GitHub user tejasapatil opened a pull request: https://github.com/apache/spark/pull/14841
[SPARK-17271] [SQL] Planner adds un-necessary Sort even if child ordering is semantically same as required ordering ## What changes were proposed in this pull request? Jira : https://issues.apache.org/jira/browse/SPARK-17271 This PR includes following changes: - Added a `semanticEquals` method to `SortOrder` so that it can compare underlying child expressions semantically (and not using default Object.equals) - Fixed `EnsureRequirements` to use semantic comparison of SortOrder ## How was this patch tested? - Added a test case to `PlannerSuite`. Ran rest tests in `PlannerSuite` You can merge this pull request into a Git repository by running: $ git pull https://github.com/tejasapatil/spark SPARK-17271_sort_order_equals_bug Alternatively you can review and apply these changes as the patch at: https://github.com/apache/spark/pull/14841.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 #14841 ---- commit 7192418b3a26a14642fc04fc92bf496a954ffa5d Author: Tejas Patil <tej...@fb.com> Date: 2016-08-27T02:59:28Z [SPARK-17271] [SQL] Planner adds un-necessary Sort even if child ordering is semantically same as required ordering ---- --- 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