ES|QL - dense_vector approximate nearest neighbour search support #126710
Description
Description
As dense_vector support is being addressed in #125783, ES|QL will be able to perform approximate nearest neighbour vector search.
The following tasks will be needed:
- kNN search function using vectors: ES|QL - kNN function initial support #127322
- ESQL - Add K mandatory param for KNN function #129763
- kNN uses LIMIT for setting k
- Prefiltering in kNN search ESQL - KNN function uses prefilters when pushed down to Lucene #131004
- Prefiltering in kNN when prefilters can't be pushed down ESQL - KNN functions with non-pushed down filters #131708
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kNN text search, using Inferencewill be done via text embedding function in ES|QL: Add TEXT_EMBEDDING function #131022 - ES|QL: Add support for semantic_text in knn function #132066