[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-7043) SQLServer2005Dialect should not use alias in the ORDER BY clause when paging

[William Rose (JIRA)]

    [ https://hibernate.onjira.com/browse/HHH-7043?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=46545#comment-46545 ] 

William Rose commented on HHH-7043:
-----------------------------------

I think the issue here is slightly different, in that the query template used for pagination could be better constructed. The current query template is:

{code:sql}
WITH query AS (
    select ROW_NUMBER() OVER(<<order by clause>>) AS __hibernate_row_nr__
         , <<query columns>>
    from <<table spec>>
    <<rest of query>>
)
SELECT *
FROM query
WHERE __hibernate_row_nr__ BETWEEN ? AND ?
{code}

Because the ROW_NUMBER() function is at the same level as the original query expressions, it cannot refer to their aliased names. If another level is introduced, it can:


{code:sql}
WITH q1 AS (
    select <<query columns>>
    from <<table spec>>
    <<rest of query>>
), q2 AS (
    SELECT ROW_NUMBER() OVER(<<order by clause>>) AS __hibernate_row_nr__
         , *
    FROM q1
)
SELECT *
FROM q2
WHERE __hibernate_row_nr__ BETWEEN ? AND ?
{code}


> SQLServer2005Dialect should not use alias in the ORDER BY clause when paging
> ----------------------------------------------------------------------------
>
>                 Key: HHH-7043
>                 URL: https://hibernate.onjira.com/browse/HHH-7043
>             Project: Hibernate ORM
>          Issue Type: Bug
>            Reporter: George Gastaldi
>            Assignee: Steve Ebersole
>
> Using alias in the OVER() statement is wrong, as http://msdn.microsoft.com/en-us/library/ms189461.aspx states that:
> {quote}
> When used in the context of a ranking window function, <ORDER BY Clause> can only refer to columns made available by the FROM clause. An integer cannot be specified to represent the position of the name or alias of a column in the select list. <ORDER BY Clause> cannot be used with aggregate window functions.
> {quote}

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