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DbEnv::set_tx_timestamp
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#include &lt;db_cxx.h&gt;

int
DbEnv::set_tx_timestamp(time_t *timestamp);

int
DbEnv::get_tx_timestamp(time_t *timestampp);
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Description: DbEnv::set_tx_timestamp
Recover to the time specified by timestamp rather than to the
most current possible date.
Once a database environment has been upgraded to a new version of Berkeley DB
involving a log format change (see <a href="../../db4-devel-4.7.25/ref/upgrade/process.html">Upgrading Berkeley DB installations</a>), it is no longer possible to recover
to a specific time before that upgrade.
The DbEnv::set_tx_timestamp method configures operations performed using the specified
<a href="../../db4-devel-4.7.25/api_cxx/env_class.html">DbEnv</a> handle, not all operations performed on the underlying
database environment.
The DbEnv::set_tx_timestamp method may not be called after the <a href="../../db4-devel-4.7.25/api_cxx/env_open.html">DbEnv::open</a> method is
called.

The DbEnv::set_tx_timestamp 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.

Parameters 
 timestamp<ul compact><li>The timestamp parameter references the memory location where the
recovery timestamp is located.
The timestamp parameter should be the number of seconds since 0
hours, 0 minutes, 0 seconds, January 1, 1970, Coordinated Universal
Time; that is, the Epoch.</ul>
 
 Errors
The DbEnv::set_tx_timestamp method
may fail and throw
<a href="../../db4-devel-4.7.25/api_cxx/except_class.html">DbException</a>,
encapsulating one of the following non-zero errors, or return one of
the following non-zero errors:
 
EINVAL<ul compact><li>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.</ul>
 
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Description: DbEnv::get_tx_timestamp
The DbEnv::get_tx_timestamp method returns the recovery timestamp.
The DbEnv::get_tx_timestamp method may be called at any time during the life of the
application.
The DbEnv::get_tx_timestamp 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.

Parameters 
 timestampp<ul compact><li>The DbEnv::get_tx_timestamp method returns the
recovery timestamp in timestampp.</ul>
 
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 Class
<a href="../../db4-devel-4.7.25/api_cxx/env_class.html">DbEnv</a>, <a href="../../db4-devel-4.7.25/api_cxx/txn_class.html">DbTxn</a>
 See Also
<a href="../../db4-devel-4.7.25/api_cxx/txn_list.html">Transaction Subsystem and Related Methods</a>
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