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db4o-doc-7.4-2.fc13.i686.rpm

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        <h1>No Field Evaluation</h1><div id="TOC"><div id="TOCinner"><span class="TOCtitle">Contents</span><div class="TOCcontents"><ul><li><a href ="#Advantage">Advantage</a></li><li><a href ="#Effect">Effect</a></li><li><a href ="#Alternate Strategies">Alternate Strategies</a></li></ul></li></ul></div></div></div>




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<p>.NET: </p>

<p><code>configuration.ObjectClass(clazz).ObjectField("field").QueryEvaluation(false)</code></p>

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<a name="Advantage"></a><h2>Advantage</h2>

<p>Improves performance by reducing query evaluation volume</p>

<a name="Effect"></a><h2>Effect</h2>

<p>All fields are evaluated by default. Use this
method to turn query evaluation off for specific fields, which are never used
in queries. This setting can help you to increase the querying performance by
reducing the evaluation task.</p>

<a name="Alternate Strategies"></a><h2>Alternate Strategies</h2>

<p>Consider marking fields as
<a href="../selective_persistence.html" class="wikiLink">transient</a> if their persistence is not necessary.</p>

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					This revision (2) was last Modified 2007-05-07T16:43:41 by Tetyana.
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