1<!--$Id: env_set_tx_timestamp.so,v 10.29 2004/09/28 15:04:23 bostic Exp $--> 2<!--Copyright (c) 1997,2008 Oracle. All rights reserved.--> 3<!--See the file LICENSE for redistribution information.--> 4<html> 5<head> 6<title>Berkeley DB: DB_ENV->set_tx_timestamp</title> 7<meta name="description" content="Berkeley DB: An embedded database programmatic toolkit."> 8<meta name="keywords" content="embedded,database,programmatic,toolkit,btree,hash,hashing,transaction,transactions,locking,logging,access method,access methods,Java,C,C++"> 9</head> 10<body bgcolor=white> 11<table width="100%"><tr valign=top> 12<td> 13<b>DB_ENV->set_tx_timestamp</b> 14</td> 15<td align=right> 16<a href="../api_c/api_core.html"><img src="../images/api.gif" alt="API"></a> 17<a href="../ref/toc.html"><img src="../images/ref.gif" alt="Ref"></a></td> 18</tr></table> 19<hr size=1 noshade> 20<tt> 21<b><pre> 22#include <db.h> 23<p> 24int 25DB_ENV->set_tx_timestamp(DB_ENV *dbenv, time_t *timestamp); 26<p> 27int 28DB_ENV->get_tx_timestamp(DB_ENV *dbenv, time_t *timestampp); 29</pre></b> 30<hr size=1 noshade> 31<b>Description: DB_ENV->set_tx_timestamp</b> 32<p>Recover to the time specified by <b>timestamp</b> rather than to the 33most current possible date.</p> 34<p>Once a database environment has been upgraded to a new version of Berkeley DB 35involving a log format change (see <a href="../ref/upgrade/process.html">Upgrading Berkeley DB installations</a>), it is no longer possible to recover 36to a specific time before that upgrade.</p> 37<p>The DB_ENV->set_tx_timestamp method configures operations performed using the specified 38<a href="../api_c/env_class.html">DB_ENV</a> handle, not all operations performed on the underlying 39database environment.</p> 40<p>The DB_ENV->set_tx_timestamp method may not be called after the <a href="../api_c/env_open.html">DB_ENV->open</a> method is 41called. 42</p> 43<p>The DB_ENV->set_tx_timestamp method 44returns a non-zero error value on failure 45and 0 on success. 46</p> 47<b>Parameters</b> <br> 48 <b>timestamp</b><ul compact><li>The <b>timestamp</b> parameter references the memory location where the 49recovery timestamp is located. 50<p>The <b>timestamp</b> parameter should be the number of seconds since 0 51hours, 0 minutes, 0 seconds, January 1, 1970, Coordinated Universal 52Time; that is, the Epoch.</p></ul> 53<br> 54<br><b>Errors</b> 55<p>The DB_ENV->set_tx_timestamp method 56may fail and return one of the following non-zero errors:</p> 57<br> 58<b>EINVAL</b><ul compact><li>If it is not possible to recover to the specified time using the log files 59currently present in the environment; or if an 60invalid flag value or parameter was specified.</ul> 61<br> 62<hr size=1 noshade> 63<b>Description: DB_ENV->get_tx_timestamp</b> 64<p>The DB_ENV->get_tx_timestamp method returns the recovery timestamp.</p> 65<p>The DB_ENV->get_tx_timestamp method may be called at any time during the life of the 66application.</p> 67<p>The DB_ENV->get_tx_timestamp method 68returns a non-zero error value on failure 69and 0 on success. 70</p> 71<b>Parameters</b> <br> 72 <b>timestampp</b><ul compact><li>The DB_ENV->get_tx_timestamp method returns the 73recovery timestamp in <b>timestampp</b>.</ul> 74<br> 75<hr size=1 noshade> 76<br><b>Class</b> 77<a href="../api_c/env_class.html">DB_ENV</a>, <a href="../api_c/txn_class.html">DB_TXN</a> 78<br><b>See Also</b> 79<a href="../api_c/txn_list.html">Transaction Subsystem and Related Methods</a> 80</tt> 81<table width="100%"><tr><td><br></td><td align=right> 82<a href="../api_c/api_core.html"><img src="../images/api.gif" alt="API"></a><a href="../ref/toc.html"><img src="../images/ref.gif" alt="Ref"></a> 83</td></tr></table> 84<p><font size=1>Copyright (c) 1996,2008 Oracle. All rights reserved.</font> 85</body> 86</html> 87
