#include <db.h>

DB->rename(DB *db, const char *file,
    const char *database, const char *newname, u_int32_t flags);  

The DB->rename() method renames the database specified by the file and database parameters to newname. If no database is specified, the underlying file represented by file is renamed, incidentally renaming all of the databases it contained.

Applications should not rename databases that are currently in use. If an underlying file is being renamed and logging is currently enabled in the database environment, no database in the file may be open when the DB->rename() method is called. In particular, some architectures do not permit renaming files with open handles. On these architectures, attempts to rename databases that are currently in use by any thread of control in the system may fail.

The DB->rename() method should not be called if the rename is intended to be transactionally safe; the DB_ENV->dbrename() method should be used instead.

The DB->rename() method can not be used for sliced databases; the DB_ENV->dbrename() method should be used instead.

The DB->rename() method may not be called after calling the DB->open() method on any DB handle. If the DB->open() method has already been called on a DB handle, close the existing handle and create a new one before calling DB->rename().

The DB handle may not be accessed again after DB->rename() is called, regardless of its return.

The DB->rename() method returns a non-zero error value on failure and 0 on success.



The file parameter is the physical file which contains the database(s) to be renamed.

When using a Unicode build on Windows (the default), the file argument will be interpreted as a UTF-8 string, which is equivalent to ASCII for Latin characters.


The database parameter is the database to be renamed.


The newname parameter is the new name of the database or file.


The flags parameter is currently unused, and must be set to 0.

Environment Variables

If the database was opened within a database environment, the environment variable DB_HOME may be used as the path of the database environment home.

DB->rename() is affected by any database directory specified using the DB_ENV->add_data_dir() method, or by setting the "add_data_dir" string in the environment's DB_CONFIG file.


The DB->rename() method may fail and return one of the following non-zero errors:


If the method was called after DB->open() was called; if this method was called on a sliced database; or if an invalid flag value or parameter was specified.


The file or directory does not exist.


Checksum mismatch detected on a database metadata page. Either the database is corrupted or the file is not a Berkeley DB database file.



See Also

Database and Related Methods