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234a02b2a8
Get rid of VARATT_SIZE and VARATT_DATA, which were simply redundant with VARSIZE and VARDATA, and as a consequence almost no code was using the longer names. Rename the length fields of struct varlena and various derived structures to catch anyplace that was accessing them directly; and clean up various places so caught. In itself this patch doesn't change any behavior at all, but it is necessary infrastructure if we hope to play any games with the representation of varlena headers. Greg Stark and Tom Lane
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;