Re: OID Usage

On Fri, Jan 14, 2005 at 05:10:10PM -0300, Alvaro Herrera wrote:
> On Fri, Jan 14, 2005 at 12:20:50PM -0700, Michael Fuhr wrote:
> > On Fri, Jan 14, 2005 at 07:44:18PM +0100, Bo Lorentsen wrote:
> > > Alvaro Herrera wrote:
> > >
> > > >You can create a function to get the sequence name attached to a table.
> > > >Of course, you should take into account the fact that there could be
> > > >more than one (two serial fields in a table are rare but not
> > > >impossible), but if your tables have only one sequence you should be OK.
> > > >
> > > Are there a way to find and test if it is a primary key ?
> >
> > pg_index has an indisprimary column.
>
> Yeah, though things get hairy that way because you have to peek at
> pg_attribute to match the objsubid in pg_depend; and self-join pg_class
> to get to the index itself. Not sure if it all can be done in a single
> query.

If you do manage to write a function that will do this I hope you can
share it with the community. IMHO PostgreSQL could do with more
functions for querying the system catalogs.
--
Jim C. Nasby, Database Consultant decibel(at)decibel(dot)org
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