Thread: ERROR: using an explicit cast

Hi all

I am using postgres 6.3.2 and I experience problems using a union on views
In short, I have the following views defined:

create view vstockpart as select 'StockPart' as vpisource, pspid as
vpisourceid;
create view vquoteoutitem as select 'QuoteOutItem' as vpisource, fqoiid as
vpisourceid;

where pspid and fqoiid are both of type int.

When I launch the following query:

select vpisource,vpisourceid from vstockpart union select
vpisource,vpisourceid from vquoteoutitem;

then I get the following error:

NOTICE:    there is no more then one operator < for types
NOTICE:    unknown and unknown. You will have to retype this query
ERROR:    using an explicit cast.

Where can I find documentation regarding casts?
Does anybody know what is wrong? Or do I have to move to 6.4?

TIA
Wim Ceulemans - wim.ceulemans@nice.be
Nice Software Solutions
Eglegemweg 3, 2811 Hombeek - Belgium
Tel +32(0)15 41 29 53 - Fax +32(0)15 41 29 54

Hello Wim,

mercoledì, 9 dicembre 98, you wrote:

WC> Hi all

WC> I am using postgres 6.3.2 and I experience problems using a union on views
WC> In short, I have the following views defined:

WC> create view vstockpart as select 'StockPart' as vpisource, pspid as
WC> vpisourceid;
WC> create view vquoteoutitem as select 'QuoteOutItem' as vpisource, fqoiid as
WC> vpisourceid;

WC> where pspid and fqoiid are both of type int.

WC> When I launch the following query:

WC> select vpisource,vpisourceid from vstockpart union select
WC> vpisource,vpisourceid from vquoteoutitem;

WC> then I get the following error:

WC> NOTICE:    there is no more then one operator < for types
WC> NOTICE:    unknown and unknown. You will have to retype this query
WC> ERROR:    using an explicit cast.

WC> Where can I find documentation regarding casts?
WC> Does anybody know what is wrong? Or do I have to move to 6.4?

WC> TIA
WC> Wim Ceulemans - wim.ceulemans@nice.be
WC> Nice Software Solutions
WC> Eglegemweg 3, 2811 Hombeek - Belgium
WC> Tel +32(0)15 41 29 53 - Fax +32(0)15 41 29 54


   CREATE VIEW vista AS SELECT 'Hello World'

          View will be created having a column with an unknown type
          unless you specify it as:

   CREATE VIEW vista AS SELECT 'Hello World'::text


   -Jose'-