GitHub user spanchamiamapr opened a pull request:
https://github.com/apache/drill/pull/678
DRILL-5065 - Optimize count( * ) queries on MapR-DB JSON Tables
In MapR-DB v5.2.0, we enabled '_id' only projection for JSON tables.
Hence, we can now optimize the following queries:
a. count(*) by projecting only the '_id' column.
b. '_id' only projections, including count(_id)
Change the format plugin config parameter name.
Fix setter of config parameter `disableCountOptimization` for drill-maprdb
plugin
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/spanchamiamapr/drill drill-5065-fix
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/drill/pull/678.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 #678
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commit 0ebaad1c85095443db03a7d6f1c9a774fd99c60b
Author: Smidth Panchamia <[email protected]>
Date: 2016-11-28T21:59:34Z
DRILL-5065 - Optimize count( * ) queries on MapR-DB JSON Tables
In MapR-DB v5.2.0, we enabled '_id' only projection for JSON tables.
Hence, we can now optimize the following queries:
a. count(*) by projecting only the '_id' column.
b. '_id' only projections, including count(_id)
Change the format plugin config parameter name.
Fix setter of config parameter `disableCountOptimization` for drill-maprdb
plugin
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