[ https://issues.apache.org/jira/browse/SPARK-25860?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Apache Spark reassigned SPARK-25860: ------------------------------------ Assignee: Apache Spark > Replace Literal(null, _) with FalseLiteral whenever possible > ------------------------------------------------------------ > > Key: SPARK-25860 > URL: https://issues.apache.org/jira/browse/SPARK-25860 > Project: Spark > Issue Type: Improvement > Components: Optimizer, SQL > Affects Versions: 3.0.0 > Reporter: Anton Okolnychyi > Assignee: Apache Spark > Priority: Major > > We should have a new optimization rule that replaces {{Literal(null, _)}} > with {{FalseLiteral}} in conditions in {{Join}} and {{Filter}}, predicates in > {{If}}, conditions in {{CaseWhen}}. > The underlying idea is that those expressions evaluate to {{false}} if the > underlying expression is {{null}} (as an example see > {{GeneratePredicate$create}} or {{doGenCode}} and {{eval}} methods in {{If}} > and {{CaseWhen}}). Therefore, we can replace {{Literal(null, _)}} with > {{FalseLiteral}}, which can lead to more optimizations later on. -- This message was sent by Atlassian JIRA (v7.6.3#76005) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org For additional commands, e-mail: issues-h...@spark.apache.org