffer_type(*[v if v is not None else FieldType.C_INT_NULL for v in values])
self.buffer = cast(buffer, c_void_p)
self.num = len(values)
def bigint(self, values):
self.buffer_type = FieldType.C_BIGINT
self.buffer_length = sizeof(c_int64)
try:
buffer = cast(values, c_void_p)
except:
buffer_type = c_int64 * len(values)
try:
buffer = buffer_type(*values)
except:
buffer = buffer_type(*[v if v is not None else FieldType.C_BIGINT_NULL for v in values])
self.buffer = cast(buffer, c_void_p)
self.num = len(values)
def float(self, values):
self.buffer_type = FieldType.C_FLOAT
self.buffer_length = sizeof(c_float)
try:
buffer = cast(values, c_void_p)
except:
buffer_type = c_float * len(values)
try:
buffer = buffer_type(*values)
except:
buffer = buffer_type(*[v if v is not None else FieldType.C_FLOAT_NULL for v in values])
self.buffer = cast(buffer, c_void_p)
self.num = len(values)
def double(self, values):
self.buffer_type = FieldType.C_DOUBLE
self.buffer_length = sizeof(c_double)
try:
buffer = cast(values, c_void_p)
except:
buffer_type = c_double * len(values)
try:
buffer = buffer_type(*values)
except:
buffer = buffer_type(*[v if v is not None else FieldType.C_DOUBLE_NULL for v in values])
self.buffer = cast(buffer, c_void_p)
self.num = len(values)
def _str_to_buffer(self, values):
self.num = len(values)
is_null = [1 if v is None else 0 for v in values]
self.is_null = cast((c_byte * self.num)(*is_null), c_char_p)
if sum(is_null) == self.num:
self.length = (c_int32 * len(values))(0 * self.num)
return
if sys.version_info < (3, 0):
_bytes = [bytes(value) if value is not None else None for value in values]
buffer_length = max(len(b) + 1 for b in _bytes if b is not None)
buffers = [
create_string_buffer(b, buffer_length) if b is not None else create_string_buffer(buffer_length)
for b in _bytes
]
buffer_all = b''.join(v[:] for v in buffers)
self.buffer = cast(c_char_p(buffer_all), c_void_p)
else:
_bytes = [value.encode("utf-8") if value is not None else None for value in values]
buffer_length = max(len(b) for b in _bytes if b is not None)
self.buffer = cast(
c_char_p(
b"".join(
[
create_string_buffer(b, buffer_length)
if b is not None
else create_string_buffer(buffer_length)
for b in _bytes
]
)
),
c_void_p,
)
self.length = (c_int32 * len(values))(*[len(b) if b is not None else 0 for b in _bytes])
self.buffer_length = buffer_length
def binary(self, values):
self.buffer_type = FieldType.C_BINARY
self._str_to_buffer(values)
def timestamp(self, values, precision=PrecisionEnum.Milliseconds):
try:
buffer = cast(values, c_void_p)
except:
buffer_type = c_int64 * len(values)
buffer = buffer_type(*[_datetime_to_timestamp(value, precision) for value in values])
self.buffer_type = FieldType.C_TIMESTAMP
self.buffer = cast(buffer, c_void_p)
self.buffer_length = sizeof(c_int64)
self.num = len(values)
def nchar(self, values):
# type: (list[str]) -> None
self.buffer_type = FieldType.C_NCHAR
self._str_to_buffer(values)
def json(self, values):
# type: (list[str]) -> None
self.buffer_type = FieldType.C_JSON
self._str_to_buffer(values)
def tinyint_unsigned(self, values):
self.buffer_type = FieldType.C_TINYINT_UNSIGNED
self.buffer_length = sizeof(c_uint8)
try:
buffer = cast(values, c_void_p)
except:
buffer_type = c_uint8 * len(values)
try:
buffer = buffer_type(*values)
except:
buffer = buffer_type(*[v if v is not None else FieldType.C_TINYINT_UNSIGNED_NULL for v in values])
self.buffer = cast(buffer, c_void_p)
self.num = len(values)
def smallint_unsigned(self, values):
self.buffer_type = FieldType.C_SMALLINT_UNSIGNED
self.buffer_length = sizeof(c_uint16)
try:
buffer = cast(values, c_void_p)
