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https://issues.apache.org/jira/browse/SPARK-25417?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wenchen Fan resolved SPARK-25417.
---------------------------------
Resolution: Fixed
Fix Version/s: 2.4.0
Issue resolved by pull request 22408
[https://github.com/apache/spark/pull/22408]
> ArrayContains function may return incorrect result when right expression is
> implicitly down casted
> --------------------------------------------------------------------------------------------------
>
> Key: SPARK-25417
> URL: https://issues.apache.org/jira/browse/SPARK-25417
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 2.4.0
> Reporter: Dilip Biswal
> Assignee: Dilip Biswal
> Priority: Major
> Fix For: 2.4.0
>
>
> In ArrayContains, we currently cast the right hand side expression to match
> the element type of the left hand side Array. This may result in down casting
> and may return wrong result or questionable result.
> Example :
> {code:java}
> spark-sql> select array_position(array(1), 1.34);
> true
> {code}
>
> {code:java}
> spark-sql> select array_position(array(1), 'foo');
> null
> {code}
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