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https://issues.apache.org/jira/browse/SPARK-41931?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Max Gekk resolved SPARK-41931.
------------------------------
Fix Version/s: 3.5.0
Resolution: Fixed
Issue resolved by pull request 39711
[https://github.com/apache/spark/pull/39711]
> 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: Max Gekk
> Priority: Major
> Fix For: 3.5.0
>
>
> 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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