mirror of
https://github.com/berkeleydb/libdb.git
synced 2024-11-17 01:26:25 +00:00
282 lines
11 KiB
HTML
282 lines
11 KiB
HTML
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
|
||
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
|
||
<html xmlns="http://www.w3.org/1999/xhtml">
|
||
<head>
|
||
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
|
||
<title>DB_ENV->dbremove()</title>
|
||
<link rel="stylesheet" href="apiReference.css" type="text/css" />
|
||
<meta name="generator" content="DocBook XSL Stylesheets V1.73.2" />
|
||
<link rel="start" href="index.html" title="Berkeley DB C API Reference" />
|
||
<link rel="up" href="env.html" title="Chapter 5. The DB_ENV Handle" />
|
||
<link rel="prev" href="envcreate.html" title="db_env_create" />
|
||
<link rel="next" href="envdbrename.html" title="DB_ENV->dbrename()" />
|
||
</head>
|
||
<body>
|
||
<div xmlns="" class="navheader">
|
||
<div class="libver">
|
||
<p>Library Version 11.2.5.2</p>
|
||
</div>
|
||
<table width="100%" summary="Navigation header">
|
||
<tr>
|
||
<th colspan="3" align="center">DB_ENV->dbremove()</th>
|
||
</tr>
|
||
<tr>
|
||
<td width="20%" align="left"><a accesskey="p" href="envcreate.html">Prev</a> </td>
|
||
<th width="60%" align="center">Chapter 5.
|
||
The DB_ENV Handle
|
||
</th>
|
||
<td width="20%" align="right"> <a accesskey="n" href="envdbrename.html">Next</a></td>
|
||
</tr>
|
||
</table>
|
||
<hr />
|
||
</div>
|
||
<div class="sect1" lang="en" xml:lang="en">
|
||
<div class="titlepage">
|
||
<div>
|
||
<div>
|
||
<h2 class="title" style="clear: both"><a id="envdbremove"></a>DB_ENV->dbremove()</h2>
|
||
</div>
|
||
</div>
|
||
</div>
|
||
<pre class="programlisting">#include <db.h>
|
||
|
||
int
|
||
DB_ENV->dbremove(DB_ENV *dbenv, DB_TXN *txnid,
|
||
const char *file, const char *database, u_int32_t flags); </pre>
|
||
<p>
|
||
The <code class="methodname">DB_ENV->dbremove()</code> method removes the database specified by the
|
||
<span class="bold"><strong>file</strong></span> and <span class="bold"><strong>database</strong></span> parameters. If no <span class="bold"><strong>database</strong></span> is specified, the underlying file
|
||
represented by <span class="bold"><strong>file</strong></span> is removed,
|
||
incidentally removing all of the databases it contained.
|
||
</p>
|
||
<p>
|
||
Applications should never remove databases with open
|
||
<a class="link" href="db.html" title="Chapter 2. The DB Handle">DB</a> handles, or in the case of
|
||
removing a file, when any database in the file has an open handle.
|
||
</p>
|
||
<p>
|
||
The <code class="methodname">DB_ENV->dbremove()</code> <span>
|
||
<span>
|
||
method returns a non-zero error value on failure and 0 on success.
|
||
</span>
|
||
|
||
</span>
|
||
</p>
|
||
<p>
|
||
<code class="methodname">DB_ENV->dbremove()</code> is affected by any database directory specified using the
|
||
<a class="xref" href="envset_data_dir.html" title="DB_ENV->set_data_dir()">DB_ENV->set_data_dir()</a>
|
||
method, or by setting the <code class="literal">set_data_dir</code> string in the environment's
|
||
<a href="../../programmer_reference/env_db_config.html#env_db_config.DB_CONFIG" class="olink">DB_CONFIG</a> file.
