GitHub user fhueske opened a pull request:
https://github.com/apache/flink/pull/6393
[FLINK-9296] [table] Add support for non-windowed DISTINCT aggregates.
## What is the purpose of the change
- Fix a regression from 1.5 that was caused by rearranging optimization
rules.
- Add tests to ensure the feature won't be broken again.
## Brief change log
- Remove DISTINCT limitation on `DataStreamAggregateRule`.
- Add plan test to ensure queries are correctly translated
- Add ITCase to ensure queries are correctly executed
- Remove outdated limitation from documentation
## Verifying this change
- Run the added tests
## 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: **no**
- The runtime per-record code paths (performance sensitive): **no**
- Anything that affects deployment or recovery: JobManager (and its
components), Checkpointing, Yarn/Mesos, 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? **n/a**
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/fhueske/flink table-distinctGroupBy
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/flink/pull/6393.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #6393
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