GitHub user greghogan opened a pull request:
https://github.com/apache/flink/pull/2272
[FLINK-4231] [java] Switch DistinctOperator from GroupReduce to Reduce
Rewrite the DistinctOperator using Reduce to support both the sort-based
combine and the recently added hash-based combine. This is configured by the
new method DistinctOperator.setCombineHint(CombineHint).
The tests for combineability are removed as Reduce is inherently
combineable.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/greghogan/flink
4231_switch_distinctoperator_from_groupreducefunction_to_reducefunction
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/flink/pull/2272.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 #2272
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commit 2405f827d672d669ab0d5cc8d5963928b13511be
Author: Greg Hogan <[email protected]>
Date: 2016-07-18T15:50:44Z
[FLINK-4231] [java] Switch DistinctOperator from GroupReduce to Reduce
Rewrite the DistinctOperator using Reduce to support both the sort-based
combine and the recently added hash-based combine. This is configured by
the new method DistinctOperator.setCombineHint(CombineHint).
The tests for combineability are removed as Reduce is inherently
combineable.
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