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

["Danny Chen (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CALCITE-3713?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17036071#comment-17036071 ] 

Danny Chen commented on CALCITE-3713:
-------------------------------------

Why we use "inputs" in the digest to represent the "input references" in the project digest, it makes me think of the project node's rel inputs, a bad naming, i think.

> 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
>             Fix For: 1.22.0
>
>          Time Spent: 4h 50m
>  Remaining Estimate: 0h
>
> 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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