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Posted to issues@spark.apache.org by "ASF GitHub Bot (Jira)" <ji...@apache.org> on 2024/08/17 17:16:00 UTC

[jira] [Updated] (SPARK-49275) Fix return type nullness of the xpath expression

     [ https://issues.apache.org/jira/browse/SPARK-49275?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

ASF GitHub Bot updated SPARK-49275:
-----------------------------------
    Labels: pull-request-available  (was: )

> Fix return type nullness of the xpath expression
> ------------------------------------------------
>
>                 Key: SPARK-49275
>                 URL: https://issues.apache.org/jira/browse/SPARK-49275
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 4.0.0
>            Reporter: Chenhao Li
>            Priority: Major
>              Labels: pull-request-available
>
> The `xpath` expression incorrectly marks its return type as array of non-null strings. However, it can actually return an array containing nulls. This can cause NPE in code generation, such as query `select coalesce(xpath(repeat('<a></a>', id), 'a')[0], '') from range(1, 2)`.



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