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    <p>It depends on your willingness to maintain search objects. Performance wise the indexed view is the best option and any DBA would recommend that solution. However <a href="http://incubator.apache.org/lucene.net/" rel="nofollow noreferrer">Lucene.net</a> was ported from java to meet at least some of your requirements. There are a few <a href="http://blogs.intesoft.net/post/2008/03/NHibernateSearch-using-Lucene-NET-Full-Text-Index-Part1.aspx" rel="nofollow noreferrer">blog series</a> about lucene and <a href="http://tekpub.com/" rel="nofollow noreferrer">tekpub</a> has a <a href="http://tekpub.com/view/nhibernate/8" rel="nofollow noreferrer">whole episode about searching</a>.</p> <p>Personally I have not used NHibernate Search for anything advanced so I am not sure it will meet your requirements completely. It could be worth having a look at though. If you want my recommendation then the indexed view. It's darn quick to get up and running!</p> <p><strong>EDIT:</strong> I would chose either the brand new QueryOver api or Criteria. You will most certainly run into some limitations if you are using the "NHibernate Contrib" Linq provider. It's just 80% compatible but you can do amazing things with <a href="http://ayende.com/Blog/2006/12/07/ComplexSearchingQueryingWithNHibernate.aspx" rel="nofollow noreferrer">Criteria</a> and QueryOver. If you read ayendes post you can easily convert that to QueryOver for some compile time checking instead of the magic strings if that bothers you. </p>
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    1. POsearching using fluent nHibernate using LINQ where property may reside in numerious locations in derived classes
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    1. COThanks for swift response. This layer goes onto feed Endeca(enterprise search system) but we need to be able to find objects which aren't indexed yet. This leads to an extra layer of complexity for this area alone (due to the way in which the data is imputed) Has anyone performed a query this complex with linq?
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    2. COupdated with some more information, not sure about linq. The Linq provider from NH Contrib is not that strong with the search.
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    3. COThanks will watch vid tomorrow and report back - gotta love TekPub
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