[ https://issues.apache.org/jira/browse/SPARK-32241?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Wenchen Fan resolved SPARK-32241. --------------------------------- Fix Version/s: 3.1.0 Resolution: Fixed Issue resolved by pull request 29053 [https://github.com/apache/spark/pull/29053] > Remove empty children of union > ------------------------------ > > Key: SPARK-32241 > URL: https://issues.apache.org/jira/browse/SPARK-32241 > Project: Spark > Issue Type: Improvement > Components: SQL > Affects Versions: 3.1.0 > Reporter: Peter Toth > Assignee: Peter Toth > Priority: Minor > Fix For: 3.1.0 > > > Empty relation children of a union can be removed. > e.g. the plan of > {noformat} > SELECT c FROM t UNION ALL SELECT c FROM t WHERE FALSE{noformat} > is currently: > {noformat} > == Physical Plan == > Union > :- *(1) Project [value#219 AS c#222] > : +- *(1) LocalTableScan [value#219] > +- LocalTableScan <empty>, [c#224]{noformat} > but it could be improved as: > {noformat} > == Physical Plan == > *(1) Project [value#219 AS c#222] > +- *(1) LocalTableScan [value#219]{noformat} -- This message was sent by Atlassian Jira (v8.3.4#803005) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org For additional commands, e-mail: issues-h...@spark.apache.org