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Re: Ambiguous error on view

From: Gnanavel S <s(dot)gnanavel(at)gmail(dot)com>
To: Toff <kristoff(dot)six(at)telenet(dot)be>
Cc: pgsql-novice(at)postgresql(dot)org
Subject: Re: Ambiguous error on view
Date: 2005-09-23 06:18:11
Message-ID: eec3b03c05092223185609251@mail.gmail.com (view raw or flat)
Thread:
Lists: pgsql-novice
On 9/20/05, Toff <kristoff(dot)six(at)telenet(dot)be> wrote:
>
> I found that
> "
> CREATE VIEW allops AS
> SELECT acc1.operator.operatorid, acc1.operator.accountid,
> acc1.operator.name <http://acc1.operator.name>, acc2.operator.operatorid,
> acc2.operator.accountid,
> acc2.operator.name <http://acc2.operator.name>
> FROM acc1.operator, acc2.operator
> WHERE (acc1.operator.active = true OR acc2.operator.active = true);
> "


try this,
CREATE VIEW allops AS
select operatorid,operatorname from acc1.operator where active=true
union
select operatorid,operatorname from acc2.operator where active=true
;

works for the ambiguous errors. But there are identical column names in the
> view (operatorid, accountid, name, operatorid, accountid, name) witch
> obvious fires
> an error "ERROR: column "operatorid" duplicated"
> So how to merge the data from the different schema's in one column in the
> view?
>
> The global / symbolic statement of what I wnat to do is
> SELECT operatorid FROM acc1.operator, acc2.operator,...... WHERE active =
> true;
> Are there perhaps other ways to do this if the views don't work?
>
> Greetz,
>
> Kristoff
>
>
> "Toff" <kristoff(dot)six(at)telenet(dot)be> wrote in message
> news:XfwXe(dot)197826$L_7(dot)10628197(at)phobos(dot)telenet-ops(dot)be(dot)(dot)(dot)
> > Hello!
> >
> > I want to create a view of a table that is in several schema's.
> >
> > The table is
> > CREATE TABLE "operator"
> > (
> > "operatorid" INTEGER PRIMARY KEY,
> > "accountid" INTEGER REFERENCES "account"("accountid"),
> > "name" VARCHAR (40),
> > "active" BOOLEAN,
> > );
> >
> > The schema's are "acc1", "acc2", ......
> >
> > The view........
> > CREATE VIEW allops AS
> > SELECT operatorid, accountid, name
> > FROM acc1.operator, acc2.operator
> > WHERE active = true;
> >
> > But I get the "ERROR: column reference "operatorid" is ambiguous"
> > If I remove "operatorid", or "accountid" in the view, the errortype is
> the
> > same.
> >
> > What is the ambiguous thing about this? And how to solve it?
> > On the internet I found some posts with the same issue, but no direct
> > answers.
> >
> > Thanks,
> >
> > Kristoff
> >
>
>
>
>
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>



--
with regards,
S.Gnanavel
Satyam Computer Services Ltd.

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