[jira] [Commented] (CALCITE-800) Window function defined within another window function should be blocked at validation

["Sean Hsuan-Yi Chu (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CALCITE-800?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14625591#comment-14625591 ] 

Sean Hsuan-Yi Chu commented on CALCITE-800:
-------------------------------------------

In SqlValidatorTest.testWindowClause, we have a positive test case :
"window w as (order by rank() over (order by sal))"

Is this window is invalid? We tried a similar thing is postgres:
{code}
postgres=# select rank() over(order by row_number() over(order by XXX)) from YYY;
ERROR:  window functions are not allowed in window definitions
{code}

Is it alright to remove that test case ? Otherwise, our patch will always break that one.

> Window function defined within another window function should be blocked at validation
> --------------------------------------------------------------------------------------
>
>                 Key: CALCITE-800
>                 URL: https://issues.apache.org/jira/browse/CALCITE-800
>             Project: Calcite
>          Issue Type: Bug
>            Reporter: Sean Hsuan-Yi Chu
>            Assignee: Sean Hsuan-Yi Chu
>
> For instance,
> {code}
> select sum(deptno) over (order by 
> sum(deptno) over(order by deptno)) 
> from emp
> {code}
> This is an invalid query. However, it passes the validation.



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