except:
buffer_type = c_uint16 * len(values)
try:
buffer = buffer_type(*values)
except:
buffer = buffer_type(*[v if v is not None else FieldType.C_SMALLINT_UNSIGNED_NULL for v in values])
self.buffer = cast(buffer, c_void_p)
self.num = len(values)
def int_unsigned(self, values):
self.buffer_type = FieldType.C_INT_UNSIGNED
self.buffer_length = sizeof(c_uint32)
try:
buffer = cast(values, c_void_p)
except:
buffer_type = c_uint32 * len(values)
try:
buffer = buffer_type(*values)
except:
buffer = buffer_type(*[v if v is not None else FieldType.C_INT_UNSIGNED_NULL for v in values])
self.buffer = cast(buffer, c_void_p)
self.num = len(values)
def bigint_unsigned(self, values):
self.buffer_type = FieldType.C_BIGINT_UNSIGNED
self.buffer_length = sizeof(c_uint64)
try:
buffer = cast(values, c_void_p)
except:
buffer_type = c_uint64 * len(values)
try:
buffer = buffer_type(*values)
except:
buffer = buffer_type(*[v if v is not None else FieldType.C_BIGINT_UNSIGNED_NULL for v in values])
self.buffer = cast(buffer, c_void_p)
self.num = len(values)
def new_bind_param():
# type: () -> TaosBind
return TaosBind()
def new_bind_params(size):
# type: (int) -> Array[TaosBind]
return (TaosBind * size)()
def new_multi_bind():
# type: () -> TaosMultiBind
return TaosMultiBind()
def new_multi_binds(size):
# type: (int) -> Array[TaosMultiBind]
return (TaosMultiBind * size)()
src/connector/python/taos/cinterface.py 已删除 100644 → 0
浏览文件 @ 57e0ac28
此差异已折叠。
src/connector/python/taos/connection.py 已删除 100644 → 0
浏览文件 @ 57e0ac28
# encoding:UTF-8
from types import FunctionType
from .cinterface import *
from .cursor import TaosCursor
from .subscription import TaosSubscription
from .statement import TaosStmt
from .stream import TaosStream
from .result import *
class TaosConnection(object):
"""TDengine connection object"""
def __init__(self, *args, **kwargs):
self._conn = None
self._host = None
self._user = "root"
self._password = "taosdata"
self._database = None
self._port = 0
self._config = None
self._chandle = None
self.config(**kwargs)
def config(self, **kwargs):
# host
if "host" in kwargs:
self._host = kwargs["host"]
# user
if "user" in kwargs:
self._user = kwargs["user"]
# password
if "password" in kwargs:
self._password = kwargs["password"]
# database
if "database" in kwargs:
self._database = kwargs["database"]
# port
if "port" in kwargs:
self._port = kwargs["port"]
# config
if "config" in kwargs:
self._config = kwargs["config"]
self._chandle = CTaosInterface(self._config)
self._conn = self._chandle.connect(self._host, self._user, self._password, self._database, self._port)
def close(self):
"""Close current connection."""
if self._conn:
taos_close(self._conn)
self._conn = None
@property
def client_info(self):
# type: () -> str
return taos_get_client_info()
@property
def server_info(self):
# type: () -> str
return taos_get_server_info(self._conn)
def select_db(self, database):
# type: (str) -> None
taos_select_db(self._conn, database)
def execute(self, sql):
# type: (str) -> int
"""Simplely execute sql ignoring the results"""
return self.query(sql).affected_rows
def query(self, sql):
# type: (str) -> TaosResult
result = taos_query(self._conn, sql)
return TaosResult(result, True, self)
def query_a(self, sql, callback, param):
# type: (str, async_query_callback_type, c_void_p) -> None
"""Asynchronously query a sql with callback function"""
taos_query_a(self._conn, sql, callback, param)
def subscribe(self, restart, topic, sql, interval, callback=None, param=None):
# type: (bool, str, str, int, subscribe_callback_type, c_void_p) -> TaosSubscription
"""Create a subscription."""
