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https://issues.apache.org/jira/browse/SPARK-50119?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17892795#comment-17892795
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Dusan Tisma commented on SPARK-50119:
-------------------------------------
Working on this
> UnresolvedException thrown instead of
> INVALID_LAMBDA_FUNCTION_CALL.NON_HIGHER_ORDER_FUNCTION
> --------------------------------------------------------------------------------------------
>
> Key: SPARK-50119
> URL: https://issues.apache.org/jira/browse/SPARK-50119
> Project: Spark
> Issue Type: Improvement
> Components: Spark Core
> Affects Versions: 4.0.0
> Reporter: Dusan Tisma
> Priority: Minor
>
> Lambdas in non-higher order functions throw
> {code:java}
> INVALID_LAMBDA_FUNCTION_CALL.NON_HIGHER_ORDER_FUNCTION{code}
> , however this is only thrown from other functions, and not anywhere in the
> query.
> {code:java}
> select if(x -> x = 2, 10, 20){code}
> throws
> {code:java}
> INVALID_LAMBDA_FUNCTION_CALL.NON_HIGHER_ORDER_FUNCTION{code}
> ,
> {code:java}
> select if(not x -> x = 2, 10, 20) {code}
> throws
> {code:java}
> UnresolvedException{code}
> The user error in the latter case needs improvement
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