postgresql/contrib/btree_gist/README.btree_gist

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This is a B-Tree implementation using GiST that supports the int2, int4,
int8, float4, float8 timestamp with/without time zone, time
with/without time zone, date, interval, oid, money, macaddr, char,
varchar/text, bytea, numeric, bit, varbit and inet/cidr types.
All work was done by Teodor Sigaev (teodor@stack.net) , Oleg Bartunov
(oleg@sai.msu.su), Janko Richter (jankorichter@yahoo.de).
See http://www.sai.msu.su/~megera/postgres/gist for additional
information.
NEWS:
Apr 17, 2004 - Performance optimizing
Jan 21, 2004 - add support for bytea, numeric, bit, varbit, inet/cidr
Jan 17, 2004 - Reorganizing code and add support for char, varchar/text
Jan 10, 2004 - btree_gist now support oid , timestamp with time zone ,
time with and without time zone, date , interval
money, macaddr
Feb 5, 2003 - btree_gist now support int2, int8, float4, float8
NOTICE:
This version will only work with PostgreSQL version 7.4 and above
because of changes in the system catalogs and the function call
interface.
If you want to index varchar attributes, you have to index using
the function text(<varchar>):
Example:
CREATE TABLE test ( a varchar(23) );
CREATE INDEX testidx ON test USING GIST ( text(a) );
INSTALLATION:
gmake
gmake install
-- load functions
psql <database> < btree_gist.sql
REGRESSION TEST:
gmake installcheck
EXAMPLE USAGE:
create table test (a int4);
-- create index
create index testidx on test using gist (a);
-- query
select * from test where a < 10;