#include <db.h>

int
DBcursor->del(DBC *DBcursor, u_int32_t flags);

The DBcursor->del method deletes the key/data pair to which the cursor refers.

When called on a cursor opened on a database that has been made into a secondary index using the DB->associate method, the DB->del method deletes the key/data pair from the primary database and all secondary indices.

The cursor position is unchanged after a delete, and subsequent calls to cursor functions expecting the cursor to refer to an existing key will fail.

The DBcursor->del method will return DB_KEYEMPTY if the element has already been deleted. Unless otherwise specified, the DBcursor->del method returns a non-zero error value on failure and 0 on success.

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

The DBcursor->del method may fail and return one of the following non-zero errors:

• A transactional database environment operation was selected to resolve a deadlock.

• A Berkeley DB Concurrent Data Store database environment configured for lock timeouts was unable to grant a lock in the allowed time.

• The database handle has been invalidated because a replication election unrolled a committed transaction.

• The operation was blocked by client/master synchronization.

• A secondary index references a nonexistent primary key.

• An attempt was made to modify a read-only database.

• If the cursor has not been initialized; or if an invalid flag value or parameter was specified.

• Write attempted on read-only cursor when the DB_INIT_CDB flag was specified to DB_ENV->open.