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Posted to issues@spark.apache.org by "Dongjoon Hyun (Jira)" <ji...@apache.org> on 2025/11/10 21:01:00 UTC

[jira] [Updated] (SPARK-52991) Implement MERGE INTO with SCHEMA EVOLUTION for V2 DataSource

     [ https://issues.apache.org/jira/browse/SPARK-52991?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Dongjoon Hyun updated SPARK-52991:
----------------------------------
    Parent Issue: SPARK-54274  (was: SPARK-51166)

> Implement MERGE INTO with SCHEMA EVOLUTION for V2 DataSource
> ------------------------------------------------------------
>
>                 Key: SPARK-52991
>                 URL: https://issues.apache.org/jira/browse/SPARK-52991
>             Project: Spark
>          Issue Type: Sub-task
>          Components: SQL
>    Affects Versions: 4.1.0
>            Reporter: Szehon Ho
>            Assignee: Szehon Ho
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 4.1.0
>
>
> https://issues.apache.org/jira/browse/SPARK-47627 already add the syntax for MERGE WITH SCHEMA EVOLUTION INTO. to support schema evolution if the SOURCE table has different schema than TARGET table. 
> However, this require some external Spark extension to make a custom merge plan, and is not used natively by Spark when making Merge plan.
> We should honor the syntax when Spark makes the Merge plan for data source that support it (currently V2 Data Sources)



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