GitHub user docete opened a pull request:
https://github.com/apache/flink/pull/3111
[FLINK-3475] [Table] DISTINCT aggregate function support for SQL queries
Copy calcite's AggregateExpandDistinctAggregatesRule to Flink project, and
do a quick fix to avoid some bad case mentioned in CALCITE-1558. This rule let
Flink support distinct aggregate functions.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/docete/flink master
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/flink/pull/3111.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 #3111
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commit dc417f27d3d2f3644de7b8873577c5ed6d93230e
Author: Zhenghua Gao <doc...@gmail.com>
Date: 2017-01-12T02:33:27Z
[FLINK-3475] DISTINCT aggregate function support for SQL queries
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