Re: DELETE syntax on JOINS

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От
Andrew Dunstan
Тема
Re: DELETE syntax on JOINS
Дата
Msg-id
4A93EDD2.9050201@dunslane.net
Ответ на
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Дерево обсуждения
DELETE syntax on JOINS Jean-Michel Pouré <jm@poure.com>
Re: DELETE syntax on JOINS Bruce Momjian <bruce@momjian.us>
Re: DELETE syntax on JOINS Alvaro Herrera <alvherre@commandprompt.com>
Re: DELETE syntax on JOINS Bruce Momjian <bruce@momjian.us>
Re: DELETE syntax on JOINS Bill Moran <wmoran@potentialtech.com>
Re: DELETE syntax on JOINS Jean-Michel Pouré <jm@poure.com>
Re: DELETE syntax on JOINS Alvaro Herrera <alvherre@commandprompt.com>
Re: DELETE syntax on JOINS Tom Lane <tgl@sss.pgh.pa.us>
Re: DELETE syntax on JOINS Bruce Momjian <bruce@momjian.us>
Re: DELETE syntax on JOINS Josh Berkus <josh@agliodbs.com>
Re: DELETE syntax on JOINS Bruce Momjian <bruce@momjian.us>
Re: DELETE syntax on JOINS Robert Haas <robertmhaas@gmail.com>
Re: DELETE syntax on JOINS Tom Lane <tgl@sss.pgh.pa.us>
Re: DELETE syntax on JOINS Greg Stark <gsstark@mit.edu>
Re: DELETE syntax on JOINS Tom Lane <tgl@sss.pgh.pa.us>
Re: DELETE syntax on JOINS Andrew Dunstan <andrew@dunslane.net>
Re: DELETE syntax on JOINS Tom Lane <tgl@sss.pgh.pa.us>
Re: DELETE syntax on JOINS Robert Haas <robertmhaas@gmail.com>
Re: DELETE syntax on JOINS Tom Lane <tgl@sss.pgh.pa.us>
Re: DELETE syntax on JOINS Sam Mason <sam@samason.me.uk>
Re: DELETE syntax on JOINS Bruce Momjian <bruce@momjian.us>


Tom Lane wrote:
> Robert Haas  writes:
>   
>> On Mon, Aug 24, 2009 at 9:31 PM, Josh Berkus 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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