GitHub user dianfu opened a pull request:
https://github.com/apache/flink/pull/4936
[FLINK-7962] Add built-in support for min/max aggregation for Timestamp
## What is the purpose of the change
*This JIRA adds the built-in support for min/max aggregation for Timestamp.*
## Brief change log
- *Add TimestampMinAggFunction, TimestampMinWithRetractAggFunction,
TimestampMaxAggFunction and TimestampMaxWithRetractAggFunction*
- *Add TimestampOrdering*
## Verifying this change
This change added tests and can be verified as follows:
- *Added TimestampMaxAggFunctionTest,
TimestampMaxWithRetractAggFunctionTest, TimestampMinAggFunctionTest and
TimestampMinWithRetractAggFunctionTest*
## 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)
## 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/dianfu/flink timestamp_minmax
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/flink/pull/4936.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 #4936
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commit 8c69d1daae156852fc88b5d5ac20683a8979c353
Author: Dian Fu <[email protected]>
Date: 2017-11-02T03:26:25Z
[FLINK-7962] Add built-in support for min/max aggregation for Timestamp
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