<?xml version="1.0" encoding="UTF-8" standalone="no"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> <title>Chapter 3. The Dbc Handle</title> <link rel="stylesheet" href="apiReference.css" type="text/css" /> <meta name="generator" content="DocBook XSL Stylesheets V1.73.2" /> <link rel="start" href="index.html" title="Berkeley DB C++ API Reference" /> <link rel="up" href="index.html" title="Berkeley DB C++ API Reference" /> <link rel="prev" href="db_heap_rid.html" title="DbHeapRecordId" /> <link rel="next" href="dbcursor.html" title="Db::cursor()" /> </head> <body> <div xmlns="" class="navheader"> <div class="libver"> <p>Library Version 11.2.5.3</p> </div> <table width="100%" summary="Navigation header"> <tr> <th colspan="3" align="center">Chapter 3. The Dbc Handle </th> </tr> <tr> <td width="20%" align="left"><a accesskey="p" href="db_heap_rid.html">Prev</a> </td> <th width="60%" align="center"> </th> <td width="20%" align="right"> <a accesskey="n" href="dbcursor.html">Next</a></td> </tr> </table> <hr /> </div> <div class="chapter" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h2 class="title"><a id="dbc"></a>Chapter 3. The Dbc Handle </h2> </div> </div> </div> <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. </p> <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. </p> <div class="sect1" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h2 class="title" style="clear: both"><a id="dbclist"></a>Database Cursors and Related Methods</h2> </div> </div> </div> <div class="navtable"> <table border="1" width="80%"> <thead> <tr> <th>Database Cursors and Related Methods</th> <th>Description</th> </tr> </thead> <tbody> <tr> <td> <a class="xref" href="dbcursor.html" title="Db::cursor()">Db::cursor()</a> </td> <td>Create a cursor handle</td> </tr> <tr> <td> <a class="xref" href="dbcclose.html" title="Dbc::close()">Dbc::close()</a> </td> <td>Close a cursor handle</td> </tr> <tr> <td> <a class="xref" href="dbccmp.html" title="Dbc::cmp()">Dbc::cmp()</a> </td> <td>Compare two cursors for equality.</td> </tr> <tr> <td> <a class="xref" href="dbccount.html" title="Dbc::count()">Dbc::count()</a> </td> <td>Return count of duplicates for current key</td> </tr> <tr> <td> <a class="xref" href="dbcdel.html" title="Dbc::del()">Dbc::del()</a> </td> <td>Delete current key/data pair</td> </tr> <tr> <td> <a class="xref" href="dbcdup.html" title="Dbc::dup()">Dbc::dup()</a> </td> <td>Duplicate the cursor handle</td> </tr> <tr> <td> <a class="xref" href="dbcget.html" title="Dbc::get()">Dbc::get()</a> </td> <td>Retrieve by cursor</td> </tr> <tr> <td> <a class="xref" href="dbcput.html" title="Dbc::put()">Dbc::put()</a> </td> <td>Store by cursor</td> </tr> <tr> <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> </tr> </tbody> </table> </div> </div> </div> <div class="navfooter"> <hr /> <table width="100%" summary="Navigation footer"> <tr> <td width="40%" align="left"><a accesskey="p" href="db_heap_rid.html">Prev</a> </td> <td width="20%" align="center"> </td> <td width="40%" align="right"> <a accesskey="n" href="dbcursor.html">Next</a></td> </tr> <tr> <td width="40%" align="left" valign="top">DbHeapRecordId </td> <td width="20%" align="center"> <a accesskey="h" href="index.html">Home</a> </td> <td width="40%" align="right" valign="top"> Db::cursor()</td> </tr> </table> </div> </body> </html>