Re: @ versus ~, redux

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От
Zeugswetter Andreas DCP SD
Тема
Re: @ versus ~, redux
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Msg-id
E1539E0ED7043848906A8FF995BDA579014DC301@m0143.s-mxs.net
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Re: @ versus ~, redux Andrew - Supernews <andrew+nonews@supernews.com>
Re: @ versus ~, redux Tom Lane <tgl@sss.pgh.pa.us>
Re: @ versus ~, redux Jeff Davis <pgsql@j-davis.com>
Re: @ versus ~, redux Tom Lane <tgl@sss.pgh.pa.us>
Re: @ versus ~, redux Jeff Davis <pgsql@j-davis.com>
Re: @ versus ~, redux "Zeugswetter Andreas DCP SD" <ZeugswetterA@spardat.at>
Re: @ versus ~, redux Bruce Momjian <bruce@momjian.us>
Re: @ versus ~, redux Tom Lane <tgl@sss.pgh.pa.us>
Re: @ versus ~, redux Matteo Beccati <php@beccati.com>
Re: @ versus ~, redux Michael Glaesemann <grzm@seespotcode.net>
Re: @ versus ~, redux Tom Lane <tgl@sss.pgh.pa.us>

> >> The existing geometric containment tests seem to be nonstrict, so
if 
> >> we wanted to leave room to add strict ones later, it might be best
to 
> >> settle on
> >> 
> >> x @>= y		x contains or equals y
> >> x <=@ y		x is contained in or equals y
> >> 
> >> reserving @> and <@ for future strict comparison operators.
> 
> > At first glace, it seems more intuitive to me to do:
> 
> > 	x @>= y		x contains or equals y
> > 	x =<@ y		y is contained in or equals y
> 
> Hm, I've never seen anyone spell "less than or equal to" as 
> "=<", so I'm not sure where you derive "=<@" from?  Not 
> saying "no", but the other seems clearer to me.

Yes, but to me too =<@ seems more natural since we started with @> and
<@.
Tom, your argument would more match your original @> and @<, but then it

would imply @>= and @<=, imho.

Andreas

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