[jira] [Closed] (CALCITE-5391) JoinOnUniqueToSemiJoinRule should preserve field names, if possible

["Jess Balint (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CALCITE-5391?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jess Balint closed CALCITE-5391.
--------------------------------

Resolved in release 1.33.0 (2023-02-06)

> JoinOnUniqueToSemiJoinRule should preserve field names, if possible
> -------------------------------------------------------------------
>
>                 Key: CALCITE-5391
>                 URL: https://issues.apache.org/jira/browse/CALCITE-5391
>             Project: Calcite
>          Issue Type: Bug
>    Affects Versions: 1.32.0
>            Reporter: Scott Reynolds
>            Assignee: Scott Reynolds
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 1.33.0
>
>          Time Spent: 20m
>  Remaining Estimate: 0h
>
> The new rule pushes a copy of the [original project without the alias names|https://github.com/apache/calcite/pull/2848/files#r1026959819] 
> {code:java}
> builder.project(project.getProjects());
> {code}
> This results in a new SQL plan without the name fields -- they become {{$fN}} fields in different plans. 
> Small change is required to put the names from the {{RelDataType}} of the {{Project}} similar to the other {{Semijoin}} rule.



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