Vik Reykja <vikrey...@gmail.com> writes:
> On Sun, Feb 19, 2012 at 05:03, Robert Haas <robertmh...@gmail.com> wrote:
>> On Sat, Feb 18, 2012 at 10:38 PM, Vik Reykja <vikrey...@gmail.com> wrote:
>>> Does it make sense for regexps to have collations?
>> As I understand it, collations determine the sort-ordering of strings.
>> Regular expressions don't care about that. Why do you ask?
> Perhaps I used the wrong term, but I was thinking the locale could tell us
> what alphabet we're dealing with. So a regexp using en_US would give
> different word-boundary results from one using zh_CN.
Our interpretation of a "collation" is that it sets both LC_COLLATE and
LC_CTYPE. Regexps may not care about the first but they definitely care
about the second. This is why the stuff in regc_pg_locale.c pays
attention to collation.
regards, tom lane
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