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ES的基本语法

时间:2023-02-06 14:12:54浏览次数:35  
标签:基本 product name doc xiaomi 语法 ES match desc

1 基本使用

  使用kibaba来执行语句

  es安装和kibaba安装:https://www.cnblogs.com/jthr/p/17075759.html

 

1)添加

  已存在会直接覆盖

PUT /jsnh/user/1
{
  "name":"kjgs",
  "age":5,
  "desc":"牛啊牛啊"
}

 

2)修改

POST /jsnh/user/1/_update
{
  "doc":{
  "name":"kjgs",
  "age":6
  }
}

 

3)查询

GET /jsnh/user/1/

 

4)删除

DELETE /jsnh/user/1/

 

2 查询

2.1 测试数据准备

PUT /product/_doc/1
{
    "name" : "xiaomi phone",
    "desc" :  "shouji zhong de zhandouji",
    "price" :  3999,
    "tags": [ "xingjiabi", "fashao", "buka" ]
}
PUT /product/_doc/2
{
    "name" : "xiaomi nfc phone",
    "desc" :  "zhichi quangongneng nfc,shouji zhong de jianjiji",
    "price" :  4999,
    "tags": [ "xingjiabi", "fashao", "gongjiaoka" ]
}


PUT /product/_doc/3
{
    "name" : "nfc phone",
    "desc" :  "shouji zhong de hongzhaji",
    "price" :  2999,
    "tags": [ "xingjiabi", "fashao", "menjinka" ]
}

PUT /product/_doc/4
{
    "name" : "xiaomi erji",
    "desc" :  "erji zhong de huangmenji",
    "price" :  999,
    "tags": [ "low", "bufangshui", "yinzhicha" ]
}

PUT /product/_doc/5
{
    "name" : "hongmi erji",
    "desc" :  "erji zhong de kendeji",
    "price" :  399,
    "tags": [ "lowbee", "xuhangduan", "zhiliangx" ]
}

 

2.2 简单查询

1)查询product/_doc下所有

GET /product/_doc/_search

 

2)简单条件查询

  返回name中包含xiaomi或者phone的关键字的

  es采取的是关键字查询索引,xiaomi phone会被分词分为 xiaomi和phone,再去查找索引

GET /product/_doc/_search?q=name:xiaomi phone

 

3)简单条件+分页排序

  页码为0,每页为2,安装price排正序

GET /product/_doc/_search?q=name:xiaomi phone&from=0&size=2&sort=price:asc

 

2.3 复杂查询

1)查询所有

    GET /product/_doc/_search
{
  "query":{
    "match_all": {}
  }
}

 

2)单字段条件查询

  返回name中包含xiaomi或者phone关键字的

        GET /product/_doc/_search
{
  "query":{
    "match": {
      "name":"xiaomi phone"
    }
  }
}

 

3)多字段条件匹配

  查询name字段或desc字段中包含phone关键字的的,multi_match多个字段单条件去匹配

    GET /product/_doc/_search
{
  "query":{
    "multi_match": {
      "query":"phone",
      "fields":["name","desc"]
    }
  }
}

 

4)排序

    GET /product/_doc/_search
{
  "query":{
    "multi_match": {
      "query":"phone",
      "fields":["name","desc"]
    }
  },
  "sort":{
    "price":"asc"
  }
}

 

5)指定返回字段

  只返回字段name和price

    GET /product/_doc/_search
{
  "query":{
    "multi_match": {
      "query":"phone",
      "fields":["name","desc"]
    }
  },
  "sort":{
    "price":"asc"
  },
  "_source":["name","price"]
}

 

6)分页

GET /product/_doc/_search
{
  "query":{
    "multi_match": {
      "query":"phone",
      "fields":["name","desc"]
    }
  },
  "sort":{
    "price":"asc"
  },
  "_source":["name","price"],
  "from":0,
  "size":2
}

 

7)不分词查询

  获取name包含关键字xiaomi erji的,由于关键字中没有xiaomi erji,只有xiaomi和erji这两个关键字,所以查不到

GET /product/_doc/_search
{
  "query":{
    "term": {
      "name":"xiaomi erji"
    }
  },
  "sort":{
    "price":"asc"
  },
  "_source":["name","price"],
  "from":0,
  "size":2
}

 

8)不分词查询

  获取name包含关键字包含xiaomi erji或者phone关键字的

    GET /product/_doc/_search
{
  "query":{
    "terms": {
      "name":["hongmi erji","phone"]
    }
  },
  "sort":{
    "price":"asc"
  },
  "_source":["name","price"],
  "from":0,
  "size":2
}

