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145 lines
5.5 KiB
HTML
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<title>DB->get_partition_callback()</title>
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<p>Library Version 11.2.5.3</p>
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<table width="100%" summary="Navigation header">
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<tr>
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<th colspan="3" align="center">DB->get_partition_callback()</th>
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<tr>
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<td width="20%" align="left"><a accesskey="p" href="dbget_open_flags.html">Prev</a> </td>
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<th width="60%" align="center">Chapter 2.
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The DB Handle
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</th>
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<td width="20%" align="right"> <a accesskey="n" href="dbget_partition_dirs.html">Next</a></td>
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<div class="sect1" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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<h2 class="title" style="clear: both"><a id="dbget_partition_callback"></a>DB->get_partition_callback()</h2>
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</div>
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</div>
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</div>
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<pre class="programlisting">#include <db.h>
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int
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DB->get_partition_callback(DB *db, u_int32_t *partsp,
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u_int32_t (**callback_fcn) (DB *dbp, DBT *key); </pre>
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<p>
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The <code class="methodname">DB->get_partition_callback()</code> method returns the partitioning information as
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set by the <a class="xref" href="dbset_partition.html" title="DB->set_partition()">DB->set_partition()</a> method.
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</p>
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<p>
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The <code class="methodname">DB->get_partition_callback()</code> method may be called at any time during the life
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of the application.
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</p>
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<p>
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The <code class="methodname">DB->get_partition_callback()</code> <span>
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<span>
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method returns a non-zero error value on failure and 0 on success.
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</span>
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</span>
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</p>
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<div class="sect2" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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<h3 class="title"><a id="idp57718264"></a>Parameters</h3>
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</div>
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</div>
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</div>
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<div class="sect3" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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<h4 class="title"><a id="idp57717616"></a>partsp</h4>
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</div>
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</div>
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</div>
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<p>
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The
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<code class="methodname">DB->get_partition_callback()</code>
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method returns number of partitions in the
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<span class="bold"><strong>partsp</strong></span>
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parameter.
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</p>
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</div>
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<div class="sect3" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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<h4 class="title"><a id="idp57696536"></a>callback_fcn</h4>
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</div>
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</div>
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</div>
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<p>
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The <span class="bold"><strong>callback_fcn</strong></span> parameter will be set to the partitioning function.
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</p>
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</div>
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</div>
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<div class="sect2" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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<h3 class="title"><a id="idp57709320"></a>Class</h3>
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</div>
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</div>
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</div>
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<p>
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<a class="link" href="db.html" title="Chapter 2. The DB Handle">DB</a>
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</p>
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</div>
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<div class="sect2" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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<h3 class="title"><a id="idp57683160"></a>See Also</h3>
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</div>
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</div>
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</div>
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<p>
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<a class="xref" href="db.html#dblist" title="Database and Related Methods">Database and Related Methods</a>,
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<a class="xref" href="dbset_partition.html" title="DB->set_partition()">DB->set_partition()</a>
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</p>
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<a accesskey="u" href="db.html">Up</a>
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<td width="40%" align="right"> <a accesskey="n" href="dbget_partition_dirs.html">Next</a></td>
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<tr>
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<td width="40%" align="left" valign="top">DB->get_open_flags() </td>
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<td width="40%" align="right" valign="top"> DB->get_partition_dirs()</td>
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