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https://issues.apache.org/jira/browse/FLINK-25485?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ada Wong updated FLINK-25485:
-----------------------------
    Description: 
When we directly use buffer-flush options of the mysql sink 
(sink.buffer-flush.max-rows and sink.buffer-flush.interval) can not increase 
throughput.

We must set 'rewriteBatchedStatements=true' into mysql jdbc url, for 
'sink.buffer-flush' to take effect.

Such as: jdbc:mysql://ip:3306/dbname?rewriteBatchedStatements=true 

I want add a method appendUrlSuffix in MySQLDialect to auto set this jdbc 
option.

Many users forget or don't know this option.

Inspired by alibaba DataX.

[https://github.com/alibaba/DataX/blob/master/plugin-rdbms-util/src/main/java/com/alibaba/datax/plugin/rdbms/util/DataBaseType.java]

  was:
When we directly use buffer-flush options of the mysql sink 
(sink.buffer-flush.max-rows and sink.buffer-flush.interval) can not increase 
throughput.

We must set 'rewriteBatchedStatements=true' into mysql jdbc url, for 
'sink.buffer-flush' to take effect.

I want add a method appendUrlSuffix in MySQLDialect to auto set this jdbc 
option.

Many users forget or don't know this option.

Inspired by alibaba DataX.

[https://github.com/alibaba/DataX/blob/master/plugin-rdbms-util/src/main/java/com/alibaba/datax/plugin/rdbms/util/DataBaseType.java]


> JDBC connector implicitly append url options when use mysql
> -----------------------------------------------------------
>
>                 Key: FLINK-25485
>                 URL: https://issues.apache.org/jira/browse/FLINK-25485
>             Project: Flink
>          Issue Type: Improvement
>          Components: Connectors / JDBC
>    Affects Versions: 1.14.2
>            Reporter: Ada Wong
>            Priority: Major
>
> When we directly use buffer-flush options of the mysql sink 
> (sink.buffer-flush.max-rows and sink.buffer-flush.interval) can not increase 
> throughput.
> We must set 'rewriteBatchedStatements=true' into mysql jdbc url, for 
> 'sink.buffer-flush' to take effect.
> Such as: jdbc:mysql://ip:3306/dbname?rewriteBatchedStatements=true 
> I want add a method appendUrlSuffix in MySQLDialect to auto set this jdbc 
> option.
> Many users forget or don't know this option.
> Inspired by alibaba DataX.
> [https://github.com/alibaba/DataX/blob/master/plugin-rdbms-util/src/main/java/com/alibaba/datax/plugin/rdbms/util/DataBaseType.java]



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