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https://issues.apache.org/jira/browse/IMPALA-11655?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Zoltán Borók-Nagy resolved IMPALA-11655.
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Fix Version/s: Impala 4.2.0
Resolution: Fixed
> Impala should set merge-on-read by default
> ------------------------------------------
>
> Key: IMPALA-11655
> URL: https://issues.apache.org/jira/browse/IMPALA-11655
> Project: IMPALA
> Issue Type: Bug
> Components: Frontend
> Reporter: Zoltán Borók-Nagy
> Assignee: Zoltán Borók-Nagy
> Priority: Major
> Labels: impala-iceberg
> Fix For: Impala 4.2.0
>
>
> Similarly to HIVE-26596 Impala should set merge-on-read delete mode for V2
> tables, unless otherwise specified:
> * during table creation with 'format-version'='2'
> * during alter table set tblproperties 'format-version'='2'
> We do so because in the foreseeable future Impala will only support
> merge-on-read (on the write-side, on the read side copy-on-write is also
> supported). Also, currently Hive only supports merge-on-read for DELETEs and
> UPDATEs.
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