GitHub user ravipesala opened a pull request:
https://github.com/apache/incubator-carbondata/pull/666
[CARBONDATA-530] Keep the CarbonDecoder on top of limit in case of
limit+sort plan
There is a new optimization in spark2.1, it can group limit and sort
together and get the topN efficiently. so we should put outer decoder above
limit to make use of this optimization.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/ravipesala/incubator-carbondata limitplan-push
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/incubator-carbondata/pull/666.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 #666
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commit efc6887306db0eb555607fdcce5c13b9249691cc
Author: ravipesala <ravi.pes...@gmail.com>
Date: 2017-03-16T19:18:26Z
Modified optimizer to place decoder on top of limit in case of sort and
limit.
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