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+<!--$Id: dbc_dup.so,v 10.8 2000/03/17 01:53:58 bostic Exp $-->
+<!--Copyright 1997, 1998, 1999, 2000 by Sleepycat Software, Inc.-->
+<!--All rights reserved.-->
+<html>
+<head>
+<title>Berkeley DB: Dbc.dup</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>Dbc.dup</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.*;
+<p>
+public Dbc dup(int flags)
+	throws DbException;
+</pre></h3>
+<h1>Description</h1>
+<p>The Dbc.dup method creates a new cursor that uses the same transaction
+and locker ID as the original cursor.  This is useful when an application
+is using locking and requires two or more cursors in the same thread of
+control.
+<p>The <b>flags</b> value must be set to 0 or by bitwise inclusively <b>OR</b>'ing together one or more
+of the following values.
+<p><dl compact>
+<p><dt><a name="Db.DB_POSITION">Db.DB_POSITION</a><dd>The newly created cursor is initialized to reference the same position
+in the database as the original cursor and hold the same locks.  If the
+Db.DB_POSITION flag is not specified, then the created cursor is
+uninitialized and will behave like a cursor newly created using
+<a href="../api_java/db_cursor.html">Db.cursor</a>.
+</dl>
+<p>When using the Berkeley DB Concurrent Data Store product, there can be only one active write cursor
+at a time.  For this reason, attempting to duplicate a cursor for which
+the <a href="../api_java/db_cursor.html#DB_WRITECURSOR">Db.DB_WRITECURSOR</a> flag was specified during creation will return
+an error.
+<p>If the <b>cursor</b> argument is not yet initialized, the Dbc.dup method throws an exception that encapsulates EINVAL.
+<p>Otherwise, the Dbc.dup method throws an exception that encapsulates a non-zero error value on
+failure.
+<h1>Errors</h1>
+<p>The Dbc.dup method may fail and throw an exception encapsulating a non-zero error for the following conditions:
+<p><dl compact>
+<p><dt>EINVAL<dd>An invalid flag value or parameter was specified.
+<p>The <b>cursor</b> argument was created using the
+<a href="../api_java/db_cursor.html#DB_WRITECURSOR">Db.DB_WRITECURSOR</a> flag in the Berkeley DB Concurrent Data Store product.
+</dl>
+<p>The Dbc.dup 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 Dbc.dup 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/dbc_class.html">Dbc</a>
+<h1>See Also</h1>
+<a href="../api_java/dbc_close.html">Dbc.close</a>,
+<a href="../api_java/dbc_count.html">Dbc.count</a>,
+<a href="../api_java/dbc_del.html">Dbc.del</a>,
+<a href="../api_java/dbc_dup.html">Dbc.dup</a>,
+<a href="../api_java/dbc_get.html">Dbc.get</a>
+and
+<a href="../api_java/dbc_put.html">Dbc.put</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>