在elasticsearch中有没有类似于子查询的功能?

kq4fsx7k  于 2023-01-29  发布在  ElasticSearch
关注(0)|答案(1)|浏览(218)

我想在elasticsearch中扮演一个subquery的角色,让我们看看下面的例子。
1.创建索引

PUT test_index
{
  "mappings" : {
    "properties" : {
      "human" : {
        "type" : "nested",
        "properties" : {
          "age" : {
            "type" : "integer"
          },
          "name" : {
            "type" : "text"
          }
        }
      }
    }
  }
}

1.插入索引样本数据

POST test_index/_doc/1
{
  "human": [
    {
      "name": "adrian",
      "age" : 24
    },
    {
      "name": "simon",
      "age" : 26
    },
    {
      "name": "michale",
      "age" : 24
    },
    {
      "name": "beom",
      "age" : 25
    },
    {
      "name": "simon",
      "age" : 24
    }
  ]
}

在这种情况下,如果doc满足条件human.name==“adrian”和human.name =“simon”,我希望得到一个结果,如下所示

{
  "took" : 0,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 1,
      "relation" : "eq"
    },
    "max_score" : 0.87546873,
    "hits" : [
      {
        "_index" : "test_index",
        "_id" : "1",
        "_score" : 0.87546873,
        "_source" : {
          "human" : [
            {
              "name" : "adrian",
              "age" : 24
            },
            {
              "name" : "simon",
              "age" : 26
            },
            {
              "name" : "michale",
              "age" : 24
            },
            {
              "name" : "beom",
              "age" : 25
            },
            {
              "name" : "simon",
              "age" : 24
            }
          ]
        }
      }
    ]
  }
}

但是当我这样尝试的时候

GET test_index/_search
{
  "query": {
    "nested": {
      "path": "human",
      "query": {
        "bool": {
          "must": [
              {
                "match": {
                  "human.name": "simon"
                }
              },
              {
                "match": {
                  "human.name": "adrian"
                }
              }
          ]
        }
      }
    }
  }
}

则结果如下

{
  "took" : 0,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 0,
      "relation" : "eq"
    },
    "max_score" : null,
    "hits" : [ ]
  }
}

有什么办法可以解决这个问题吗?

uurv41yg

uurv41yg1#

您需要使用两个嵌套查询执行以下操作,因为每个嵌套文档都是自己的文档,所以您要查找一个顶级文档,该文档包含两个必须匹配每个human.name的嵌套文档:

GET test_index/_search
{
  "query": {
    "bool": {
      "must": [
        {
          "nested": {
            "path": "human",
            "query": {
              "match": {
                "human.name": "simon"
              }
            }
          }
        },
        {
          "nested": {
            "path": "human",
            "query": {
              "match": {
                "human.name": "adrian"
              }
            }
          }
        }
      ]
    }
  }
}

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