#include <db_cxx.h>
 
int
DbEnv::fileid_reset(const char *file, u_int32_t flags);

The DbEnv::fileid_reset() method allows database files to be copied, and then the copy used in the same database environment as the original.

All databases contain an ID string used to identify the database in the database environment cache. If a physical database file is copied, and used in the same environment as another file with the same ID strings, corruption can occur. The DbEnv::fileid_reset() method creates new ID strings for all of the databases in the physical file.

The DbEnv::fileid_reset() method modifies the physical file, in-place. Applications should not reset IDs in files that are currently in use.

The DbEnv::fileid_reset() method may be called at any time during the life of the application.

The DbEnv::fileid_reset() method is a non-atomic operation. If the operation fails, it is possible for the copied database to be in an inconsistent state.

The DbEnv::fileid_reset() 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.