if self._conn is None:
return None
sub = taos_subscribe(self._conn, restart, topic, sql, interval, callback, param)
return TaosSubscription(sub, callback != None)
def statement(self, sql=None):
# type: (str | None) -> TaosStmt
if self._conn is None:
return None
stmt = taos_stmt_init(self._conn)
if sql != None:
taos_stmt_prepare(stmt, sql)
return TaosStmt(stmt)
def load_table_info(self, tables):
# type: (str) -> None
taos_load_table_info(self._conn, tables)
def stream(self, sql, callback, stime=0, param=None, callback2=None):
# type: (str, Callable[[Any, TaosResult, TaosRows], None], int, Any, c_void_p) -> TaosStream
# cb = cast(callback, stream_callback_type)
# ref = byref(cb)
stream = taos_open_stream(self._conn, sql, callback, stime, param, callback2)
return TaosStream(stream)
def schemaless_insert(self, lines, protocol, precision):
# type: (list[str], SmlProtocol, SmlPrecision) -> int
"""
1.Line protocol and schemaless support
## Example
```python
import taos
conn = taos.connect()
conn.exec("drop database if exists test")
conn.select_db("test")
lines = [
'ste,t2=5,t3=L"ste" c1=true,c2=4,c3="string" 1626056811855516532',
]
conn.schemaless_insert(lines, 0, "ns")
```
2.OpenTSDB telnet style API format support
## Example
import taos
conn = taos.connect()
conn.exec("drop database if exists test")
conn.select_db("test")
lines = [
'cpu_load 1626056811855516532ns 2.0f32 id="tb1",host="host0",interface="eth0"',
]
conn.schemaless_insert(lines, 1, None)
3.OpenTSDB HTTP JSON format support
## Example
import taos
conn = taos.connect()
conn.exec("drop database if exists test")
conn.select_db("test")
payload = ['''
{
"metric": "cpu_load_0",
"timestamp": 1626006833610123,
"value": 55.5,
"tags":
{
"host": "ubuntu",
"interface": "eth0",
"Id": "tb0"
}
}
''']
conn.schemaless_insert(lines, 2, None)
"""
print(lines, protocol, precision)
return taos_schemaless_insert(self._conn, lines, protocol, precision)
def cursor(self):
# type: () -> TaosCursor
"""Return a new Cursor object using the connection."""
return TaosCursor(self)
def commit(self):
"""Commit any pending transaction to the database.
Since TDengine do not support transactions, the implement is void functionality.
"""
pass
def rollback(self):
"""Void functionality"""
pass
def clear_result_set(self):
"""Clear unused result set on this connection."""
pass
def __del__(self):
self.close()
if __name__ == "__main__":
conn = TaosConnection()
conn.close()
print("Hello world")
src/connector/python/taos/constants.py 已删除 100644 → 0
浏览文件 @ 57e0ac28
# encoding:UTF-8
"""Constants in TDengine python
"""
import ctypes, struct
class FieldType(object):
"""TDengine Field Types"""
# type_code
C_NULL = 0
C_BOOL = 1
C_TINYINT = 2
C_SMALLINT = 3
C_INT = 4
C_BIGINT = 5
C_FLOAT = 6
C_DOUBLE = 7
C_BINARY = 8
C_TIMESTAMP = 9
C_NCHAR = 10
C_TINYINT_UNSIGNED = 11
C_SMALLINT_UNSIGNED = 12
C_INT_UNSIGNED = 13
C_BIGINT_UNSIGNED = 14
C_JSON = 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 = ctypes.c_float(struct.unpack("<f", b"\x00\x00\xf0\x7f")[0])
C_DOUBLE_NULL = ctypes.c_double(struct.unpack("<d", b"\x00\x00\x00\x00\x00\xff\xff\x7f")[0])
C_BINARY_NULL = bytearray([int("0xff", 16)])
# Timestamp precision definition
C_TIMESTAMP_MILLI = 0
C_TIMESTAMP_MICRO = 1
C_TIMESTAMP_NANO = 2
C_TIMESTAMP_UNKNOWN = 3
src/connector/python/taos/cursor.py 已删除 100644 → 0
浏览文件 @ 57e0ac28
# encoding:UTF-8
from .cinterface import *
from .error import *
from .constants import FieldType
from .result import *
class TaosCursor(object):
"""Database cursor which is used to manage the context of a fetch operation.
Attributes:
.description: Read-only attribute consists of 7-item sequences:
> name (mandatory)
> type_code (mandatory)
> display_size
> internal_size
> precision
> scale
> null_ok
This attribute will be None for operations that do not return rows or
if the cursor has not had an operation invoked via the .execute*() method yet.
