Re: Progress on fast path sorting, btree index creation time

From: Bruce Momjian <bruce(at)momjian(dot)us>
To: Peter Geoghegan <peter(at)2ndquadrant(dot)com>
Cc: Robert Haas <robertmhaas(at)gmail(dot)com>, Noah Misch <noah(at)leadboat(dot)com>, Jay Levitt <jay(dot)levitt(at)gmail(dot)com>, Jim Decibel! Nasby <decibel(at)decibel(dot)org>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, PG Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Progress on fast path sorting, btree index creation time
Date: 2012-02-09 17:16:20
Message-ID: 20120209171620.GA22355@momjian.us
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On Thu, Feb 09, 2012 at 03:36:23PM +0000, Peter Geoghegan wrote:
> On 9 February 2012 14:51, Robert Haas <robertmhaas(at)gmail(dot)com> wrote:
> > I'm not sure I entirely follow all this, but I'll look at the code
> > once you have it.  Are you saying that all the comparetup_yadda
> > functions are redundant to each other in the single-key case?
>
> Yes, I am. The main reason that the loops exist in those functions
> (which is the only way that they substantially differ) is because they
> each have to get the other keys through various ways that characterise
> the tuple class that they encapsulate (index_getattr(),
> heap_getattr(), etc).

Does this help all types for sorting, including strings?

--
Bruce Momjian <bruce(at)momjian(dot)us> http://momjian.us
EnterpriseDB http://enterprisedb.com

+ It's impossible for everything to be true. +

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