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Added hamming_distance function

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This commit is contained in:
Andrew Kane
2024-01-23 15:01:11 -08:00
parent c8be3a369b
commit 76c6dbb0a0
6 changed files with 82 additions and 0 deletions
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26
test/expected/functions.out
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@@ -158,6 +158,32 @@ SELECT l1_distance('[3e38]', '[-3e38]');
Infinity
(1 row)
SELECT hamming_distance('\xFF', '\xFF');
hamming_distance
------------------
0
(1 row)
SELECT hamming_distance('\xFF', '\xFE');
hamming_distance
------------------
1
(1 row)
SELECT hamming_distance('\xFF', '\xFC');
hamming_distance
------------------
2
(1 row)
SELECT hamming_distance('\xFF', '\x00');
hamming_distance
------------------
8
(1 row)
SELECT hamming_distance('\xFF', '\x0000');
ERROR: different byte lengths 1 and 2
SELECT avg(v) FROM unnest(ARRAY['[1,2,3]'::vector, '[3,5,7]']) v;
avg
-----------