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Elastic Docs ›Elasticsearch Guide [8.16] ›Query DSL

Vector queries

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IMPORTANT: This documentation is no longer updated. Refer to Elastic's version policy and the latest documentation.

Vector queries

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Vector queries are specialized queries that work on vector fields to efficiently perform semantic search.

knn query
A query that finds the k nearest vectors to a query vector for dense_vector fields, as measured by a similarity metric.
sparse_vector query
A query used to search sparse_vector field types.
semantic query
A query that allows you to perform semantic search on semantic_text fields.

Deprecated vector queries

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The following queries have been deprecated and will be removed in the near future. Use the sparse_vector query query instead.

text_expansion query
A query that allows you to perform sparse vector search on sparse_vector or rank_features fields.
weighted_tokens query
Allows to perform text expansion queries optimizing for performance.
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