Can I use the Exact Knn function when using Hybrid Search (using rrf)?

Elastic Search
1

Hi
I am currently using Exact knn for Vector Search.
Can I use the Exact Knn function when using Hybrid Search (using rrf)?
When I enter script_score into the query in Hybrid Search, it does not run.
I wonder if Exact Knn is possible in Hybrid Search.
Thanks

2

Hey,

Which version of Elasticsearch are you using?

One possibility is using sub_searches: one script score query and another BM25 based query. Semantic search | Elasticsearch Guide [8.13] | Elastic

This will be replaced with retrievers in 8.14, released in the next couple of weeks.