> Adrian Klaver recommends in
https://stackoverflow.com/questions/74061290/how-to-return-argument-datatype-from-sql-function#comment130780708_74061290
at this worked. In this best solution?
Padding a text typed output with actual significant spaces "works"? It
is not equivalent to a bpchar with insignificant padding spaces...
You are right. I need char(n) type and this is not working. How to use
expression in cast, like
select torus(charcol) :: CHAR( ColWidth('public', 'test', 'charcol') )
from test
This throws error in Postgres. ColWidth is immutable and called with
constant arguments so it should work. How to fix postgres to allow
constant ColWidth() expression in cast ?
Andrus.
