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https://issues.apache.org/jira/browse/SPARK-54721?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated SPARK-54721:
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Labels: pull-request-available (was: )
> Completely disable feature 'nested struct coercion' for MERGE INTO
> ------------------------------------------------------------------
>
> Key: SPARK-54721
> URL: https://issues.apache.org/jira/browse/SPARK-54721
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 4.1.0
> Reporter: Szehon Ho
> Priority: Major
> Labels: pull-request-available
>
> As https://github.com/apache/spark/pull/53326 is not allowed for Spark 4.1 ,
> we should disable the feature completely then. It doesn't make sense to
> allow the user to opt-in the feature, when we plan to completely change the
> meaning for subsequent releases.
> Background, without this, there is a risk of data loss, because values for
> nested field that do not exist in source are all nullified in MERGE INTO with
> UPDATE SET *
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