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https://issues.apache.org/jira/browse/SPARK-56054?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated SPARK-56054:
-----------------------------------
Labels: pull-request-available (was: )
> Fix aliased nested fields ignored for schema evolution in MERGE
> ---------------------------------------------------------------
>
> Key: SPARK-56054
> URL: https://issues.apache.org/jira/browse/SPARK-56054
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 4.2.0
> Reporter: Johan Lasperas
> Priority: Minor
> Labels: pull-request-available
>
> Small bug in the [initial implementation of schema evolution in
> MERGE](https://github.com/apache/spark/pull/51698): when a struct in the
> source is used aliased in a direct assignment clause in MERGE, it's fields
> aren't considered for schema evolution.
> Example:
> ```
> source.mergeInto("target", condition)
> .whenMatched()
> update(Map("info" -> col("source.info").as("info")))
> .withSchemaEvolution()
> .merge()
> ```
> where `info` is a struct that contains an extra field in the source compared
> to the target. The extra field is ignored during schema evolution and isn't
> added to the target table.
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