public int del(int flags) throws DbException;
The Dbc.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 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 refer to an existing key will fail.
If the element has already been deleted, Dbc.del will return Db.DB_KEYEMPTY.
If the cursor is not yet initialized, the Dbc.del method throws an exception that encapsulates EINVAL.
Otherwise, the Dbc.del method throws an exception that encapsulates a non-zero error value on failure.
The Dbc.del method may fail and throw an exception encapsulating a non-zero error for the following conditions:
If the operation was selected to resolve a deadlock, the Dbc.del method will fail and throw a DbDeadlockException exception.
The Dbc.del method may fail and throw an exception for errors specified for other Berkeley DB and C library or system methods. If a catastrophic error has occurred, the Dbc.del method may fail and throw a DbRunRecoveryException, in which case all subsequent Berkeley DB calls will fail in the same way.
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