Elasticsearch查询文档

GET查询索引单个文档

GET /索引/_doc/ID

GET /ffbf/_doc/123

返回结果如下，查到了有数据"found" : true表示

{
  "_index" : "ffbf",
  "_type" : "_doc",
  "_id" : "123",
  "_version" : 2,
  "_seq_no" : 1,
  "_primary_term" : 1,
  "found" : true,
  "_source" : {
    "name" : "Monster",
    "age" : 26,
    "address" : "天安云谷xx栋xx层",
    "url" : "ffbf.top"
  }
}

随便查询不存在的文档ID

GET /ffbf/_doc/888888888888888

返回结果，如果没有则为false

{
  "_index" : "ffbf",
  "_type" : "_doc",
  "_id" : "888888888888888",
  "found" : false
}

HEAD检查索引文档是否存在

HEAD /索引/_doc/ID

HEAD /ffbf/_doc/123

返回结果，存在200，OK

200 - OK

如果查询不存在的文档

HEAD /ffbf/_doc/9999999

返回结果，404，Not Found

{"statusCode":404,"error":"Not Found","message":"404 - Not Found"}

查询单个索引里的多个文档

GET /索引/_mget，ids表示要查询的文档id数组

GET /ffbf/_mget
{
  "ids":["123","456","789"]
}

返回结果，可以看到id为123、456的文档数据返回了，789这个文档是没有的返回"found" : false

{
  "docs" : [
    {
      "_index" : "ffbf",
      "_type" : "_doc",
      "_id" : "123",
      "_version" : 2,
      "_seq_no" : 1,
      "_primary_term" : 1,
      "found" : true,
      "_source" : {
        "name" : "Monster",
        "age" : 26,
        "address" : "天安云谷xx栋xx层",
        "url" : "ffbf.top"
      }
    },
    {
      "_index" : "ffbf",
      "_type" : "_doc",
      "_id" : "456",
      "_version" : 1,
      "_seq_no" : 0,
      "_primary_term" : 1,
      "found" : true,
      "_source" : {
        "name" : "Monster",
        "age" : 26,
        "address" : "天安云谷xx栋xx层",
        "url" : "ffbf.top"
      }
    },
    {
      "_index" : "ffbf",
      "_type" : "_doc",
      "_id" : "789",
      "found" : false
    }
  ]
}

查询单个索引里的多个文档方法2

GET /索引/_search ，使用“query”：{}

GET /ffbf/_search
{
  "query": {
    "ids": {
      "values": ["123","456","789"]
    }
  }
}

返回结果，命中2条，查询不存在的id789文档直接无视

{
  "took" : 1,
  "timed_out" : false,
  "_shards" : {
    "total" : 2,
    "successful" : 2,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 2,
      "relation" : "eq"
    },
    "max_score" : 1.0,
    "hits" : [
      {
        "_index" : "ffbf",
        "_type" : "_doc",
        "_id" : "123",
        "_score" : 1.0,
        "_source" : {
          "name" : "Monster",
          "age" : 26,
          "address" : "天安云谷xx栋xx层",
          "url" : "ffbf.top"
        }
      },
      {
        "_index" : "ffbf",
        "_type" : "_doc",
        "_id" : "456",
        "_score" : 1.0,
        "_source" : {
          "name" : "Monster",
          "age" : 26,
          "address" : "天安云谷xx栋xx层",
          "url" : "ffbf.top"
        }
      }
    ]
  }
}

查询多个索引多个文档

GET _mgt ，使用"docs":[ ]，同时查询ffbf、qqbq两个索引的123、456、789文档

GET _mget
{
  "docs":[
      {
        "_index":"ffbf",
        "_id":123
      },
      {
        "_index":"ffbf",
        "_id":456
      },
      {
        "_index":"ffbf",
        "_id":789
      },
      {
        "_index":"qqbq",
        "_id":123
      },
      {
        "_index":"qqbq",
        "_id":456
      },
      {
        "_index":"qqbq",
        "_id":789
      }
    ]
}

返回结果，ffbf索引的123、456文档返回数据，789文档不存在，qqbq123、456文档不存在，789正常返回数据

{
  "docs" : [
    {
      "_index" : "ffbf",
      "_type" : "_doc",
      "_id" : "123",
      "_version" : 2,
      "_seq_no" : 1,
      "_primary_term" : 1,
      "found" : true,
      "_source" : {
        "name" : "Monster",
        "age" : 26,
        "address" : "天安云谷xx栋xx层",
        "url" : "ffbf.top"
      }
    },
    {
      "_index" : "ffbf",
      "_type" : "_doc",
      "_id" : "456",
      "_version" : 1,
      "_seq_no" : 0,
      "_primary_term" : 1,
      "found" : true,
      "_source" : {
        "name" : "Monster",
        "age" : 26,
        "address" : "天安云谷xx栋xx层",
        "url" : "ffbf.top"
      }
    },
    {
      "_index" : "ffbf",
      "_type" : "_doc",
      "_id" : "789",
      "found" : false
    },
    {
      "_index" : "qqbq",
      "_type" : "_doc",
      "_id" : "123",
      "found" : false
    },
    {
      "_index" : "qqbq",
      "_type" : "_doc",
      "_id" : "456",
      "found" : false
    },
    {
      "_index" : "qqbq",
      "_type" : "_doc",
      "_id" : "789",
      "_version" : 1,
      "_seq_no" : 0,
      "_primary_term" : 1,
      "found" : true,
      "_source" : {
        "name" : "Helen",
        "age" : 20,
        "address" : "天安云谷xx栋xx层",
        "url" : "qqbq.top"
      }
    }
  ]
}

查询多个索引多个文档方法2

GET ffbf,qqbq/_search
{
  "query": {
    "ids": {
      "values": ["123","456","789"]
    }
  }
}

返回结果，命中3条，ffbf的123、456，qqbq的789

{
  "took" : 2,
  "timed_out" : false,
  "_shards" : {
    "total" : 3,
    "successful" : 3,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 3,
      "relation" : "eq"
    },
    "max_score" : 1.0,
    "hits" : [
      {
        "_index" : "ffbf",
        "_type" : "_doc",
        "_id" : "123",
        "_score" : 1.0,
        "_source" : {
          "name" : "Monster",
          "age" : 26,
          "address" : "天安云谷xx栋xx层",
          "url" : "ffbf.top"
        }
      },
      {
        "_index" : "qqbq",
        "_type" : "_doc",
        "_id" : "789",
        "_score" : 1.0,
        "_source" : {
          "name" : "Helen",
          "age" : 20,
          "address" : "天安云谷xx栋xx层",
          "url" : "qqbq.top"
        }
      },
      {
        "_index" : "ffbf",
        "_type" : "_doc",
        "_id" : "456",
        "_score" : 1.0,
        "_source" : {
          "name" : "Monster",
          "age" : 26,
          "address" : "天安云谷xx栋xx层",
          "url" : "ffbf.top"
        }
      }
    ]
  }
}