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Posted to issues@spark.apache.org by "Wenchen Fan (Jira)" <ji...@apache.org> on 2021/04/21 15:38:00 UTC

[jira] [Assigned] (SPARK-34692) Support Not(Int) and Not(InSet) propagate null

     [ https://issues.apache.org/jira/browse/SPARK-34692?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Wenchen Fan reassigned SPARK-34692:
-----------------------------------

    Assignee: ulysses you

> Support Not(Int) and Not(InSet) propagate null
> ----------------------------------------------
>
>                 Key: SPARK-34692
>                 URL: https://issues.apache.org/jira/browse/SPARK-34692
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 3.2.0
>            Reporter: ulysses you
>            Assignee: ulysses you
>            Priority: Minor
>
> The semantics of `Not(In)` could be seen like `And(a != b, a != c)` that match the `NullIntolerant`.
> As we already simplify the `NullIntolerant` expression to null if it's children have null. E.g. `a != null` => `null`. It's safe to do this with `Not(In)`/`Not(InSet)`.



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