From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
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To: | pgsql-hackers(at)postgreSQL(dot)org |
Subject: | Teaching regex operators about collations |
Date: | 2011-04-09 21:40:27 |
Message-ID: | 25631.1302385227@sss.pgh.pa.us |
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Lists: | pgsql-hackers |
Since ILIKE now responds to collations, it would be nice if the
case-insensitive regex operators did too. The hard part of that is
getting the information from src/backend/utils/adt/regexp.c to
src/backend/regex/regc_locale.c. In principle we could probably add
a field to the data structures carried around in the regex library,
but that is looking a bit invasive, and since we share that code with
the Tcl project I'm loath to change it too much. So what I'm thinking
about is just having a couple of static variables in regc_locale.c that
we initialize before each use of the regex library. This is a bit
grotty, but there's no need for the regex library to be re-entrant,
so it wouldn't cause any problems until that improbable day when
somebody succeeds in multi-threading the backend.
Comments?
regards, tom lane
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