.rowcount:This read-only attribute specifies the number of rows that the last
.execute*() produced (for DQL statements like SELECT) or affected
"""
def __init__(self, connection=None):
self._description = []
self._rowcount = -1
self._connection = None
self._result = None
self._fields = None
self._block = None
self._block_rows = -1
self._block_iter = 0
self._affected_rows = 0
self._logfile = ""
if connection is not None:
self._connection = connection
def __iter__(self):
return self
def __next__(self):
return self._taos_next()
def next(self):
return self._taos_next()
def _taos_next(self):
if self._result is None or self._fields is None:
raise OperationalError("Invalid use of fetch iterator")
if self._block_rows <= self._block_iter:
block, self._block_rows = taos_fetch_row(self._result, self._fields)
if self._block_rows == 0:
raise StopIteration
self._block = list(map(tuple, zip(*block)))
self._block_iter = 0
data = self._block[self._block_iter]
self._block_iter += 1
return data
@property
def description(self):
"""Return the description of the object."""
return self._description
@property
def rowcount(self):
"""Return the rowcount of the object"""
return self._rowcount
@property
def affected_rows(self):
"""Return the rowcount of insertion"""
return self._affected_rows
def callproc(self, procname, *args):
"""Call a stored database procedure with the given name.
Void functionality since no stored procedures.
"""
pass
def log(self, logfile):
self._logfile = logfile
def close(self):
"""Close the cursor."""
if self._connection is None:
return False
self._reset_result()
self._connection = None
return True
def execute(self, operation, params=None):
"""Prepare and execute a database operation (query or command)."""
if not operation:
return None
if not self._connection:
# TODO : change the exception raised here
raise ProgrammingError("Cursor is not connected")
self._reset_result()
stmt = operation
if params is not None:
pass
# global querySeqNum
# querySeqNum += 1
# localSeqNum = querySeqNum # avoid race condition
# print(" >> Exec Query ({}): {}".format(localSeqNum, str(stmt)))
self._result = taos_query(self._connection._conn, stmt)
# print(" << Query ({}) Exec Done".format(localSeqNum))
if self._logfile:
with open(self._logfile, "a") as logfile:
logfile.write("%s;\n" % operation)
if taos_field_count(self._result) == 0:
affected_rows = taos_affected_rows(self._result)
self._affected_rows += affected_rows
return affected_rows
else:
self._fields = taos_fetch_fields(self._result)
return self._handle_result()
def executemany(self, operation, seq_of_parameters):
"""Prepare a database operation (query or command) and then execute it against all parameter sequences or mappings found in the sequence seq_of_parameters."""
pass
def fetchone(self):
"""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
def istype(self, col, dataType):
if dataType.upper() == "BOOL":
if self._description[col][1] == FieldType.C_BOOL:
return True
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_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:
return True
if dataType.upper() == "DOUBLE":
if self._description[col][1] == FieldType.C_DOUBLE:
return True
if dataType.upper() == "BINARY":
if self._description[col][1] == FieldType.C_BINARY:
return True
if dataType.upper() == "TIMESTAMP":
if self._description[col][1] == FieldType.C_TIMESTAMP:
return True
if dataType.upper() == "NCHAR":
if self._description[col][1] == FieldType.C_NCHAR:
return True
if dataType.upper() == "JSON":
if self._description[col][1] == FieldType.C_JSON:
return True
return False
def fetchall_row(self):
"""Fetch all (remaining) rows of a query result, returning them as a sequence of sequences (e.g. a list of tuples). Note that the cursor's arraysize attribute can affect the performance of this operation."""
if self._result is None or self._fields is None:
raise OperationalError("Invalid use of fetchall")
buffer = [[] for i in range(len(self._fields))]
self._rowcount = 0
while True:
block, num_of_fields = taos_fetch_row(self._result, self._fields)
errno = taos_errno(self._result)
if errno != 0:
raise ProgrammingError(taos_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:
raise OperationalError("Invalid use of fetchall")
fields = self._fields if self._fields is not None else taos_fetch_fields(self._result)
buffer = [[] for i in range(len(fields))]
self._rowcount = 0
while True:
block, num_of_fields = taos_fetch_block(self._result, self._fields)
errno = taos_errno(self._result)
if errno != 0:
raise ProgrammingError(taos_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 stop_query(self):
if self._result != None:
taos_stop_query(self._result)
def nextset(self):
""" """
pass
def setinputsize(self, sizes):
pass
def setutputsize(self, size, column=None):
pass
def _reset_result(self):
"""Reset the result to unused version."""
self._description = []
self._rowcount = -1
if self._result is not None:
taos_free_result(self._result)
self._result = None
self._fields = None
self._block = None
self._block_rows = -1
self._block_iter = 0
self._affected_rows = 0
def _handle_result(self):
"""Handle the return result from query."""
