GitHub user maryannxue opened a pull request:

    https://github.com/apache/spark/pull/20816

    SPARK-21479 Outer join filter pushdown in null supplying table when 
condition is on one of the joined columns

    ## What changes were proposed in this pull request?
    
    Added `TransitPredicateInOuterJoin` optimization rule that transits 
constraints from the preserved side of an outer join to the null-supplying 
side. The constraints of the join operator will remain unchanged.
    
    ## How was this patch tested?
    
    Added 3 tests in `InferFiltersFromConstraintsSuite`.


You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/maryannxue/spark spark-21479

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/spark/pull/20816.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 #20816
    
----
commit ac17976fd2b024039ee6cd848b864d2d052ec573
Author: maryannxue <maryann.xue@...>
Date:   2018-03-13T21:05:37Z

    SPARK-21479 Outer join filter pushdown in null supplying table when 
condition is on one of the joined columns

----


---

---------------------------------------------------------------------
To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org
For additional commands, e-mail: reviews-h...@spark.apache.org

Reply via email to