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https://issues.apache.org/jira/browse/IMPALA-11388?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17793344#comment-17793344
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Gabor Kaszab commented on IMPALA-11388:
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FYI, I decided to make this an EPIC and split the work up to multiple items so
that we can deliver functionality gradually.
> Add support for equality-based deletes
> --------------------------------------
>
> Key: IMPALA-11388
> URL: https://issues.apache.org/jira/browse/IMPALA-11388
> Project: IMPALA
> Issue Type: Epic
> Components: Frontend
> Reporter: Zoltán Borók-Nagy
> Assignee: Gabor Kaszab
> Priority: Major
> Labels: impala-iceberg
>
> Iceberg V2 adds support for row-level modifications.
> One way to implement this is via equality based delete files:
> https://iceberg.apache.org/spec/#equality-delete-files
> https://iceberg.apache.org/spec/#scan-planning
> We could implement this via doing ANTI HASH JOIN between data and delete
> files. Similarly to what we do for Hive full ACID tables:
> https://github.com/apache/impala/blob/f5fc08573352d0a1943296209791a4db17268086/fe/src/main/java/org/apache/impala/planner/SingleNodePlanner.java#L1729-L1735
> The complexity comes when different delete files use different set of
> columns. In that case we will need multiple ANTI HASH JOINs on top of each
> other.
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