Please add a property to set expected similarity to KnnQueryDescriptor.

[mikkel-busch]

Is your feature request related to a problem? Please describe.

The class KnnQueryDescriptor

Does not seem to have a similarity property to set expected similarity.

The documentation states that such a parameter should exist for KNN search.

Describe the solution you'd like
I would like the property to be added.

Describe alternatives you've considered
Currently the filtering can be done client side, but this add some unnecessary overhead.

[flobernd]

Hi @mikkel-busch!

This is a specification issue which just got fixed: elastic/elasticsearch-specification#2261.

The fix will be included in the next release.

[mikkel-busch]

Sounds good. Thank you for the fast reply.