Gecko [ 122.154.134.11 ]

Name	Size	Permission
close.html	2.46 KB	-rw-r--r--
cxx.html	2 KB	-rw-r--r--
db.html	2.99 KB	-rw-r--r--
db_cxx.html	3.08 KB	-rw-r--r--
dbenv.html	4.91 KB	-rw-r--r--
dbenv_cxx.html	3.47 KB	-rw-r--r--
dbinfo.html	5.05 KB	-rw-r--r--
disk.html	2 KB	-rw-r--r--
eacces.html	1.83 KB	-rw-r--r--
eagain.html	2.22 KB	-rw-r--r--
envopen.html	8.38 KB	-rw-r--r--
func.html	3.42 KB	-rw-r--r--
intro.html	1.63 KB	-rw-r--r--
java.html	2.21 KB	-rw-r--r--
join.html	1.91 KB	-rw-r--r--
jump_set.html	3.75 KB	-rw-r--r--
lock_detect.html	1.63 KB	-rw-r--r--
lock_notheld.html	1.79 KB	-rw-r--r--
lock_put.html	1.67 KB	-rw-r--r--
lock_stat.html	1.6 KB	-rw-r--r--
log_register.html	1.63 KB	-rw-r--r--
log_stat.html	1.53 KB	-rw-r--r--
memp_stat.html	1.67 KB	-rw-r--r--
open.html	3.68 KB	-rw-r--r--
rmw.html	2.17 KB	-rw-r--r--
stat.html	1.58 KB	-rw-r--r--
toc.html	2.96 KB	-rw-r--r--
txn_begin.html	1.62 KB	-rw-r--r--
txn_commit.html	1.62 KB	-rw-r--r--
txn_stat.html	1.52 KB	-rw-r--r--
value_set.html	2.9 KB	-rw-r--r--
xa.html	2.39 KB	-rw-r--r--

Code Editor : db_cxx.html

<html>
<head>
<title>Berkeley DB Reference Guide: Release 3.0: the Db class for C++ and Java</title>
<meta name="description" content="Berkeley DB: An embedded database programmatic toolkit.">
<meta name="keywords" content="embedded,database,programmatic,toolkit,btree,hash,hashing,transaction,transactions,locking,logging,access method,access methods,Java,C,C++">
</head>
<body bgcolor=white>
<table width="100%"><tr valign=top>
<td><dl><dt>Berkeley DB Reference Guide:<dd>Upgrading Berkeley DB Applications</dl></td>
<td align=right><a href="../upgrade.3.0/dbenv_cxx.html"><img src="../../images/prev.gif" alt="Prev"></a><a href="../toc.html"><img src="../../images/ref.gif" alt="Ref"></a><a href="../upgrade.3.0/cxx.html"><img src="../../images/next.gif" alt="Next"></a>
</td></tr></table>
Release 3.0: the Db class for C++ and Java
The static Db::open method and the DbInfo class have been removed in the
Berkeley DB 3.0 release. The way to open a database file is to use the new Db
constructor with two arguments, followed by set_XXX methods to configure
the Db object, and finally a call to the new (nonstatic) Db::open(). In
comparing the Berkeley DB 3.0 release open method with the 2.X static open
method, the second argument is new. It is a database name, which can
be null. The DbEnv argument has been removed, as the environment is now
specified in the constructor. The open method no longer returns a Db,
since it operates on one.
Here's a C++ example opening a Berkeley DB database using the 2.X interface:
<blockquote><pre>// Note: by default, errors are thrown as exceptions
Db *table;
Db::open("lookup.db", DB_BTREE, DB_CREATE, 0644, dbenv, 0, &table);</pre></blockquote>
In the Berkeley DB 3.0 release, this code would be written as:
<blockquote><pre>// Note: by default, errors are thrown as exceptions
Db *table = new Db(dbenv, 0);
table-&gt;open("lookup.db", NULL, DB_BTREE, DB_CREATE, 0644);</pre></blockquote>
Here's a Java example opening a Berkeley DB database using the 2.X interface:
<blockquote><pre>// Note: errors are thrown as exceptions
Db table = Db.open("lookup.db", Db.DB_BTREE, Db.DB_CREATE, 0644, dbenv, 0);</pre></blockquote>
In the Berkeley DB 3.0 release, this code would be written as:
<blockquote><pre>// Note: errors are thrown as exceptions
Db table = new Db(dbenv, 0);
table.open("lookup.db", null, Db.DB_BTREE, Db.DB_CREATE, 0644);</pre></blockquote>
Note that if the dbenv argument is null, the database will not exist
within an environment.
<table width="100%"><tr><td> </td><td align=right><a href="../upgrade.3.0/dbenv_cxx.html"><img src="../../images/prev.gif" alt="Prev"></a><a href="../toc.html"><img src="../../images/ref.gif" alt="Ref"></a><a href="../upgrade.3.0/cxx.html"><img src="../../images/next.gif" alt="Next"></a>
</td></tr></table>
Copyright (c) 1996,2008 Oracle. All rights reserved.
</body>
</html>

${this.title}

Code Editor : db_cxx.html