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https://issues.apache.org/jira/browse/SPARK-46539?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Max Gekk reassigned SPARK-46539:
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Assignee: Stefan Kandic
> SELECT * EXCEPT(all fields from a struct) results in an assertion failure
> -------------------------------------------------------------------------
>
> Key: SPARK-46539
> URL: https://issues.apache.org/jira/browse/SPARK-46539
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 3.0.0
> Reporter: Stefan Kandic
> Assignee: Stefan Kandic
> Priority: Major
> Labels: pull-request-available
> Fix For: 4.0.0
>
>
> This example
> {code:sql}
> -- Removing all fields results in an empty struct
> > SELECT * EXCEPT(c1.a) FROM VALUES(named_struct('a', 1)) AS t(c1);
> {code}
> throws an AssertionError during serialization:
> {code:java}
> AssertionError: assertion failed: each serializer expression should contain
> at least one `BoundReference`
> {code}
> instead of just return an empty struct
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