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<!--$Id: db_rename.so,v 10.7 2000/10/25 15:24:44 dda Exp $-->
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<title>Berkeley DB: Db.rename</title>
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<h1>Db.rename</h1>
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<h3><pre>
import com.sleepycat.db.*;
import java.io.FileNotFoundException;
<p>
public void rename(String file, String database, String newname, int flags)
throws DbException, FileNotFoundException;
</pre></h3>
<h1>Description</h1>
<p>The Db.rename interface renames the database specified by the
<b>file</b> and <b>database</b> arguments to <b>newname</b>. If no
<b>database</b> is specified, the physical file represented by
<b>file</b> is renamed, incidentally renaming all databases that it
contained.
<p>If a physical file is being renamed and logging is currently enabled in
the database environment, no database in the file may be open when the
Db.rename method is called. Otherwise, no reference count of database
use is maintained by Berkeley DB. Applications should not rename databases that
are currently in use. In particular, some architectures do not permit
renaming files with open handles. On these architectures, attempts to
rename databases that are currently in use will fail.
<p>The <b>flags</b> parameter is currently unused, and must be set to 0.
<p>Once Db.rename has been called, regardless of its return, the
<a href="../api_java/db_class.html">Db</a> handle may not be accessed again.
<p>The Db.rename method throws an exception that encapsulates a non-zero error value on
failure.
<h1>Environment Variables</h1>
<p><dl compact>
<p><dt>DB_HOME<dd>If the <b>dbenv</b> argument to <a href="../api_c/db_create.html">db_create</a> was initialized using
<a href="../api_java/env_open.html">DbEnv.open</a> the environment variable <b>DB_HOME</b> may be used
as the path of the database environment home. Specifically, Db.rename
is affected by the configuration value DB_DATA_DIR.
</dl>
<h1>Errors</h1>
<p>The Db.rename method may fail and throw an exception encapsulating a non-zero error for the following conditions:
<p><dl compact>
<p><dt>EINVAL<dd>A database in the file is currently open.
</dl>
<p>If the file or directory does not exist, the Db.rename method will
fail and
throw a FileNotFoundException exception.
<p>The Db.rename method may fail and throw an exception for errors specified for other Berkeley DB and C library or system methods.
If a catastrophic error has occurred, the Db.rename method may fail and throw
a <a href="../api_java/runrec_class.html">DbRunRecoveryException</a>, in which case all subsequent Berkeley DB calls
will fail in the same way.
<h3>Class</h3>
<a href="../api_java/db_class.html">Db</a>
<h1>See Also</h1>
<a href="../api_java/db_close.html">Db.close</a>,
<a href="../api_java/db_cursor.html">Db.cursor</a>,
<a href="../api_java/db_del.html">Db.del</a>,
<a href="../api_java/db_fd.html">Db.fd</a>,
<a href="../api_java/db_get.html">Db.get</a>,
<a href="../api_java/db_get_byteswapped.html">Db.get_byteswapped</a>,
<a href="../api_java/db_get_type.html">Db.get_type</a>,
<a href="../api_java/db_join.html">Db.join</a>,
<a href="../api_java/db_key_range.html">Db.key_range</a>,
<a href="../api_java/db_open.html">Db.open</a>,
<a href="../api_java/db_put.html">Db.put</a>,
<a href="../api_java/db_remove.html">Db.remove</a>,
<a href="../api_java/db_set_bt_minkey.html">Db.set_bt_minkey</a>,
<a href="../api_java/db_set_cachesize.html">Db.set_cachesize</a>,
<a href="../api_java/db_set_errcall.html">Db.set_errcall</a>,
<a href="../api_java/db_set_errpfx.html">Db.set_errpfx</a>,
<a href="../api_java/db_set_flags.html">Db.set_flags</a>,
<a href="../api_java/db_set_h_ffactor.html">Db.set_h_ffactor</a>,
<a href="../api_java/db_set_h_nelem.html">Db.set_h_nelem</a>,
<a href="../api_java/db_set_lorder.html">Db.set_lorder</a>,
<a href="../api_java/db_set_pagesize.html">Db.set_pagesize</a>,
<a href="../api_java/db_set_q_extentsize.html">Db.set_q_extentsize</a>,
<a href="../api_java/db_set_re_delim.html">Db.set_re_delim</a>,
<a href="../api_java/db_set_re_len.html">Db.set_re_len</a>,
<a href="../api_java/db_set_re_pad.html">Db.set_re_pad</a>,
<a href="../api_java/db_set_re_source.html">Db.set_re_source</a>,
<a href="../api_java/db_stat.html">Db.stat</a>,
<a href="../api_java/db_sync.html">Db.sync</a>,
<a href="../api_java/db_upgrade.html">Db.upgrade</a>
and
<a href="../api_java/db_verify.html">Db.verify</a>.
</tt>
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