self._description = []
for ele in self._fields:
self._description.append((ele["name"], ele["type"], None, None, None, None, False))
return self._result
def __del__(self):
self.close()
src/connector/python/taos/error.py 已删除 100644 → 0
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# encoding:UTF-8
"""Python exceptions
"""
class Error(Exception):
def __init__(self, msg=None, errno=0xffff):
self.msg = msg
self.errno = errno
self._full_msg = "[0x%04x]: %s" % (self.errno & 0xffff, self.msg)
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."""
pass
class DatabaseError(Error):
"""Exception raised for errors that are related to the database."""
pass
class ConnectionError(Error):
"""Exceptin raised for connection failed"""
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"""
pass
class IntegrityError(DatabaseError):
"""Exception raised when the relational integrity of the database is affected."""
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
class StatementError(DatabaseError):
"""Exception raised in STMT API."""
pass
class ResultError(DatabaseError):
"""Result related APIs."""
pass
class SchemalessError(DatabaseError):
"""taos_schemaless_insert errors."""
def __init__(self, msg=None, errno=0xffff, affected_rows=0):
DatabaseError.__init__(self, msg, errno)
self.affected_rows = affected_rows
def __str__(self):
return self._full_msg + "(affected rows: %d)" % self.affected_rows
# @property
# def affected_rows(self):
# return self.affected_rows
class StatementError(DatabaseError):
"""Exception raised in STMT API."""
pass
class ResultError(DatabaseError):
"""Result related APIs."""
pass
class LinesError(DatabaseError):
"""taos_insert_lines errors."""
pass
\ No newline at end of file
src/connector/python/taos/field.py 已删除 100644 → 0
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# encoding:UTF-8
import ctypes
import math
import datetime
from ctypes import *
from .constants import FieldType
from .error import *
_datetime_epoch = datetime.datetime.fromtimestamp(0)
def _convert_millisecond_to_datetime(milli):
return _datetime_epoch + datetime.timedelta(seconds=milli / 1000.0)
def _convert_microsecond_to_datetime(micro):
return _datetime_epoch + datetime.timedelta(seconds=micro / 1000000.0)
def _convert_nanosecond_to_datetime(nanosec):
return nanosec
def _crow_timestamp_to_python(data, num_of_rows, nbytes=None, precision=FieldType.C_TIMESTAMP_UNKNOWN):
"""Function to convert C bool row to python row"""
_timestamp_converter = _convert_millisecond_to_datetime
if precision == FieldType.C_TIMESTAMP_MILLI:
_timestamp_converter = _convert_millisecond_to_datetime
elif precision == FieldType.C_TIMESTAMP_MICRO:
_timestamp_converter = _convert_microsecond_to_datetime
elif precision == FieldType.C_TIMESTAMP_NANO:
_timestamp_converter = _convert_nanosecond_to_datetime
else:
raise DatabaseError("Unknown precision returned from database")
return [
None if ele == FieldType.C_BIGINT_NULL else _timestamp_converter(ele)
for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_int64))[: abs(num_of_rows)]
]
def _crow_bool_to_python(data, num_of_rows, nbytes=None, precision=FieldType.C_TIMESTAMP_UNKNOWN):
"""Function to convert C bool row to python row"""
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)]
]
def _crow_tinyint_to_python(data, num_of_rows, nbytes=None, precision=FieldType.C_TIMESTAMP_UNKNOWN):
"""Function to convert C tinyint row to python row"""
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, precision=FieldType.C_TIMESTAMP_UNKNOWN):
"""Function to convert C tinyint row to python row"""
return [
None if ele == FieldType.C_TINYINT_UNSIGNED_NULL else ele
for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_ubyte))[: abs(num_of_rows)]
]
def _crow_smallint_to_python(data, num_of_rows, nbytes=None, precision=FieldType.C_TIMESTAMP_UNKNOWN):
"""Function to convert C smallint row to python row"""
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, precision=FieldType.C_TIMESTAMP_UNKNOWN):
"""Function to convert C smallint row to python row"""
return [
None if ele == FieldType.C_SMALLINT_UNSIGNED_NULL else ele
for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_ushort))[: abs(num_of_rows)]
]
def _crow_int_to_python(data, num_of_rows, nbytes=None, precision=FieldType.C_TIMESTAMP_UNKNOWN):
"""Function to convert C int row to python row"""
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, precision=FieldType.C_TIMESTAMP_UNKNOWN):
