# ElasticSearch语法 ### 索引操作 查看集群中索引？ ``` GET /_cat/indices?v ``` 创建索引？ ``` PUT /index?pretty ``` 删除索引 ``` DELETE /index?pretty ``` ### 文档操作 新增文档 ``` PUT /index/type/id { "json数据" } ``` es默认会对document每个field都建立倒排索引，让其可以被搜索 查询文档 ``` GET /index/type/id ``` 修改文档 ``` PUT /index/type/id { "json数据" } ``` 更新文档 ``` POST /index/type/id/_update { "doc": { "field":"" } } ``` 删除文档 ``` DELETE /index/type/id ``` 查询所有文档 ``` GET /index/type/_search { "query": { "match_all": {} } } ``` match 查询名称包含xxx的文档，并按价格降序排序 ``` GET /index/type/_search { "query" : { "match" : { "name" : "xxx" } }, "sort": [ { "price": "desc" } ] } ``` match_phrase 短语搜索文档 要求输入的搜索词，必须在指定的字段文本中，完全包含一模一样的，才可以作为结果返回 ``` GET /index/type/_search { "query" : { "match_phrase" : { "producer" : "producer" } } } ``` highlight 高亮搜索文档，会将搜索词高亮显示 ``` GET /index/type/_search { "query" : { "match" : { "producer" : "producer" } }, "highlight": { "fields" : { "producer" : {} } } } ``` 分页查询文档 ``` GET /index/type/_search { "query": { "match_all": {} }, "from": 1, "size": 1 } ``` 指定某些字段查询文档 ``` GET /index/type/_search { "query": { "match_all": {} }, "_source": ["name", "price"] } ``` filter 过滤查询价格大于50的文档 ``` GET /index/type/_search { "query" : { "bool" : { "must" : { "match" : { "name" : "xxx" } }, "filter" : { "range" : { "price" : { "gt" : 50 } } } } } } ``` 分组 ``` GET /index/type/_search { "aggs": { "group_by_orderName": { "terms": { "field": "orderName" } } } } ``` 对字符串类型聚合需要将field的fielddata属性设置为true ``` PUT /index/_mapping/type { "properties": { "orderName": { "type": "text", "fielddata": true } } } ``` 平均值,分组后计算平均值 ``` GET /index/type/_search { "size": 0, "aggs" : { "group_by_orderName" : { "terms" : { "field" : "orderName" }, "aggs" : { "avg_price" : { "avg" : { "field" : "price" } } } } } } ```