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Integrate Elasticsearch's knn query introduced in 8.12

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Create a 8.12 Dialect that will add knn as a query rather than a separate knn clause at the top level of a request.

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Marko Bekhta January 30, 2024 at 8:38 AM

Note: We've decided to only keep the 8.12 integration and no "knn-clauses outside of the query section of the request" (https://github.com/hibernate/hibernate-search/pull/3934#discussion_r1469742358)

Yoann Rodière January 23, 2024 at 3:14 PM

The top-level knn doesn’t bring much compared to the new query AFAICT.

Honestly you might even want to replace the current implementation completely, and limit KNN support to ES 8.12+.

It’s a shame, because it means wasted time, but on the other hand it will prevent wasting more time maintaining this and handling bug reports.

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Created January 23, 2024 at 3:04 PM
Updated February 12, 2024 at 1:33 PM
Resolved January 30, 2024 at 8:38 AM
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