 

9)验证分词会怎么分

  查询字符串"xiaomi nfc zhineng phone huhu"会被分成哪几个关键词

 GET /_analyze
{
  "analyzer": "standard",
  "text":"xiaomi nfc zhineng phone huhu"
}

 

10)短语搜索

  查询name中包含xiaomi nfc的,它这里不是根据关键字去匹配的,相当于sql里面的模糊查询

GET /product/_doc/_search
{
  "query":{
    "match_phrase": {
      "name":"xiaomi nfc"
    }
  }
}

  

2.4 组合条件查询

  bool标识组合条件

 

2.4.1 must

  must标识必须满足的条件

 

1)查询name中包含xiaomi关键字的并且desc中包含shouji关键字的

{
  "query":{
    "bool":{
      "must":
      [
        {
          "match":{
            "name":"xiaomi"
          }
        },
        {
          "match":{
            "desc":"shouji"
          }
        }
      ]
    }
  }
}

 

2.4.2 filter

  filter也是必须满足的条件,和must的区别是不计相关度分数。

 

1)查询name包含xiaomi关键字的,desc包含shouji关键字的,price大于4000的(这个条件不参与相关度分数的计算)

GET /product/_doc/_search
{
  "query":{
    "bool":{
      "must":
      [
        {
          "match":{
            "name":"xiaomi"
          }
        },
        {
          "match":{
            "desc":"shouji"
          }
        }
      ],
      "filter":[
          {
            "range":{
              "price":{
                "gt":4000
              }
            }
          }
        ]
    }
  }
}

 

2.4.3 should

  相当于or匹配

  minimum_should_match表示shoule中的条件有几个必须满足,可以为0。

  如果bool查询包含至少一个should子句,而没有must或 filter子句,则默认值为1。否则,默认值为0

 

1)查询出name包含xiaomi关键字或者desc包含shouji关键字的 

    GET /product/_doc/_search
{
  "query":{
    "bool":{
      "should":
      [
        {
          "match":{
            "name":"xiaomi"
          }
        },
        {
          "match":{
            "desc":"shouji"
          }
        }
      ],
      "minimum_should_match":1
    }
  }
}

 

2)查询出name包含xiaomi关键字并且desc包含shouji关键字的

    GET /product/_doc/_search
{
  "query":{
    "bool":{
      "should":
      [
        {
          "match":{
            "name":"xiaomi"
          }
        },
        {
          "match":{
            "desc":"shouji"
          }
        }
      ],
      "minimum_should_match":2
    }
  }
}

 

3)如下,因为存在must,所以minimum_should_match值为0,相当于should里的条件不存在,也就是查询price大于1999的

GET /product/_doc/_search
{
  "query":{
    "bool":{
      "should":
      [
        {
          "match":{
            "name":"xiaomi"
          }
        },
        {
          "match":{
            "desc":"shouji"
          }
        }
      ],
      "must":[
          {
            "range":{
              "price":{
                "gt":1999
              }
            }
          }
        ]
    }
  }
}

 

4)查询价格大于1999,并且(name包含xiaomi关键字或者desc包含shouji关键字)

GET /product/_doc/_search
{
  "query":{
    "bool":{
      "should":
      [
        {
          "match":{
            "name":"xiaomi"
          }
        },
        {
          "match":{
            "desc":"shouji"
          }
        }
      ],
      "minimum_should_match":1,
      "must":[
          {
            "range":{
              "price":{
                "gt":1999
              }
            }
          }
        ]
    }
  }
}

 

5)查询价格大于1999,并且(name包含xiaomi关键字,并且desc包含shouji关键字)

GET /product/_doc/_search
{
  "query":{
    "bool":{
      "should":
      [
        {
          "match":{
            "name":"xiaomi"
          }
        },
        {
          "match":{
            "desc":"shouji"
          }
        }
      ],
      "minimum_should_match":2,
      "must":[
          {
            "range":{
              "price":{
                "gt":1999
              }
            }
          }
        ]
    }
  }
}

 

2.4.4 must not 

  必须不满足,且不计算相关度分数

 

1)查询价格不能大于4000的,也就是价格小于等于4000的

GET /product/_doc/_search
{
  "query":{
    "bool":{
      "must_not":[
          {
            "range":{
              "price":{
                "gt":4000
              }
            }
          }
        ]
    }
  }
}

 

标签:基本,product,name,doc,xiaomi,语法,ES,match,desc
From: https://www.cnblogs.com/jthr/p/17089800.html

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