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From jianqiao <...@git.apache.org>
Subject [GitHub] incubator-quickstep pull request #192: Use partitioned aggregation for singl...
Date Fri, 24 Feb 2017 16:55:55 GMT
GitHub user jianqiao opened a pull request:


    Use partitioned aggregation for single-function DISTINCT aggregation.

    This PR uses the partitioned aggregation routine for parallelizing DISTINCT aggregation.
It improves the performance of TPC-H Q16 from ~10s to ~2s with scale factor 100 on CloudLab

You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/apache/incubator-quickstep parallel-distinct-agg

Alternatively you can review and apply these changes as the patch at:


To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #192
commit 02540063f423c9fbfd06e5b7f8b3192dc3e009db
Author: Jianqiao Zhu <jianqiao@cs.wisc.edu>
Date:   2017-02-21T02:05:08Z

    Use partitioned aggregation for single-function DISTINCT aggregation.


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