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https://issues.apache.org/jira/browse/HIVE-25974?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Denys Kuzmenko updated HIVE-25974:
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Issue Type: Improvement (was: Bug)
> Drop HiveFilterMergeRule and use FilterMergeRule from Calcite
> -------------------------------------------------------------
>
> Key: HIVE-25974
> URL: https://issues.apache.org/jira/browse/HIVE-25974
> Project: Hive
> Issue Type: Improvement
> Components: CBO
> Affects Versions: 4.0.0
> Reporter: Alessandro Solimando
> Priority: Major
>
> HiveFilterMergeRule is a copy of FilterMergeRule which was needed since the
> latter did not simplify/flatten before creating the merged filter.
> This behaviour has been fixed in CALCITE-3982 (released since 1.23), so it
> seems that the Hive rule could be removed now.
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