match_all

匹配所有文档，默认分页查询，只显示后十条数据，如下所示在索引中的数据有11条数据，在进行match_all查询时只返回了十条数据.

    "total": {
      "value": 11,
      "relation": "eq"
    }

GET /es_db/_search
{
  "query": {
    "match_all": {
    }
  }
}

{
  "took": 4,
  "timed_out": false,
  "_shards": {
    "total": 1,
    "successful": 1,
    "skipped": 0,
    "failed": 0
  },
  "hits": {
    "total": {
      "value": 11,
      "relation": "eq"
    },
    "max_score": 1,
    "hits": [
      {
        "_index": "es_db",
        "_id": "10",
        "_score": 1,
        "_source": {
          "name": "开人员",
          "sex": 1,
          "age": 32,
          "address": "武汉东湖高新区未来智汇城",
          "remark": "golang developer"
        }
      },
      {
        "_index": "es_db",
        "_id": "8",
        "_score": 1,
        "_source": {
          "name": "张星",
          "sex": 1,
          "age": 32,
          "address": "武汉东湖高新区未来智汇城",
          "remark": "golang developer"
        }
      },
      {
        "_index": "es_db",
        "_id": "6",
        "_score": 1,
        "_source": {
          "name": "赵虎",
          "sex": 1,
          "age": 32,
          "address": "长沙麓谷兴工国际产业园",
          "remark": "java architect"
        }
      },
      {
        "_index": "es_db",
        "_id": "5",
        "_score": 1,
        "_source": {
          "name": "张龙",
          "sex": 0,
          "age": 19,
          "address": "长沙麓谷企业广场",
          "remark": "java architect assistant"
        }
      },
      {
        "_index": "es_db",
        "_id": "7",
        "_score": 1,
        "_source": {
          "name": "李虎",
          "sex": 1,
          "age": 32,
          "address": "广州番禺节能科技园",
          "remark": "java architect"
        }
      },
      {
        "_index": "es_db",
        "_id": "3",
        "_score": 1,
        "_source": {
          "name": "王五",
          "sex": 0,
          "age": 26,
          "address": "广州白云山公园",
          "remark": "php developer"
        }
      },
      {
        "_index": "es_db",
        "_id": "1",
        "_score": 1,
        "_source": {
          "name": "张三",
          "sex": 1,
          "age": 25,
          "address": "广州天河公园",
          "remark": "java developer"
        }
      },
      {
        "_index": "es_db",
        "_id": "2",
        "_score": 1,
        "_source": {
          "name": "李四",
          "sex": 1,
          "age": 28,
          "address": "广州荔湾大厦",
          "remark": "java assistant"
        }
      },
      {
        "_index": "es_db",
        "_id": "4",
        "_score": 1,
        "_source": {
          "name": "赵六",
          "sex": 0,
          "age": 22,
          "address": "长沙橘子洲",
          "remark": "python assistant"
        }
      },
      {
        "_index": "es_db",
        "_id": "11",
        "_score": 1,
        "_source": {
          "name": "企业人员",
          "sex": 1,
          "age": 32,
          "address": "武汉东湖高新区未来智汇城",
          "remark": "golang developer"
        }
      }
    ]
  }
}

