mirror of
https://github.com/pgvector/pgvector.git
synced 2026-06-30 09:41:15 +08:00
30 lines
767 B
Plaintext
30 lines
767 B
Plaintext
SET enable_seqscan = off;
|
|
CREATE TABLE t (val bit(3));
|
|
INSERT INTO t (val) VALUES (B'000'), (B'100'), (B'111'), (NULL);
|
|
CREATE INDEX ON t USING hnsw (val bit_hamming_ops);
|
|
INSERT INTO t (val) VALUES (B'110');
|
|
SELECT * FROM t ORDER BY val <~> B'111';
|
|
val
|
|
-----
|
|
111
|
|
110
|
|
100
|
|
000
|
|
(4 rows)
|
|
|
|
SELECT COUNT(*) FROM (SELECT * FROM t ORDER BY val <~> (SELECT NULL::bit)) t2;
|
|
count
|
|
-------
|
|
4
|
|
(1 row)
|
|
|
|
DROP TABLE t;
|
|
-- TODO move
|
|
CREATE TABLE t (val varbit(3));
|
|
CREATE INDEX ON t USING hnsw (val bit_hamming_ops);
|
|
ERROR: type not supported for hnsw index
|
|
CREATE INDEX ON t USING hnsw ((val::bit(3)) bit_hamming_ops);
|
|
CREATE INDEX ON t USING hnsw ((val::bit(64001)) bit_hamming_ops);
|
|
ERROR: column cannot have more than 64000 dimensions for hnsw index
|
|
DROP TABLE t;
|