GitHub user hvanhovell opened a pull request: https://github.com/apache/spark/pull/16821
[SPARK-19472][SQL] Parser should mistake CASE WHEN(...) for a function call ## What changes were proposed in this pull request? The SQL parser can mistake a `WHEN (...)` used in `CASE` for a function call. This happens in cases like the following: ```sql select case when (1) + case when 1 > 0 then 1 else 0 end = 2 then 1 else 0 end from tb ``` This PR fixes this by re-organizing the case related parsing rules. ## How was this patch tested? Added a regression test to the `ExpressionParserSuite`. You can merge this pull request into a Git repository by running: $ git pull https://github.com/hvanhovell/spark SPARK-19472 Alternatively you can review and apply these changes as the patch at: https://github.com/apache/spark/pull/16821.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 #16821 ---- commit 870f29820b704c4ee73bb07e12db187a923a15e2 Author: Herman van Hovell <hvanhov...@databricks.com> Date: 2017-02-06T15:03:23Z Do not mistake CASE WHEN(...) for a function call. ---- --- 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