【ElasticSearch（六）进阶】match匹配，match_phrase 短语匹配

【ElasticSearch（六）进阶】match匹配，match_phrase 短语匹配

一、match进行 基本类型（非字符串）精确匹配

查询 account_number 是 20 的所有结果：

GET /bank/_search
{
  "query": {
    "match": {
      "account_number": 20
    }
  }
}

返回内容：

此时max_score为1.0，该条记录的_score就是1.0，这是精确匹配。

{
  "took" : 1,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 1,
      "relation" : "eq"
    },
    "max_score" : 1.0,
    "hits" : [
      {
        "_index" : "bank",
        "_type" : "account",
        "_id" : "20",
        "_score" : 1.0,
        "_source" : {
          "account_number" : 20,
          "balance" : 16418,
          "firstname" : "Elinor",
          "lastname" : "Ratliff",
          "age" : 36,
          "gender" : "M",
          "address" : "282 Kings Place",
          "employer" : "Scentric",
          "email" : "elinorratliff@scentric.com",
          "city" : "Ribera",
          "state" : "WA"
        }
      }
    ]
  }
}

二、match进行 字符串模糊匹配查询(全文检索)

查询所有 address 中包含 Kings 的数据：

GET bank/_search
{
  "query": {
    "match": {
      "address": "Kings"
    }
  }
}

返回结果：

可以看到"address" : "282 Kings Place" 和"address" : "305 Kings Hwy"两条记录都返回了

{
  "took" : 6,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 2,
      "relation" : "eq"
    },
    "max_score" : 5.990829,
    "hits" : [
      {
        "_index" : "bank",
        "_type" : "account",
        "_id" : "20",
        "_score" : 5.990829,
        "_source" : {
          "account_number" : 20,
          "balance" : 16418,
          "firstname" : "Elinor",
          "lastname" : "Ratliff",
          "age" : 36,
          "gender" : "M",
          "address" : "282 Kings Place",
          "employer" : "Scentric",
          "email" : "elinorratliff@scentric.com",
          "city" : "Ribera",
          "state" : "WA"
        }
      },
      {
        "_index" : "bank",
        "_type" : "account",
        "_id" : "722",
        "_score" : 5.990829,
        "_source" : {
          "account_number" : 722,
          "balance" : 27256,
          "firstname" : "Roberts",
          "lastname" : "Beasley",
          "age" : 34,
          "gender" : "F",
          "address" : "305 Kings Hwy",
          "employer" : "Quintity",
          "email" : "robertsbeasley@quintity.com",
          "city" : "Hayden",
          "state" : "PA"
        }
      }
    ]
  }
}

*全文检索就是利用了 倒排索引表，会按照评分进行排序。

三、match_phrase 短语匹配

默认的match搜索会对搜索内容进行分词，比如：mill lane 会分成 mill 和 lane 之后搜索的结果可能包含仅有其中一项的结果，但是此类结果分数较低。

如果不希望被分词而是直接查询短语，可以使用 match_phrase 进行搜索

例子：

查询 地址包含 mill lane 的数据：

GET /bank/_search
{
  "query": {
    "match_phrase": {
      "address": "mill lane"
    }
  }
}

返回结果：

{
  "took" : 18,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 1,
      "relation" : "eq"
    },
    "max_score" : 9.507477,
    "hits" : [
      {
        "_index" : "bank",
        "_type" : "account",
        "_id" : "136",
        "_score" : 9.507477,
        "_source" : {
          "account_number" : 136,
          "balance" : 45801,
          "firstname" : "Winnie",
          "lastname" : "Holland",
          "age" : 38,
          "gender" : "M",
          "address" : "198 Mill Lane",
          "employer" : "Neteria",
          "email" : "winnieholland@neteria.com",
          "city" : "Urie",
          "state" : "IL"
        }
      }
    ]
  }
}