On Tue, 2008-10-07 at 08:30 -0400, Andrew Dunstan wrote:
> Simon Riggs wrote:
> >
> > My main focus is on these commands
> > * CREATE TRIGGER
> > * ALTER TABLE .. ADD PRIMARY KEY
> > * ALTER TABLE .. ADD FOREIGN KEY
> >
> > because those are the most painful ones. We could make it work against
> > more, but we'd need to rewrite lots and lots of catalog update code.
> Anything that scans the table is a prime candidate. In particular, for
> parallel pg_dump, ALTER TABLE ... ADD UNIQUE is important, as well as
> possibly other table constraints.
Yes, I should have mentioned: today's patch (v5) does ADD UNIQUE also.
I tested a concurrent mix of ALTER PK, FK and CREATE INDEX, all fine.
-- Simon Riggs www.2ndQuadrant.comPostgreSQL Training, Services and Support