select length(encrypt('foo', 'ff')) <> 0;
length(encrypt('foo', 'ff')) <> 0
1
select old_password('test'), password('test');
old_password('test')	password('test')
378b243e220ca493	378b243e220ca493
select length(encrypt('test')), encrypt('test','aa');
length(encrypt('test'))	encrypt('test','aa')
13	aaqPiZY5xR5l.