Re: MULTISET and additional functions for ARRAY

From: David Fetter <david(at)fetter(dot)org>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: Itagaki Takahiro <itagaki(dot)takahiro(at)gmail(dot)com>, Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: MULTISET and additional functions for ARRAY
Date: 2010-11-15 19:14:37
Message-ID: 20101115191437.GB22943@fetter.org
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On Mon, Nov 15, 2010 at 10:13:40AM -0500, Tom Lane wrote:
> Itagaki Takahiro <itagaki(dot)takahiro(at)gmail(dot)com> writes:
> > Another issue for sorting is that we have 4 kinds of sorting: ASC/DESC
> > and NULLS FIRST/LAST.
>
> We have a lot more kinds than that. See USING.

USING pretty much gives us no chance of optimizing at all. Could we
maybe see about optimizing the 99% case, which those two bits cover?

Cheers,
David.
--
David Fetter <david(at)fetter(dot)org> http://fetter.org/
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