thanks for the answer. i get it too as
sum(int4(unidades::text))
Maybe somebody will need this answer too, so i want to add some info I get
from other list:
We can know wich CAST we have in our DB with this view:
create view showcasts as select t.typname as source, t1.typname as target, p.proname as function, (select case when
c.castcontext= 'e' then 'Must use Explicit Cast' else ( select case when c.castcontext = 'i' then
'Implicitcast for expressions and assignments' else 'Implicit cast only for assignments' end)
end) as casttype from pg_cast c, pg_type t, pg_type t1, pg_proc p where c.castsource = t.oid and c.casttarget =
t1.oidand c.castfunc = p.oid;
I hope this can be helpfull.
again thanks to all.
-----Mensaje original-----
De: ch@rodos.fzk.de [mailto:ch@rodos.fzk.de]
Enviado el: martes, 12 de julio de 2005 13:35
Para: Mauricio Fernandez
CC: pgsql-sql@postgresql.org
Asunto: Re: [SQL] PostgreSQL - ERROR: Cannot cast type character varying to
integer
Under PostgreSQL 7.3 it was necessary
to use an intermediate cast to text
when converting from varchar to int4.
sum( unidades::text::int4 ) should do.
Regards, Christoph