"""Function to convert C int row to python row"""
return [
None if ele == FieldType.C_INT_UNSIGNED_NULL else ele
for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_uint))[: abs(num_of_rows)]
]
def _crow_bigint_to_python(data, num_of_rows, nbytes=None, precision=FieldType.C_TIMESTAMP_UNKNOWN):
"""Function to convert C bigint row to python row"""
return [
None if ele == FieldType.C_BIGINT_NULL else ele
for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_int64))[: abs(num_of_rows)]
]
def _crow_bigint_unsigned_to_python(data, num_of_rows, nbytes=None, precision=FieldType.C_TIMESTAMP_UNKNOWN):
"""Function to convert C bigint row to python row"""
return [
None if ele == FieldType.C_BIGINT_UNSIGNED_NULL else ele
for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_uint64))[: abs(num_of_rows)]
]
def _crow_float_to_python(data, num_of_rows, nbytes=None, precision=FieldType.C_TIMESTAMP_UNKNOWN):
"""Function to convert C float row to python row"""
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, precision=FieldType.C_TIMESTAMP_UNKNOWN):
"""Function to convert C double row to python row"""
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, precision=FieldType.C_TIMESTAMP_UNKNOWN):
"""Function to convert C binary row to python row"""
assert nbytes is not None
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, precision=FieldType.C_TIMESTAMP_UNKNOWN):
"""Function to convert C nchar row to python row"""
assert nbytes is not None
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("utf-8"))
else:
res.append(
(
ctypes.cast(
data + nbytes * i,
ctypes.POINTER(ctypes.c_wchar * (nbytes // 4)),
)
)[0].value
)
except ValueError:
res.append(None)
return res
def _crow_binary_to_python_block(data, num_of_rows, nbytes=None, precision=FieldType.C_TIMESTAMP_UNKNOWN):
"""Function to convert C binary row to python row"""
assert nbytes is not None
res = []
for i in range(abs(num_of_rows)):
rbyte = ctypes.cast(data + nbytes * i, ctypes.POINTER(ctypes.c_short))[:1].pop()
chars = ctypes.cast(c_char_p(data + nbytes * i + 2), ctypes.POINTER(c_char * rbyte))
buffer = create_string_buffer(rbyte + 1)
buffer[:rbyte] = chars[0][:rbyte]
if rbyte == 1 and buffer[0] == b'\xff':
res.append(None)
else:
res.append(cast(buffer, c_char_p).value.decode("utf-8"))
return res
def _crow_nchar_to_python_block(data, num_of_rows, nbytes=None, precision=FieldType.C_TIMESTAMP_UNKNOWN):
"""Function to convert C nchar row to python row"""
assert nbytes is not None
res = []
for i in range(abs(num_of_rows)):
rbyte = ctypes.cast(data + nbytes * i, ctypes.POINTER(ctypes.c_short))[:1].pop()
chars = ctypes.cast(c_char_p(data + nbytes * i + 2), ctypes.POINTER(c_char * rbyte))
buffer = create_string_buffer(rbyte + 1)
buffer[:rbyte] = chars[0][:rbyte]
if rbyte == 4 and buffer[:4] == b'\xff'*4:
res.append(None)
else:
res.append(cast(buffer, c_char_p).value.decode("utf-8"))
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_BINARY: _crow_binary_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,
FieldType.C_JSON: _crow_nchar_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_BINARY: _crow_binary_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,
FieldType.C_JSON: _crow_nchar_to_python_block,
}
# Corresponding TAOS_FIELD structure in C
class TaosField(ctypes.Structure):
_fields_ = [
("_name", ctypes.c_char * 65),
("_type", ctypes.c_uint8),
("_bytes", ctypes.c_uint16),
]
@property
def name(self):
return self._name.decode("utf-8")
@property
def length(self):
"""alias to self.bytes"""
return self._bytes
@property
def bytes(self):
return self._bytes
@property
def type(self):
return self._type
def __dict__(self):
return {"name": self.name, "type": self.type, "bytes": self.length}
def __str__(self):
return "{name: %s, type: %d, bytes: %d}" % (self.name, self.type, self.length)
def __getitem__(self, item):
return getattr(self, item)
class TaosFields(object):
def __init__(self, fields, count):
if isinstance(fields, c_void_p):
self._fields = cast(fields, POINTER(TaosField))
if isinstance(fields, POINTER(TaosField)):
self._fields = fields
self._count = count
self._iter = 0
def as_ptr(self):
return self._fields
@property
def count(self):
return self._count
@property
def fields(self):
return self._fields
def __next__(self):
return self._next_field()
def next(self):
return self._next_field()
def _next_field(self):
if self._iter < self.count:
