GitHub user dongjoon-hyun opened a pull request: https://github.com/apache/spark/pull/11851
[SPARK-14029][SQL] Improve BooleanSimplification optimization by implementing `Not` canonicalization. ## What changes were proposed in this pull request? Currently, **BooleanSimplification** optimization can handle the following cases. * a && (!'a || 'b ) ==> 'a && 'b * a && ('b || !'a ) ==> 'a && 'b However, it can not handle the followings cases since those equations fails at the comparisons between their canonicalized forms. * a < 1 && (!('a < 1) || 'b) ==> ('a < 1) && 'b * a <= 1 && (!('a <= 1) || 'b) ==> ('a <= 1) && 'b * a > 1 && (!('a > 1) || 'b) ==> ('a > 1) && 'b * a >= 1 && (!('a >= 1) || 'b) ==> ('a >= 1) && 'b This PR implements the above cases and also the followings, too. * a < 1 && ('a >= 1 || 'b ) ==> ('a < 1) && 'b * a <= 1 && ('a > 1 || 'b ) ==> ('a <= 1) && 'b * a > 1 && (('a <= 1) || 'b) ==> ('a > 1) && 'b * a >= 1 && (('a < 1) || 'b) ==> ('a >= 1) && 'b ## How was this patch tested? Pass the Jenkins tests including new test cases in BooleanSimplicationSuite. You can merge this pull request into a Git repository by running: $ git pull https://github.com/dongjoon-hyun/spark SPARK-14029 Alternatively you can review and apply these changes as the patch at: https://github.com/apache/spark/pull/11851.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 #11851 ---- commit 6e63f8a918a1dc0d6e425a52150812e66d61f657 Author: Dongjoon Hyun <dongj...@apache.org> Date: 2016-03-20T10:29:05Z [SPARK-14029][SQL] Improve BooleanSimplification optimization by implementing `Not` canonicalization. ---- --- If your project is set up for it, you can reply to this email and have your reply appear on GitHub as well. If your project does not have this feature enabled and wishes so, or if the feature is enabled but not working, please contact infrastructure at infrastruct...@apache.org or file a JIRA ticket with INFRA. --- --------------------------------------------------------------------- To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org For additional commands, e-mail: reviews-h...@spark.apache.org