<?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>DB->get_partition_callback()</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="db.html" title="Chapter 2. The DB Handle" /> <link rel="prev" href="dbget_open_flags.html" title="DB->get_open_flags()" /> <link rel="next" href="dbget_partition_dirs.html" title="DB->get_partition_dirs()" /> </head> <body> <div class="navheader"> <table width="100%" summary="Navigation header"> <tr> <th colspan="3" align="center">DB->get_partition_callback()</th> </tr> <tr> <td width="20%" align="left"><a accesskey="p" href="dbget_open_flags.html">Prev</a> </td> <th width="60%" align="center">Chapter 2. The DB Handle </th> <td width="20%" align="right"> <a accesskey="n" href="dbget_partition_dirs.html">Next</a></td> </tr> </table> <hr /> </div> <div class="sect1" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h2 class="title" style="clear: both"><a id="dbget_partition_callback"></a>DB->get_partition_callback()</h2> </div> </div> </div> <pre class="programlisting">#include <db.h> int DB->get_partition_callback(DB *db, u_int32_t *partsp, u_int32_t (**callback_fcn) (DB *dbp, DBT *key); </pre> <p> The <code class="methodname">DB->get_partition_callback()</code> method returns the partitioning information as set by the <a class="xref" href="dbset_partition.html" title="DB->set_partition()">DB->set_partition()</a> method. </p> <p> The <code class="methodname">DB->get_partition_callback()</code> method may be called at any time during the life of the application. </p> <p> The <code class="methodname">DB->get_partition_callback()</code> <span> <span> method returns a non-zero error value on failure and 0 on success. </span> </span> </p> <div class="sect2" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h3 class="title"><a id="id1637153"></a>Parameters</h3> </div> </div> </div> <div class="sect3" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h4 class="title"><a id="id1637207"></a>partsp</h4> </div> </div> </div> <p> The <code class="methodname">DB->get_partition_callback()</code> method returns number of partitions in the <span class="bold"><strong>partsp</strong></span> parameter. </p> </div> <div class="sect3" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h4 class="title"><a id="id1637438"></a>callback_fcn</h4> </div> </div> </div> <p> The <span class="bold"><strong>callback_fcn</strong></span> parameter will be set to the partitioning function. </p> </div> </div> <div class="sect2" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h3 class="title"><a id="id1637442"></a>Class</h3> </div> </div> </div> <p> <a class="link" href="db.html" title="Chapter 2. The DB Handle">DB</a> </p> </div> <div class="sect2" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h3 class="title"><a id="id1637439"></a>See Also</h3> </div> </div> </div> <p> <a class="xref" href="db.html#dblist" title="Database and Related Methods">Database and Related Methods</a>, <a class="xref" href="dbset_partition.html" title="DB->set_partition()">DB->set_partition()</a> </p> </div> </div> <div class="navfooter"> <hr /> <table width="100%" summary="Navigation footer"> <tr> <td width="40%" align="left"><a accesskey="p" href="dbget_open_flags.html">Prev</a> </td> <td width="20%" align="center"> <a accesskey="u" href="db.html">Up</a> </td> <td width="40%" align="right"> <a accesskey="n" href="dbget_partition_dirs.html">Next</a></td> </tr> <tr> <td width="40%" align="left" valign="top">DB->get_open_flags() </td> <td width="20%" align="center"> <a accesskey="h" href="index.html">Home</a> </td> <td width="40%" align="right" valign="top"> DB->get_partition_dirs()</td> </tr> </table> </div> </body> </html>