[ https://issues.apache.org/jira/browse/SPARK-12770?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Reynold Xin updated SPARK-12770: -------------------------------- Description: There are a few things we can do: 1. If a branch is a true literal, remove the CaseWhen and use the value from that branch. 2. If a branch is a literal that is false or null, remove that branch. 3. If only the else branch is left, remove the CaseWhen and use the value from the else branch. > Implement rules for removing unnecessary branches for CaseWhen in > SimplifyConditionals > -------------------------------------------------------------------------------------- > > Key: SPARK-12770 > URL: https://issues.apache.org/jira/browse/SPARK-12770 > Project: Spark > Issue Type: Sub-task > Components: Optimizer, SQL > Reporter: Reynold Xin > > There are a few things we can do: > 1. If a branch is a true literal, remove the CaseWhen and use the value from > that branch. > 2. If a branch is a literal that is false or null, remove that branch. > 3. If only the else branch is left, remove the CaseWhen and use the value > from the else branch. -- 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