Re: [HACKERS] recursive views
От | Bruce Momjian |
---|---|
Тема | Re: [HACKERS] recursive views |
Дата | |
Msg-id | 199804161722.NAA22932@candle.pha.pa.us обсуждение исходный текст |
Ответ на | recursive views (Michael Meskes <meskes@topsystem.de>) |
Список | pgsql-hackers |
> > I had some time during vacation to thing about postgresql. And here's the > feature I'd really like to see. This one would put us miles in front of all > others: recursive view definitions. > > Just one short example: > > There is that well-known parent relation: par (parent, child). The view anc > now should list all ancestors: > > create view anc as > select parent as ancestor, child as person from par > union > select anc.ancestor as ancestor, par.child as person > from anc, par > where anc.person = par.parent; > > What do you guys think of this idea? How much work would it be to implement > it? Ah, you want views of UNION's, and want to specify the view in the query. Yikes, no idea on how hard that would be. -- Bruce Momjian | 830 Blythe Avenue maillist@candle.pha.pa.us | Drexel Hill, Pennsylvania 19026 + If your life is a hard drive, | (610) 353-9879(w) + Christ can be your backup. | (610) 853-3000(h)
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