#include <db_cxx.h>

int
DbEnv::set_tx_timestamp(time_t *timestamp);

int
DbEnv::get_tx_timestamp(time_t *timestampp);

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 Upgrading Berkeley DB installations), 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 DbEnv handle, not all operations performed on the underlying database environment.

The DbEnv::set_tx_timestamp method may not be called after the DbEnv::open 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.

• 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.

The DbEnv::set_tx_timestamp method may fail and throw DbException, encapsulating one of the following non-zero errors, or return one of the following non-zero errors:

• 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.

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.

• The DbEnv::get_tx_timestamp method returns the recovery timestamp in timestampp.