deadwind4 opened a new pull request #18469:
URL: https://github.com/apache/flink/pull/18469
## What is the purpose of the change
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'
## Brief change log
- *Added a method appendUrlSuffix in MySQLDialect to append
'rewriteBatchedStatements=true'.*
- *Added appendUrlSuffix default method in JdbcDialect interface to do
nothing.*
- *use appendUrlSuffix in JdbcConnectionOptions#Builder#build() method*
## Verifying this change
*(example:)*
- *Added a test case in MySqlDialect to test appendUrlSuffix*
## Does this pull request potentially affect one of the following parts:
- Dependencies (does it add or upgrade a dependency): (no)
- The public API, i.e., is any changed class annotated with
`@Public(Evolving)`: (yes)
- The serializers: (no)
- The runtime per-record code paths (performance sensitive): (no)
- Anything that affects deployment or recovery: JobManager (and its
components), Checkpointing, Kubernetes/Yarn, ZooKeeper: (no)
- The S3 file system connector: (no)
## Documentation
- Does this pull request introduce a new feature? (no)
- If yes, how is the feature documented? (not documented)
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