Viewing file:  dbc_count.html (2.8 KB) -rw-r--r--
Select action/file-type:
 (+) | (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
Berkeley DB: Dbc::count
Dbc::count
|
 |
#include <db_cxx.h>
int
Dbc::count(db_recno_t *countp, u_int32_t flags);
Description: Dbc::count
The Dbc::count method returns a count of the number of data items for
the key to which the cursor refers.
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 on success.
Parameters
- countp
- The countp parameter references memory into which
the count of the number of duplicate data items is copied.
- flags
- The flags parameter is currently unused, and must be set to 0.
Errors
The Dbc::count method
may fail and throw
DbException,
encapsulating one of the following non-zero errors, or return one of
the following non-zero errors:
- DB_REP_HANDLE_DEAD
- The database handle has been invalidated because a replication election
unrolled a committed transaction.
- EINVAL
- If the cursor has not been initialized; or if an
invalid flag value or parameter was specified.
Class
Dbc
See Also
Database Cursors and Related Methods
Copyright (c) 1996-2004 Sleepycat Software, Inc. - All rights reserved.
|