From: | Chris Bitmead <chris(at)bitmead(dot)com> |
---|---|
To: | Postgres Hackers List <hackers(at)postgreSQL(dot)org> |
Subject: | Re: Help with gram.y (UNDER) |
Date: | 2000-05-24 13:49:11 |
Message-ID: | 392BDDD7.B1838271@bitmead.com |
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Lists: | pgsql-hackers |
Chris Bitmead wrote:
>
> It seems like bison is confused by having that '(' just after an
> optional syntax (UNION).
I mean the optional UNDER
> If I place something after OptUnder (USING just
I mean USING;
i.e. CreateStmt: CREATE OptTemp TABLE relation_name OptUnder USING '('
OptTableElementList ')' OptInherit
This will accept "CREATE TABLE foo USING (aa text);"
but this...
CreateStmt: CREATE OptTemp TABLE relation_name OptUnder '('
OptTableElementList ')' OptInherit
won't accept "CREATE TABLE foo (aa text);"
> to pick a token), then everything works fine (except of course the
> spurious USING becomes part of the syntax).
>
> Does the '(' have some kind of second-class status as a token that would
> cause this wierdness?
>
> Chris Bitmead wrote:
> >
> > Can someone give be a bit of help with gram.y to get this UNDER syntax
> > right? I did what I though was the obvious syntax, but it no longer
> > accepts a plain create table after this change...
> >
> > OptUnder: UNDER relation_name_list { $$ = $2; }
> > | /*EMPTY*/ { $$ = NIL; }
> > ;
> >
> > CreateStmt: CREATE OptTemp TABLE relation_name OptUnder '('
> > OptTableElementList ')' OptInherit
> > {
> > /*etc */
> > }
> > ;
> >
> > The full patch is here...
> > ftp://ftp.tech.com.au/pub/diff.x
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