GitHub user twalthr opened a pull request:
https://github.com/apache/flink/pull/5019
[FLINK-7942] [table] Reduce aliasing in RexNodes
## What is the purpose of the change
This PR reduces the number of `AS` expressions in projects. This fixes the
bug mentioned in FLINK-7942 with the `FilterJoinRule` and improves the plans.
Many calc operations are not needed anymore. For multi-windows, the change
caused some problems that are not trivial to fix, so they still use aliasing
for resolving time attributes.
## Brief change log
- Remove explicit alias expression from RexNodes
## Verifying this change
- Added testFilterJoinRule in JoinTest.
## 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? not applicable
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/twalthr/flink FLINK-7942
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/flink/pull/5019.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 #5019
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commit 82356f22154c563fcd8bd018dd954fe274e7fe5f
Author: twalthr <[email protected]>
Date: 2017-11-15T11:07:16Z
[FLINK-7942] [table] Reduce aliasing in RexNodes
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