Krisztian Kasa created HIVE-28126:
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Summary: Use added row count in cost model when rebuilding
materialized view stored by iceberg
Key: HIVE-28126
URL: https://issues.apache.org/jira/browse/HIVE-28126
Project: Hive
Issue Type: Improvement
Components: Iceberg integration, Materialized views
Reporter: Krisztian Kasa
Assignee: Krisztian Kasa
There is a cost based decision when rebuilding materialized views having
aggregate.
Currently the cost model has the total count of rows of source table however
incremental rebuild plan scans only the rows inserted since the last MV rebuild.
The goal is to update the row count in the cost model in case of Iceberg source
tables with the sum of the {{added-records}} stored in snapshots summary since
the last Mv rebuild.
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