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Re: patch: bytea_agg

From: "Kevin Grittner" <Kevin(dot)Grittner(at)wicourts(dot)gov>
To: "Robert Haas" <robertmhaas(at)gmail(dot)com>, "Peter Eisentraut" <peter_e(at)gmx(dot)net>
Cc: "Pavel Stehule" <pavel(dot)stehule(at)gmail(dot)com>, "PostgreSQL Hackers" <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: patch: bytea_agg
Date: 2011-12-23 19:35:21
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-hackers
Robert Haas <robertmhaas(at)gmail(dot)com> wrote:
> Peter Eisentraut <peter_e(at)gmx(dot)net> wrote:
>> Robert Haas wrote:
>>> Peter Eisentraut <peter_e(at)gmx(dot)net> wrote:
>>>> On ons, 2011-12-21 at 11:04 +0100, Pavel Stehule wrote:
>>>>> this patch adds a bytea_agg aggregation.
>>>>> It allow fast bytea concatetation.
>>>> Why not call it string_agg?  All the function names are the
>>>> same between text and bytea (e.g., ||, substr, position,
>>>> length).  It would be nice not to introduce arbitrary
>>>> differences.
>>> Well, because it doesn't operate on strings.
>> Sure, binary strings.  Both the SQL standard and the PostgreSQL
>> documentation use that term.
> I'm unimpressed by that argument, but let's see what other people
> think.
I, for one, try to be consistent about saying "character strings"
when that is what I mean.  Since at least the SQL-92 standard there
have been both "character strings" and "bit strings", with a certain
amount of symmetry in how they are handled.   I don't remember when
binary strings were introduced, but that is the standard
terminology.  There is, for example, a standard substring function
for binary strings.

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