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<h2 class="title" style="clear: both"><a id="dbset_msgpfx"></a>
<span>Db::set_msgpfx()</span>
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<pre class="programlisting">#include <db_cxx.h>
void Db::set_msgpfx(const char *msgpfx); </pre>
<p>
Set the prefix string that appears before informational messages
issued by Berkeley DB. The length of this string can be no longer
than 200.
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<p>
The <code class="methodname">Db::set_msgpfx()</code> and
<a class="xref" href="envset_msgpfx.html" title="DbEnv::set_msgpfx()">
<span>DbEnv::set_msgpfx()</span>
</a>
methods do not copy the memory to which the <span class="bold"><strong>msgpfx</strong></span> parameter refers; rather, they maintain
a reference to it. Although this allows applications to modify the
informational message prefix at any time (without repeatedly calling the
interfaces), it means the memory must be maintained until the handle
is closed.
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For <a class="link" href="db.html" title="Chapter 2. The Db Handle">Db</a> handles opened
inside of Berkeley DB environments, calling the <code class="methodname">Db::set_msgpfx()</code>
method affects the entire environment and is equivalent to calling the
<a class="xref" href="envset_msgpfx.html" title="DbEnv::set_msgpfx()">
<span>DbEnv::set_msgpfx()</span>
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method.
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<p>
The <code class="methodname">Db::set_msgpfx()</code> method configures
operations performed using the specified
<a class="link" href="db.html" title="Chapter 2. The Db Handle">Db</a> handle, not all operations
performed on the underlying database.
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The <code class="methodname">Db::set_msgpfx()</code> method may be
called at any time during the life of the application.
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<h4 class="title"><a id="idm139755618044672"></a>msgpfx</h4>
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<p>
The <span class="bold"><strong>msgpfx</strong></span> parameter is
the application-specified informational prefix for
additional informational messages.
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<a class="link" href="db.html" title="Chapter 2. The Db Handle">Db</a>
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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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