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Posted to issues-all@impala.apache.org by "Zoltán Borók-Nagy (Jira)" <ji...@apache.org> on 2026/05/14 16:09:00 UTC

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

Zoltán Borók-Nagy created IMPALA-14996:
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             Summary: 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


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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