ElasticSearch(7.2.2)-搜索的简单使⽤

搜索的简单使⽤

准备⼯作

• • 
    
• 删掉nba索引

• DELETE localhost:9200/nba

• 新建⼀个索引,并且指定mapping

• PUT localhost:9200/nba

• 
  

{
  "mappings": {
    "properties": {
      "name": {
        "type": "text"
      },
      "team_name": {
        "type": "text"
      },
      "position": {
        "type": "text"
      },
      "play_year": {
        "type": "long"
      },
      "jerse_no": {
        "type": "keyword"
      }
    }
  }
}

新增document

• PUT localhost:9200/nba/_doc/1

{
   "name": "哈登",
   "team_name": "⽕箭",
   "position": "得分后卫",
   "play_year": 10,
   "jerse_no": "13"
}

• PUT localhost:9200/nba/_doc/2

{
   "name": "库⾥",
   "team_name": "勇⼠",
   "position": "控球后卫",
   "play_year": 10,
   "jerse_no": "30"
}

• PUT localhost:9200/nba/_doc/3

{
   "name": "詹姆斯",
   "team_name": "湖⼈",
   "position": "⼩前锋",
   "play_year": 15,
   "jerse_no": "23"
}

term(词条)查询和full text(全⽂)查询

• • 
    
• ​词条查询​：词条查询不会分析查询条件，只有当词条和查询字符串完全匹配时，才匹配搜索。
• ​全⽂查询​：ElasticSearch引擎会先分析查询字符串，将其拆分成多个分词，只要已分析的字段中包含词条的任意⼀个，或全部包含，就匹配查询条件，返回该⽂档；如果不包含任意⼀个分词，表示没有任何⽂档匹配查询条件
  • 
    

单条term查询

• POST localhost:9200/nba/_search

{
  "query": {
    "term": {
      "jerse_no": "23"
    }
  }
}

多条term查询

• POST localhost:9200/nba/_search

{
  "query": {
    "terms": {
      "jerse_no": [
        "23",
        "13"
      ]
    }
  }
}

{
  "took": 21,
  "timed_out": false,
  "_shards": {
    "total": 1,
    "successful": 1,
    "skipped": 0,
    "failed": 0
  },
  "hits": {
    "total": {
      "value": 2,
      "relation": "eq"
    },
    "max_score": 1,
    "hits": [{
        "_index": "nba",
        "_type": "_doc",
        "_id": "1",
        "_score": 1,
        "_source": {
          "name": "哈登",
          "team_name": "⽕箭",
          "position": "得分后卫",
          "play_year": 10,
          "jerse_no": "13"
        }
      },
      {
        "_index": "nba",
        "_type": "_doc",
        "_id": "3",
        "_score": 1,
        "_source": {
          "name": "詹姆斯",
          "team_name": "湖⼈",
          "position": "⼩前锋",
          "play_year": 15,
          "jerse_no": "23"
        }
      }
    ]
  }
}

match_all

• POST localhost:9200/nba/_search

{
  "query": {
    "match_all": {}
  },
  "from": 0,
  "size": 10
}

{
  "took": 9,
  "timed_out": false,
  "_shards": {
    "total": 1,
    "successful": 1,
    "skipped": 0,
    "failed": 0
  },
  "hits": {
    "total": {
      "value": 3,
      "relation": "eq"
    },
    "max_score": 1,
    "hits": [{
        "_index": "nba",
        "_type": "_doc",
        "_id": "1",
        "_score": 1,
        "_source": {
          "name": "哈登",
          "team_name": "⽕箭",
          "position": "得分后卫",
          "play_year": 10,
          "jerse_no": "13"
        }
      },
      {
        "_index": "nba",
        "_type": "_doc",
        "_id": "2",
        "_score": 1,
        "_source": {
          "name": "库⾥",
          "team_name": "勇⼠",
          "position": "控球后卫",
          "play_year": 10,
          "jerse_no": "30"
        }
      },
      {
        "_index": "nba",
        "_type": "_doc",
        "_id": "3",
        "_score": 1,
        "_source": {
          "name": "詹姆斯",
          "team_name": "湖⼈",
          "position": "⼩前锋",
          "play_year": 15,
          "jerse_no": "23"
        }
      }
    ]
  }
}

match

• POST localhost:9200/nba/_search

{
  "query": {
    "match": {
      "position": "后卫"
    }
  }
}

{
  "took": 89,
  "timed_out": false,
  "_shards": {
    "total": 1,
    "successful": 1,
    "skipped": 0,
    "failed": 0
  },
  "hits": {
    "total": {
      "value": 2,
      "relation": "eq"
    },
    "max_score": 0.90630186,
    "hits": [{
        "_index": "nba",
        "_type": "_doc",
        "_id": "1",
        "_score": 0.90630186,
        "_source": {
          "name": "哈登",
          "team_name": "⽕箭",
          "position": "得分后卫",
          "play_year": 10,
          "jerse_no": "13"
        }
      },
      {
        "_index": "nba",
        "_type": "_doc",
        "_id": "2",
        "_score": 0.90630186,
        "_source": {
          "name": "库⾥",
          "team_name": "勇⼠",
          "position": "控球后卫",
          "play_year": 10,
          "jerse_no": "30"
        }
      }
    ]
  }
}

multi_match

• POST localhost:9200/nba/_update/2

{
  "doc": {
    "name": "库⾥",
    "team_name": "勇⼠",
    "position": "控球后卫",
    "play_year": 10,
    "jerse_no": "30",
    "title": "the best shooter"
  }
}

• POST localhost:9200/nba/_search

{
  "query": {
    "multi_match": {
      "query": "shooter",
      "fields": ["title", "name"]
    }
  }
}

{
  "query": {
    "multi_match": {
      "query": "shooter",
      "fields": ["*title", "name"]
    }
  }
}

match_phrase

• post localhost:9200/nba/_search

{
  "query": {
    "match_phrase": {
      "position": "得分后卫"
    }
  }
}

{
  "took": 4,
  "timed_out": false,
  "_shards": {
    "total": 1,
    "successful": 1,
    "skipped": 0,
    "failed": 0
  },
  "hits": {
    "total": {
      "value": 1,
      "relation": "eq"
    },
    "max_score": 3.0384295,
    "hits": [{
      "_index": "nba",
      "_type": "_doc",
      "_id": "1",
      "_score": 3.0384295,
      "_source": {
        "name": "哈登",
        "team_name": "⽕箭",
        "position": "得分后卫",
        "play_year": 10,
        "jerse_no": "13"
      }
    }]
  }
}

match_phrase_prefix

• POST localhost:9200/nba/_update/3

{
  "doc": {
    "name": "詹姆斯",
    "team_name": "湖⼈",
    "position": "⼩前锋",
    "play_year": 15,
    "jerse_no": "23",
    "title": "the best small forward"
  }
}

• POST localhost:9200/nba/_search

{
  "query": {
    "match_phrase_prefix": {
      "title": "the best s"
    }
  }
}