Try = 1
On Mon, Sep 22, 2008 at 4:23 PM, burkhard_m
<[EMAIL PROTECTED]>wrote:
>
> @Eric: thanks the Expression.Sql() restriction works.
> Anyhow there must be a way to register the function with NHibernate.
> So I tried Ayende Rahien's suggestion but still no success.
>
> I registered the CONTAINS function like this:
> RegisterFunction("contains", new
> SQLFunctionTemplate(NHibernateUtil.Boolean, "contains(?1,?2)"))); [/
> code]
>
> So now, the HQL parser expects CONTAINS to be a function with return
> type boolean. In other words, its a [i]predicate[/i], a boolean-valued
> characteristic function.
>
> So I wrote the query like this:
> ISession session = GetSession();
> var result = session.CreateQuery("FROM Description d WHERE
> contains( d.Text, :searchValue)").SetString("searchValue", "\"Text*
> \"").List();
>
> But NHibernate complains, because it expects a comparison, like
> ... WHERE contains( d.Text, :searchValue) = TRUE ...
>
> So I changed the query to:
> ISession session = GetSession();
> var result = session.CreateQuery("FROM Description d WHERE
> contains( d.Text, :searchValue)" = TRUE).SetString("searchValue",
> "\"Text*\"").List();
> Now the query is accepted by NHibernate, but of course that's no valid
> SQL statement and MSSQL Server complains about the syntax.
>
> I found the same problem described here:
> http://forum.hibernate.org/viewtopic.php?p=2386233
>
> So the question is, how do I treat predicate functions?
> And how do I express the query, that both NHibernate and MSSQL-Server
> accept it?
>
>
> On 19 Sep., 17:35, Eric Hauser <[EMAIL PROTECTED]> wrote:
> > If you don't want to mess with learning the Criteria API for complex
> > queries, then just use the native SQL option:
> >
> > http://www.hibernate.org/hib_docs/nhibernate/html/querysql.html
> >
> > On Sep 19, 11:10 am, burkhard_m <[EMAIL PROTECTED]>
> > wrote:
> >
> >
> >
> > > Hi Eric,
> >
> > > Thanks, I read about that kind of solution. But in my case it's rather
> > > complicated.
> >
> > > For each Article we have diffrent kind of lists containing
> > > descriptions in diffrent languages.
> > > In particular we have ShortTexts, LongTexts, Keywords and MediaTexts
> > > for each Article.
> >
> > > Here is a sample query using the LIKE-Expression:
> >
> > > new SimpleQuery<Article>(typeof(Article), "SELECT DISTINCT a FROM
> > > Article a, ShortTextDescriptionContainer stc, ShortTextDescription sd,
> > > LongTextDescriptionContainer ltc, LongTextDescription ld WHERE (stc
> > > IN elements(a.ShortTexts) AND sd IN (FROM stc.Content WHERE Text
> > > LIKE ?)) OR (ltc IN elements(a.LongTexts) AND ld IN (FROM ltc.Content
> > > WHERE Text LIKE ?))", "%Calculator%", "%Calculator%");
> >
> > > Of course we've got a lot of descriptions and using the LIKE-
> > > Expression takes minutes. So we'd like to use full text search
> > > instead.
> > > Maybe there is a better solution?
> >
> > > On 19 Sep., 16:42, Eric Hauser <[EMAIL PROTECTED]> wrote:
> >
> > > > For a simple case like that, I would just use the criteria API and an
> > > > Expression.Sql() restriction.
> >
> > > >
> http://www.hibernate.org/hib_docs/nhibernate/1.2/reference/en/html/qu...
> >
> > > > On Sep 19, 7:57 am, burkhard_m <[EMAIL PROTECTED]>
> wrote:
> >
> > > > > Hi everyone!
> >
> > > > > I'm currently working on a small merchandise management tool and
> have
> > > > > to implement a full-text search for the article descriptions.Our
> > > > > project is based on NHibernate & ActiveRecord as well as MSSQL
> Server
> > > > > 2005 and we would prefer to use the indexing capability of the SQL
> > > > > Server rather than implementing NHibernate.Search with Lucene.NET.
