es指定返回的字段

2.7.6 指定返回的字段

GET /lib3/user/_search { "_source": ["address","name"], "query": { "match": { "interests": "changge" } } }

2.7.7控制加载的字段

GET /lib3/user/_search { "query": { "match_all": {} },

"_source": {
      "includes": ["name","address"],
      "excludes": ["age","birthday"]
  }

}

使用通配符*

GET /lib3/user/_search { "_source": { "includes": "addr*", "excludes": ["name","bir*"]

},
"query": {
    "match_all": {}
}

}

2.7.8 排序

使用sort实现排序： desc:降序，asc升序

GET /lib3/user/_search { "query": { "match_all": {} }, "sort": [ { "age": { "order":"asc" } } ]

}

GET /lib3/user/_search { "query": { "match_all": {} }, "sort": [ { "age": { "order":"desc" } } ]

}

2.7.9 前缀匹配查询

GET /lib3/user/_search { "query": { "match_phrase_prefix": { "name": { "query": "zhao" } } } }

2.7.10 范围查询

range:实现范围查询

参数：from,to,include_lower,include_upper,boost

include_lower:是否包含范围的左边界，默认是true

include_upper:是否包含范围的右边界，默认是true

GET /lib3/user/_search { "query": { "range": { "birthday": { "from": "1990-10-10", "to": "2018-05-01" } } } }

GET /lib3/user/_search { "query": { "range": { "age": { "from": 20, "to": 25, "include_lower": true, "include_upper": false } } } }

2.7.11 wildcard查询

允许使用通配符* 和 ?来进行查询

*代表0个或多个字符

？代表任意一个字符

GET /lib3/user/_search { "query": { "wildcard": { "name": "zhao*" } } }

GET /lib3/user/_search { "query": { "wildcard": { "name": "li?i" } } }

2.7.12 fuzzy实现模糊查询

value：查询的关键字

boost：查询的权值，默认值是1.0

min_similarity:设置匹配的最小相似度，默认值为0.5，对于字符串，取值为0-1(包括0和1);对于数值，取值可能大于1;对于日期型取值为1d,1m等，1d就代表1天

prefix_length:指明区分词项的共同前缀长度，默认是0

max_expansions:查询中的词项可以扩展的数目，默认可以无限大

GET /lib3/user/_search { "query": { "fuzzy": { "interests": "chagge" } } }

GET /lib3/user/_search { "query": { "fuzzy": { "interests": { "value": "chagge" } } } }

2.7.13 高亮搜索结果

GET /lib3/user/_search { "query":{ "match":{ "interests": "changge" } }, "highlight": { "fields": { "interests": {} } } }

2.8 Filter查询

filter是不计算相关性的，同时可以cache。因此，filter速度要快于query。

POST /lib4/items/_bulk {"index": {"_id": 1}}

{"price": 40,"itemID": "ID100123"}

{"index": {"_id": 2}}

{"price": 50,"itemID": "ID100124"}

{"index": {"_id": 3}}

{"price": 25,"itemID": "ID100124"}

{"index": {"_id": 4}}

{"price": 30,"itemID": "ID100125"}

{"index": {"_id": 5}}

{"price": null,"itemID": "ID100127"}

####2.8.1 简单的过滤查询

GET /lib4/items/_search { "post_filter": { "term": { "price": 40 } } }

GET /lib4/items/_search { "post_filter": { "terms": { "price": [25,40] } } }

GET /lib4/items/_search { "post_filter": { "term": { "itemID": "ID100123" } } }

查看分词器分析的结果：

GET /lib4/_mapping

不希望商品id字段被分词，则重新创建映射

DELETE lib4

PUT /lib4 { "mappings": { "items": { "properties": { "itemID": { "type": "text", "index": false } } } } }