* | select 
  round(compare[3], 4) as ratio, 
  compare[1] as current_avg_request_time, 
  compare[2] as yesterday_avg_request_time 
from 
  (
    select compare(avg_request_time, 86400) as compare 
    from 
      (
        select avg("request_time") as avg_request_time
      )
  )

$1.ratio > 1.5