Re: CREATE SCHEMA IF NOT EXISTS

Alvaro Herrera <alvherre(at)2ndquadrant(dot)com> writes:
> Excerpts from David E. Wheeler's message of mar oct 02 16:16:37 -0300 2012:
>> On Oct 2, 2012, at 12:08 PM, Alvaro Herrera <alvherre(at)2ndquadrant(dot)com> wrote:
>>> create schema if not exists foo create table first (a int);
>>> create schema if not exists foo create table second (a int);
>>>
>>> As far as I can see, with the patch as it currently stands, you would
>>> end up with only table "first" in the schema, which seems very
>>> surprising to me.

>> Yeah, I think the second should die. CINE should only work if there are no other objects created as part of the statement, IMHO.

> Well, if that's the rationale then you end up with no schema foo at all
> (i.e. both die), which seems even more surprising (though I admit it has
> the advantage of being a simple rule to document.)

I think we should just disallow putting any contained objects in the
statement when IF NOT EXISTS is used. It's simple to understand, simple
to document and implement, and I think it covers all the sane use-cases
anyway.

regards, tom lane