From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
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To: | Philip Warner <pjw(at)rhyme(dot)com(dot)au> |
Cc: | pgsql-hackers(at)postgreSQL(dot)org |
Subject: | Re: Proposal for supporting outer joins in 7.1 |
Date: | 2000-08-27 15:38:01 |
Message-ID: | 24165.967390681@sss.pgh.pa.us |
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Lists: | pgsql-hackers |
Philip Warner <pjw(at)rhyme(dot)com(dot)au> writes:
>> SELECT ... FROM (a cross join b) cross join c
> I'm not sure whether the above is the syntax you plan to use, but it looks
> a little too much like:
> SELECT ... FROM (select * from a cross join b) as z cross join c
> which has a quite different meaning to any kind of outer join,
Huh? AFAIK they mean exactly the same thing, modulo a few issues about
visibility of columns. In any case you'll have to take your complaint
to ISO, because that's what the spec says the syntaxes are.
> I don;t think that support for this kind of query is implemented,
Not yet, but it's certainly on the TODO list. I'm not seriously
thinking about getting subselect-in-FROM done in this go-round,
though.
regards, tom lane
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