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From: Richard B. (JIRA) <nh...@gm...> - 2011-05-01 10:45:50
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[ http://216.121.112.228/browse/NH-2683?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=20986#action_20986 ]
Richard Brown commented on NH-2683:
-----------------------------------
In addition, the documentation can be extended to include examples using the extension methods (both the new ones, and existing ones).
> Add common dialect functions as extension methods for QueryOver
> ---------------------------------------------------------------
>
> Key: NH-2683
> URL: http://216.121.112.228/browse/NH-2683
> Project: NHibernate
> Issue Type: Improvement
> Components: QueryOver
> Affects Versions: 3.2.0Alpha2
> Reporter: Richard Brown
> Assignee: Richard Brown
> Priority: Minor
>
> Some of the common functions (that are registered in most, if not all Dialects) can be used in ICriteria using SQL-projections.
> Extensions methods can be added for these to allow queries along the lines of:
> s.QueryOver<Person>()
> .Where(p => p.BirthDate.Year() == 1970)
> .List()
> ... which can be translated to:
> .Where(Restrictions.Eq(Projections.SqlFunction("year", NHibernateUtil.DateTime, Projections.Property<Person>(p => p.BirthDate)), 1970))
> ... and in turn to:
> datepart(year, this_.BirthDate) = @p0;
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