[jira] [Resolved] (CALCITE-6715) Enhance RelFieldTrimmer to trim LogicalCorrelate nodes

["Mihai Budiu (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CALCITE-6715?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Mihai Budiu resolved CALCITE-6715.
----------------------------------
    Fix Version/s: 1.39.0
       Resolution: Fixed

Fixed in https://github.com/apache/calcite/commit/20cc78e5f2424aed6a364afe4fb76e30cb96fef1
Thank you for the contribution, [~kgyrtkirk]
Thank the reviewers as well.

> Enhance RelFieldTrimmer to trim LogicalCorrelate nodes
> ------------------------------------------------------
>
>                 Key: CALCITE-6715
>                 URL: https://issues.apache.org/jira/browse/CALCITE-6715
>             Project: Calcite
>          Issue Type: Improvement
>            Reporter: Zoltan Haindrich
>            Assignee: Zoltan Haindrich
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 1.39.0
>
>
> Could enable the removal of irrelevant expressions below `LogcialCorrelate` expressions:
> In the following plan {{$f8=[+($0, $0)]}} is completely unused; so it should be removed:
> {code}
> LogicalAggregate(group=[{1}], agg#0=[MAX($0)])
>   LogicalCorrelate(correlation=[$cor0], joinType=[left], requiredColumns=[{7}])
>     LogicalProject(EMPNO=[$0], ENAME=[$1], JOB=[$2], ..., DEPTNO=[$7], $f8=[+($0, $0)])
>       LogicalTableScan(table=[[scott, EMP]])
>     LogicalFilter(condition=[=($0, +(10, $cor0.DEPTNO))])
>       LogicalTableScan(table=[[scott, DEPT]])
> {code}



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