29th September 2022: PostgreSQL 15 RC 1 Released!
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F.4. btree_gist

btree_gist provides sample GiST operator classes that implement B-tree equivalent behavior for the data types int2, int4, int8, float4, float8, numeric, timestamp with time zone, timestamp without time zone, time with time zone, time without time zone, date, interval, oid, money, char, varchar, text, bytea, bit, varbit, macaddr, inet, and cidr.

In general, these operator classes will not outperform the equivalent standard B-tree index methods, and they lack one major feature of the standard B-tree code: the ability to enforce uniqueness. However, they are useful for GiST testing and as a base for developing other GiST operator classes.

F.4.1. Example usage

CREATE TABLE test (a int4);
-- create index
CREATE INDEX testidx ON test USING gist (a);
-- query
SELECT * FROM test WHERE a < 10;

F.4.2. Authors

Teodor Sigaev () , Oleg Bartunov (), and Janko Richter (). See http://www.sai.msu.su/~megera/postgres/gist/ for additional information.