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https://issues.apache.org/jira/browse/HIVE-26427?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Thomas Rebele updated HIVE-26427:
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Parent: HIVE-29738
Issue Type: Sub-task (was: Improvement)
> Unify JoinDeriveIsNotNullFilterRule with HiveJoinAddNotNullRule
> ---------------------------------------------------------------
>
> Key: HIVE-26427
> URL: https://issues.apache.org/jira/browse/HIVE-26427
> Project: Hive
> Issue Type: Sub-task
> Components: CBO
> Reporter: Stamatis Zampetakis
> Priority: Major
>
> [JoinDeriveIsNotNullFilterRule|https://github.com/apache/calcite/blob/9bdd26159110663c4a207e3e8c378d1c3d16e034/core/src/main/java/org/apache/calcite/rel/rules/JoinDeriveIsNotNullFilterRule.java]
> has been introduced recently in Calcite as part of CALCITE-3890.
> The rule has similar goals with HiveJoinAddNotNullRule (that exists in Hive
> since HIVE-9581) so ideally (and in order to avoid maintaining the code
> twice) we should use the one provided by Calcite if possible.
> At this stage the rules are not identical so we cannot replace one with the
> other immediately but hopefully we can work together with the Calcite
> community to reuse common parts so both project can benefit from each other.
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