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Thread: A simple question (under pressure :-))....

A simple question (under pressure :-))....

From
John Wells
Date:
Guys,

I have approx. 8 hours to finish a deadline, so I can no longer spend time searching google...haven't found the answer
yet.

In PG, is there not a way to select amongst databases?

In other words, if I have one schema called sch1 and another called sch2, and I'm connected to sch2, could I not do:

select fieldname from sch1.tablename

I'm running 7.2.3, so I think there was no such things as a schema in this release...just a database, but can't recall.
 

It seems I've been able to do this in the past, but I may be remembering wrong.

Thanks!
John

Re: A simple question (under pressure :-))....

From
Doug McNaught
Date:
John Wells <jb@sourceillustrated.com> writes:

> Guys,
>
> I have approx. 8 hours to finish a deadline, so I can no longer spend time searching google...haven't found the
answeryet. 
>
> In PG, is there not a way to select amongst databases?
>
> In other words, if I have one schema called sch1 and another called sch2, and I'm connected to sch2, could I not do:
>
> select fieldname from sch1.tablename
>
> I'm running 7.2.3, so I think there was no such things as a schema in this release...just a database, but can't
recall.  

Right.  Schemas went into 7.3.  You can try 'contrib/dblink' for
cross-database queries in earlier versions--it might or might not work
for you (I've never used it myself).

> It seems I've been able to do this in the past, but I may be
> remembering wrong.

Maybe that was with 7.3 or 7.4?

-Doug

Re: A simple question (under pressure :-))....

From
Csaba Nagy
Date:
Hi John,

Short answer: you can do cross-schema queries, you can't (easily) do
cross database queries.

Check out this:
http://www.postgresql.org/docs/7.4/static/ddl.html
, the schema section:
http://www.postgresql.org/docs/7.4/static/ddl-schemas.html

I'm not sure when schemas were introduced, but I suppose you want to use
the latest postgres version.

Cheers,
Csaba.

On Mon, 2004-03-01 at 02:37, John Wells wrote:
> Guys,
>
> I have approx. 8 hours to finish a deadline, so I can no longer spend time searching google...haven't found the
answeryet. 
>
> In PG, is there not a way to select amongst databases?
>
> In other words, if I have one schema called sch1 and another called sch2, and I'm connected to sch2, could I not do:
>
> select fieldname from sch1.tablename
>
> I'm running 7.2.3, so I think there was no such things as a schema in this release...just a database, but can't
recall.  
>
> It seems I've been able to do this in the past, but I may be remembering wrong.
>
> Thanks!
> John
>
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