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From "Julian Hyde (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-10332) Use SortExchange rather than LogicalExchange for HiveOpConverter
Date Wed, 15 Apr 2015 07:48:59 GMT

    [ https://issues.apache.org/jira/browse/HIVE-10332?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14495820#comment-14495820
] 

Julian Hyde commented on HIVE-10332:
------------------------------------

No reason to remove LogicalExchange from Calcite, even if Hive doesn't use it.

We could create a LogicalSortExchange in Calcite if Hive would find it useful. (Unlike HiveSortExchange,
it would have logical convention.)

> Use SortExchange rather than LogicalExchange for HiveOpConverter
> ----------------------------------------------------------------
>
>                 Key: HIVE-10332
>                 URL: https://issues.apache.org/jira/browse/HIVE-10332
>             Project: Hive
>          Issue Type: Sub-task
>          Components: CBO
>            Reporter: Pengcheng Xiong
>            Assignee: Pengcheng Xiong
>             Fix For: cbo-branch
>
>         Attachments: HIVE-10332.01.patch
>
>
> Right now HiveSortExchange extends SortExchange extends Exchange. LogicalExchange extends
Exchange. LogicalExchange is expected in HiveOpConverter but HiveSortExchange is created.
After discussion, we plan to change LogicalExchange to HiveSortExchange.



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