int
DBcursor->c_del(DBC *cursor, u_int32_t flags);
Description
The DBcursor->c_del function deletes the key/data pair currently referenced by
the cursor.
The flags parameter is currently unused, and must be set to 0.
The cursor position is unchanged after a delete, and subsequent calls to
cursor functions expecting the cursor to reference an existing key will
fail.
If the element has already been deleted, DBcursor->c_del will return
DB_KEYEMPTY.
If the cursor is not yet initialized, the DBcursor->c_del function will return EINVAL.
Otherwise, the DBcursor->c_del function returns a non-zero error value on failure and 0 on success.
Errors
The DBcursor->c_del function may fail and return a non-zero error for the following conditions:
DB_LOCK_DEADLOCK
The operation was selected to resolve a deadlock.
EINVAL
An invalid flag value or parameter was specified.
EPERM
Write attempted on read-only cursor when the DB_INIT_CDB flag was
specified to DBENV->open.
The DBcursor->c_del function may fail and return a non-zero error for errors specified for other Berkeley DB and C library or system functions.
If a catastrophic error has occurred, the DBcursor->c_del function may fail and return
DB_RUNRECOVERY, in which case all subsequent Berkeley DB calls will fail
in the same way.