Re: Trying to understand pg_get_expr()

On 3/17/26 1:08 PM, Marcos Pegoraro wrote:
> Em ter., 17 de mar. de 2026 às 16:31, Adrian Klaver
> <adrian(dot)klaver(at)aklaver(dot)com <mailto:adrian(dot)klaver(at)aklaver(dot)com>> escreveu:
>
> Why does the = 'test' not return anything?
>
>
> for me pg_get_expr(adbin, adrelid) returns 'test'::character varying
> so it differs from 'test'

I should have indicated I tried casting:

SELECT
adrelid::regclass,
pg_typeof(pg_get_expr(adbin, adrelid)),
pg_get_expr(adbin, adrelid)
FROM
pg_attrdef
WHERE
adrelid = 'default_test'::regclass
AND pg_get_expr(adbin, 0) = 'test'::character varying;

adrelid | pg_typeof | pg_get_expr
---------+-----------+-------------

I also tried other combinations of casting both sides of "=" and it
still did not work.

>
> regards
> Marcos

--
Adrian Klaver
adrian(dot)klaver(at)aklaver(dot)com