[jira] [Assigned] (SPARK-41931) Improve UNSUPPORTED_DATA_TYPE message for complex types

["Apache Spark (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-41931?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Apache Spark reassigned SPARK-41931:
------------------------------------

    Assignee: Apache Spark

> Improve UNSUPPORTED_DATA_TYPE message for complex types
> -------------------------------------------------------
>
>                 Key: SPARK-41931
>                 URL: https://issues.apache.org/jira/browse/SPARK-41931
>             Project: Spark
>          Issue Type: Improvement
>          Components: Spark Core
>    Affects Versions: 3.4.0
>            Reporter: Serge Rielau
>            Assignee: Apache Spark
>            Priority: Major
>
> spark-sql> SELECT CAST(array(1, 2, 3) AS ARRAY);
> [UNSUPPORTED_DATATYPE] Unsupported data type "ARRAY"(line 1, pos 30)
> == SQL ==
> SELECT CAST(array(1, 2, 3) AS ARRAY)
> ------------------------------^^^
> This error message is confusing. We support ARRAY. We just require it to be typed.
> We should have an error like:
> [INCOMPLETE_TYPE_DEFINITION.ARRAY] The definition of type `ARRAY` is incomplete. You must provide an element type. For example: `ARRAY\<INT\>`.
> Similarly for STRUCT and MAP.  



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