mirror of
https://github.com/pgvector/pgvector.git
synced 2026-07-01 18:21:16 +08:00
29 lines
560 B
Plaintext
29 lines
560 B
Plaintext
SET client_min_messages = warning;
|
|
CREATE EXTENSION IF NOT EXISTS vector;
|
|
SET enable_seqscan = off;
|
|
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 ivfflat (val) WITH (lists = 1);
|
|
INSERT INTO t (val) VALUES ('[1,2,4]');
|
|
SELECT * FROM t ORDER BY val <-> '[3,3,3]';
|
|
val
|
|
---------
|
|
[1,2,3]
|
|
[1,2,4]
|
|
[1,1,1]
|
|
[0,0,0]
|
|
(4 rows)
|
|
|
|
SELECT * FROM t ORDER BY val <-> (SELECT NULL::vector);
|
|
val
|
|
-----
|
|
(0 rows)
|
|
|
|
SELECT COUNT(*) FROM t;
|
|
count
|
|
-------
|
|
5
|
|
(1 row)
|
|
|
|
DROP TABLE t;
|