<?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->set_tx_timestamp()</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="txn.html" title="Chapter 12. The DB_TXN Handle" /> <link rel="prev" href="envset_tx_max.html" title="DB_ENV->set_tx_max()" /> <link rel="next" href="txnabort.html" title="DB_TXN->abort()" /> </head> <body> <div class="navheader"> <table width="100%" summary="Navigation header"> <tr> <th colspan="3" align="center">DB_ENV->set_tx_timestamp()</th> </tr> <tr> <td width="20%" align="left"><a accesskey="p" href="envset_tx_max.html">Prev</a> </td> <th width="60%" align="center">Chapter 12. The DB_TXN Handle </th> <td width="20%" align="right"> <a accesskey="n" href="txnabort.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="envset_tx_timestamp"></a>DB_ENV->set_tx_timestamp()</h2> </div> </div> </div> <pre class="programlisting">#include <db.h> int DB_ENV->set_tx_timestamp(DB_ENV *dbenv, time_t *timestamp); </pre> <p> Recover to the time specified by <span class="bold"><strong>timestamp</strong></span> rather than to the most current possible date. </p> <p> Once a database environment has been upgraded to a new version of Berkeley DB involving a log format change (see <a href="../../programmer_reference/upgrade_process.html" class="olink">Upgrading Berkeley DB installations</a>), it is no longer possible to recover to a specific time before that upgrade. </p> <p> The <code class="methodname">DB_ENV->set_tx_timestamp()</code> method configures operations performed using the specified <a class="link" href="env.html" title="Chapter 5. The DB_ENV Handle">DB_ENV</a> handle, not all operations performed on the underlying database environment. </p> <p> The <code class="methodname">DB_ENV->set_tx_timestamp()</code> method may not be called after the <a class="xref" href="envopen.html" title="DB_ENV->open()">DB_ENV->open()</a> method is called. </p> <p> The <code class="methodname">DB_ENV->set_tx_timestamp()</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="id1707989"></a>Parameters</h3> </div> </div> </div> <div class="sect3" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h4 class="title"><a id="id1708103"></a>timestamp</h4> </div> </div> </div> <p> The <span class="bold"><strong>timestamp</strong></span> parameter references the memory location where the recovery timestamp is located. </p> <p> The <span class="bold"><strong>timestamp</strong></span> parameter should be the number of seconds since 0 hours, 0 minutes, 0 seconds, January 1, 1970, Coordinated Universal Time; that is, the Epoch. </p> </div> </div> <div class="sect2" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h3 class="title"><a id="id1708260"></a>Errors</h3> </div> </div> </div> <p> The <code class="methodname">DB_ENV->set_tx_timestamp()</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="id1707705"></a>EINVAL</h4> </div> </div> </div> <p> If it is not possible to recover to the specified time using the log files currently present in the environment; or if an invalid flag value or parameter was specified. </p> </div> </div> <div class="sect2" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h3 class="title"><a id="id1708163"></a>Class</h3> </div> </div> </div> <p> <a class="link" href="env.html" title="Chapter 5. The DB_ENV Handle">DB_ENV</a>, <a class="link" href="txn.html" title="Chapter 12. The DB_TXN Handle">DB_TXN</a> </p> </div> <div class="sect2" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h3 class="title"><a id="id1707990"></a>See Also</h3> </div> </div> </div> <p> <a class="xref" href="txn.html#txnlist" title="Transaction Subsystem and Related Methods">Transaction Subsystem 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="envset_tx_max.html">Prev</a> </td> <td width="20%" align="center"> <a accesskey="u" href="txn.html">Up</a> </td> <td width="40%" align="right"> <a accesskey="n" href="txnabort.html">Next</a></td> </tr> <tr> <td width="40%" align="left" valign="top">DB_ENV->set_tx_max() </td> <td width="20%" align="center"> <a accesskey="h" href="index.html">Home</a> </td> <td width="40%" align="right" valign="top"> DB_TXN->abort()</td> </tr> </table> </div> </body> </html>