[FEATURE] Sorting support for Hybrid Search

[ankitas3]

Is your feature request related to a problem?
Hybrid Search always returns results in the descending order of score. Applying sorting as below has no affect on the results

{
  "query": {
    "hybrid":{
      "queries": [
        <text query>,
        <kNN query>
      ]
    }
  }
  "sort": [
    {
      "title.keyword": {
        "order": "desc"
      }
    }
  ]
}

What solution would you like?
Sorting should work as it does with other boolean queries. Results matching the Hybrid query should later be sorted on the basis of sorting applied.

[navneet1v]

Moving this to neural search repo, as the hybrid query clause is in Neural Search repo.

[vibrantvarun]

Hey @ankitas3 Can you share the use case of this problem? We are doing some brainstorming and we need to understand how sorting fits in your usecase.

[tsilvafsl]

I am experiencing a problem that might be related.

When performing a hybrid search query with a search_pipeline, the sort tag does not work as expected.

In other words, the sort is being bypassed by search_pipeline and if you remove the search pipeline, the sort works fine in a hybrid query.

In this issue I describe the problem and a reproducible example.
https://forum.opensearch.org/t/unable-to-sort-query-results-with-search-pipeline-hybrid-query/19726

Is it possible to make it work with current opensearch?

[navneet1v]

@vibrantvarun can we close this issue as the feature is merged?