[jira] [Commented] (CALCITE-1954) SqlValidator need to maintain forceNullable across joins and renaming

["MinJi Kim (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CALCITE-1954?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16131439#comment-16131439 ] 

MinJi Kim commented on CALCITE-1954:
------------------------------------

A small patch, but would appreciate another set of eyes to review this.  Thank you!

https://github.com/apache/calcite/pull/522

> SqlValidator need to maintain forceNullable across joins and renaming
> ---------------------------------------------------------------------
>
>                 Key: CALCITE-1954
>                 URL: https://issues.apache.org/jira/browse/CALCITE-1954
>             Project: Calcite
>          Issue Type: Bug
>            Reporter: MinJi Kim
>            Assignee: Julian Hyde
>
> In the following query below, SqlValidator return rowtype with the second column as NOT NULL.  Since this is a left outer join, it should be nullable.
> {code}
> select * from
>   (select row_number() over (order by sal) from emp) as emp1(r1) 
>   left outer join 
>   (select  dense_rank() over(order by sal) from emp) as emp2(r2) 
>   on (emp1.r1 = emp2.r2)
> {code}



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