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### Description
Currently the only way for users to do a brute-force or exact search with KNN is with a script query. This requires some knowledge of the function names and scoring methodologies.
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**Is your feature request related to a problem?**
Currently if a user wants to only perform exact search on a k-NN index they need to mark `knn:false` in the index setting. What does this do is it fo…
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Can we memic this feature in OpenSearch https://www.elastic.co/search-labs/blog/semantic-search-simplified-semantic-text
I know that a lot has been done recently in OpenSearch projects to make thi…
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**Is your feature request related to a problem?**
Yes, I want to create a document with more than one nested vector in a single document (nested / nested vector), query the document with multiple k-N…
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### Description
Learned Sparse Vectors claim to combine the benefits of sparse (i.e. lexical) and dense (i.e. vector) representations
From https://en.wikipedia.org/wiki/Learned_sparse_retrieval:…
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### Description
By reading some of the latest bugfixes in `8.13.0` and the documentation it seems it is still not possible to pre-filter a `knn` search on nested mappings, such as:
```
{
"m…
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It would be nice to make kNN searches faster when Sakoe-Chiba constrained DTW is concerned using LB_Keogh based pre-filtering.
This should be implemented in the `kneighbors` method of class `KNeigh…
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### Description
In some vector search cases, users may already know some documents that are likely related to a query. Let's support seeding HNSW's scoring stage with these documents, rather than usi…
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**Is your feature request related to a problem?**
Currently if a user has to do exact search, they need to use script query to the exact search. Ref: https://opensearch.org/docs/latest/search-plugins…
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**What is the bug?**
we had an index with 5 shards and we wanted to rindex it to a new index with one shard. approximate search does not show results with exact same vector in the new index.
Happe…