GitHub user yjshen opened a pull request:
https://github.com/apache/spark/pull/8049
[SPARK-9182][SQL]Filters are not passed through to jdbc source
This PR fixes unable to push filter down to JDBC source caused by `Cast`
during pattern matching.
While we are comparing columns of different type, there's a big chance we
need a cast on the column, therefore not match the pattern directly on
Attribute and would fail to push down.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/yjshen/spark jdbc_pushdown
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/8049.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 #8049
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commit 890e66cd20cf22f4ad6ed09391511f0c56420a00
Author: Yijie Shen <[email protected]>
Date: 2015-08-08T07:49:43Z
eliminate cast on attribute to enable filter push down
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