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<h1>DB_ENV->set_tx_timestamp</h1>
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<h3><pre>
#include <db.h>
<p>
int
DB_ENV->set_tx_timestamp(DB_ENV *dbenv, time_t *timestamp);
</pre></h3>
<h1>Description</h1>
<p>Recover to the time specified by <b>timestamp</b> rather than to the most
current possible date.
The <b>timestamp</b> argument should be the number of seconds since 0
hours, 0 minutes, 0 seconds, January 1, 1970, Coordinated Universal
Time; that is, the Epoch.
<p>Once a database environment has been upgraded to a new version of Berkeley DB
involving a log format change (see <a href="../ref/upgrade/process.html">Upgrading Berkeley DB installations</a>), it is no longer possible to recover
to a specific time before that upgrade.
<p>The DB_ENV->set_tx_timestamp method configures operations performed using the specified
<a href="../api_c/env_class.html">DB_ENV</a> handle, not all operations performed on the underlying
database environment.
<p>The DB_ENV->set_tx_timestamp interface may not be called after the <a href="../api_c/env_open.html">DB_ENV->open</a>
interface is called.
<p>The DB_ENV->set_tx_timestamp method returns a non-zero error value on failure and 0 on success.
<h1>Errors</h1>
<p>The DB_ENV->set_tx_timestamp method may fail and return a non-zero error for the following conditions:
<p><dl compact>
<p><dt>EINVAL<dd>An invalid flag value or parameter was specified.
<p>It is not possible to recover to the specified time using the log files
currently present in the environment.
</dl>
<p>The DB_ENV->set_tx_timestamp method may fail and return a non-zero error for errors specified for other Berkeley DB and C library or system functions.
If a catastrophic error has occurred, the DB_ENV->set_tx_timestamp method may fail and
return <a href="../ref/program/errorret.html#DB_RUNRECOVERY">DB_RUNRECOVERY</a>,
in which case all subsequent Berkeley DB calls will fail in the same way.
<h1>Class</h1>
<a href="../api_c/env_class.html">DB_ENV</a>, <a href="../api_c/txn_class.html">DB_TXN</a>
<h1>See Also</h1>
<a href="../api_c/txn_list.html">Transaction Subsystem and Related Methods</a>
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