Question

我是ES新手并创建了一个名为vehicle的索引，其数据如下：

_source": {
           "catalogName": "EPE",
           "makeId": 1,
           "modelName": "GRAND PRIX SPECIAL",
           "catalogId": 1,
           "modelId": 22,
           "regionId": 6,
           "regionName": "All Regions",
           "vehicleId": 302,
           "engineName": "2-399  .4L",
           "makeName": "AMC-EAGLE",
           "engineId": 26,
           "yearId": 1991
        }

我想传递yearId并获得makeId和makeName的所有不同值。一个sql查询应该是这样的 "Select distinct makeId, makeName from vehicle where yearId =1991". 请告诉我，如何在Elasticsearch（5.1）中实现相同的目标

Answer 1

您可以使用terms aggregation来实现：

{
  "query": {
    "term": {
      "yearId": 1991
    }
  },
  "aggs": {
    "make_ids": {
      "terms": {
        "field": "makeId"
      }
    },
    "make_names": {
      "terms": {
        "field": "makeName"
      }
    }
  }
}

但是，我非常确定您的makeName字段属于text类型，因此您无法获得您期望的结果。如果您将该字段改为keyword，那么您将获得所需的输出。

<强>更新

{
  "query": {
    "term": {
      "yearId": 1991
    }
  },
  "aggs": {
    "make_ids": {
      "terms": {
        "field": "makeId"
      }
      "aggs": {
        "make_names": {
          "terms": {
            "field": "makeName"
          }
        }
      }
    }
  }
}

如何从elasticsearch索引中获取不同的字段

1 个答案: