Berkeley DB

Dbc::count

						#include <db_cxx.h>
						int
						Dbc::count(db_recno_t *countp, u_int32_t flags);
					

Description

The Dbc::count method returns a count of the number of duplicate data items for the key referenced by the cursor into the memory location referenced by countp. If the underlying database does not support duplicate data items the call will still succeed and a count of 1 will be returned.

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

If the cursor argument is not yet initialized, the Dbc::count method either returns EINVAL or throws an exception that encapsulates EINVAL.

Otherwise, the Dbc::count method either returns a non-zero error value or throws an exception that encapsulates a non-zero error value on failure, and returns 0 ...