Whether rrf can be applied to nested knn search using inner hits

Does rrf apply to queries that combine keyword search, sparse vector search, and knn vector search using inner hits?


At the moment on the official docs it says the current (technical preview) supports the following types of searches:

RRF does support:

You can use RRF as part of a search to combine and rank documents using result sets from a combination of query, sub searches, and/or knn searches. A minimum of 2 results sets is required for ranking from the specified sources.

Check the docs for examples.

The capabilities may change and evolve until it reaches GA - you can test it out; any unsupported features included in the query will result in an exception.

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