ranqiqiang opened a new pull request #18457:
URL: https://github.com/apache/flink/pull/18457
## **What is the purpose of the change**
JdbcTableSource supports jdbc async look up join
## **Brief change log**
1.add class JdbcRowDataAsyncLookupFunction
2.add class JdbcConnectionPoolManager,manager connection entry
3.add class JdbcConnectionEntry
4.modify JdbcConnectorOptions, add async/async.parallelism options
5.modify JdbcDynamicTableFactory, add async options
6.modify JdbcDynamicTableSource, add asyncFunction provider
## **Verifying this change**
This change added tests and can be verified as follows:
1.JdbcDynamicTableFactoryTest#testJdbcAsyncLookupProvider
## 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)`: (no)
- The serializers: (don't know)
- The runtime per-record code paths (performance sensitive): (don't know)
- 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? (yes)
- If yes, how is the feature documented? ( docs / JavaDocs )
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