4.6 ElasticSearch搜索之Count And Source

1.count
查询name字段中包含Mike的文档数。

POST /people/_count

{
  "query": {
    "bool": {
      "filter": [{
        "match": {
          "name": "Mike"
        }
      }]
    }
  }
}

{
  "count" : 3,
  "_shards" : {
    "total" : 5,
    "successful" : 5,
    "skipped" : 0,
    "failed" : 0
  }
}

2.source
通过_source，只显示文档的name和country字段。

POST /people/_search

{
  "_source": ["name", "country"],
  "query": {
    "match": {
      "name": "Mike"
    }
  }
}

{
  "took" : 1,
  "timed_out" : false,
  "_shards" : {
    "total" : 5,
    "successful" : 5,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 3,
      "relation" : "eq"
    },
    "max_score" : 0.105360515,
    "hits" : [
      {
        "_index" : "people",
        "_type" : "_doc",
        "_id" : "1",
        "_score" : 0.105360515,
        "_source" : {
          "country" : "China",
          "name" : "Mike Steven"
        }
      },
      {
        "_index" : "people",
        "_type" : "_doc",
        "_id" : "mom6gXsBEsHOdz1YRcov",
        "_score" : 0.105360515,
        "_source" : {
          "country" : "China",
          "name" : "Mike Sherry"
        }
      },
      {
        "_index" : "people",
        "_type" : "_doc",
        "_id" : "nonCgXsBEsHOdz1YDcoP",
        "_score" : 0.105360515,
        "_source" : {
          "country" : "Englend",
          "name" : "Mike Owen"
        }
      }
    ]
  }
}