Re: Boolean operators without commutators vs. ALL/ANY

From: Florian Pflug <fgp(at)phlo(dot)org>
To: Ross J(dot) Reedstrom <reedstrm(at)rice(dot)edu>
Cc: pgsql-hackers(at)postgresql(dot)org
Subject: Re: Boolean operators without commutators vs. ALL/ANY
Date: 2011-06-17 15:21:10
Message-ID: AEC499CF-17CB-41ED-907D-00D34293CDEA@phlo.org
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On Jun17, 2011, at 17:15 , Ross J. Reedstrom wrote:
> On Fri, Jun 17, 2011 at 10:20:04AM -0400, Alvaro Herrera wrote:
>> Excerpts from Florian Pflug's message of vie jun 17 10:03:56 -0400 2011:
>>
>>> How is that worse than the situation with "=~" and "~="?
>>
>> With =~ it is to the right, with ~= it is to the left.
>
> To throw my user opinion into this ring (as a long time user of regexes
> in many different systems) I've always taken the ~ to be short hand for
> the 'approximately' notation (a squiggly equals) which has good semantic
> match in my mind: a regex match is sort of a fuzzy equality. With that
> model, the suggested pair is fairly mnemonic - the 'fuzzy' part i(the
> pattern) is next to the squiggles, the 'concrete' part goes by the
> equals.

Hey, that's my mnemonic device! ;-)

best regards,
Florian Pflug

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