GitHub user lionelcao opened a pull request:
https://github.com/apache/incubator-carbondata/pull/716
[CARBONDATA-840][WIP] improve limit query performance [Group By]
Currently limit query will still scan all data first and limit in the last
step. In carbon we can convert limit to filters with dictionary distinct value
list...
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/lionelcao/incubator-carbondata carbon_dev
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/incubator-carbondata/pull/716.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 #716
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commit e023c36c5f31efa63daf7c2e8f5fec8fa3c19c7e
Author: lucao <[email protected]>
Date: 2017-03-31T06:19:40Z
[WIP]improve limit query performance
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