Scalar product sort for vector types

Elastic Stack Elasticsearch
1

Hi all :slight_smile:

Presumably ES has some optimized scalar product scoring/sorting for textual relevance similarity scoring using documents' term vectors.

Is this same mechanism available for dense_vector and sparse_vector field types?

I'd hate to resort to using a script_score when ES probably has an optimized implementation!

Thanks!

2

the dotProduct and dotProductSparse functions within the script_score query are indeed what you are looking for I suppose. That's the function made available at the moment. See https://www.elastic.co/guide/en/elasticsearch/reference/7.x/query-dsl-script-score-query.html#_dense_vector_functions

3

Thanks @spinscale.

I suppose then there is no special support for this outside of a script_score?

In the past I have been disappointed by script_score performance, but I have not used ES7 yet. Does it get any better with ES7?

Thanks!

4

Even though there have been improvements, it is hard to tell if they are applied or sufficient for your use-case.

I'd personally just give it a shot and see how it works, if possible.

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