ElasticSearch 查询

查看节点信息
GET /_cat/nodes?v

查看所有索引信息    
GET /_cat/indices?v
    
创建索引    
PUT /customer?pretty

查看指定索引信息    
GET /customer?pretty

添加数据    
PUT /customer/_doc/1?pretty
{
  "name": "张三"
}

根据id查询
GET /customer/_doc/1?pretty

PUT /customer/_doc/2?pretty
{
  "name": "李四"
}


PUT /customer/_doc/3?pretty
{
  "name": "王五"
}


PUT /customer/_doc/4?pretty
{
  "name": "赵六"
}

PUT /customer/_doc/5?pretty
{
  "name": "张无忌"
}

PUT /customer/_doc/6?pretty
{
  "name": "张无天"
}

删除索引
DELETE /customer?pretty

查询所有
GET /customer/_doc/_search?pretty

同上
GET /customer/_doc/_search
{
  "query": {
    "match_all":{}
  }
}

match查询（根据条件查询）    
GET /customer/_doc/_search
{
  "query": {
    "match": {
      "name": "张"
    }
  }
}

排序
GET /customer/_doc/_search
{
  "query": {
    "match_all":{}
  },
  "sort": [
    {
      "age": {
        "order": "desc"
      }
    }
  ]
}


分页
GET /customer/_doc/_search
{
  "query": {
    "match_all":{}
  },
  "sort": [
    {
      "age": {
        "order": "desc"
      }
    }
  ],
  "from": 4,
  "size": 2
}

match查询（短语查询）
GET /customer/_doc/_search
{
  "query": {
    "match_phrase": {
      "name": "张无"
    }
  }
}

match查询（最左前缀查询）
GET /customer/_doc/_search
{
  "query": {
    "match_phrase_prefix": {
      "name": "张无忌"
    }
  }
}

分词
POST /_analyze
{
  "analyzer": "standard",
  "text": "中国人"
}

使用PUT用于新增和修改信息，修改时必须传入所有字段。否则丢失部分数据。
只是修改部分字段，可以使用POST。

修改制定字段使用POST
POST index/type/id/_update
{
	"doc": {
		"field": "value"
	}
}

使用POST不指定id，会新增一条文档，id自动生成。
POST /customer/_doc?pretty
{
  "name": "我是POST进来的",
  "age": 28
}

布尔查询

布尔查询
must(and)
should(or)
must_not(not)
filter

### name包含张 并且 age等于28
GET /customer/_doc/_search
{
  "query": {
    "bool": {
      "must": [
        {
          "match": {
            "name": "张"
          }
        },
        {
          "match": {
            "age": "28"
          }
        }
      ]
    }
  }
}

### name包含张 或者 age等于28
GET /customer/_doc/_search
{
  "query": {
    "bool": {
      "should": [
        {
          "match": {
            "name": "张"
          }
        },
        {
          "match": {
            "age": "28"
          }
        }
      ]
    }
  }
}

### name包含张 并且 age大于18
GET /customer/_doc/_search
{
  "query": {
    "bool": {
      "must": [
        {
          "match": {
            "name": "张"
          }
        }
      ],
      "filter": {
        "range": {
          "age": {
            "gt": 18
          }
        }
      }
    }
  }
}

filter工作于bool查询内

### age大于18
GET /customer/_doc/_search
{
  "query": {
    "bool": {
      "filter": {
        "range": {
          "age": {
            "gt": 18
          }
        }
      }
    }
  }
}

range 条件筛选范围
gt 大于
gte 大于等于
lt 小于
lte 小于等于

高亮查询

### name包含张 并且 age大于18
GET /customer/_doc/_search
{
  "query": {
    "bool": {
      "must": [
        { 
          "match": {
            "name": "张"
          }
        }
      ],
      "filter": {
        "range": {
          "age": {
            "gt": 18
          }
        }
      }
    }
  },
  "highlight": {
    "fields": {
      "name": {}
    }
  }
}

将需要高亮的字段添加到fields内

自定义高亮显示
### name包含张 并且 age大于18
GET /customer/_doc/_search
{
  "query": {
    "bool": {
      "must": [
        { 
          "match": {
            "name": "张无"
          }
        }
      ],
      "filter": {
        "range": {
          "age": {
            "gt": 18
          }
        }
      }
    }
  },
  "highlight": {
    "pre_tags": "<b class='key' style='color:red'>",
    "post_tags": "</b>",
    "fields": {
      "name": {}
    }
  }
}

#### 结果字段过滤 _source
GET /customer/_doc/_search
{
  "query": {
    "match": {
      "name": "张"
    }
  },
  "_source": ["name", "age"]
}

聚合查询 aggs
sum 求和
avg 平均值
max 最大值
min 最小值
group 分组
也可以组内聚合

#### 查询所有姓名包含张，年龄总和
GET /customer/_doc/_search
{
  "query": {
    "match": {
      "name": "张"
    }
  },
  "_source": ["name", "age"],
  "aggs": {
    "sumAge": {
      "sum": {
        "field": "age"
      }
    }
  }
}

映射类型

https://www.cnblogs.com/Neeo/articles/10393961.html
#### 创建索引并指定映射关系
PUT /order
{
  "mappings": {
    "_doc": {
      "dynamic": false,
      "properties": {
        "name": {
          "type": "text"
        },
        "price": {
          "type": "double"
        }
      }
    }
  }
}
#### 查看映射
GET /order/_mapping
返回
{
  "order" : {
    "mappings" : {
      "_doc" : {
        "dynamic" : "false",
        "properties" : {
          "name" : {
            "type" : "text"
          },
          "price" : {
            "type" : "double"
          }
        }
      }
    }
  }
}

dynamic 为false时，新增数据时添加的新字段没有映射关系，无法做为查询条件。dynamic值默认为true。
dynamic 为strict时，新增数据时无法添加新的字段。

mappings 属性设置 https://www.cnblogs.com/Neeo/articles/10395524.html

https://www.cnblogs.com/Neeo/articles/10789701.html
mappings设置ignore_above
长度超过ignore_above的字符串将不会被索引。

设置属性索引index
PUT /product
{
  "mappings": {
    "doc": {
      "dynamic": false,
      "properties": {
        "name": {
          "type": "text",
          "index": true
        },
        "age": {
          "type": "long",
          "index": false
        }
      }
    }
  }
}

index 属性默认值为true，如果设置为false，那么ElasticSearch不会为该属性创建索引，也就是说无法做为主查询条件。

#### 对象属性，info 既是一个属性，也是一个对象。
PUT /user/_doc/1 
{
  "name": "张三",
  "age": 18,
  "info": {
    "addr": "北京",
    "tel": "10086"
  }
}

PUT /user/_doc/2
{
  "name": "李四",
  "age": 22,
  "info": {
    "addr": "上海",
    "tel": "10088"
  }
}

GET /user/_mapping

#### 根据info 的addr 查询
GET /user/_doc/_search
{
  "query": {
    "match": {
      "info.addr": "上海"
    }
  }
}