Re: PostgreSQL - ERROR: Cannot cast type character varying to

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

Mauricio Fernandez wrote:
>
> Hello I´m new in the list, and I want to learn a lot about postgresql, now
> I´m working in a database and I have this problem:
>
> I have a table called historicoventas as follows (just the structure)
>
> > historicoventas
> > (
> > codigopedido varchar(20)
> > codigohospital varchar(20)
> > fecha varchar(15)
> > producto varchar(20)
> > unidades varchar(10)
> > costo varchar(20)
> > )
> >
> And I want to create a view based on that table whit this instruction:
>
> > CREATE OR REPLACE VIEW vw_temphistoricoventas
> > (Pedido, Fecha, Hospital, Producto, Unidades, Costo)
> > AS
> > SELECT codigoPedido , (substring( fecha from 1 for 4 ) || '-'
> > || substring( fecha from 5 for 2 ) || '-'
> > || substring( fecha from 7 for 2 ) ) AS fecha,
> > codigoHospital , producto , sum( unidades::int4 ) AS unidades, sum(
> > costo::float4 ) AS costo
> > FROM historicoventas
> > WHERE ((producto = '759928') OR (producto = '759936') OR
> > (producto = '4002382') OR (producto = '4002580'))
> > GROUP BY codigoPedido, fecha, codigoHospital, producto
> > ORDER BY fecha;
> But I always get this message:
> > ERROR: Cannot cast type character varying to integer
> My developer workstation is under win xp and postgresql 8.0 but in
> production server (external web hosting partner) I have a Linux Red Hat with
> kernel 2.4.21-27.0.2.ELsmp y PostgreSQL 7.3.
> In local machine all castings between data types works fine but in server it
> doesn´t.
> convertions like sum(unidades::int4) works fine and reading the postgresql
> 7.3 docs I can see this type of convertions are enabled by the system
> Can somebody help me with this topic?
>
> Thanks a lot
>
> >
> > Mauricio Fernández A.
> > Ingeniero de Sistemas
> > Universidad Autónoma de Manizales
> > mfacontacto(at)ono(dot)com
> > movil: 607365968
> >
> > P.D. Some historicoventas table rows can be:
> > codPedido codHospital fecha producto unidades
> > costo
> > 0001001299 100058 20050103 759936 1
> > 2375
> > 0001001299 100058 20050103 759928 1
> > 2375
> > 0001001300 100078 20050103 759936 1
> > 2375
> > 0001003044 100086 20050614 759936 1
> > 2275.25
> > 0001003128 100062 20050623 759936 2
> > 4550.5
> > 0001003129 100069 20050623 759936 2
> > 4550.5
> > 0001003131 100019 20050623 759928 5
> > 11376.25
> > 0001003131 100019 20050623 759936 3
> > 6825.75
> > 0001003132 100075 20050623 759936 4
> > 9101
> > 0001003133 100106 20050623 759936 2
> > 4550.5
> > 0001003134 100031 20050623 759936 2
> > 4550.5
> > 0001003135 100037 20050623 759936 3
> > 6825.75
> > 0001003136 100009 20050623 759936 5
> > 11376.25
> > 0001003137 100009 20050623 759936 1
> > 2275.25
> > 0001003138 100024 20050623 759936 4
> > 9101
>
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