#include <db_cxx.h> int Db::remove(const char *file, const char *database, u_int32_t flags);
The Db::remove() method removes the database specified by the
file and database parameters. If no database is specified, the underlying file
represented by file is removed,
incidentally removing all of the databases it contained.
Applications should never remove databases with open Db handles, or in the case of removing a file, when any database in the file has an open handle. For example, some architectures do not permit the removal of files with open system handles. On these architectures, attempts to remove databases currently in use by any thread of control in the system may fail.
The Db::remove() method should not be called if the remove is
intended to be transactionally safe; the
DbEnv::dbremove() method
should be used instead.
The Db::remove() 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::remove.
()
The Db handle may not be
accessed again after Db::remove() is called, regardless of its
return.
The Db::remove()
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.
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::remove() is affected by any database directory specified using the
DbEnv::add_data_dir()
method, or by setting the "add_data_dir" string
in the environment's DB_CONFIG file.
The Db::remove()
method may fail and throw a DbException
exception, encapsulating one of the following non-zero errors, or return one
of the following non-zero errors:
If the method was called after Db::open() was called; or if an invalid flag value or parameter was specified.