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[nhibernate-issues] [NHJIRA] Assigned: (NH-2214) Distinct and Row_number problem
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From: Julian M. (JIRA) <nh...@gm...> - 2011-04-11 14:48:04
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[ http://216.121.112.228/browse/NH-2214?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Julian Maughan reassigned NH-2214:
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Assignee: Julian Maughan
> Distinct and Row_number problem
> -------------------------------
>
> Key: NH-2214
> URL: http://216.121.112.228/browse/NH-2214
> Project: NHibernate
> Issue Type: Bug
> Components: DataProviders / Dialects
> Affects Versions: 2.1.1.GA, 2.1.2.GA
> Reporter: Carlos Martinez
> Assignee: Julian Maughan
> Priority: Major
> Attachments: MsSql2005Dialect.cs, NH-2214-reproduction.zip, NH-2214.patch, NH-2214.patch, NH-2214.zip
>
>
> Microsoft.NET Framework 3.5
> MSSQL 2008
> Select distinct T.ID, T.Name from T
> inner join T2 on T.ID = T2.TID
> order by T.Name
> With this native query (using ISQLQuery) and the statement "DISTINCT" is necessary because the union wiht T2 produces duplicate results of T.
> if I use
> SetFirstResult(index)
> SetMaxResults(max)
> It generates the following Query
> Select top max
> ID,
> Name
> from
> (select distinct
> ID,
> Name,
> ROW_NUMBER () over (order by T.Name) as __hibernate_sort_row
> from T
> inner join T2) as query
> where __hibernate_sort_row > index
> first results are generated with ROW_NUMER, for example
> T.ID T.Name __hibernate_sort_row
> 2 Carlos 1
> 1 Juan 2
> 1 Juan 3
> 3 Paulina 4
> 4 Zunio 5
> 4 Zunio 6
> 4 Zunio 7
> Then "DISTINCT" no longer makes sense, because all records are different due to ROW_NUMBER.
> In version 2.0.1 GA works perfectly
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