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<div class="sect1" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h2 class="title" style="clear: both"><a id="dbremove"></a>Db::remove()</h2>
</div>
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</div>
<pre class="programlisting">#include <db_cxx.h>
int
Db::remove(const char *file, const char *database, u_int32_t flags);</pre>
<p>
The <code class="methodname">Db::remove()</code> method removes the database specified by the
<span class="bold"><strong>file</strong></span> and <span class="bold"><strong>database</strong></span> parameters. If no <span class="bold"><strong>database</strong></span> is specified, the underlying file
represented by <span class="bold"><strong>file</strong></span> is removed,
incidentally removing all of the databases it contained.
</p>
<p>
Applications should never remove databases with open
<a class="link" href="db.html" title="Chapter 2. The Db Handle">Db</a> handles, or in the case of
removing a file, when any database in the file has an open handle.
For example, some architectures do not permit the removal of files
with open system handles. On these architectures, attempts to remove
databases currently in use by any thread of control in the system may
fail.
</p>
<p>
The <code class="methodname">Db::remove()</code> method should not be called if the remove is
intended to be transactionally safe; the
<a class="xref" href="envdbremove.html" title="DbEnv::dbremove()">DbEnv::dbremove()</a> method
should be used instead.
</p>
<p>
The <code class="methodname">Db::remove()</code> method may not be called after calling the
<a class="xref" href="dbopen.html" title="Db::open()">Db::open()</a> method on any
<a class="link" href="db.html" title="Chapter 2. The Db Handle">Db</a> handle. If the
<a class="xref" href="dbopen.html" title="Db::open()">Db::open()</a> method has already
been called on a <a class="link" href="db.html" title="Chapter 2. The Db Handle">Db</a>
handle, close the existing handle and create a new one before calling
<code class="methodname">Db::remove.
()</code> </p>
<p>
The <a class="link" href="db.html" title="Chapter 2. The Db Handle">Db</a> handle may not be
accessed again after <code class="methodname">Db::remove()</code> is called, regardless of its
return.
</p>
<p>
The <code class="methodname">Db::remove()</code> <span>
<span>
method either returns a non-zero error value or throws an
exception that encapsulates a non-zero error value on
failure, and returns 0 on success.
</span>
</span>
</p>
<div class="sect2" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h3 class="title"><a id="idp2306248"></a>Parameters</h3>
</div>
</div>
</div>
<div class="sect3" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h4 class="title"><a id="idm209328"></a>file</h4>
</div>
</div>
</div>
<p>
The <span class="bold"><strong>file</strong></span> parameter is the physical
file which contains the database(s) to be removed.
</p>
</div>
<div class="sect3" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h4 class="title"><a id="idm569920"></a>database</h4>
</div>
</div>
</div>
<p>
The <span class="bold"><strong>database</strong></span> parameter is the
database to be removed.
</p>
</div>
<div class="sect3" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h4 class="title"><a id="idp672176"></a>flags</h4>
</div>
</div>
</div>
<p>
The <span class="bold"><strong>flags</strong></span> parameter is currently unused, and must
be set to 0.
</p>
</div>
</div>
<div class="sect2" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h3 class="title"><a id="idm542280"></a>Environment Variables</h3>
</div>
</div>
</div>
<p>
If the database was opened within a database environment, the
environment variable <code class="literal">DB_HOME</code> may be used as the path of the
database environment home.
</p>
<p>
<code class="methodname">Db::remove()</code> is affected by any database directory specified using the
<a class="xref" href="envset_data_dir.html" title="DbEnv::set_data_dir()">DbEnv::set_data_dir()</a>
method, or by setting the "set_data_dir" string
in the environment's <a href="../../programmer_reference/env_db_config.html#env_db_config.DB_CONFIG" class="olink">DB_CONFIG</a> file.
</p>
</div>
<div class="sect2" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h3 class="title"><a id="idm716624"></a>Errors</h3>
</div>
</div>
</div>
<p>
The <code class="methodname">Db::remove()</code> <span>
<span>
method may fail and throw a <a class="link" href="dbexception.html" title="Chapter 6. The DbException Class">DbException</a>
exception, encapsulating one of the following non-zero errors, or return one
of the following non-zero errors:
</span>
</span>
</p>
<div class="sect3" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h4 class="title"><a id="idm1187920"></a>EINVAL</h4>
</div>
</div>
</div>
<p>
If the method was called after <a class="xref" href="dbopen.html" title="Db::open()">Db::open()</a>
was called; or if an invalid flag value or parameter was specified.
</p>
</div>
<div class="sect3" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h4 class="title"><a id="idm612624"></a>ENOENT</h4>
</div>
</div>
</div>
<p>
The file or directory does not exist.
</p>
</div>
</div>
<div class="sect2" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h3 class="title"><a id="idp137624"></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="idm779544"></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>
</p>
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