148 lines
5.1 KiB
HTML
148 lines
5.1 KiB
HTML
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
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<title>Administrative Methods</title>
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<link rel="stylesheet" href="gettingStarted.css" type="text/css" />
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<meta name="generator" content="DocBook XSL Stylesheets V1.62.4" />
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<link rel="home" href="index.html" title="Getting Started with Berkeley DB" />
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<link rel="up" href="DB.html" title="Chapter 2. Databases" />
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<link rel="previous" href="DBOpenFlags.html" title="Database Open Flags" />
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<link rel="next" href="dbErrorReporting.html" title="Error Reporting Functions" />
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</head>
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<body>
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<div class="navheader">
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<table width="100%" summary="Navigation header">
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<tr>
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<th colspan="3" align="center">Administrative Methods</th>
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</tr>
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<tr>
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<td width="20%" align="left"><a accesskey="p" href="DBOpenFlags.html">Prev</a> </td>
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<th width="60%" align="center">Chapter 2. Databases</th>
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<td width="20%" align="right"> <a accesskey="n" href="dbErrorReporting.html">Next</a></td>
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</tr>
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</table>
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<hr />
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</div>
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<div class="sect1" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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<h2 class="title" style="clear: both"><a id="CoreDBAdmin"></a>Administrative Methods</h2>
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</div>
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</div>
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<div></div>
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</div>
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<p>
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The following
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<tt class="classname">Db</tt>
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methods may be useful to you when managing DB databases:
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</p>
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<div class="itemizedlist">
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<ul type="disc">
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<li>
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<p>
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<tt class="methodname">Db::get_open_flags()</tt>
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</p>
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<p>
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Returns the current open flags. It is an error to use this method on
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an unopened database.
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</p>
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<a id="cxx_db5"></a>
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<pre class="programlisting">#include <db_cxx.h>
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...
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Db db(NULL, 0);
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u_int32_t open_flags;
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// Database open and subsequent operations omitted for clarity
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db.get_open_flags(&open_flags); </pre>
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</li>
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<li>
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<p>
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<tt class="methodname">Db::remove()</tt>
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</p>
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<p>
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Removes the specified database. If no value is given for the
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<i class="parameter"><tt>database</tt></i> parameter, then the entire file
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referenced by this method is removed.
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</p>
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<p>
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Never remove a database that has handles opened for it. Never remove a file that
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contains databases with opened handles.
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</p>
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<a id="cxx_db6"></a>
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<pre class="programlisting">#include <db_cxx.h>
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...
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Db db(NULL, 0);
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// Database handle creation omitted for clarity
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db.remove("mydb.db", // Database file to remove
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NULL, // Database to remove. This is
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// NULL so the entire file is
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// removed.
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0); // Flags. None used.</pre>
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</li>
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<li>
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<p>
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<tt class="methodname">Db::rename()</tt>
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</p>
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<p>
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Renames the specified database. If no value is given for the
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<i class="parameter"><tt>database</tt></i> parameter, then the entire file
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referenced by this method is renamed.
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</p>
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<p>
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Never rename a database that has handles opened for it. Never rename a file that
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contains databases with opened handles.
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</p>
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<a id="cxx_db7"></a>
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<pre class="programlisting">#include <db_cxx.h>
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...
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Db db(NULL, 0);
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// Database handle creation omitted for clarity
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db.rename("mydb.db", // Database file to rename
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NULL, // Database to rename. This is
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// NULL so the entire file is
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// renamed.
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"newdb.db", // New database file name
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0); // Flags. None used.</pre>
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</li>
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</ul>
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</div>
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<span>
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</span>
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</div>
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<div class="navfooter">
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<hr />
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<table width="100%" summary="Navigation footer">
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<tr>
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<td width="40%" align="left"><a accesskey="p" href="DBOpenFlags.html">Prev</a> </td>
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<td width="20%" align="center">
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<a accesskey="u" href="DB.html">Up</a>
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</td>
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<td width="40%" align="right"> <a accesskey="n" href="dbErrorReporting.html">Next</a></td>
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</tr>
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<tr>
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<td width="40%" align="left" valign="top">Database Open Flags </td>
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<td width="20%" align="center">
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<a accesskey="h" href="index.html">Home</a>
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</td>
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<td width="40%" align="right" valign="top"> Error Reporting Functions</td>
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</tr>
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</table>
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</div>
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</body>
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</html>
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