|
||
</p>
|
||
<div class="sect2" lang="en" xml:lang="en">
|
||
<div class="titlepage">
|
||
<div>
|
||
<div>
|
||
<h3 class="title"><a id="id3704443"></a>Parameters</h3>
|
||
</div>
|
||
</div>
|
||
</div>
|
||
<div class="sect3" lang="en" xml:lang="en">
|
||
<div class="titlepage">
|
||
<div>
|
||
<div>
|
||
<h4 class="title"><a id="id3704447"></a>txnid</h4>
|
||
</div>
|
||
</div>
|
||
</div>
|
||
<p>
|
||
If the operation is part of an application-specified transaction, the
|
||
<span class="bold"><strong>txnid</strong></span> parameter is a transaction
|
||
handle returned from
|
||
<a class="xref" href="txnbegin.html" title="DB_ENV->txn_begin()">DB_ENV->txn_begin()</a>; if the
|
||
operation is part of a Berkeley DB Concurrent Data Store group, the
|
||
<span class="bold"><strong>txnid</strong></span> parameter is a handle returned
|
||
from <a class="xref" href="envcdsgroup_begin.html" title="DB_ENV->cdsgroup_begin()">DB_ENV->cdsgroup_begin()</a>;
|
||
otherwise NULL. If no transaction handle is specified, but the
|
||
<code class="literal">DB_AUTO_COMMIT</code> flag is specified to either this method
|
||
or the environment handle, the operation will be implicitly transaction protected.
|
||
</p>
|
||
</div>
|
||
<div class="sect3" lang="en" xml:lang="en">
|
||
<div class="titlepage">
|
||
<div>
|
||
<div>
|
||
<h4 class="title"><a id="id3704465"></a>file</h4>
|
||
</div>
|
||
</div>
|
||
</div>
|
||
<p>
|
||
The <span class="bold"><strong>file</strong></span> parameter is the physical
|
||
file which contains the database(s) to be removed.
|
||
</p>
|
||
</div>
|
||
<div class="sect3" lang="en" xml:lang="en">
|
||
<div class="titlepage">
|
||
<div>
|
||
<div>
|
||
<h4 class="title"><a id="id3704168"></a>database</h4>
|
||
</div>
|
||
</div>
|
||
</div>
|
||
<p>
|
||
The <span class="bold"><strong>database</strong></span> parameter is the
|
||
database to be removed.
|
||
</p>
|
||
</div>
|
||
<div class="sect3" lang="en" xml:lang="en">
|
||
<div class="titlepage">
|
||
<div>
|
||
<div>
|
||
<h4 class="title"><a id="id3704375"></a>flags</h4>
|
||
</div>
|
||
</div>
|
||
</div>
|
||
<p>
|
||
The <span class="bold"><strong>flags</strong></span> parameter must
|
||
be set to 0 or the following value:
|
||
</p>
|
||
<div class="itemizedlist">
|
||
<ul type="disc">
|
||
<li>
|
||
<p>
|
||
<code class="literal">DB_AUTO_COMMIT</code>
|
||
</p>
|
||
<p>
|
||
Enclose the <code class="classname">DB_ENV->dbremove()</code>
|
||
call within a transaction. If the call succeeds,
|
||
changes made by the operation will be recoverable.
|
||
If the call fails, the operation will have made no
|
||
changes.
|
||
</p>
|
||
</li>
|
||
</ul>
|
||
</div>
|
||
</div>
|
||
</div>
|
||
<div class="sect2" lang="en" xml:lang="en">
|
||
<div class="titlepage">
|
||
<div>
|
||
<div>
|
||
<h3 class="title"><a id="id3704319"></a>Environment Variables</h3>
|
||
</div>
|
||
</div>
|
||
</div>
|
||
<p>
|
||
The environment variable <code class="literal">DB_HOME</code> may be used as the path of
|
||
the database environment home.
