GitHub user sounakr opened a pull request:
https://github.com/apache/incubator-carbondata/pull/805
[WIP] Cast Push Down Optimization
Problem : With Filter Expression with Casts, PushDown to Carbon layer was
not happening.
Analysis : Cast Expressions are handled in Spark. So Whenever Cast
Expressions are present in the Filter predicates then Carbon Scan all its data
and move it to spark for evaluation. This makes the query processing slow.
Fix : Handle Cast Expression in Carbon Layer. As of now it is handled in
Spark -2.1
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/sounakr/incubator-carbondata casts
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/incubator-carbondata/pull/805.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 #805
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commit 2c65a98b5c181f144f3d9ff1033d01bbb604e567
Author: sounakr <[email protected]>
Date: 2017-04-04T09:46:46Z
Cast Push Down Optimization
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