Add dynamic mapping for knn_vector fields - #12938
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Document the two dynamic knn_vector mapping paths introduced in 3.9: a dynamic template using match_mapping_type: knn_vector, and zero-config auto-inference of a knn_vector from a flat numeric array. Includes the inference gate (multiple of 8, within [128, 16000]), dimension locking, and that explicit mappings take precedence. Signed-off-by: ved naykude <vnaykude@amazon.com>
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August 18, 2026 20:06
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@kotwanikunal @Vikasht34 Could you review this PR please? |
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Description
Documents the two dynamic
knn_vectormapping paths introduced in 3.9:knn_vectoras amatch_mapping_type, withdimensioneither specified or inferred from the first document.knn_vectorwhen its length is a multiple of 8 and within the[128, 16000]range.The section also covers dimension locking after the first document, the shape-based nature of auto-inference (including the misclaim caveat for non-vector numeric arrays), and that an explicit mapping always takes precedence.
Added as a new "Dynamic mapping" section in
_mappings/supported-field-types/knn-vector.md.Related
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