presto搭建mysql | 易学教程

root@cdh soft]# cd presto-server-0.216/
[root@cdh presto-server-0.216]# ls
bin lib NOTICE plugin README.txt
mkdir data && mkdir etc

[root@cdh etc]# vi config.properties
coordinator=true
node-scheduler.include-coordinator=true
http-server.http.port=34445
query.max-memory=1GB
query.max-memory-per-node=1GB
query.max-total-memory-per-node=1GB
discovery-server.enabled=true
discovery.uri=http://127.0.0.1:34445

[root@cdh etc]# vi node.properties
node.environment=production
node.id=prestomaster
node.data-dir=/root/soft/presto-server-0.212/data

[root@cdh etc]# vi jvm.config
-server
-Xmx16G
-XX:+UseConcMarkSweepGC
-XX:+ExplicitGCInvokesConcurrent
-XX:+CMSClassUnloadingEnabled
-XX:+AggressiveOpts
-XX:+HeapDumpOnOutOfMemoryError
-XX:OnOutOfMemoryError=kill -9 %p
-XX:ReservedCodeCacheSize=150M
[root@cdh presto-server-0.216]# vi log.properties
com.facebook.presto=INFO #server日志级别

如果需要从节点
2.2.4从节点配置
从节点配置只需要将主节点的config.properties、node.properties修改即可
config.properties

coordinator=false
http-server.http.port=9000
query.max-memory=20GB
query.max-memory-per-node=10GB
query.max-total-memory-per-node=10GB
discovery.uri=http://ip:9000

node.properties
node.environment=presto_test
node.id=persto02
node.data-dir=/opt/soft/presto-server-0.223/data

[root@cdh etc]# mkdir catalog
[root@cdh etc]# vim mysql.properties
[root@cdh presto-server-0.216]# cd etc
onnector.name=mysql
connection-url=jdbc:mysql://111.231.:3306/
connection-user=r
connection-password=SF

package com.paohaijiao.mybatis;


import com.Application;
import com.gather.common.constants.Constant;
import com.gather.common.util.MD5andKL;
import com.gather.general.bean.SysUser;
import com.gather.general.bean.UserDto;
import com.gather.general.mapper.SysUserMapper;
import com.gather.general.mapper.UserMapper;
import com.gather.general.service.UserService;
import com.gather.general.service.VerifyCodeService;
import org.apache.commons.codec.digest.Md5Crypt;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;
import java.util.List;

@RunWith(SpringRunner.class)
@SpringBootTest(classes = Application.class)
public class MybatisApplicationTests {
    @Autowired
    private VerifyCodeService verifyCodeService;
    @Autowired
    private UserService userService;
    @Autowired
    private UserMapper userMapper;

    @Test
    public void contextLoads()throws Exception {

        Class.forName("com.facebook.presto.jdbc.PrestoDriver");
        Connection connection = DriverManager.getConnection("jdbc:presto://cdh:34445/mysql/gaoxin","root",null);  ;
        Statement stmt = connection.createStatement();
        ResultSet rs = stmt.executeQuery("show tables");
        while (rs.next()) {
            System.out.println(rs.getString(1));
        }
        rs.close();
        connection.close();



    }

}

<dependency>
   <groupId>com.facebook.presto</groupId>
   <artifactId>presto-jdbc</artifactId>
   <version>0.100</version>
</dependency>

SHOW TABLES FROM postgresql.public;

mybatis必须加statementType="STATEMENT"才能使用

<select id="selectUserList" resultType="com.gather.general.bean.UserDto" parameterType="com.gather.general.bean.UserDto" statementType="STATEMENT">
    select
    b.id as id
    from user b
</select>

PostgresSqlDataSourceMeta meta = new PostgresSqlDataSourceMeta();
meta.setUrl("jdbc:presto://cdh:34445/system/runtime");
meta.setUsername("root");
meta.setDriverClass("com.facebook.presto.jdbc.PrestoDriver");//driver-class-name
return meta;

<select id="selectUserList" resultType="com.gather.general.bean.UserDto" parameterType="com.gather.general.bean.UserDto" statementType="STATEMENT">
 select b.id as id, c.description as remark ,b.user_name as userName  from postgresql.public.r_user c left join mysql.gaoxin.user b on b.id=c.id_user

</select>

转换string ->description

<select id="selectUserList" resultType="java.util.HashMap"  statementType="STATEMENT">
 select b.id as id, c.id_user as isChengdu, cast(c.description AS varchar)  as description   from postgresql.public.r_user c left join mysql.gaoxin.user b on b.id=c.id_user

</select>

来源：oschina

链接：https://my.oschina.net/goudingcheng/blog/3165263

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presto

mysql

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cdh