> >
> > > > > I have read about several suggestions at Google Groups including
> > > > > Ayende Rahien's:
> > > > > "You need to create an derived dialect and register the contains
> > > > > function, if
> > > > > you want to use HQL. Or, you can create an ICritertion
> implementation
> > > > > that will deal with this."
> > > > > (seehttp://
> groups.google.com/group/nhusers/browse_thread/thread/e9745dafd...)
> >
> > > > > I tried hard for several days but I'm stuck. I have no idea how to
> > > > > implement this correctly.
> > > > > All I get is a QueryException telling me that I have a "Incorrect
> > > > > query syntax".
> >
> > > > > Yes, the Full text indexing is activated for the property 'Text'.
> > > > > The SQL-Query works:
> > > > > SELECT * FROM [dbo].[T_Descriptions]
> > > > > WHERE CONTAINS(Text, ' "T*" ')
> >
> > > > > The HQL-Query "FROM Description d WHERE d.Text LIKE 'T%'" also
> works
> > > > > fine.
> >
> > > > > Would anyone help me, please?
> > > > > Maybe you could tell me what I have done wrong from the following
> > > > > code?
> >
> > > > > Thanks a lot!
> >
> > > > > Best regards,
> > > > > Martin
> >
> > > > > // The config section
> >
> > > > > <activerecord isWeb="false">
> > > > > <config>
> > > > > <add key="hibernate.connection.driver_class"
> > > > > value="NHibernate.Driver.SqlClientDriver" />
> > > > > <add key="hibernate.dialect" value="SQLServerDialectWithFTS,
> > > > > <AssemblyName>" />
> > > > > <add key="hibernate.connection.provider"
> > > > > value="NHibernate.Connection.DriverConnectionProvider" />
> > > > > <add key="hibernate.max_fetch_depth" value="3"></add>
> > > > > <add key="hibernate.connection.connection_string"
> > > > > value="ConnectionString = ${ourConnectionString}" />
> > > > > </config>
> > > > > </activerecord>
> >
> > > > > // The model
> >
> > > > > [ActiveRecord("[T_Descriptions]")]
> > > > > [Serializable]
> > > > > public class Description : ActiveRecordBase<Description>
> > > > > {
> > > > > protected Description() {}
> >
> > > > > protected Description(string text) : this()
> > > > > {
> > > > > Text = text;
> > > > > }
> >
> > > > > [PrimaryKey]
> > > > > public long Id { get; set; }
> >
> > > > > [Property]
> > > > > public string Text { get; set; }
> > > > > }
> >
> > > > > // The customized dialect
> >
> > > > > public class SQLServerDialectWithFTS : MsSql2005Dialect
> > > > > {
> > > > > public SQLServerDialectWithFTS()
> > > > > {
> > > > > RegisterFunction("CONTAINS", new
> > > > > StandardSQLFunction("CONTAINS", NHibernateUtil.String));
> > > > > }
> > > > > }
> >
> > > > > // The search
> >
> > > > > IConfigurationSource source =
> ActiveRecordSectionHandler.Instance;
> >
> > > > >
> Castle.ActiveRecord.ActiveRecordStarter.Initialize(typeof(Description).Asse
> mbly,
> > > > > source);
> >
> > > > > using(SessionScope scope = new SessionScope())
> > > > > {
> > > > > var sq = new SimpleQuery<Description>(typeof (Description),
> > > > > "FROM Description d
> WHERE
> > > > > CONTAINS(d.Text, ' \"T*\" ')");
> > > > > var res = sq.Execute();
> > > > > }- Zitierten Text ausblenden -
> >
> > > > - Zitierten Text anzeigen -- Zitierten Text ausblenden -
> >
> > - Zitierten Text anzeigen -
> >
>
--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"Castle Project Users" group.
To post to this group, send email to [email protected]
To unsubscribe from this group, send email to [EMAIL PROTECTED]
For more options, visit this group at
http://groups.google.com/group/castle-project-users?hl=en
-~----------~----~----~----~------~----~------~--~---
