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https://issues.apache.org/jira/browse/SPARK-28052?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dongjoon Hyun resolved SPARK-28052.
-----------------------------------
       Resolution: Fixed
    Fix Version/s: 3.0.0

Issue resolved by pull request 24873
[https://github.com/apache/spark/pull/24873]

> ArrayExists should follow the three-valued boolean logic.
> ---------------------------------------------------------
>
>                 Key: SPARK-28052
>                 URL: https://issues.apache.org/jira/browse/SPARK-28052
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 2.4.3
>            Reporter: Takuya Ueshin
>            Assignee: Takuya Ueshin
>            Priority: Major
>             Fix For: 3.0.0
>
>
> Currently {{ArrayExists}} always returns boolean values (if the arguments are 
> not null), but it should follow the three-valued boolean logic:
>  - {{true}} if the predicate holds at least oneĀ {{true}}
>  - otherwise, {{null}} if the predicate holds {{null}}
>  - otherwise, {{false}}



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