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105 lines
1.8 KiB
Plaintext
105 lines
1.8 KiB
Plaintext
SELECT '[1,2,3]'::vector + '[4,5,6]';
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?column?
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----------
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[5,7,9]
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(1 row)
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SELECT '[1,2,3]'::vector - '[4,5,6]';
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?column?
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------------
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[-3,-3,-3]
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(1 row)
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SELECT vector_dims('[1,2,3]');
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vector_dims
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-------------
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3
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(1 row)
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SELECT round(vector_norm('[1,1]')::numeric, 5);
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round
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---------
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1.41421
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(1 row)
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SELECT vector_norm('[3,4]');
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vector_norm
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-------------
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5
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(1 row)
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SELECT vector_norm('[0,1]');
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vector_norm
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-------------
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1
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(1 row)
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SELECT l2_distance('[0,0]', '[3,4]');
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l2_distance
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-------------
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5
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(1 row)
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SELECT l2_distance('[0,0]', '[0,1]');
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l2_distance
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-------------
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1
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(1 row)
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SELECT l2_distance('[1,2]', '[3]');
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ERROR: different vector dimensions 2 and 1
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SELECT inner_product('[1,2]', '[3,4]');
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inner_product
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---------------
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11
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(1 row)
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SELECT inner_product('[1,2]', '[3]');
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ERROR: different vector dimensions 2 and 1
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SELECT cosine_distance('[1,2]', '[2,4]');
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cosine_distance
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-----------------
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0
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(1 row)
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SELECT cosine_distance('[1,2]', '[0,0]');
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cosine_distance
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-----------------
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NaN
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(1 row)
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SELECT cosine_distance('[1,1]', '[1,1]');
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cosine_distance
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-----------------
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0
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(1 row)
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SELECT cosine_distance('[1,1]', '[-1,-1]');
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cosine_distance
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-----------------
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2
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(1 row)
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SELECT cosine_distance('[1,2]', '[3]');
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ERROR: different vector dimensions 2 and 1
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SELECT avg(v) FROM unnest(ARRAY['[1,2,3]'::vector, '[3,5,7]']) v;
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avg
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-----------
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[2,3.5,5]
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(1 row)
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SELECT avg(v) FROM unnest(ARRAY['[1,2,3]'::vector, '[3,5,7]', NULL]) v;
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avg
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-----------
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[2,3.5,5]
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(1 row)
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SELECT avg(v) FROM unnest(ARRAY[]::vector[]) v;
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avg
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-----
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(1 row)
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SELECT avg(v) FROM unnest(ARRAY['[1,2]'::vector, '[3]']) v;
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ERROR: expected 2 dimensions, not 1
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