mirror of
https://github.com/pgvector/pgvector.git
synced 2026-07-02 18:50:56 +08:00
69 lines
1.8 KiB
SQL
69 lines
1.8 KiB
SQL
SET enable_seqscan = off;
|
|
|
|
-- L2
|
|
|
|
CREATE TABLE t (val halfvec(3));
|
|
INSERT INTO t (val) VALUES ('[0,0,0]'), ('[1,2,3]'), ('[1,1,1]'), (NULL);
|
|
CREATE INDEX ON t USING hnsw (val halfvec_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::halfvec)) 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 halfvec(3));
|
|
INSERT INTO t (val) VALUES ('[0,0,0]'), ('[1,2,3]'), ('[1,1,1]'), (NULL);
|
|
CREATE INDEX ON t USING hnsw (val halfvec_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::halfvec)) t2;
|
|
|
|
DROP TABLE t;
|
|
|
|
-- cosine
|
|
|
|
CREATE TABLE t (val halfvec(3));
|
|
INSERT INTO t (val) VALUES ('[0,0,0]'), ('[1,2,3]'), ('[1,1,1]'), (NULL);
|
|
CREATE INDEX ON t USING hnsw (val halfvec_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::halfvec)) t2;
|
|
|
|
DROP TABLE t;
|
|
|
|
-- L1
|
|
|
|
CREATE TABLE t (val halfvec(3));
|
|
INSERT INTO t (val) VALUES ('[0,0,0]'), ('[1,2,3]'), ('[1,1,1]'), (NULL);
|
|
CREATE INDEX ON t USING hnsw (val halfvec_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::halfvec)) t2;
|
|
|
|
DROP TABLE t;
|
|
|
|
-- dimensions
|
|
|
|
CREATE TABLE t (val halfvec(4000));
|
|
CREATE INDEX ON t USING hnsw (val halfvec_l2_ops);
|
|
DROP TABLE t;
|
|
|
|
CREATE TABLE t (val halfvec(4001));
|
|
CREATE INDEX ON t USING hnsw (val halfvec_l2_ops);
|
|
DROP TABLE t;
|