From: | Matt <matt(at)kynx(dot)org> |
---|---|
To: | Greg Stark <gsstark(at)mit(dot)edu> |
Cc: | pgsql-general(at)postgresql(dot)org |
Subject: | Re: OID's |
Date: | 2004-11-16 22:54:29 |
Message-ID: | 1100645669.4227.82.camel@matt.kynx.org |
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Thread: | |
Lists: | pgsql-general |
> How do you make use of this? It seems like you would need your code to know
> which foreign_oid referred to which table to actually perform the join.
Sorry, wasn't very clear about what it does:
select * from mytable t left join joinme j on t.id = j.foreign_id and
t.tableoid = j.foreign_oid;
I use it for 'PostIt note' type data that I want to be able to stick to
any other row in the DB. Keeping the referential integrity is a bit of
extra work, but I'm working on it :)
If you're going the other way, yes, you'll need to find out what tables
are joined to your postit first. But that's easy with:
select foreign_oid::regclass from joinme where...
But back to my original question: are those tableoid's going to suddenly
wrap around?
M
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