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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>
void Db::set_errpfx(const char *errpfx); </pre>
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Set the prefix string that appears before error messages issued by
Berkeley DB.
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The <code class="methodname">Db::set_errpfx()</code> and
<a class="xref" href="envset_errpfx.html" title="DbEnv::set_errpfx()">DbEnv::set_errpfx()</a>
methods do not copy the memory to which the <span class="bold"><strong>errpfx</strong></span> parameter refers; rather, they maintain
a reference to it. Although this allows applications to modify the
error 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_errpfx()</code>
method affects the entire environment and is equivalent to calling the
<a class="xref" href="envset_errpfx.html" title="DbEnv::set_errpfx()">DbEnv::set_errpfx()</a>
method.
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The <code class="methodname">Db::set_errpfx()</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_errpfx()</code> method may be called at any time during the life
of the application.
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<h3 class="title"><a id="id1646801"></a>Parameters</h3>
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<h4 class="title"><a id="id1646700"></a>errpfx</h4>
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The <span class="bold"><strong>errpfx</strong></span> parameter is the
application-specified error prefix for additional error messages.
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