<?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>DbEnv::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 13. The DbTxn Handle" /> <link rel="prev" href="envset_tx_max.html" title="DbEnv::set_tx_max()" /> <link rel="next" href="txnrecover.html" title="DbEnv::txn_recover()" /> </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">DbEnv::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 13. The DbTxn Handle </th> <td width="20%" align="right"> <a accesskey="n" href="txnrecover.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>DbEnv::set_tx_timestamp()</h2> </div> </div> </div> <pre class="programlisting">#include <db_cxx.h> int DbEnv::set_tx_timestamp(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="../../upgrading/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">DbEnv::set_tx_timestamp()</code> method configures operations performed using the specified <a class="link" href="env.html" title="Chapter 5. The DbEnv Handle">DbEnv</a> handle, not all operations performed on the underlying database environment. </p> <p> The <code class="methodname">DbEnv::set_tx_timestamp()</code> method may not be called after the <a class="xref" href="envopen.html" title="DbEnv::open()">DbEnv::open()</a> method is called. </p> <p> The <code class="methodname">DbEnv::set_tx_timestamp()</code> <span> <span> method either returns a non-zero error value or throws an exception that encapsulates a non-zero error value on failure, and returns 0 on success. </span> </span> </p> <div class="sect2" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h3 class="title"><a id="idp4924424"></a>Parameters</h3> </div> </div> </div> <div class="sect3" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h4 class="title"><a id="idp4925128"></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="idp4917400"></a>Errors</h3> </div> </div> </div> <p> The <code class="methodname">DbEnv::set_tx_timestamp()</code> <span> <span> method may fail and throw a <a class="link" href="dbexception.html" title="Chapter 6. The DbException Class">DbException</a> exception, encapsulating one of the following non-zero errors, or 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="idp4932536"></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="idp4931456"></a>Class</h3> </div> </div> </div> <p> <a class="link" href="env.html" title="Chapter 5. The DbEnv Handle">DbEnv</a>, <a class="link" href="txn.html" title="Chapter 13. The DbTxn Handle">DbTxn</a> </p> </div> <div class="sect2" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h3 class="title"><a id="idp4933864"></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="txnrecover.html">Next</a></td> </tr> <tr> <td width="40%" align="left" valign="top">DbEnv::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"> DbEnv::txn_recover()</td> </tr> </table> </div> </body> </html>