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https://issues.apache.org/jira/browse/FLINK-7986?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16240466#comment-16240466
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ASF GitHub Bot commented on FLINK-7986:
---------------------------------------
GitHub user Xpray opened a pull request:
https://github.com/apache/flink/pull/4956
[FLINK-7986][TableAPI & SQL] Introduce FilterSetOpTransposeRule to Flink
## What is the purpose of the change
Introduce FilterSetOpTransposeRule to Flink
## Brief change log
add `FilterSetOpTransposeRule.INSTANCE` to `FlinkRuleSets`
## Verifying this change
This change is already covered by existing tests, such as
*(org.apache.flink.table.api.stream.table.SetOpTransposeTest)*.
## 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
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/Xpray/flink FLINK-7986
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/flink/pull/4956.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 #4956
----
commit be50be94109ca63ce0587f10ab5479978231237b
Author: Xpray <leonxp...@gmail.com>
Date: 2017-11-06T15:47:33Z
[FLINK-7986][TableAPI & SQL] Introduce FilterSetOpTransposeRule to Flink
----
> Introduce FilterSetOpTransposeRule to Flink
> -------------------------------------------
>
> Key: FLINK-7986
> URL: https://issues.apache.org/jira/browse/FLINK-7986
> Project: Flink
> Issue Type: Improvement
> Reporter: Ruidong Li
> Assignee: Ruidong Li
> Priority: Trivial
>
> A.unionAll(B).where.groupBy.select
> =>
> A.where.unionAll(B.where).groupBy.select
> this rule will reduce networkIO
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