Adding a SQLFunction that does not need to be compared to anything?
On Mon, Sep 22, 2008 at 5:30 PM, Ayende Rahien <[EMAIL PROTECTED]> wrote:
> Hm, that is a bug then, with NH.
> Please file a JIRA issue for this.
>
>
>
> On Mon, Sep 22, 2008 at 5:25 PM, burkhard_m <
> [EMAIL PROTECTED]> wrote:
>
>>
>> The answer is still the same:
>>
>> System.Data.SqlClient.SqlException: Incorrect syntax near '='.
>>
>> NHibernate: select descriptio0_.Id as Id0_, descriptio0_.Text as
>> Text0_ from [T_Descriptions] descriptio0_ where
>> (contains(descriptio0_.Text , @p0)=1 ); @p0 = '"Text*"'
>>
>>
>>
>> On 22 Sep., 15:34, "Ayende Rahien" <[EMAIL PROTECTED]> wrote:
>> > 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 -- Zitierten Text ausblenden -
>> >
>> > - Zitierten Text anzeigen -
>>
>>
>
> >
>
--
Ken Egozi.
http://www.kenegozi.com/blog
http://www.musicglue.com
http://www.castleproject.org
http://www.gotfriends.co.il
--~--~---------~--~----~------------~-------~--~----~
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
-~----------~----~----~----~------~----~------~--~---
