text: explain plan for select * from (
  select
  	sum(distinct c_integer) as a1,
  	avg(distinct c_integer) as a2,
  	sum(distinct c_integer) as a3,
  	avg(distinct c_integer) as a4,
  	sum(distinct c_integer) as a5,
  	avg(distinct c_integer) as a6,
  	sum(distinct c_integer) as a7,
  	avg(distinct c_integer) as a8,
  	sum(distinct c_integer) as a9,
  	avg(distinct c_integer) as a10
  from
  alltypes_v
  ) t limit 0;
  