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postgresqlSink.md

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1.格式:

CREATE TABLE tableName(
    colName colType,
    ...
    colNameX colType,
    primary key (colName)
 )WITH(
    type ='postgresql',
    url ='jdbcUrl',
    userName ='userName',
    password ='pwd',
    tableName ='tableName',
    parallelism ='parllNum'
 );

2.支持版本

postgresql-9.5+

3.表结构定义

参数名称 含义
tableName 在 sql 中使用的名称;即注册到flink-table-env上的名称
colName 列名称
colType 列类型 colType支持的类型
primary key updateMode为UPSERT时,需要指定的主键信息

4.参数:

参数名称 含义 是否必填 默认值
type 结果表插件类型,必须为postgresql
url 连接postgresql数据库 jdbcUrl
userName postgresql连接用户名
password postgresql连接密码
tableName postgresql表名称
schema postgresql表空间
parallelism 并行度设置 1
batchSize flush的大小 100
batchWaitInterval flush的时间间隔,单位ms 1000
allReplace true:新值替换旧值 false
updateMode APPEND:不回撤数据,只下发增量数据,UPSERT:先删除回撤数据,然后更新 结果表设置主键则为UPSERT

5.样例:

回溯流删除


CREATE TABLE source1 (
    id int,
    name VARCHAR
)WITH(
    type ='kafka11',
    bootstrapServers ='172.16.8.107:9092',
    zookeeperQuorum ='172.16.8.107:2181/kafka',
    offsetReset ='latest',
    topic ='mqTest03',
    timezone='Asia/Shanghai',
    topicIsPattern ='false'
 );



CREATE TABLE source2(
    id int,
    address VARCHAR
)WITH(
    type ='kafka11',
    bootstrapServers ='172.16.8.107:9092',
    zookeeperQuorum ='172.16.8.107:2181/kafka',
    offsetReset ='latest',
    topic ='mqTest04',
    timezone='Asia/Shanghai',
    topicIsPattern ='false'
);


CREATE TABLE MyResult(
    id int,
    name VARCHAR,
    address VARCHAR,
    primary key (id)
)WITH(
    type='postgresql',
    url='jdbc:postgresql://172.16.8.193:5432/DTstack',
    userName='root',
    password='123456',
    tableName='userInfo',
    schema = 'aaa',
    updateMode = 'upsert',
    batchSize = '1'
);

insert into MyResult
select 
	s1.id,
	s1.name,
	s2.address
from 
	source1 s1
left join
	source2 s2
on 	
	s1.id = s2.id



数据结果:

向Topic mqTest03 发送数据 {"name":"maqi","id":1001} 插入 (1001,"maqi",null)

向Topic mqTest04 发送数据 {"address":"hz","id":1001} 删除 (1001,"maqi",null) 插入 (1001,"maqi","hz")