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https://issues.apache.org/jira/browse/SPARK-48845?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dongjoon Hyun closed SPARK-48845.
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> GenericUDF Can not CatchException From Child UDFs
> -------------------------------------------------
>
> Key: SPARK-48845
> URL: https://issues.apache.org/jira/browse/SPARK-48845
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 3.5.0, 3.5.1
> Reporter: Junqing Li
> Assignee: Junqing Li
> Priority: Major
> Labels: pull-request-available
> Fix For: 3.5.2, 4.0.0
>
>
> During the upgrade from Spark 3.3.1 to 3.5.1, we encountered syntax issues
> with this pr. The problem arose from DeferredObject currently passing a value
> instead of a function, which prevented users from catching exceptions in
> GenericUDF, resulting in semantic differences.
> Here is an example case we encountered. Originally, the semantics were that
> {{str_to_map_udf}} would throw an exception due to issues with the input
> string, while {{merge_map_udf}} could catch the exception and return a null
> value. However, currently, any exception encountered by {{str_to_map_udf}}
> will cause the program to fail.
> {code:java}
> select merge_map_udf(str_to_map_udf(col1), parse_map_udf(col2), map("key",
> "value")) from table {code}
>
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