field = self._fields[self._iter]
self._iter += 1
return field
else:
raise StopIteration
def __getitem__(self, item):
return self._fields[item]
def __iter__(self):
return self
def __len__(self):
return self.count
src/connector/python/taos/precision.py 已删除 100644 → 0
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class PrecisionEnum(object):
"""Precision enums"""
Milliseconds = 0
Microseconds = 1
Nanoseconds = 2
class PrecisionError(Exception):
"""Python datetime does not support nanoseconds error"""
pass
src/connector/python/taos/result.py 已删除 100644 → 0
浏览文件 @ 57e0ac28
from .cinterface import *
# from .connection import TaosConnection
from .error import *
from ctypes import c_void_p
class TaosResult(object):
"""TDengine result interface"""
def __init__(self, result, close_after=False, conn=None):
# type: (c_void_p, bool, TaosConnection) -> TaosResult
# to make the __del__ order right
self._conn = conn
self._close_after = close_after
if isinstance(result, c_void_p):
self._result = result
else:
self._result = c_void_p(result)
self._fields = None
self._field_count = None
self._precision = None
self._block = None
self._block_length = None
self._row_count = 0
def __iter__(self):
return self
def __next__(self):
return self._next_row()
def next(self):
# fetch next row
return self._next_row()
def _next_row(self):
if self._result is None or self.fields is None:
raise OperationalError("Invalid use of fetch iterator")
if self._block is None or self._block_iter >= self._block_length:
self._block, self._block_length = self.fetch_block()
self._block_iter = 0
# self._row_count += self._block_length
raw = self._block[self._block_iter]
self._block_iter += 1
return raw
@property
def fields(self):
"""fields definitions of the current result"""
if self._result is None:
raise ResultError("no result object setted")
if self._fields is None:
self._fields = taos_fetch_fields(self._result)
return self._fields
@property
def field_count(self):
"""Field count of the current result, eq to taos_field_count(result)"""
return self.fields.count
@property
def row_count(self):
"""Return the rowcount of the object"""
return self._row_count
@property
def precision(self):
if self._precision is None:
self._precision = taos_result_precision(self._result)
return self._precision
@property
def affected_rows(self):
return taos_affected_rows(self._result)
# @property
def field_lengths(self):
return taos_fetch_lengths(self._result, self.field_count)
def rows_iter(self, num_of_rows=None):
return TaosRows(self, num_of_rows)
def blocks_iter(self):
return TaosBlocks(self)
def fetch_block(self):
if self._result is None:
raise OperationalError("Invalid use of fetch iterator")
block, length = taos_fetch_block_raw(self._result)
if length == 0:
raise StopIteration
precision = self.precision
field_count = self.field_count
fields = self.fields
blocks = [None] * field_count
lengths = self.field_lengths()
for i in range(field_count):
data = ctypes.cast(block, 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, length, lengths[i], precision)
return list(map(tuple, zip(*blocks))), length
def fetch_all(self):
if self._result is None:
raise OperationalError("Invalid use of fetchall")
if self._fields is None:
self._fields = taos_fetch_fields(self._result)
buffer = [[] for i in range(len(self._fields))]
self._row_count = 0
while True:
block, num_of_fields = taos_fetch_block(self._result, self._fields)
errno = taos_errno(self._result)
if errno != 0:
raise ProgrammingError(taos_errstr(self._result), errno)
if num_of_fields == 0:
break
self._row_count += num_of_fields
for i in range(len(self._fields)):
buffer[i].extend(block[i])
return list(map(tuple, zip(*buffer)))
def fetch_all_into_dict(self):
"""Fetch all rows and convert it to dict"""
names = [field.name for field in self.fields]
rows = self.fetch_all()
return list(dict(zip(names, row)) for row in rows)
def fetch_rows_a(self, callback, param):
taos_fetch_rows_a(self._result, callback, param)
def stop_query(self):
return taos_stop_query(self._result)
def errno(self):
"""**DO NOT** use this directly unless you know what you are doing"""
return taos_errno(self._result)
def errstr(self):
return taos_errstr(self._result)
def check_error(self, errno=None, close=True):
if errno is None:
errno = self.errno()
if errno != 0:
msg = self.errstr()
self.close()
raise OperationalError(msg, errno)
def close(self):
"""free result object."""
