[jira] [Updated] (CALCITE-7104) Remove duplicate sort keys

["weihua zhang (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CALCITE-7104?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

weihua zhang updated CALCITE-7104:
----------------------------------
    Summary: Remove duplicate sort keys  (was: Remove duplicat sort keys)

> Remove duplicate sort keys
> --------------------------
>
>                 Key: CALCITE-7104
>                 URL: https://issues.apache.org/jira/browse/CALCITE-7104
>             Project: Calcite
>          Issue Type: Improvement
>            Reporter: weihua zhang
>            Priority: Major
>
> {code:sql}
> select d1 from  (select deptno as d1, deptno as d2 from dept ) as tmp order by d1, d2;
> {code}
> {noformat}
> LogicalProject(D1=[$0]), id = 2284
>   LogicalSort(sort0=[$0], sort1=[$1], dir0=[ASC], dir1=[ASC]), id = 2283
>     LogicalProject(D1=[$0], D2=[$0]), id = 2282
>       LogicalTableScan(table=[[default, dept]]), id = 2278
> {noformat}
> LogicalSort can change to:
> {noformat}
> LogicalProject(D1=[$0]), id = 2284
>   LogicalSort(sort0=[$0], dir0=[ASC]), id = 2283
>     LogicalProject(D1=[$0], D2=[$0]), id = 2282
>       LogicalTableScan(table=[[default, dept]]), id = 2278
> {noformat}



--
This message was sent by Atlassian Jira
(v8.20.10#820010)