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From: Tom Lane <tgl@sss.pgh.pa.us>
To: David Rowley <david.rowley@2ndquadrant.com>
Cc: Jesper Pedersen <jesper.pedersen@redhat.com>
Cc: Andres Freund <andres@anarazel.de>
Cc: Robert Haas <robertmhaas@gmail.com>
Cc: PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>
Subject: Re: POC: converting Lists into arrays
Date: Mon, 15 Jul 2019 23:07:38 -0400
Message-ID: <2420.1563246458@sss.pgh.pa.us> (raw)
In-Reply-To: <CAKJS1f_0nc8gk_6bLxQKsFt5os3UCk2MNsNcpva6LJoSoqFm=w@mail.gmail.com>
References: <481.1551390571@sss.pgh.pa.us>
	<24783.1551568303@sss.pgh.pa.us>
	<20190303043424.itzy3ge52xrkpmpr@alap3.anarazel.de>
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	<CA+TgmoZM4c=v0ifR++i09JFtNtnqTq_HkFmbFjwWqbUJffOLmA@mail.gmail.com>
	<12684.1551723095@sss.pgh.pa.us>
	<20190304190612.vgqqsowzkrh22623@alap3.anarazel.de>
	<26464.1551734920@sss.pgh.pa.us>
	<20190304221101.hdg4vj5fo4eewh3b@alap3.anarazel.de>
	<CAKJS1f-pNfoUJrmU8vgD1WrKLqs9WxOVLQ0RpSWu9h6W9RnypA@mail.gmail.com>
	<20190304235402.nod3gbotk2qtd4nh@alap3.anarazel.de>
	<CAKJS1f-yS201hAAmnxcLb2aeTYNZ_A9R1JNXF6hTVXjhHYN7rQ@mail.gmail.com>
	<1131.1551746172@sss.pgh.pa.us>
	<14626.1558745627@sss.pgh.pa.us>
	<29297.1558799327@sss.pgh.pa.us>
	<f078ce63-9e04-0f3e-d200-d7ee66279abe@redhat.com>
	<25178.1562006685@sss.pgh.pa.us>
	<25258.1562023641@sss.pgh.pa.us>
	<CAKJS1f9RUaLrujzpqf15gg_7Wo9-ai7b3-MR=bMH7a-pOWdeZA@mail.gmail.com>
	<2305.1562181615@sss.pgh.pa.us>
	<29361.1563220190@sss.pgh.pa.us>
	<CAKJS1f_0nc8gk_6bLxQKsFt5os3UCk2MNsNcpva6LJoSoqFm=w@! mail.gmail.com>

David Rowley <david.rowley@2ndquadrant.com> writes:
> The only thoughts I have so far here are that it's a shame that the
> function got called list_qsort() and not just list_sort().  I don't
> see why callers need to know anything about the sort algorithm that's
> being used.

Meh.  list_qsort() is quicksort only to the extent that qsort()
is quicksort, which in our current implementation is a bit of a
lie already --- and, I believe, it's much more of a lie in some
versions of libc.  I don't really think of either name as promising
anything about the underlying sort algorithm.  What they do share
is an API based on a callback comparison function, and if you are
looking for uses of those, it's a lot easier to grep for "qsort"
than some more-generic term.

			regards, tom lane





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