| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Peter Geoghegan <pg(at)heroku(dot)com> |
| Cc: | Robert Haas <robertmhaas(at)gmail(dot)com>, Heikki Linnakangas <hlinnakangas(at)vmware(dot)com>, Noah Misch <noah(at)leadboat(dot)com>, Marti Raudsepp <marti(at)juffo(dot)org>, Stephen Frost <sfrost(at)snowman(dot)net>, Greg Stark <stark(at)mit(dot)edu>, Pg Hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: B-Tree support function number 3 (strxfrm() optimization) |
| Date: | 2014-12-02 22:44:55 |
| Message-ID: | 2820.1417560295@sss.pgh.pa.us |
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| Lists: | pgsql-hackers |
Peter Geoghegan <pg(at)heroku(dot)com> writes:
> On Tue, Dec 2, 2014 at 2:21 PM, Robert Haas <robertmhaas(at)gmail(dot)com> wrote:
>> Right, and what I'm saying is that maybe the "applicability" flag
>> shouldn't be stored in the SortSupport object, but passed down as an
>> argument.
> But then how does that information get to any given sortsupport
> routine? That's the place that really needs to know if abbreviation is
> useful. In general, they're only passed a SortSupport object. Are you
> suggesting revising the signature required of SortSupport routines to
> add that extra flag as an additional argument?
I think that is what he's suggesting, and I too am wondering why it's
a good idea.
regards, tom lane
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