Materialized View plan alters explicit cast type in query

create materialized view mv_tv_view_data_av2 stored as orc TBLPROPERTIES ('transactional'='true') as
select
  total_views `total_views`,
  sum(cast(1.5 as decimal(9,4))) over (order by total_views) as quartile,
  program
from tv_view_data;

LogicalProject(quartile=[CAST($0):DECIMAL(12, 1)], total=[$1])
  HiveTableScan(table=[[arc_view, mv_tv_view_data_av1]], table:alias=[mv_tv_view_data_av1])

select
POSTHOOK: query: select
  t.quartile,
  t.quartile,
  max(t.total_views) total
  max(t.total_views) total
from wealth t2,
from wealth t2,
(select
(select
  total_views `total_views`,
  total_views `total_views`,
  sum(cast(1.5 as decimal(9,4))) over (order by total_views) as quartile,
  sum(cast(1.5 as decimal(9,4))) over (order by total_views) as quartile,
  program
  program
from tv_view_data) t
from tv_view_data) t
where t.program=t2.watches
where t.program=t2.watches
group by quartile
group by quartile
order by quartile

1.5	1300000
4.5	15000000
6.0	20000000