[jira] [Assigned] (IMPALA-14996) Improvize count(*) for Iceberg V3 tables

["Arnab Karmakar (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/IMPALA-14996?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Arnab Karmakar reassigned IMPALA-14996:
---------------------------------------

    Assignee: Arnab Karmakar

> 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
>            Assignee: Arnab Karmakar
>            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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