<!--$Id: db_remove.so,v 10.20 2000/10/25 15:24:44 dda Exp $--> <!--Copyright 1997, 1998, 1999, 2000 by Sleepycat Software, Inc.--> <!--All rights reserved.--> <html> <head> <title>Berkeley DB: Db.remove</title> <meta name="description" content="Berkeley DB: An embedded database programmatic toolkit."> <meta name="keywords" content="embedded,database,programmatic,toolkit,b+tree,btree,hash,hashing,transaction,transactions,locking,logging,access method,access methods,java,C,C++"> </head> <body bgcolor=white> <a name="2"><!--meow--></a> <table><tr valign=top> <td> <h1>Db.remove</h1> </td> <td width="1%"> <a href="../api_java/java_index.html"><img src="../images/api.gif" alt="API"></a><a href="../ref/toc.html"><img src="../images/ref.gif" alt="Ref"></a> </td></tr></table> <hr size=1 noshade> <tt> <h3><pre> import com.sleepycat.db.*; import java.io.FileNotFoundException; <p> public void remove(String file, String database, int flags) throws DbException, FileNotFoundException; </pre></h3> <h1>Description</h1> <p>The Db.remove interface removes the database specified by the <b>file</b> and <b>database</b> arguments. If no <b>database</b> is specified, the physical file represented by <b>file</b> is removed, incidentally removing all databases that it contained. <p>If a physical file is being removed and logging is currently enabled in the database environment, no database in the file may be open when the Db.remove method is called. Otherwise, no reference count of database use is maintained by Berkeley DB. Applications should not remove databases that are currently in use. In particular, some architectures do not permit the removal of files with open handles. On these architectures, attempts to remove 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.remove 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.remove 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.remove is affected by the configuration value DB_DATA_DIR. </dl> <h1>Errors</h1> <p>The Db.remove 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.remove method will fail and throw a FileNotFoundException exception. <p>The Db.remove 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.remove 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> <table><tr><td><br></td><td width="1%"> <a href="../api_java/java_index.html"><img src="../images/api.gif" alt="API"></a><a href="../ref/toc.html"><img src="../images/ref.gif" alt="Ref"></a> </td></tr></table> <p><font size=1><a href="http://www.sleepycat.com">Copyright Sleepycat Software</a></font> </body> </html>