Re: [HACKERS] Refactoring identifier checks to consistently use strcmp

From: Michael Paquier <michael(dot)paquier(at)gmail(dot)com>
To: Daniel Gustafsson <daniel(at)yesql(dot)se>
Cc: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Robert Haas <robertmhaas(at)gmail(dot)com>, Heikki Linnakangas <hlinnaka(at)iki(dot)fi>, Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: [HACKERS] Refactoring identifier checks to consistently use strcmp
Date: 2017-11-28 01:07:15
Message-ID: CAB7nPqS8PUOn+qBo4gSSkuU8=gDUGzmGs8FA_sTZOdVgMDfMKA@mail.gmail.com
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On Tue, Nov 28, 2017 at 12:11 AM, Daniel Gustafsson <daniel(at)yesql(dot)se> wrote:
>> The patch needs a rebase, and there are a couple of places that need
>> an extra lookup I think:
>> $ git grep defname -- *.c | grep strcasecmp | wc -l
>> 39
>
> Rebased and handled a few more places which I had either missed in the last
> round, or that had been added in the meantime. “PARALLEL” in aggregatecmds.c
> is intentionally using pg_strcasecmp() due to the old-style syntax which is
> still supported.

This meritates a comment. Code readers may get confused.

> AFAICS this covers all relevant codepaths from the 39 above.

I was just looking at the tsearch code which uses pg_strcmpcase, and
those are defined with makeDefElem() so you should switch to strcmp in
this case as well, no? If I patch the code myself I would get an error
when double-quoting, making those command more consistent with the
rest of what you are patching here:
create extension unaccent;
alter text search dictionary unaccent (Rules = 'unaccent'); -- ok
alter text search dictionary unaccent (RuLes = 'unaccent'); -- ok
alter text search dictionary unaccent ("Rules" = 'unaccent'); -- error
--
Michael

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