<html>
<head>
<META http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Drawbacks</title>
<link rel="stylesheet" type="text/css" href="../../../../style.css">
</head>
<body>
<div class="CommonContent">
<div class="CommonContentArea">
<h1>Drawbacks</h1>
<p>While evaluations offer you another degree of freedom for assembling queries, they come at a certain cost: As you may already have noticed from the example, evaluations work on the fully instantiated objects, while 'normal' queries peek into the database file directly. So there's a certain performance penaltyfor the object instantiation, which is wasted if the object is not included into the candidate set.</p>
<p>Another restriction is that, while 'normal' queries can bypass encapsulation and access candidates' private members directly, evaluations are bound to use their external API, just as in the language itself.</p>
</div>
</div>
<div id="footer">
This revision (4) was last Modified 2006-11-13T15:23:52 by Tetyana.
</div>
</body>
</html>