if self._result != None and self._close_after:
taos_free_result(self._result)
self._result = None
self._fields = None
self._field_count = None
self._field_lengths = None
def __del__(self):
self.close()
class TaosRows:
"""TDengine result rows iterator"""
def __init__(self, result, num_of_rows=None):
self._result = result
self._num_of_rows = num_of_rows
def __iter__(self):
return self
def __next__(self):
return self._next_row()
def next(self):
return self._next_row()
def _next_row(self):
if self._result is None:
raise OperationalError("Invalid use of fetch iterator")
if self._num_of_rows != None and self._num_of_rows <= self._result._row_count:
raise StopIteration
row = taos_fetch_row_raw(self._result._result)
if not row:
raise StopIteration
self._result._row_count += 1
return TaosRow(self._result, row)
@property
def row_count(self):
"""Return the rowcount of the object"""
return self._result._row_count
class TaosRow:
def __init__(self, result, row):
self._result = result
self._row = row
def __str__(self):
return taos_print_row(self._row, self._result.fields, self._result.field_count)
def __call__(self):
return self.as_tuple()
def _astuple(self):
return self.as_tuple()
def __iter__(self):
return self.as_tuple()
def as_ptr(self):
return self._row
def as_tuple(self):
precision = self._result.precision
field_count = self._result.field_count
blocks = [None] * field_count
fields = self._result.fields
field_lens = self._result.field_lengths()
for i in range(field_count):
data = ctypes.cast(self._row, ctypes.POINTER(ctypes.c_void_p))[i]
if fields[i].type not in CONVERT_FUNC:
raise DatabaseError("Invalid data type returned from database")
if data is None:
blocks[i] = None
else:
blocks[i] = CONVERT_FUNC[fields[i].type](data, 1, field_lens[i], precision)[0]
return tuple(blocks)
def as_dict(self):
values = self.as_tuple()
names = self._result.fields
dict(zip(names, values))
class TaosBlocks:
"""TDengine result blocks iterator"""
def __init__(self, result):
self._result = result
def __iter__(self):
return self
def __next__(self):
return self._result.fetch_block()
def next(self):
return self._result.fetch_block()
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class SmlPrecision:
"""Schemaless timestamp precision constants"""
NOT_CONFIGURED = 0 # C.TSDB_SML_TIMESTAMP_NOT_CONFIGURED
HOURS = 1
MINUTES = 2
SECONDS = 3
MILLI_SECONDS = 4
MICRO_SECONDS = 5
NANO_SECONDS = 6
class SmlProtocol:
"""Schemaless protocol constants"""
UNKNOWN_PROTOCOL = 0
LINE_PROTOCOL = 1
TELNET_PROTOCOL = 2
JSON_PROTOCOL = 3
\ No newline at end of file
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from taos.cinterface import *
from taos.error import *
from taos.result import *
class TaosStream(object):
"""TDengine Stream interface"""
def __init__(self, stream):
self._raw = stream
def as_ptr(self):
return self._raw
def close(self):
"""Close stmt."""
if self._raw is not None:
taos_close_stream(self._raw)
self._raw = None
def __del__(self):
self.close()
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from taos.result import TaosResult
from .cinterface import *
from .error import *
class TaosSubscription(object):
"""TDengine subscription object"""
def __init__(self, sub, with_callback = False):
self._sub = sub
self._with_callback = with_callback
def consume(self):
"""Consume rows of a subscription"""
if self._sub is None:
raise OperationalError("Invalid use of consume")
if self._with_callback:
raise OperationalError("DONOT use consume method in an subscription with callback")
result = taos_consume(self._sub)
return TaosResult(result)
def close(self, keepProgress=True):
"""Close the Subscription."""
if self._sub is None:
return False
taos_unsubscribe(self._sub, keepProgress)
self._sub = None
return True
def __del__(self):
self.close()
if __name__ == "__main__":
from .connection import TaosConnection
conn = TaosConnection(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):
data = sub.consume()
for d in data:
print(d)
sub.close()
conn.close()
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tests/comparisonTest/opentsdb/opentsdbtest/pom.xml
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...@@ -118,7 +118,7 @@ ...@@ -118,7 +118,7 @@
<dependency> <dependency>
<groupId>com.fasterxml.jackson.core</groupId> <groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId> <artifactId>jackson-databind</artifactId>
<version>2.10.0.pr1</version> <version>2.12.6.1</version>
</dependency> </dependency>
<dependency> <dependency>
......
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