mirror of
https://github.com/pgvector/pgvector.git
synced 2026-06-06 05:51:21 +08:00
63 lines
1.3 KiB
Plaintext
63 lines
1.3 KiB
Plaintext
SELECT l2_distance('{}/2'::sparsevec, '{0:3,1:4}/2');
|
|
l2_distance
|
|
-------------
|
|
5
|
|
(1 row)
|
|
|
|
SELECT l2_distance('{}/2'::sparsevec, '{1:1}/2');
|
|
l2_distance
|
|
-------------
|
|
1
|
|
(1 row)
|
|
|
|
SELECT '{}/2'::sparsevec <-> '{0:3,1:4}/2';
|
|
?column?
|
|
----------
|
|
5
|
|
(1 row)
|
|
|
|
SELECT inner_product('{0:1,1:2}/2'::sparsevec, '{0:2,1:4}/2');
|
|
inner_product
|
|
---------------
|
|
10
|
|
(1 row)
|
|
|
|
SELECT sparsevec_negative_inner_product('{0:1,1:2}/2', '{0:2,1:4}/2');
|
|
sparsevec_negative_inner_product
|
|
----------------------------------
|
|
-10
|
|
(1 row)
|
|
|
|
SELECT cosine_distance('{0:1,1:2}/2'::sparsevec, '{0:2,1:4}/2');
|
|
cosine_distance
|
|
-----------------
|
|
0
|
|
(1 row)
|
|
|
|
SELECT cosine_distance('{0:1,1:2}/2'::sparsevec, '{}/2');
|
|
cosine_distance
|
|
-----------------
|
|
NaN
|
|
(1 row)
|
|
|
|
SELECT cosine_distance('{0:1,1:1}/2'::sparsevec, '{0:-1,1:-1}/2');
|
|
cosine_distance
|
|
-----------------
|
|
2
|
|
(1 row)
|
|
|
|
SELECT cosine_distance('{0:1}/2'::sparsevec, '{1:2}/2');
|
|
cosine_distance
|
|
-----------------
|
|
1
|
|
(1 row)
|
|
|
|
SELECT cosine_distance('{}/1'::sparsevec, '{}/1');
|
|
cosine_distance
|
|
-----------------
|
|
NaN
|
|
(1 row)
|
|
|
|
SELECT cosine_distance('{0:1}/2'::sparsevec, '{0:1}/3');
|
|
ERROR: different sparsevec dimensions 2 and 3
|