es - elasticsearch mapping - field data type - 29

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 ：percolator有什么特点？
答 ：

问 ：percolator如何使用？
答 ：

# percolator
PUT /percolator_test
{
  "mappings" : {
    "properties" : {
      "my_percolator" : {"type" : "percolator"},
      "my_text"       : {"type" : "text"}
    }
  }
}

# 索引
POST /percolator_test/_doc/1
{
  "my_percolator" : {
    "match" : {
      "my_text" : "hello"
    }
  }
}

# 索引
POST /percolator_test/_doc/2
{
  "my_percolator" : {
    "match" : {
      "my_text" : "hello good"
    }
  }
}

# 索引
POST /percolator_test/_doc/3
{
  "my_percolator" : {
    "match" : {
      "my_text" : "good"
    }
  }
}

# 索引
POST /percolator_test/_doc/4
{
  "my_percolator" : {
    "match" : {
      "my_text" : "tea"
    }
  }
}


# 搜索
GET /percolator_test/_search
{
  "query" : {
    "percolate": {
      "field"    : "my_percolator",
      "document" : {
        "my_text" : "this is hello good"
      }
    }
  }
}

# 结果
{
  "took" : 2,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 3,
      "relation" : "eq"
    },
    "max_score" : 0.26152915,
    "hits" : [
      {
        "_index" : "percolator_test",
        "_type" : "_doc",
        "_id" : "2",
        "_score" : 0.26152915,
        "_source" : {
          "my_percolator" : {
            "match" : {
              "my_text" : "hello good"
            }
          }
        },
        "fields" : {
          "_percolator_document_slot" : [
            0
          ]
        }
      },
      {
        "_index" : "percolator_test",
        "_type" : "_doc",
        "_id" : "1",
        "_score" : 0.13076457,
        "_source" : {
          "my_percolator" : {
            "match" : {
              "my_text" : "hello"
            }
          }
        },
        "fields" : {
          "_percolator_document_slot" : [
            0
          ]
        }
      },
      {
        "_index" : "percolator_test",
        "_type" : "_doc",
        "_id" : "3",
        "_score" : 0.13076457,
        "_source" : {
          "my_percolator" : {
            "match" : {
              "my_text" : "good"
            }
          }
        },
        "fields" : {
          "_percolator_document_slot" : [
            0
          ]
        }
      }
    ]
  }
}