GitHub user sameeragarwal opened a pull request:
https://github.com/apache/spark/pull/11670
[SPARK-XXXX][SQL] Remove redundant conditions while combining filters
## What changes were proposed in this pull request?
**[I'll link it to the JIRA once ASF JIRA is back online]**
This PR modifies the existing `CombineFilters` rule to remove redundant
conditions while combining individual filter predicates. For instance, queries
of the form `table.where('a === 1 && 'b === 1).where('a === 1 && 'c === 1)`
will now be equivalent to ` table.where('a === 1 && 'b === 1 && 'c === 1)`
(instead of ` table.where('a === 1 && 'a === 1 && 'b === 1 && 'c === 1)`)
## How was this patch tested?
Unit test in `FilterPushdownSuite`
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/sameeragarwal/spark combine-filters
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/11670.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 #11670
----
commit c78166de38f48b11f8e3dc328c95f80451206f7c
Author: Sameer Agarwal <[email protected]>
Date: 2016-03-12T00:25:35Z
Remove redundant conditions while combining filters
commit e946c1ef3aac0ae251fc47a4a07c023cfd8774b7
Author: Sameer Agarwal <[email protected]>
Date: 2016-03-12T00:40:56Z
unit tests
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