Re: Why can't you define a table alias on an update?

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От Tom Lane
Тема Re: Why can't you define a table alias on an update?
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Msg-id 2472.1055770941@sss.pgh.pa.us
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Ответ на Re: Why can't you define a table alias on an update?  ("Jim C. Nasby" <jim@nasby.net>)
Ответы Re: Why can't you define a table alias on an update?  (Csaba Nagy <nagy@ecircle-ag.com>)
Re: Why can't you define a table alias on an update?  (nolan@celery.tssi.com)
Re: Why can't you define a table alias on an update?  ("Jim C. Nasby" <jim@nasby.net>)
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"Jim C. Nasby" <jim@nasby.net> writes:
> On Sun, Jun 15, 2003 at 06:36:57PM -0400, Tom Lane wrote:
>> It seems like a reasonable extension, but looking at the grammar just
>> now, I think that we'd have to turn SET from an unreserved keyword to a
>> reserved word to make this work.  Not sure how many peoples' databases
>> that would break ... but we'd probably get a few complaints ...

> Would it be reasonable to have a setting that enabled/disabled this?

No, unless you want to have two complete bison parsers in there.  AFAIK
there's no good way to alter the reserved-word status of a keyword on
the fly.  So either we do it, or not.

I'm not necessarily opposed to doing it, I just wanted to raise a flag
and see if anyone reading this thread would complain.

            regards, tom lane

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