Thread: using a function in where
All,
I am using the function below to convert a continuous variable to a binned value. Sometimes a value other than zero is passed through the query. For example -.5 result value is passed to the query result. The basic of the query is below.
select
incentivebin(wac, rate, .25)
from
my_table
where incentivebin(was, rate, .25) = 0
I have checked the function works correctly and the raw values match those values expected from simple subtraction and are in the correct bin. I am not sure why some values would be allowed through the query. Any ideas would be appreciated.
Best,
Glenn
CREATE or REPLACE FUNCTION embs_owner.IncentiveBin(IN "Gwac" double precision,
IN "MtgRate" double precision,
IN "BinSize" double precision)
RETURNS double precision
LANGUAGE 'sql'
PARALLEL SAFE
AS 'select ceiling(($1 - $2)/$3) *$3';
ALTER FUNCTION embs_owner.IncentiveBin(double precision, double precision, double precision)
OWNER TO embs_owner;
>>>>> "Glenn" == Glenn Schultz <glenn@bondlab.io> writes: Glenn> All, Glenn> I am using the function below to convert a continuous variable Glenn> to a binned value. Sometimes a value other than zero is passed Glenn> through the query. For example -.5 result value is passed to the Glenn> query result. The basic of the query is below. Glenn> select Glenn> incentivebin(wac, rate, .25) Glenn> from Glenn> my_table Glenn> where incentivebin(was, rate, .25) = 0 Those two calls to incentivebin() have different parameters - is that an error in the original query, or a typo in transcribing it to email? -- Andrew (irc:RhodiumToad)
> On 3 Dec 2018, at 8:06, Glenn Schultz <glenn@bondlab.io> wrote: > > All, > I am using the function below to convert a continuous variable to a binned value. Sometimes a value other than zero ispassed through the query. For example -.5 result value is passed to the query result. The basic of the query is below. > > select > incentivebin(wac, rate, .25) > from > my_table > where incentivebin(was, rate, .25) = 0 > CREATE or REPLACE FUNCTION embs_owner.IncentiveBin(IN "Gwac" double precision, > AS 'select ceiling(($1 - $2)/$3) *$3'; If the difference of (wac - rate) = -0.5, and you multiply that by 4 (divide by .25), ceil will round that correctly to -2.If you then divide by 4 again, you get -0.5 back (which is twice your bin size). The result matches your function definition with the given parameters. Alban Hertroys -- If you can't see the forest for the trees, cut the trees and you'll find there is no forest.