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https://issues.apache.org/jira/browse/CALCITE-802?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14630140#comment-14630140
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Julian Hyde commented on CALCITE-802:
-------------------------------------
Why? Does the SQL standard forbid it? The following query is equivalent to your
query, well-defined, and allowed by the SQL standard, so it seems that your
query should be allowed also:
{code}
select empno, r from (
select empno,
rank() over(partition by deptno order by empno) as r,
row_number() over(partition by deptno order by empno) as rn
from emp)
order by rn
{code}
> OVER clause in Order-By should be blocked at validation
> -------------------------------------------------------
>
> Key: CALCITE-802
> URL: https://issues.apache.org/jira/browse/CALCITE-802
> Project: Calcite
> Issue Type: Bug
> Components: core
> Reporter: Sean Hsuan-Yi Chu
> Assignee: Sean Hsuan-Yi Chu
>
> We found a similar issue to Calcite-800. An example is as below:
> select empno, rank() over(partition by deptno order by empno)
> from emp
> order by row_number() over(partition by deptno order by empno)
> Order by should not contain OVER.
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