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<concept id="GUID-5F3B814F-30B2-5325-A83F-A48ACCF095EB" xml:lang="en"><title>Database
compacting</title><shortdesc>Describes how to compact the database.</shortdesc><prolog><metadata><keywords/></metadata></prolog><conbody>
<p>When a File-store database is constructed using the <codeph>RDbNamedDatabase</codeph> interface,
there is no access to the underlying store in order to compact it and recover
any free space for re-use.</p>
<p>The <codeph>RDbDatabase</codeph> abstract base class, however, supports
a compacting interface, the <codeph>Compact()</codeph> member function. The
class also offers a complementary interface, the <codeph>UpdateStats()</codeph> and <codeph>Size()</codeph> member
functions, which calculate and report size and usage information.</p>
<p>Incremental forms of these functions are also offered by the <codeph>RDbIncremental</codeph> class.</p>
</conbody></concept>