lsyldliu opened a new pull request, #21629:
URL: https://github.com/apache/flink/pull/21629
## What is the purpose of the change
*Introducing query-level configurable options
`table.exec.hive.native-agg-function.enabled` to support enable native hive
aggregate function, native implementation use hash-agg strategy that can
improve the aggregate performance. However, due to flink current ability, we
can't assign the native agg function behavior with hive udaf, so if the
performance isn't important, you shouldn't enable this option.*
## Brief change log
- *Introducing query-level configurable options
`table.exec.hive.native-agg-function.enabled` to support enable native hive
aggregate function*
## Verifying this change
This change added tests and can be verified as follows:
- *Added integration tests in HiveDialectAggITCase*
## Does this pull request potentially affect one of the following parts:
- Dependencies (does it add or upgrade a dependency): (yes /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): (yes)
- Anything that affects deployment or recovery: JobManager (and its
components), Checkpointing, Kubernetes/Yarn, ZooKeeper: (no)
- The S3 file system connector: (don't know)
## Documentation
- Does this pull request introduce a new feature? (yes)
- If yes, how is the feature documented? (JavaDocs)
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