Boost Factor in KNN

[Sourabh Tirodkar]

Is there a possibility of including a boost factor for KNN search ?

[Vamshi Vijay Nakkirtha]

Hi @SourabhTirodkar,

boost to kNN search can be achieved through function_score. In the below example i am boosting the score by 2.

curl -X POST "localhost:9200/myindex/_search" -H 'Content-Type: application/json' -d'
{
  "size" : 2,
  "query": {
    "bool": {
      "must": [
        {
          "function_score": {
            "query": {
              "knn": {
                  "my_vector": {
                  "vector": [7, 8],
                  "k": 2
                  }       
              }
          },
            "weight": 2
          }
        },
      ]
    }
  }
}
'