|
||
</p>
|
||
</div>
|
||
<div class="sect2" lang="en" xml:lang="en">
|
||
<div class="titlepage">
|
||
<div>
|
||
<div>
|
||
<h3 class="title"><a id="id3704474"></a>Errors</h3>
|
||
</div>
|
||
</div>
|
||
</div>
|
||
<p>
|
||
The <code class="methodname">DB_ENV->dbremove()</code> <span>
|
||
<span>
|
||
method may fail and return one of the following non-zero errors:
|
||
</span>
|
||
|
||
</span>
|
||
</p>
|
||
<div class="sect3" lang="en" xml:lang="en">
|
||
<div class="titlepage">
|
||
<div>
|
||
<div>
|
||
<h4 class="title"><a id="id3704661"></a>DB_LOCK_DEADLOCK</h4>
|
||
</div>
|
||
</div>
|
||
</div>
|
||
<p>
|
||
A transactional database environment operation was selected to resolve
|
||
a deadlock.
|
||
</p>
|
||
</div>
|
||
<div class="sect3" lang="en" xml:lang="en">
|
||
<div class="titlepage">
|
||
<div>
|
||
<div>
|
||
<h4 class="title"><a id="id3704036"></a>DB_LOCK_NOTGRANTED</h4>
|
||
</div>
|
||
</div>
|
||
</div>
|
||
<p>
|
||
A Berkeley DB Concurrent Data Store database environment configured
|
||
for lock timeouts was unable to grant a lock in the allowed time.
|
||
</p>
|
||
</div>
|
||
<div class="sect3" lang="en" xml:lang="en">
|
||
<div class="titlepage">
|
||
<div>
|
||
<div>
|
||
<h4 class="title"><a id="id3704121"></a>EINVAL</h4>
|
||
</div>
|
||
</div>
|
||
</div>
|
||
<p>
|
||
If the method was called before <a class="xref" href="envopen.html" title="DB_ENV->open()">DB_ENV->open()</a>
|
||
was called; or if an invalid flag value or parameter was specified.
|
||
</p>
|
||
</div>
|
||
<div class="sect3" lang="en" xml:lang="en">
|
||
<div class="titlepage">
|
||
<div>
|
||
<div>
|
||
<h4 class="title"><a id="id3704681"></a>ENOENT</h4>
|
||
</div>
|
||
</div>
|
||
</div>
|
||
<p>
|
||
The file or directory does not exist.
|
||
</p>
|
||
</div>
|
||
</div>
|
||
<div class="sect2" lang="en" xml:lang="en">
|
||
<div class="titlepage">
|
||
<div>
|
||
<div>
|
||
<h3 class="title"><a id="id3704629"></a>Class</h3>
|
||
</div>
|
||
</div>
|
||
</div>
|
||
<p>
|
||
<a class="link" href="env.html" title="Chapter 5. The DB_ENV Handle">DB_ENV</a>
|
||
</p>
|
||
</div>
|
||
<div class="sect2" lang="en" xml:lang="en">
|
||
<div class="titlepage">
|
||
<div>
|
||
<div>
|
||
<h3 class="title"><a id="id3704699"></a>See Also</h3>
|
||
</div>
|
||
</div>
|
||
</div>
|
||
<p>
|
||
<a class="xref" href="env.html#envlist" title="Database Environments and Related Methods">Database Environments and Related Methods</a>
|
||
</p>
|
||
</div>
|
||
</div>
|
||
<div class="navfooter">
|
||
<hr />
|
||
<table width="100%" summary="Navigation footer">
|
||
<tr>
|
||
<td width="40%" align="left"><a accesskey="p" href="envcreate.html">Prev</a> </td>
|
||
<td width="20%" align="center">
|
||
<a accesskey="u" href="env.html">Up</a>
|
||
</td>
|
||
<td width="40%" align="right"> <a accesskey="n" href="envdbrename.html">Next</a></td>
|
||
</tr>
|
||
<tr>
|
||
<td width="40%" align="left" valign="top">db_env_create </td>
|
||
<td width="20%" align="center">
|
||
<a accesskey="h" href="index.html">Home</a>
|
||
</td>
|
||
<td width="40%" align="right" valign="top"> DB_ENV->dbrename()</td>
|
||
</tr>
|
||
</table>
|
||
</div>
|
||
</body>
|
||
</html>
|