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https://issues.apache.org/jira/browse/IMPALA-12337?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17951660#comment-17951660
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Zoltán Borók-Nagy commented on IMPALA-12337:
--------------------------------------------
For reference, this is how Hive implements orphan file removal:
[https://github.com/apache/hive/blob/08067725bc6e8810579324736a0aac453c06bf7b/iceberg/iceberg-handler/src/main/java/org/apache/iceberg/mr/hive/actions/HiveIcebergDeleteOrphanFiles.java]
> Delete orphan files for Iceberg table
> -------------------------------------
>
> Key: IMPALA-12337
> URL: https://issues.apache.org/jira/browse/IMPALA-12337
> Project: IMPALA
> Issue Type: New Feature
> Components: Catalog, Frontend
> Reporter: Baike Xia
> Assignee: Baike Xia
> Priority: Major
> Labels: catalog-2024, impala-iceberg
>
> Removes all files from a table’s data directory that are not linked from
> metadata files and that are older than the value of older_than parameter.
> Deleting orphan files from time to time is recommended to keep size of a
> table’s data directory under control.
> {code:java}
> ALTER TABLE test_table EXECUTE remove_orphan_files(older_than = 1431691200)
> {code}
> See the syntax for expire_snapshot:IMPALA11362
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