Pinned retriever

Serverless Stack 9.1.0

A pinned retriever returns top documents by always placing specific documents at the top of the results, with the remaining hits provided by a secondary retriever.

This retriever offers similar functionality to the pinned query, but works seamlessly with other retrievers. This is useful for promoting certain documents for particular queries, regardless of their relevance score.

ids

(Optional, array of strings)

A list of document IDs to pin at the top of the results, in the order provided.

docs

(Optional, array of objects)

A list of objects specifying documents to pin. Each object must contain at least an _id field, and may also specify _index if pinning documents across multiple indices.

retriever

(Optional, retriever object)

A retriever (for example a standard retriever or a specialized retriever such as rrf retriever) used to retrieve the remaining documents after the pinned ones.

Either ids or docs must be specified.

				GET /restaurants/_search
					{
  "retriever": {
    "pinned": {
      "docs": [
        { "_id": "doc1", "_index": "my-index" },
        { "_id": "doc2" }
      ],
      "retriever": {
        "standard": {
          "query": {
            "match": {
              "title": "elasticsearch"
            }
          }
        }
      }
    }
  }
}