GET production-index-info/index_info/_search
{
  "query": {
    "bool": {
      "minimum_should_match": 0,
      "must": [
        {
          "term": {
            "is_resolved.keyword": "解决"
          }
        }
      ],
      "should": []
    }
  }
}

使用这种方式查询，就可以得到数据。数据如下格式

{
  "took": 51,
  "timed_out": false,
  "_shards": {
    "total": 5,
    "successful": 5,
    "skipped": 0,
    "failed": 0
  },
  "hits": {
    "total": 2914867,
    "max_score": 0.26003557,
    "hits": [
      {
        "_index": "production-index-info",
        "_type": "index_info",
        "_id": "5a5d4fcdc42fbc2bcefae14a",
        "_score": 0.26003557,
        "_source": {
          "created_time": "2020-01-21T22:44:50+08:00",
          "tickets": [],
          "is_resolved": "解决",
          "note": "",
        }
      },
      {
        "_index": "production-index-info",
        "_type": "index_info",
        "_id": "5a64a762cd1cb23dbb294bfa",
        "_score": 0.26003557,
        "_source": {
          "created_time": "2018-01-21T22:44:50+08:00",
          "tickets": [],
          "is_resolved": "解决",
          "note": "",
        }
      },
      {
        "_index": "production-index-info",
        "_type": "index_info",
        "_id": "5a5d88136817b27825831ac2",
        "_score": 0.26003557,
        "_source": {
          "created_time": "2018-01-16T13:05:23+08:00",
          "tickets": [],
          "is_resolved": "解决",
          "note": "11111",
        }
      },
      {
        "_index": "production-index-info",
        "_type": "index_info",
        "_id": "5a5dbc30c42fbc2ef1307ba9",
        "_score": 0.26003557,
        "_source": {
          "created_time": "2018-01-16T16:47:44+08:00",
          "tickets": [],
          "is_resolved": "未解决",
          "note": "222",
        }
      },
      ......
    ]
  }
}

但是如果使用这种方式，删除了.keywprd，

GET production-index-info/index_info/_search
{
  "query": {
    "bool": {
      "minimum_should_match": 0,
      "must": [
        {
          "term": {
            "is_resolved": "解决"
          }
        }
      ],
      "should": []
    }
  }
}

那么结果就是这样的

{
  "took": 0,
  "timed_out": false,
  "_shards": {
    "total": 5,
    "successful": 5,
    "skipped": 0,
    "failed": 0
  },
  "hits": {
    "total": 0,
    "max_score": null,
    "hits": []
  }
}

我知道这个.keyword和分词有关，但是对于这个例子，没有搞懂为什么，加了.keyword才可以查询出来结果，不加就不行了。另外，is_resolved的值，只有解决和未解决两个。