elasticsearch/docs/reference/query-languages/esql/_snippets/functions/examples/knn.md

% This is generated by ESQL's AbstractFunctionTestCase. Do not edit it. See ../README.md for how to regenerate it.

Examples

from colors metadata _score
| where knn(rgb_vector, [0, 120, 0])
| sort _score desc, color asc

color:text	rgb_vector:dense_vector
green	[0.0, 128.0, 0.0]
black	[0.0, 0.0, 0.0]
olive	[128.0, 128.0, 0.0]
teal	[0.0, 128.0, 128.0]
lime	[0.0, 255.0, 0.0]
sienna	[160.0, 82.0, 45.0]
maroon	[128.0, 0.0, 0.0]
navy	[0.0, 0.0, 128.0]
gray	[128.0, 128.0, 128.0]
chartreuse	[127.0, 255.0, 0.0]

from colors metadata _score
| where knn(rgb_vector, [0,255,255], {"k": 4})
| sort _score desc, color asc