Re: DELETE syntax on JOINS
От | Andrew Dunstan |
---|---|
Тема | Re: DELETE syntax on JOINS |
Дата | |
Msg-id | 4A93EDD2.9050201@dunslane.net обсуждение исходный текст |
Ответ на | Re: DELETE syntax on JOINS (Tom Lane <tgl@sss.pgh.pa.us>) |
Список | pgsql-hackers |
Tom Lane wrote: > Robert Haas <robertmhaas@gmail.com> writes: > >> On Mon, Aug 24, 2009 at 9:31 PM, Josh Berkus<josh@agliodbs.com> wrote: >> >>> What I don't get is why this is such a usability issue. Subqueries in >>> DELETE FROM work perfectly well, and provide more flexibility than most >>> users know what to do with. >>> > > >> It's both a usability issue and a performance issue. >> > > On the usability front: if we were to take the position Josh advocates, > we should never have added FROM/USING to UPDATE/DELETE at all FWIW, I use update ... from a lot - it make many update queries easier and less error prone to write - but I rarely find I need delete ... using. > ... but > since we did, I think we should try to make it as flexible as the > corresponding feature in other DBMSes. > > > +1 cheers andrew
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