es - elasticsearch mapping - field data type - 20

世界上并没有完美的程序，但是我们并不因此而沮丧，因为写程序就是一个不断追求完美的过程。

问 ：dense_vector有什么特点？
答 ：

问 ：dense_vector如何使用？
答 ：

# dense_vector
PUT /dense_vector_test
{
  "mappings" : {
    "properties" : {
      "my_dense_vector" : {
        "type" : "dense_vector",
        "dims" : 3
      },
      "status" : {"type" : "integer"}
    }
  }
}

# 索引
POST /dense_vector_test/_doc
{
  "my_dense_vector" : [0.5, 3, 8],
  "status"          : 1
}

# 索引
POST /dense_vector_test/_doc
{
  "my_dense_vector" : [0.5, 4, 9],
  "status"          : 1
}

# 索引
POST /dense_vector_test/_doc
{
  "my_dense_vector" : [1.5, 5, 8],
  "status"          : 1
}

# 搜索
GET /dense_vector_test/_search
{
  "query" : {
    "script_score" : {
      "query"  : {
        "bool" : {
          "filter" : {
            "term" : {
              "status" : 1
            }
          } 
        }
      },
      "script" : {
        "source" : "cosineSimilarity(params.query_vector, 'my_dense_vector') + 1.0",
        "params" : {
          "query_vector" : [0.7, 3, 18]
        }
      }
    }
  }
}

# 结果
{
  "took" : 6,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 3,
      "relation" : "eq"
    },
    "max_score" : 1.9811572,
    "hits" : [
      {
        "_index" : "dense_vector_test",
        "_type" : "_doc",
        "_id" : "RmcIZ3gBVbS9eSDZzO7Y",
        "_score" : 1.9811572,
        "_source" : {
          "my_dense_vector" : [
            0.5,
            3,
            8
          ],
          "status" : 1
        }
      },
      {
        "_index" : "dense_vector_test",
        "_type" : "_doc",
        "_id" : "R2cIZ3gBVbS9eSDZ1u79",
        "_score" : 1.9681346,
        "_source" : {
          "my_dense_vector" : [
            0.5,
            4,
            9
          ],
          "status" : 1
        }
      },
      {
        "_index" : "dense_vector_test",
        "_type" : "_doc",
        "_id" : "SGcIZ3gBVbS9eSDZ3-5z",
        "_score" : 1.9174826,
        "_source" : {
          "my_dense_vector" : [
            1.5,
            5,
            8
          ],
          "status" : 1
        }
      }
    ]
  }
}