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https://issues.apache.org/jira/browse/SPARK-25416?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16612817#comment-16612817
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Apache Spark commented on SPARK-25416:
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User 'dilipbiswal' has created a pull request for this issue:
https://github.com/apache/spark/pull/22407
> ArrayPosition function may return incorrect result when right expression is
> implicitly downcasted.
> --------------------------------------------------------------------------------------------------
>
> Key: SPARK-25416
> URL: https://issues.apache.org/jira/browse/SPARK-25416
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 2.4.0
> Reporter: Dilip Biswal
> Priority: Major
>
> In ArrayPosition, 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 :
> spark-sql> select array_position(array(1), 1.34);
> 1
> spark-sql> select array_position(array(1), 'foo');
> null
> We should safely coerce both left and right hand side expressions.
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