mirror of
https://github.com/pgvector/pgvector.git
synced 2026-06-06 05:51:21 +08:00
110 lines
2.8 KiB
SQL
110 lines
2.8 KiB
SQL
SET enable_seqscan = off;
|
|
|
|
-- L2
|
|
|
|
CREATE TABLE t (val vector(3));
|
|
INSERT INTO t (val) VALUES ('[0,0,0]'), ('[1,2,3]'), ('[1,1,1]'), (NULL);
|
|
CREATE INDEX ON t USING hnsw (val vector_l2_ops);
|
|
|
|
INSERT INTO t (val) VALUES ('[1,2,4]');
|
|
|
|
SELECT * FROM t ORDER BY val <-> '[3,3,3]';
|
|
SELECT COUNT(*) FROM (SELECT * FROM t ORDER BY val <-> (SELECT NULL::vector)) t2;
|
|
SELECT COUNT(*) FROM t;
|
|
|
|
TRUNCATE t;
|
|
SELECT * FROM t ORDER BY val <-> '[3,3,3]';
|
|
|
|
DROP TABLE t;
|
|
|
|
-- inner product
|
|
|
|
CREATE TABLE t (val vector(3));
|
|
INSERT INTO t (val) VALUES ('[0,0,0]'), ('[1,2,3]'), ('[1,1,1]'), (NULL);
|
|
CREATE INDEX ON t USING hnsw (val vector_ip_ops);
|
|
|
|
INSERT INTO t (val) VALUES ('[1,2,4]');
|
|
|
|
SELECT * FROM t ORDER BY val <#> '[3,3,3]';
|
|
SELECT COUNT(*) FROM (SELECT * FROM t ORDER BY val <#> (SELECT NULL::vector)) t2;
|
|
|
|
DROP TABLE t;
|
|
|
|
-- cosine
|
|
|
|
CREATE TABLE t (val vector(3));
|
|
INSERT INTO t (val) VALUES ('[0,0,0]'), ('[1,2,3]'), ('[1,1,1]'), (NULL);
|
|
CREATE INDEX ON t USING hnsw (val vector_cosine_ops);
|
|
|
|
INSERT INTO t (val) VALUES ('[1,2,4]');
|
|
|
|
SELECT * FROM t ORDER BY val <=> '[3,3,3]';
|
|
SELECT COUNT(*) FROM (SELECT * FROM t ORDER BY val <=> '[0,0,0]') t2;
|
|
SELECT COUNT(*) FROM (SELECT * FROM t ORDER BY val <=> (SELECT NULL::vector)) t2;
|
|
|
|
DROP TABLE t;
|
|
|
|
-- L1
|
|
|
|
CREATE TABLE t (val vector(3));
|
|
INSERT INTO t (val) VALUES ('[0,0,0]'), ('[1,2,3]'), ('[1,1,1]'), (NULL);
|
|
CREATE INDEX ON t USING hnsw (val vector_l1_ops);
|
|
|
|
INSERT INTO t (val) VALUES ('[1,2,4]');
|
|
|
|
SELECT * FROM t ORDER BY val <+> '[3,3,3]';
|
|
SELECT COUNT(*) FROM (SELECT * FROM t ORDER BY val <+> (SELECT NULL::vector)) t2;
|
|
|
|
DROP TABLE t;
|
|
|
|
-- iterative
|
|
|
|
CREATE TABLE t (val vector(3));
|
|
INSERT INTO t (val) VALUES ('[0,0,0]'), ('[1,2,3]'), ('[1,1,1]'), (NULL);
|
|
CREATE INDEX ON t USING hnsw (val vector_l2_ops);
|
|
|
|
SET hnsw.iterative_search = strict_order;
|
|
SET hnsw.ef_search = 1;
|
|
SELECT * FROM t ORDER BY val <-> '[3,3,3]';
|
|
|
|
SET hnsw.iterative_search = relaxed_order;
|
|
SELECT * FROM t ORDER BY val <-> '[3,3,3]';
|
|
|
|
RESET hnsw.iterative_search;
|
|
RESET hnsw.ef_search;
|
|
DROP TABLE t;
|
|
|
|
-- unlogged
|
|
|
|
CREATE UNLOGGED TABLE t (val vector(3));
|
|
INSERT INTO t (val) VALUES ('[0,0,0]'), ('[1,2,3]'), ('[1,1,1]'), (NULL);
|
|
CREATE INDEX ON t USING hnsw (val vector_l2_ops);
|
|
|
|
SELECT * FROM t ORDER BY val <-> '[3,3,3]';
|
|
|
|
DROP TABLE t;
|
|
|
|
-- options
|
|
|
|
CREATE TABLE t (val vector(3));
|
|
CREATE INDEX ON t USING hnsw (val vector_l2_ops) WITH (m = 1);
|
|
CREATE INDEX ON t USING hnsw (val vector_l2_ops) WITH (m = 101);
|
|
CREATE INDEX ON t USING hnsw (val vector_l2_ops) WITH (ef_construction = 3);
|
|
CREATE INDEX ON t USING hnsw (val vector_l2_ops) WITH (ef_construction = 1001);
|
|
CREATE INDEX ON t USING hnsw (val vector_l2_ops) WITH (m = 16, ef_construction = 31);
|
|
|
|
SHOW hnsw.ef_search;
|
|
|
|
SET hnsw.ef_search = 0;
|
|
SET hnsw.ef_search = 1001;
|
|
|
|
SHOW hnsw.iterative_search;
|
|
|
|
SET hnsw.iterative_search = on;
|
|
|
|
SHOW hnsw.max_search_tuples;
|
|
|
|
SET hnsw.max_search_tuples = -2;
|
|
|
|
DROP TABLE t;
|