1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
|
<!--$Id: dbc_del.html,v 1.1.1.1 2003/11/20 22:14:33 toshok Exp $-->
<!--Copyright 1997-2002 by Sleepycat Software, Inc.-->
<!--All rights reserved.-->
<!--See the file LICENSE for redistribution information.-->
<html>
<head>
<title>Berkeley DB: Dbc.del</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 width="100%"><tr valign=top>
<td>
<h1>Dbc.del</h1>
</td>
<td align=right>
<a href="../api_java/c_index.html"><img src="../images/api.gif" alt="API"></a><a href="../reftoc.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 int del(int flags)
throws DbException;
</pre></h3>
<h1>Description</h1>
<p>The Dbc.del method deletes the key/data pair to which the cursor
refers.
<p>When called on a cursor opened on a database that has been made into a
secondary index using the <a href="../api_java/db_associate.html">Db.associate</a> method, the <a href="../api_java/db_del.html">Db.del</a> method
deletes the key/data pair from the primary database and all secondary
indices.
<p>The <b>flags</b> parameter is currently unused, and must be set to 0.
<p>The cursor position is unchanged after a delete, and subsequent calls to
cursor functions expecting the cursor to refer to an existing key will
fail.
<p>
If the element has already been deleted, the Dbc.del method will return Db.DB_KEYEMPTY.
If the cursor is not yet initialized, the Dbc.del method throws an exception that encapsulates Db.EINVAL.
Otherwise, the Dbc.del method throws an exception that encapsulates a non-zero error value on
failure.
<h1>Errors</h1>
<p>The Dbc.del method may fail and throw an exception encapsulating a non-zero error for the following conditions:
<p><dl compact>
<p><dt>Db.DB_SECONDARY_BAD<dd>A secondary index references a nonexistent primary key.
</dl>
<p><dl compact>
<p><dt>EACCES<dd>An attempt was made to modify a read-only database.
</dl>
<p><dl compact>
<p><dt>EINVAL<dd>An invalid flag value or parameter was specified.
</dl>
<p><dl compact>
<p><dt>EPERM <dd>Write attempted on read-only cursor when the <a href="../api_java/env_open.html#DB_INIT_CDB">Db.DB_INIT_CDB</a> flag was
specified to <a href="../api_java/env_open.html">DbEnv.open</a>.
</dl>
<p>If the operation was selected to resolve a deadlock, the
Dbc.del method will fail and
throw a <a href="../api_java/deadlock_class.html">DbDeadlockException</a> exception.
<p>The Dbc.del 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.del 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.
<h1>Class</h1>
<a href="../api_java/dbc_class.html">Dbc</a>
<h1>See Also</h1>
<a href="../api_java/dbc_list.html">Database Cursors and Related Methods</a>
</tt>
<table width="100%"><tr><td><br></td><td align=right>
<a href="../api_java/c_index.html"><img src="../images/api.gif" alt="API"></a><a href="../reftoc.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>
|
