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Posted to issues@calcite.apache.org by "ASF GitHub Bot (Jira)" <ji...@apache.org> on 2020/01/09 17:21:00 UTC

[jira] [Updated] (CALCITE-3713) Remove column names from Project#digest

     [ https://issues.apache.org/jira/browse/CALCITE-3713?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

ASF GitHub Bot updated CALCITE-3713:
------------------------------------
    Labels: pull-request-available  (was: )

> Remove column names from Project#digest
> ---------------------------------------
>
>                 Key: CALCITE-3713
>                 URL: https://issues.apache.org/jira/browse/CALCITE-3713
>             Project: Calcite
>          Issue Type: Bug
>          Components: core
>    Affects Versions: 1.21.0
>            Reporter: Vladimir Sitnikov
>            Assignee: Vladimir Sitnikov
>            Priority: Major
>              Labels: pull-request-available
>
> Projects that differ with column names only are equivalent, so the planning space can be reduced if field names do not participate in relation matching.
> For instance, {{Project(input=rel#1,empid=$0)}} and {{Project(input=rel#1,deptno=$0)}} are equivalent



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