| From: | Teodor Sigaev <teodor(at)sigaev(dot)ru> |
|---|---|
| To: | "David E(dot) Wheeler" <david(at)kineticode(dot)com> |
| Cc: | Zdenek Kotala <Zdenek(dot)Kotala(at)Sun(dot)COM>, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: PATCH: CITEXT 2.0 |
| Date: | 2008-07-03 07:19:26 |
| Message-ID: | 486C7D7E.5080505@sigaev.ru |
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| Thread: | |
| Lists: | pgsql-hackers |
> Douglass book, though I probably missed it. Anyone got a link for me to
> read to make it happen?
Hash opclass is 5-times simpler that btree one :)
CREATE FUNCTION citext_hash(mchar)
RETURNS int4
AS 'MODULE_PATHNAME'
LANGUAGE C IMMUTABLE RETURNS NULL ON NULL INPUT;
CREATE OPERATOR CLASS citext_ops
DEFAULT FOR TYPE mchar USING hash AS
OPERATOR 1 = (citext, citext),
FUNCTION 1 citext_hash(citext);
--
Teodor Sigaev E-mail: teodor(at)sigaev(dot)ru
WWW: http://www.sigaev.ru/
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