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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