Re: CREATE FOREGIN TABLE LACUNA

From: David Fetter <david(at)fetter(dot)org>
To: Alvaro Herrera <alvherre(at)commandprompt(dot)com>
Cc: Robert Haas <robertmhaas(at)gmail(dot)com>, Pg Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: CREATE FOREGIN TABLE LACUNA
Date: 2012-03-23 19:07:02
Message-ID: 20120323190702.GA30458@fetter.org
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On Fri, Mar 23, 2012 at 11:38:56AM -0700, David Fetter wrote:
> On Thu, Mar 15, 2012 at 11:23:43AM -0300, Alvaro Herrera wrote:
> > Excerpts from David Fetter's message of jue mar 15 02:28:28 -0300 2012:
> > > On Wed, Mar 14, 2012 at 12:06:20PM -0400, Robert Haas wrote:
> > > > On Wed, Mar 14, 2012 at 10:22 AM, David Fetter <david(at)fetter(dot)org> wrote:
> > > > >> I think that instead of inventing new grammar productions and a new
> > > > >> node type for this, you should just reuse the existing productions for
> > > > >> LIKE clauses and then reject invalid options during parse analysis.
> > > > >
> > > > > OK.  Should I first merge CREATE FOREIGN TABLE with CREATE TABLE and
> > > > > submit that as a separate patch?
> > > >
> > > > I don't see any reason to do that. I merely meant that you could
> > > > reuse TableLikeClause or maybe even TableElement in the grammer for
> > > > CreateForeignTableStmt.
> > >
> > > Next WIP patch attached implementing this via reusing TableLikeClause
> > > and refactoring transformTableLikeClause().
> > >
> > > What say?
> >
> > Looks much better to me, but the use of strcmp() doesn't look good.
> > ISTM that stmtType is mostly used for error messages. I think you
> > should add some kind of identifier (such as the original parser Node)
> > into the CreateStmtContext so that you can do a IsA() test instead -- a
> > bit more invasive as a patch, but much cleaner.
> >
> > Also the error messages need more work.
>
> How about this one?

Oops, forgot to put the latest docs in.

Cheers,
David.
--
David Fetter <david(at)fetter(dot)org> http://fetter.org/
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