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The Dbc Handle
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<h2 class="title"><a id="dbc"></a>Chapter 3.
The Dbc Handle
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<p>
A Dbc object is a handle for a cursor into a Berkeley
DB database.
</p>
<p>
Dbc handles are not free-threaded. Cursor
handles may be shared by multiple threads if access is
serialized by the application.
</p>
<p>
You create a Dbc using the
<a class="xref" href="dbcursor.html" title="Db::cursor()">Db::cursor()</a>
method.
</p>
<p>
If the cursor is to be used to perform operations on behalf
of a transaction, the cursor must be opened and closed
within the context of that single transaction.
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<p>
Once <a class="xref" href="dbcclose.html" title="Dbc::close()">Dbc::close()</a> has
been called, the handle may not be accessed again,
regardless of the method's return.
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<h2 class="title" style="clear: both"><a id="dbclist"></a>Database Cursors and Related Methods</h2>
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<a class="xref" href="dbcursor.html" title="Db::cursor()">Db::cursor()</a>
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<td>Create a cursor handle</td>
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<td>
<a class="xref" href="dbcclose.html" title="Dbc::close()">Dbc::close()</a>
</td>
<td>Close a cursor handle</td>
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<td>
<a class="xref" href="dbccmp.html" title="Dbc::cmp()">Dbc::cmp()</a>
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<td>Compare two cursors for equality.</td>
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<a class="xref" href="dbccount.html" title="Dbc::count()">Dbc::count()</a>
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<td>Return count of duplicates for current key</td>
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<td>
<a class="xref" href="dbcdel.html" title="Dbc::del()">Dbc::del()</a>
</td>
<td>Delete current key/data pair</td>
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<td>
<a class="xref" href="dbcdup.html" title="Dbc::dup()">Dbc::dup()</a>
</td>
<td>Duplicate the cursor handle</td>
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<td>
<a class="xref" href="dbcget.html" title="Dbc::get()">Dbc::get()</a>
</td>
<td>Retrieve by cursor</td>
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<td>
<a class="xref" href="dbcput.html" title="Dbc::put()">Dbc::put()</a>
</td>
<td>Store by cursor</td>
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<td><a class="xref" href="dbcset_priority.html" title="Dbc::set_priority()">Dbc::set_priority()</a>, <a class="xref" href="dbcget_priority.html" title="Dbc::get_priority()">Dbc::get_priority()</a></td>
<td>Set/get the cursor's cache priority</td>
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