Обсуждение: Cannot query views with WHERE clause on renamed columns

Hi,

I try to do what seems to be totally simple, but it fails. If I query a view that contains renamed columns without any
qualifierlike 

SELECT * FROM myview

it displays everything. If however I do

SELECT reanmedviewcolumn FROM myview

It tells me column does not exist which in fact does. I can query any non-renamed columns. But the renamed ones I can
neithercall by their original name, not int he SELECT part nor in the WHERE clause. 

I can neither leave the view with just the original names as it's a selfjoin.

What do I need to do?

Thanks
Alex

Alexander Reichstadt wrote
> Hi,
>
> I try to do what seems to be totally simple, but it fails. If I query a
> view that contains renamed columns without any qualifier like
>
> SELECT * FROM myview
>
> it displays everything. If however I do
>
> SELECT reanmedviewcolumn FROM myview
>
> It tells me column does not exist which in fact does. I can query any
> non-renamed columns. But the renamed ones I can neither call by their
> original name, not int he SELECT part nor in the WHERE clause.
>
> I can neither leave the view with just the original names as it's a
> selfjoin.
>
> What do I need to do?

Show us your actual code that is failing?

The general idea of what you are saying indeed works:

BEGIN;

CREATE VIEW myview AS SELECT 'one'::text AS one, 'two'::text AS two;

SELECT one FROM myview WHERE two = 'three';

ROLLBACK;

David J.





--
View this message in context:
http://postgresql.1045698.n5.nabble.com/Cannot-query-views-with-WHERE-clause-on-renamed-columns-tp5809873p5809880.html
Sent from the PostgreSQL - general mailing list archive at Nabble.com.

Alexander Reichstadt <lxr@mac.com> writes:
> I try to do what seems to be totally simple, but it fails. If I query a view that contains renamed columns without
anyqualifier like 

> SELECT * FROM myview

> it displays everything. If however I do

> SELECT reanmedviewcolumn FROM myview

> It tells me column does not exist which in fact does.

What do you mean by a "renamed column"?  A concrete example would help
here.

            regards, tom lane