GitHub user lianhuiwang opened a pull request:
https://github.com/apache/spark/pull/6875
[SPARK-8160][SQL]Support using external sorting to run aggregate
add config 'spark.sql.planner.sortMergeAggregate' to turn on sortMerge
Aggregate, now default is false. and add two class to support
sortMergeAggregate:
SortMergeAggregate is for Aggregate that cannot be codegened.
SortMergeGeneratedAggregate is for GeneratedAggregate that can be codegened.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/lianhuiwang/spark sortMerge-aggregate
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/6875.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 #6875
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commit 674b66c9565fad85243fcba3dc2b99d99e933a45
Author: Lianhui Wang <[email protected]>
Date: 2015-06-18T06:57:01Z
add sortmerge-aggregate
commit daab5ba45fda341c9ad4ce76f7d64f77e8962041
Author: Lianhui Wang <[email protected]>
Date: 2015-06-18T07:48:33Z
rm unused file
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