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https://issues.apache.org/jira/browse/HIVE-25851?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17485233#comment-17485233
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Stamatis Zampetakis commented on HIVE-25851:
--------------------------------------------

While reviewing HIVE-25758 I got the impression that some changes in 
`RelMdPredicate` class of calcite could possibly solve some infinite rule 
matching problems. [~asolimando] Have you experimented if the changes there 
solve the problems in HIVE-25758?

> Replace HiveRelMdPredicate with RelMdPredicate from Calcite
> -----------------------------------------------------------
>
>                 Key: HIVE-25851
>                 URL: https://issues.apache.org/jira/browse/HIVE-25851
>             Project: Hive
>          Issue Type: Improvement
>          Components: CBO
>    Affects Versions: 4.0.0
>            Reporter: Alessandro Solimando
>            Priority: Major
>
> `HiveRelMdPredicates` was copied from `RelMdPredicates` in Calcite long ago, 
> it has few differences which could be ported to the Calcite version, if 
> needed.
> The goal of the ticket is to:
> # ascertain which are the additional features in `HiveRelMdPredicates`, port 
> them to Calcite if needed
> # drop `HiveRelMdPredicates` in favour of `RelMdPredicates` in order to 
> benefit from all the advances in such class



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