GitHub user mgaido91 opened a pull request: https://github.com/apache/spark/pull/19870
[SPARK-22665][SQL] Avoid repartitioning with empty list of expressions ## What changes were proposed in this pull request? Repartitioning by empty set of expressions is currently possible, even though it is a case which is not handled properly. Indeed, in `HashExpression` there is a check to avoid to run it on an empty set, but this check is not performed while repartitioning. Thus, the PR adds a check to avoid this wrong situation. ## How was this patch tested? added UT You can merge this pull request into a Git repository by running: $ git pull https://github.com/mgaido91/spark SPARK-22665 Alternatively you can review and apply these changes as the patch at: https://github.com/apache/spark/pull/19870.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 #19870 ---- commit fdf10b36cbc746e57cb0b8c2f79646db9dd06964 Author: Marco Gaido <marcogaid...@gmail.com> Date: 2017-12-03T19:40:01Z [SPARK-22665][SQL] Avoid repartitioning with empty list of expressions ---- --- --------------------------------------------------------------------- To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org For additional commands, e-mail: reviews-h...@spark.apache.org