Edit File: CoreDBAdmin.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>Administrative Methods</title> <link rel="stylesheet" href="gettingStarted.css" type="text/css" /> <meta name="generator" content="DocBook XSL Stylesheets V1.62.4" /> <link rel="home" href="index.html" title="Getting Started with Berkeley DB" /> <link rel="up" href="DB.html" title="Chapter 2. Databases" /> <link rel="previous" href="DBOpenFlags.html" title="Database Open Flags" /> <link rel="next" href="dbErrorReporting.html" title="Error Reporting Functions" /> </head> <body> <div class="navheader"> <table width="100%" summary="Navigation header"> <tr> <th colspan="3" align="center">Administrative Methods</th> </tr> <tr> <td width="20%" align="left"><a accesskey="p" href="DBOpenFlags.html">Prev</a> </td> <th width="60%" align="center">Chapter 2. Databases</th> <td width="20%" align="right"> <a accesskey="n" href="dbErrorReporting.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="CoreDBAdmin"></a>Administrative Methods</h2> </div> </div> <div></div> </div> <p> The following <tt class="classname">DB</tt> methods may be useful to you when managing DB databases: </p> <div class="itemizedlist"> <ul type="disc"> <li> <p> <tt class="methodname">DB->get_open_flags()</tt> </p> <p> Returns the current open flags. It is an error to use this method on an unopened database. </p> <a id="c_db5"></a> <pre class="programlisting">#include <db.h> ... DB *dbp; u_int32_t open_flags; /* Database open and subsequent operations omitted for clarity */ dbp->get_open_flags(dbp, &open_flags); </pre> </li> <li> <p> <tt class="methodname">DB->remove()</tt> </p> <p> Removes the specified database. If no value is given for the <i class="parameter"><tt>database</tt></i> parameter, then the entire file referenced by this method is removed. </p> <p> Never remove a database that has handles opened for it. Never remove a file that contains databases with opened handles. </p> <a id="c_db6"></a> <pre class="programlisting">#include <db.h> ... DB *dbp; /* Database handle creation omitted for clarity */ dbp->remove(dbp, /* Database pointer */ "mydb.db", /* Database file to remove */ NULL, /* Database to remove. This is * NULL so the entire file is * removed. */ 0); /* Flags. None used. */</pre> </li> <li> <p> <tt class="methodname">DB->rename()</tt> </p> <p> Renames the specified database. If no value is given for the <i class="parameter"><tt>database</tt></i> parameter, then the entire file referenced by this method is renamed. </p> <p> Never rename a database that has handles opened for it. Never rename a file that contains databases with opened handles. </p> <a id="c_db7"></a> <pre class="programlisting">#include <db.h> ... DB *dbp; /* Database handle creation omitted for clarity */ dbp->rename(dbp, /* Database pointer */ "mydb.db", /* Database file to rename */ NULL, /* Database to rename. This is * NULL so the entire file is * renamed. */ "newdb.db", /* New database file name */ 0); /* Flags. None used. */</pre> </li> </ul> </div> <span> </span> </div> <div class="navfooter"> <hr /> <table width="100%" summary="Navigation footer"> <tr> <td width="40%" align="left"><a accesskey="p" href="DBOpenFlags.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="dbErrorReporting.html">Next</a></td> </tr> <tr> <td width="40%" align="left" valign="top">Database Open Flags </td> <td width="20%" align="center"> <a accesskey="h" href="index.html">Home</a> </td> <td width="40%" align="right" valign="top"> Error Reporting Functions</td> </tr> </table> </div> </body> </html>
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