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Posted to issues@hive.apache.org by "ASF GitHub Bot (Jira)" <ji...@apache.org> on 2022/11/17 05:33:00 UTC
[jira] [Updated] (HIVE-26747) Remove implementor from HiveRelNode
[ https://issues.apache.org/jira/browse/HIVE-26747?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
ASF GitHub Bot updated HIVE-26747:
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Labels: pull-request-available (was: )
> Remove implementor from HiveRelNode
> -----------------------------------
>
> Key: HIVE-26747
> URL: https://issues.apache.org/jira/browse/HIVE-26747
> Project: Hive
> Issue Type: Task
> Components: CBO
> Reporter: Krisztian Kasa
> Assignee: Krisztian Kasa
> Priority: Minor
> Labels: pull-request-available
> Time Spent: 10m
> Remaining Estimate: 0h
>
> Calcite's VolcanoPlanner [1] relies on calling convention [2]. In Hive this is represented by the [HiveRelNode|https://github.com/apache/hive/blob/master/ql/src/java/org/apache/hadoop/hive/ql/optimizer/calcite/reloperators/HiveRelNode.java] interface's {{CONVENTION}} field.
> This interface has to be implemented by all Hive operators to have the Hive calling convention behavior. The interface also defines the
> {code:java}
> void implement(Implementor implementor);
> {code}
> method but none of the operators gives an implementation and the method is never called.
> [1] [https://15721.courses.cs.cmu.edu/spring2017/papers/14-optimizer1/graefe-icde1993.pdf]
> [2] [https://arxiv.org/pdf/1802.10233.pdf] (Section 4, traits)
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