Re: Proposal for supporting outer joins in 7.1
От | Tom Lane |
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Тема | Re: Proposal for supporting outer joins in 7.1 |
Дата | |
Msg-id | 24165.967390681@sss.pgh.pa.us обсуждение исходный текст |
Ответ на | Re: Proposal for supporting outer joins in 7.1 (Philip Warner <pjw@rhyme.com.au>) |
Ответы |
Re: Proposal for supporting outer joins in 7.1
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Список | pgsql-hackers |
Philip Warner <pjw@rhyme.com.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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