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<h1>Native Query Implementation</h1>
<p>So how are Native Queries
realized in practice?</p>
<p>Let's return to the <a href="../native_query_concepts.html" class="wikiLink">Pilot</a> class.
Suppose we need to find all pilots with the name starting from "M" and points
over 100. In a native OO language it would be expressed as:</p>
<span name="cs_wiki_filter" csw_filters="cs"><p>c#: </p><p><code>pilot.Name.StartsWith("M")
&& pilot.Points > 100</code></p>
</span>In order to pass this condition to a database, collection or
other query processor a special object is used. In .NET2 it is a delegate, in
Java5 it is a named method.
<span name="cs_wiki_filter" csw_filters="cs"><p>c#: </p>
<p><code>delegate(Pilot pilot){</code></p>
<p><code> return pilot.Name.StartsWith("M")&& student.Points >
100; </code></p>
<p><code>}</code></p>
</span>
<p> </p>For more information about NQ implementations in the other
Java and .NET versions see
<a href="../../object_lifecycle/querying/native_queries/native_query_syntax.html" class="wikiLink">Native Query Syntax</a>.
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This revision (4) was last Modified 2007-06-04T17:25:45 by Tetyana.
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