2011-09-13 17:44:24 +00:00
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<title>Db::set_errpfx()</title>
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<p>Library Version 11.2.5.2</p>
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<th colspan="3" align="center">Db::set_errpfx()</th>
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<td width="20%" align="left"><a accesskey="p" href="dbset_error_stream.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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<h2 class="title" style="clear: both"><a id="dbset_errpfx"></a>Db::set_errpfx()</h2>
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<pre class="programlisting">#include <db_cxx.h>
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void Db::set_errpfx(const char *errpfx); </pre>
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<p>
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Set the prefix string that appears before error messages issued by
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Berkeley DB.
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</p>
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<p>
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The <code class="methodname">Db::set_errpfx()</code> and
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<a class="xref" href="envset_errpfx.html" title="DbEnv::set_errpfx()">DbEnv::set_errpfx()</a>
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methods do not copy the memory to which the <span class="bold"><strong>errpfx</strong></span> parameter refers; rather, they maintain
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a reference to it. Although this allows applications to modify the
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error message prefix at any time (without repeatedly calling the
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interfaces), it means the memory must be maintained until the handle
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is closed.
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</p>
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<p>
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For <a class="link" href="db.html" title="Chapter 2. The Db Handle">Db</a> handles opened
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inside of Berkeley DB environments, calling the <code class="methodname">Db::set_errpfx()</code>
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method affects the entire environment and is equivalent to calling the
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<a class="xref" href="envset_errpfx.html" title="DbEnv::set_errpfx()">DbEnv::set_errpfx()</a>
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method.
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</p>
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<p>
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The <code class="methodname">Db::set_errpfx()</code> method configures operations performed using the
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specified <a class="link" href="db.html" title="Chapter 2. The Db Handle">Db</a> handle, not
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all operations performed on the underlying database.
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</p>
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<p>
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The <code class="methodname">Db::set_errpfx()</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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<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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2011-12-20 00:07:10 +00:00
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<h3 class="title"><a id="id3575501"></a>Parameters</h3>
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2011-09-13 17:44:24 +00:00
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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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2011-12-20 00:07:10 +00:00
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<h4 class="title"><a id="id3575504"></a>errpfx</h4>
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2011-09-13 17:44:24 +00:00
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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>errpfx</strong></span> parameter is the
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application-specified error prefix for additional error messages.
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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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2011-12-20 00:07:10 +00:00
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<h3 class="title"><a id="id3575234"></a>Class</h3>
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2011-09-13 17:44:24 +00:00
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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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2011-12-20 00:07:10 +00:00
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<h3 class="title"><a id="id3575425"></a>See Also</h3>
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2011-09-13 17:44:24 +00:00
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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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</p>
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<a accesskey="u" href="db.html">Up</a>
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<td width="40%" align="left" valign="top">Db::set_error_stream() </td>
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