文章目录
- 一. Trino CLI
- 1. 安装client
- 2. 使用client执行sql
- 二. JDBC driver 连接Trino
- 1. 通过DBeaver用户界面连接
- 2. JDBC Driver in java
- 2.1. 环境配置
- 2.2. 注册和配置driver
- 2.3. 连接参数
- 2.4. 查询例子
一. Trino CLI
1. 安装client
Trino CLI提供了一个基于终端的交互式shell。你可以通过它运行查询并与Trino服务端交互来检查其元数据。
下载地址:trino-cli-434-executable.jar
# 下载 wget -O trino https://repo1.maven.org/maven2/io/trino/trino-cli/434/trino-cli-434-executable.jar# 添加可执行权限、并将其添加到PATH下,方便使用chmod +x trinomv trino ~/binexport PATH=~/bin/:$PATH
2. 使用client执行sql
./trino http://trino.example.com:8080# 帮助文档trino> helpSupported commands:QUITEXITCLEAREXPLAIN [ ( option [, ...] ) ] <query>options: FORMAT { TEXT | GRAPHVIZ | JSON }TYPE { LOGICAL | DISTRIBUTED | VALIDATE | IO }DESCRIBE <table>SHOW COLUMNS FROM <table>SHOW FUNCTIONSSHOW CATALOGS [LIKE <pattern>]SHOW SCHEMAS [FROM <catalog>] [LIKE <pattern>]SHOW TABLES [FROM <schema>] [LIKE <pattern>]USE [<catalog>.]<schema>
运行sql
trino> select *from "mysql-1".flinkx_test.flinkx_hdfs_log-> ;id| ip| stamp | url| refer | useragent | pid| uid| mid| insert_time | create_time | create_date------+-----------------+-------+------+-------+-----------+----------+------+------+---------------------+-------------+-------------1 | NULL| NULL| NULL | aaaa| NULL| 20221212 | NULL | NULL | 2023-01-31 16:32:09 | NULL| 2023-01-111 | NULL| NULL| NULL | aaaa| NULL| 20221212 | NULL | NULL | 2023-01-31 18:37:20 | NULL| 2023-01-11...(18 rows)Query 20231206_032803_00000_78prf, FINISHED, 1 nodeSplits: 1 total, 1 done (100.00%)0.67 [18 rows, 0B] [26 rows/s, 0B/s]
连接trino时可以设置默认的catalog(某个连接实例)和schema(数据库),这样可以直接查询表。
./trino http://localhost:8080/mysql-1/flinkx_testtrino:flinkx_test> show tables;Table----------------------------------------------------- aaa aaa_csv111_1 aaa_csv111_2 ...
USE默认的catalog和schema,直接查询此库下的表
trino> USE tpch.tiny;USEtrino:tiny>
debug功能
./trino http://localhost:8080/mysql-1/flinkx_test --debug trino:flinkx_test> select *from "mysql-1".flinkx_test.flinkx_hdfs_log-> ;id| ip| stamp | url| refer | useragent | pid| uid| mid| insert_time | create_time | create_date------+-----------------+-------+------+-------+-----------+----------+------+------+---------------------+-------------+-------------1 | NULL| NULL| NULL | aaaa| NULL| 20221212 | NULL | NULL | 2023-01-31 16:32:09 | NULL| 2023-01-111 | NULL| NULL| NULL | aaaa| NULL| 20221212 | NULL | NULL | 2023-01-31 18:37:20 | NULL| 2023-01-11...http://localhost:8080/ui/query.html?20231206_033726_00007_78prfSplits: 1 total, 1 done (100.00%)CPU Time: 0.0s total,3K rows/s, 0B/s, 4% activePer Node: 0.0 parallelism,30 rows/s, 0B/sParallelism: 0.0Peak Memory: 64B0.60 [18 rows, 0B] [30 rows/s, 0B/s]
--execute选项
./trino http://localhost:8080/mysql-1/flinkx_test --execute 'select *from "mysql-1".flinkx_test.flinkx_hdfs_log limit 3;' "1","","","","aaaa","","20221212","","","2023-01-31 16:32:09","","2023-01-11""1","","","","aaaa","","20221212","","","2023-01-31 18:37:20","","2023-01-11""","124.239.193.194","","","","","h_home","","","2023-02-10 10:52:01","",""
避免使用完全限定符
# 使用`--catalog`和`--schema`选项来./trino http://localhost:8080 --catalog "mysql-1" --schema flinkx_test \--execute 'select *from flinkx_hdfs_log limit 3;'# 通过http设限定符./trino http://localhost:8080/mysql-1/flinkx_test\--execute 'select *from flinkx_hdfs_log limit 3;'
执行多个sql
