Re: Possible to emulate pre-8.2 behaviour of SET CONSTRAINTS?

"Simon Kinsella" <simon@bluefiresystems.co.uk> writes:
> My system currently runs on PostgreSQL 8.1 and makes use of the old
> behaviour of SET CONSTRAINTS, namely that the command is applied to all
> constraints that match the specified name.

Unfortunately that was pretty far away from what the SQL spec says :-(

> This makes it very easy to write
> a general-case function that can change the DEFERRED mode on a given
> constraint that is present in several similar schemas (sounds odd maybe but
> it works very well in my case!). 

I think you could do it fairly easily still, eg
for rec in select nspname from pg_namespace n join pg_constraint c on n.oid = c.connamespace where conname = $1 loop
     execute 'set constraints ' || quote_ident(rec.nspname) || '.' || quote_ident($1) || ' immediate';       end loop;
 

Exceedingly untested, but something close to this seems like it'd solve
your problem.
        regards, tom lane