[ https://issues.apache.org/jira/browse/SPARK-9489?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Apache Spark reassigned SPARK-9489: ----------------------------------- Assignee: Josh Rosen (was: Apache Spark) > Remove compatibleWith, meetsRequirements, and needsAnySort checks from > Exchange > ------------------------------------------------------------------------------- > > Key: SPARK-9489 > URL: https://issues.apache.org/jira/browse/SPARK-9489 > Project: Spark > Issue Type: Improvement > Components: SQL > Reporter: Josh Rosen > Assignee: Josh Rosen > > While reviewing [~yhuai]'s patch for SPARK-2205, I noticed that Exchange's > {{compatible}} check may be incorrectly returning {{false}} in many cases. > As far as I know, this is not actually a problem because the {{compatible}}, > {{meetsRequirements}}, and {{needsAnySort}} checks are serving only as > short-circuit performance optimizations that are not necessary for > correctness. > In order to reduce code complexity, I think that we should remove these > checks and unconditionally rewrite the operator's children. This should be > safe because we rewrite the tree in a single bottom-up pass. -- This message was sent by Atlassian JIRA (v6.3.4#6332) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org For additional commands, e-mail: issues-h...@spark.apache.org