如果想要指定分页查询可以使用from和size参数，如下所示，from表示从第几条记录开始分页，size表示每页展示几条数据

GET /es_db/_search
{
  "query": {
    "match_all": {
      
    }
  },
    "from": 0,
    "size": 11
}


{
  "took": 6,
  "timed_out": false,
  "_shards": {
    "total": 1,
    "successful": 1,
    "skipped": 0,
    "failed": 0
  },
  "hits": {
    "total": {
      "value": 11,
      "relation": "eq"
    },
    "max_score": 1,
    "hits": [
      {
        "_index": "es_db",
        "_id": "10",
        "_score": 1,
        "_source": {
          "name": "开人员",
          "sex": 1,
          "age": 32,
          "address": "武汉东湖高新区未来智汇城",
          "remark": "golang developer"
        }
      },
      {
        "_index": "es_db",
        "_id": "8",
        "_score": 1,
        "_source": {
          "name": "张星",
          "sex": 1,
          "age": 32,
          "address": "武汉东湖高新区未来智汇城",
          "remark": "golang developer"
        }
      },
      {
        "_index": "es_db",
        "_id": "6",
        "_score": 1,
        "_source": {
          "name": "赵虎",
          "sex": 1,
          "age": 32,
          "address": "长沙麓谷兴工国际产业园",
          "remark": "java architect"
        }
      },
      {
        "_index": "es_db",
        "_id": "5",
        "_score": 1,
        "_source": {
          "name": "张龙",
          "sex": 0,
          "age": 19,
          "address": "长沙麓谷企业广场",
          "remark": "java architect assistant"
        }
      },
      {
        "_index": "es_db",
        "_id": "7",
        "_score": 1,
        "_source": {
          "name": "李虎",
          "sex": 1,
          "age": 32,
          "address": "广州番禺节能科技园",
          "remark": "java architect"
        }
      },
      {
        "_index": "es_db",
        "_id": "3",
        "_score": 1,
        "_source": {
          "name": "王五",
          "sex": 0,
          "age": 26,
          "address": "广州白云山公园",
          "remark": "php developer"
        }
      },
      {
        "_index": "es_db",
        "_id": "1",
        "_score": 1,
        "_source": {
          "name": "张三",
          "sex": 1,
          "age": 25,
          "address": "广州天河公园",
          "remark": "java developer"
        }
      },
      {
        "_index": "es_db",
        "_id": "2",
        "_score": 1,
        "_source": {
          "name": "李四",
          "sex": 1,
          "age": 28,
          "address": "广州荔湾大厦",
          "remark": "java assistant"
        }
      },
      {
        "_index": "es_db",
        "_id": "4",
        "_score": 1,
        "_source": {
          "name": "赵六",
          "sex": 0,
          "age": 22,
          "address": "长沙橘子洲",
          "remark": "python assistant"
        }
      },
      {
        "_index": "es_db",
        "_id": "11",
        "_score": 1,
        "_source": {
          "name": "企业人员",
          "sex": 1,
          "age": 32,
          "address": "武汉东湖高新区未来智汇城",
          "remark": "golang developer"
        }
      },
      {
        "_index": "es_db",
        "_id": "9",
        "_score": 1,
        "_source": {
          "name": "泥马勒戈壁",
          "sex": 1,
          "age": 32,
          "address": "武汉东湖高新区未来智汇城",
          "remark": "golang developer"
        }
      }
    ]
  }
}

_source

返回字段限制，如下所示，如果只想显示name和index字段可以以以下方式进行查询

GET /es_db/_search
{
  "_source": ["name", "age"], 
  "query": {
    "match_all": {
      
    }
  }
}

查询结果
{
  "took": 5,
  "timed_out": false,
  "_shards": {
    "total": 1,
    "successful": 1,
    "skipped": 0,
    "failed": 0
  },
  "hits": {
    "total": {
      "value": 11,
      "relation": "eq"
    },
    "max_score": 1,
    "hits": [
      {
        "_index": "es_db",
        "_id": "10",
        "_score": 1,
        "_source": {
          "name": "开人员",
          "age": 32
        }
      },
      {
        "_index": "es_db",
        "_id": "8",
        "_score": 1,
        "_source": {
          "name": "张星",
          "age": 32
        }
      },
      {
        "_index": "es_db",
        "_id": "6",
        "_score": 1,
        "_source": {
          "name": "赵虎",
          "age": 32
        }
      },
      {
        "_index": "es_db",
        "_id": "5",
        "_score": 1,
        "_source": {
          "name": "张龙",
          "age": 19
        }
      },
      {
        "_index": "es_db",
        "_id": "7",
        "_score": 1,
        "_source": {
          "name": "李虎",
          "age": 32
        }
      },
      {
        "_index": "es_db",
        "_id": "3",
        "_score": 1,
        "_source": {
          "name": "王五",
          "age": 26
        }
      },
      {
        "_index": "es_db",
        "_id": "1",
        "_score": 1,
        "_source": {
          "name": "张三",
          "age": 25
        }
      },
      {
        "_index": "es_db",
        "_id": "2",
        "_score": 1,
        "_source": {
          "name": "李四",
          "age": 28
        }
      },
      {
        "_index": "es_db",
        "_id": "4",
        "_score": 1,
        "_source": {
          "name": "赵六",
          "age": 22
        }
      },
      {
        "_index": "es_db",
        "_id": "11",
        "_score": 1,
        "_source": {
          "name": "企业人员",
          "age": 32
        }
      }
    ]
  }
}