<?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->remove()</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="db.html" title="Chapter 2. The DB Handle" /> <link rel="prev" href="dbput.html" title="DB->put()" /> <link rel="next" href="dbrename.html" title="DB->rename()" /> </head> <body> <div xmlns="" class="navheader"> <div class="libver"> <p>Library Version 11.2.5.3</p> </div> <table width="100%" summary="Navigation header"> <tr> <th colspan="3" align="center">DB->remove()</th> </tr> <tr> <td width="20%" align="left"><a accesskey="p" href="dbput.html">Prev</a> </td> <th width="60%" align="center">Chapter 2. The DB Handle </th> <td width="20%" align="right"> <a accesskey="n" href="dbrename.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="dbremove"></a>DB->remove()</h2> </div> </div> </div> <pre class="programlisting">#include <db.h> int DB->remove(DB *db, const char *file, const char *database, u_int32_t flags); </pre> <p> The <code class="methodname">DB->remove()</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. For example, some architectures do not permit the removal of files with open system handles. On these architectures, attempts to remove databases currently in use by any thread of control in the system may fail. </p> <p> The <code class="methodname">DB->remove()</code> method should not be called if the remove is intended to be transactionally safe; the <a class="xref" href="envdbremove.html" title="DB_ENV->dbremove()">DB_ENV->dbremove()</a> method should be used instead. </p> <p> The <code class="methodname">DB->remove()</code> method may not be called after calling the <a class="xref" href="dbopen.html" title="DB->open()">DB->open()</a> method on any <a class="link" href="db.html" title="Chapter 2. The DB Handle">DB</a> handle. If the <a class="xref" href="dbopen.html" title="DB->open()">DB->open()</a> method has already been called on a <a class="link" href="db.html" title="Chapter 2. The DB Handle">DB</a> handle, close the existing handle and create a new one before calling <code class="methodname">DB->remove. ()</code> </p> <p> The <a class="link" href="db.html" title="Chapter 2. The DB Handle">DB</a> handle may not be accessed again after <code class="methodname">DB->remove()</code> is called, regardless of its return. </p> <p> The <code class="methodname">DB->remove()</code> <span> <span> method returns a non-zero error value on failure and 0 on success. </span> </span> </p> <div class="sect2" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h3 class="title"><a id="idp57945488"></a>Parameters</h3> </div> </div> </div> <div class="sect3" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h4 class="title"><a id="idp57945872"></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="idp57997496"></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="idp57962976"></a>flags</h4> </div> </div> </div> <p> The <span class="bold"><strong>flags</strong></span> parameter is currently unused, and must be set to 0. </p> </div> </div> <div class="sect2" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h3 class="title"><a id="idp57956744"></a>Environment Variables</h3> </div> </div> </div> <p> If the database was opened within a database environment, the environment variable <code class="literal">DB_HOME</code> may be used as the path of the database environment home. </p> <p> <code class="methodname">DB->remove()</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 "set_data_dir" 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> <div class="sect2" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h3 class="title"><a id="idp58001144"></a>Errors</h3> </div> </div> </div> <p> The <code class="methodname">DB->remove()</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="idp58005728"></a>EINVAL</h4> </div> </div> </div> <p> If the method was called after <a class="xref" href="dbopen.html" title="DB->open()">DB->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="idp58006584"></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="idp58004392"></a>Class</h3> </div> </div> </div> <p> <a class="link" href="db.html" title="Chapter 2. The DB Handle">DB</a> </p> </div> <div class="sect2" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h3 class="title"><a id="idp58007552"></a>See Also</h3> </div> </div> </div> <p> <a class="xref" href="db.html#dblist" title="Database and Related Methods">Database 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="dbput.html">Prev</a> </td> <td width="20%" align="center"> <a accesskey="u" href="db.html">Up</a> </td> <td width="40%" align="right"> <a accesskey="n" href="dbrename.html">Next</a></td> </tr> <tr> <td width="40%" align="left" valign="top">DB->put() </td> <td width="20%" align="center"> <a accesskey="h" href="index.html">Home</a> </td> <td width="40%" align="right" valign="top"> DB->rename()</td> </tr> </table> </div> </body> </html>