[jira] [Updated] (HIVE-28126) Use added record count in cost model when rebuilding materialized view stored by iceberg

["Krisztian Kasa (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HIVE-28126?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Krisztian Kasa updated HIVE-28126:
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    Summary: Use added record count  in cost model when rebuilding materialized view stored by iceberg  (was: Use added row count in cost model when rebuilding materialized view stored by iceberg)

> Use added record 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
>            Priority: Major
>
> 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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