[jira] [Assigned] (SPARK-7437) Fold "literal in (item1, item2, ..., literal, ...)" into false directly if not in.

["Apache Spark (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-7437?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Apache Spark reassigned SPARK-7437:
-----------------------------------

    Assignee:     (was: Apache Spark)

> Fold "literal in (item1, item2, ..., literal, ...)" into false directly if not in.
> ----------------------------------------------------------------------------------
>
>                 Key: SPARK-7437
>                 URL: https://issues.apache.org/jira/browse/SPARK-7437
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 1.3.1
>            Reporter: Zhongshuai Pei
>
> Just Fold "literal in (item1, item2, ..., literal, ...)" into true directly if in
> {noformat}
> case In(Literal(v, _), list) if list.exists {
>           case Literal(candidate, _) if candidate == v => true
>           case _ => false
>         } => Literal.create(true, BooleanType)
> {noformat}
> Should Fold "literal in (item1, item2, ..., literal, ...)" into true or false directly.
> {noformat}
>       case In(Literal(v, _), list) =>
>         val isExists = list.exists {
>           case Literal(candidate, _) if candidate == v => true
>           case _ => false
>         }
>         if (isExists) Literal.create(true, BooleanType) else Literal.create(false, BooleanType)
> {noformat}



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