Snowflake SQL UDF - Unsupported Subquery Error - sql

Question

I am creating a Snowflake SQL UDF. I keep running into SQL compilation error: Unsupported subquery type cannot be evaluated. I have tried to do several things to go around the issue, this being my latest try.
How can I make this break out of the subquery'ing error?
The UDF should allow one to input their preferred year. Thinking to create a solution by if a year is not provided, the default would be the present year.
create or replace function new_value(PRICE float, TYPE varchar, YR_CREATED int, YEAR int)
returns float
as
$$
with AGE_OF_PRODUCT as (
select any_value((YEAR - YR_CREATED)) as AGE ),
FORMULA as (
select any_value(AGE) as AGE,
any_value(case
when AGE <= 1 then 1
else 2
end) as FUNCTION
from AGE_OF_PRODUCT
)
select
any_value(case
when F.FUNCTION = 1 then (PRICE - (PRICE * R.R1))
else (PRICE * (1 - (R.R1))) * pow((1-(R.R2)), ((F.AGE - YR_CREATED)-1))
end) as VALUE
from FORMULA as F, RATES as R
where TYPE = R.TYPE_OF_PRODUCT
$$;

Answer 1

So the main problem is you are likely using the function like:
select v.*,
new_value(v.price, v.type, v.yr_create, v.year) as awesome
from table_with_values as v
also your UDF can be rewritten as it stands as:
create or replace function new_value(
PRICE float,
TYPE varchar,
YR_CREATED int,
YEAR int)
returns float
as
$$
select
YEAR - YR_CREATED as age,
case age <= 1
when true then (PRICE - (PRICE * r.r1))
else (PRICE * (1 - (r.r1))) * pow((1-(r.r2)), ((age - YR_CREATED)-1))
end as value
from rates as r
where TYPE = r.type_of_product
$$;
but if we move the join to rates outside the UDF
create or replace function new_value(
PRICE float,
YR_CREATED int,
YEAR int,
rate1 float,
rate2 float)
returns float
as
$$
select
case (YEAR - YR_CREATED) <= 1
when true then (PRICE - (PRICE * r.r1))
else (PRICE * (1 - (rate1))) * pow((1-(rate2)), (((YEAR - YR_CREATED) - YR_CREATED)-1))
end as value;
$$;
then we can call it like:
select v.*,
new_value(v.price, v.yr_create, v.year, r.r1, r.r2) as awesome
from table_with_values as v
join rates as r
on v.type = r.type_of_product