| From: | Andrus <kobruleht2(at)hot(dot)ee> |
|---|---|
| To: | "David G(dot) Johnston" <david(dot)g(dot)johnston(at)gmail(dot)com> |
| Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Adrian Klaver <adrian(dot)klaver(at)aklaver(dot)com>, pgsql-general <pgsql-general(at)postgresql(dot)org> |
| Subject: | Re: How to return argument data type from sql function |
| Date: | 2022-10-14 21:56:33 |
| Message-ID: | b6519a3e-76f3-85d5-c9aa-c79c5d119524@hot.ee |
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| Thread: | |
| Lists: | pgsql-general |
> 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.
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