trino http://localhost:8080\--execute 'use "mysql-1".flinkx_test;select *from flinkx_hdfs_log limit 3;'
执行sql文件
vim trino.sqluse "mysql-1".flinkx_test;select *from flinkx_hdfs_log limit 3;./trino http://localhost:8080-f trino.sql
输出格式
Trino CLI提供了
--output-format
选项来控制如何在非交互模式下显示输出,可用的选项有ALIGNED、VERTICAL、TSV、TSV_HEADER、CSV、CSV_HEADER、CSV_UNQUOTED、CSV_HEADER_UNQUOTED、JSON和NULL,默认值是CSV。
忽略错误
Trino CLI提供了
--ignore-error
选项来忽略执行文件中的查询时遇到的任何错误。默认行为是在遇到第一个错误时终止执行脚本。
二. JDBC driver 连接Trino
任何Java应用程序都可以通过Java数据库连接(JDBC)驱动连接到Trino。通过JDBC驱动,所有这些应用程序都可以使用Trino。
Trino的JDBC驱动允许你连接到Trino并使用SQL语句与Trino交互。
如果你熟悉JDBC驱动的不同实现,就知道Trino的JDBC驱动是Type 4驱动,这仅仅意味着它直接与Trino原生协议通信。
1. 通过DBeaver用户界面连接
查看表时出现如下错误:
需要声明用户,默认输入admin、密码为空
重新连接可以看到注册的catalog了
可以像之前使用DBeaver查看表了。
2. JDBC Driver in java
2.1. 环境配置
需要java 8 或更高
所有通过JDBC连接Trino的用户,必须在system.jdbc
schema中赋予权限
maven依赖:
<dependency><groupId>io.trino</groupId><artifactId>trino-jdbc</artifactId><version>434</version></dependency>
其他版本地址在:
A list of all available versions can be found in the Maven Central Repository.
客户端使用http协议和 Trino client REST API 和Trino进行通讯。
2.2. 注册和配置driver
JDBC URL支持的格式:
jdbc:trino://host:portjdbc:trino://host:port/catalogjdbc:trino://host:port/catalog/schema
举例:
jdbc:trino://example.net:8080/hive/sales
连接example.net上的trino(8080端口),并明确了catalog和schema。
如果trino的驱动识别不到,则可以显式声明:
io.trino.jdbc.TrinoDriver
。
2.3. 连接参数
声明方式有如下两种
// propertiesString url = "jdbc:trino://example.net:8080/hive/sales";Properties properties = new Properties();properties.setProperty("user", "test");properties.setProperty("password", "secret");properties.setProperty("SSL", "true");Connection connection = DriverManager.getConnection(url, properties);// URL parametersString url = "jdbc:trino://example.net:8443/hive/sales" />;Connection connection = DriverManager.getConnection(url);
当然这两种方式我们可以混用,有些参数通过properties设置,有些在url中设置。
完整的参数见:Parameter reference
2.4. 查询例子
package com.gao;import java.sql.*;public class TrinoQueryExample {public static void main(String[] args) {// Trino数据库连接信息String trinoUrl = "jdbc:trino://xxx:8080";String trinoUser = "admin";String trinoPassword = "";// SQL查询语句String sqlQuery = "select *from\"mysql-1\".flinkx_test.flinkx_hdfs_log limit 3";try {Class.forName("io.trino.jdbc.TrinoDriver");// 建立Trino数据库连接Connection connection = DriverManager.getConnection(trinoUrl, trinoUser, trinoPassword);// 创建Statement对象Statement statement = connection.createStatement();// 执行查询ResultSet resultSet = statement.executeQuery(sqlQuery);// 处理查询结果while (resultSet.next()) {// 根据查询结果的列名或索引获取数据Integer id = resultSet.getInt("id");Timestamp create_time = resultSet.getTimestamp("create_time");// 处理获取的数据System.out.println("id: " + id + ", create_time: " + create_time);}// 关闭资源resultSet.close();statement.close();connection.close();} catch (SQLException e) {e.printStackTrace();} catch (ClassNotFoundException e) {throw new RuntimeException(e);}}}id: 1, create_time: nullid: 1, create_time: nullid: 0, create_time: null
参考:
《trino权威指南:原书第二版》
trino官网:https://trino.io/docs/current/client.html