[jira] [Updated] (SPARK-47528) Add UserDefinedType support to DataTypeUtils.canWrite

["ASF GitHub Bot (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-47528?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

ASF GitHub Bot updated SPARK-47528:
-----------------------------------
    Labels: pull-request-available  (was: )

> Add UserDefinedType support to DataTypeUtils.canWrite
> -----------------------------------------------------
>
>                 Key: SPARK-47528
>                 URL: https://issues.apache.org/jira/browse/SPARK-47528
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 4.0.0
>            Reporter: L. C. Hsieh
>            Assignee: L. C. Hsieh
>            Priority: Major
>              Labels: pull-request-available
>
> Our customer hits an issue recently when they tries to save a DataFrame containing some UDTs as table (`saveAsTable`). The error looks like:
> ```
> - Cannot write 'xxx': struct<...> is incompatible with struct<...>
> ```
> The catalog strings between two sides are actually same which makes the customer confused.
> It is because `DataTypeUtils.canWrite` doesn't handle `UserDefinedType`. If the `UserDefinedType`'s underlying sql type is same as read side, `canWrite` should return true for two sides.



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