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https://issues.apache.org/jira/browse/IMPALA-14996?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Zoltán Borók-Nagy updated IMPALA-14996:
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Labels: impala-iceberg ramp-up (was: impala-iceberg)
> Improvize count(*) for Iceberg V3 tables
> ----------------------------------------
>
> Key: IMPALA-14996
> URL: https://issues.apache.org/jira/browse/IMPALA-14996
> Project: IMPALA
> Issue Type: Improvement
> Reporter: Zoltán Borók-Nagy
> Priority: Major
> Labels: impala-iceberg, ramp-up
>
> We can optimize count(*) queries further for Iceberg V3 tables that only have
> Deletion Vectors.
> Basically we can do everything at query compilation time:
> count(*) = count(data records) - count(delete entries)
> Deletion Vectors can't have duplicates so we can safely use their record
> counts.
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