# DbEnv::log_unregister |

`

###

    #include <db_cxx.h>

    int
    DbEnv::log_unregister(int32_t fid);

# Description

The DbEnv::log_unregister method disassociates the file name to file identification number mapping for the file identification number specified by the fid parameter. The file identification number may then be reused.

The DbEnv::log_unregister 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.

# Errors

If a fatal error occurs in Berkeley DB, the DbEnv::log_unregister method will fail and either return DB_RUNRECOVERY or throw an exception encapsulating DB_RUNRECOVERY, at which point all subsequent database calls will fail in the same way.

In addition, the DbEnv::log_unregister method may fail and throw an exception or return a non-zero error for the following conditions:

EINVAL
  An invalid flag value or parameter was specified.

In addition, the DbEnv::log_unregister method may fail and throw an exception or return a non-zero error for errors specified for other Berkeley DB and C library or system methods.

### Class

DbEnv

# See Also

DbEnv::set_lg_bsize, DbEnv::set_lg_max, DbEnv::log_archive, DbEnv::log_compare, DbEnv::log_file, DbEnv::log_flush, DbEnv::log_get, DbEnv::log_put, DbEnv::log_register, DbEnv::log_stat and DbEnv::log_unregister.`

Copyright Sleepycat Software