Re: ANY/SOME/ALL with noncommutable operators - Mailing list pgsql-hackers

From David Fetter
Subject Re: ANY/SOME/ALL with noncommutable operators
Date
Msg-id 20080619131132.GB30331@fetter.org
Whole thread Raw
In response to ANY/SOME/ALL with noncommutable operators  (Peter Eisentraut <peter_e@gmx.net>)
List pgsql-hackers
On Thu, Jun 19, 2008 at 11:31:02AM +0200, Peter Eisentraut wrote:
> I can do
> 
> 'abc' LIKE ANY (ARRAY['a%','b%'])
> 
> but not
> 
> ANY (ARRAY['abc', 'def']) LIKE '%a'
> 
> This seems to be a failing in the SQL standard. You can work around
> this by creating your own operators, but maybe there should be a
> general solution, as there are a lot of noncommutable operators and
> this example doesn't seem all that unuseful in practice.
> 
> Comments?

It's been proposed several times before, at least once by Yours Truly,
without objections.  I seem to recall it's a SMOP.

Cheers,
David.
-- 
David Fetter <david@fetter.org> http://fetter.org/
Phone: +1 415 235 3778  AIM: dfetter666  Yahoo!: dfetter
Skype: davidfetter      XMPP: david.fetter@gmail.com

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