RESTful接口URL的格式:
http://IP:9200/<index>/<type>/[<id>]
- 其中index、type是必须提供的。
- id是可选的,不提供es会自动生成。
- index、type将信息进行分层,利于管理。
- index可以理解为数据库;type理解为数据表;id相当于数据库表中记录的主键,是唯一的。
RESTful接口URL的增删改查:
添加数据
- #向store索引中添加一些书籍
curl -XPUT 'http://IP:9200/store/books/1' -d '{ "title": "Elasticsearch: The Definitive Guide", "name" : { "first" : "Zachary", "last" : "Tong" }, "publish_date":"2015-02-06", "price":"49.99" }'
- #再添加一个书的信息
curl -XPUT 'http://IP:9200/store/books/2' -d '{ "title": "Elasticsearch Blueprints", "name" : { "first" : "Vineeth", "last" : "Mohan" }, "publish_date":"2015-06-06", "price":"35.99" }'
查询
- #在linux中通过curl的方式查询
curl -XGET 'http://IP:9200/store/books/1'
- #通过浏览器查询
http://IP:9200/store/books/1
- # 通过_source获取指定的字段
curl -XGET 'http://IP:9200/store/books/1?_source=title' curl -XGET 'http://IP:9200/store/books/1?_source=title,price' curl -XGET 'http://IP:9200/store/books/1?_source'
更新
- #可以通过覆盖的方式更新
curl -XPUT 'http://IP:9200/store/books/1' -d '{ "title": "Elasticsearch: The Definitive Guide", "name" : { "first" : "Zachary", "last" : "Tong" }, "publish_date":"2016-02-06", "price":"99.99" }'
- # 或者通过 _update API的方式单独更新你想要更新的
curl -XPOST 'http://IP:9200/store/books/1/_update' -d '{ "doc": { "price" : 88.88 } }' curl -XGET 'http://IP:9200/store/books/1'
删除
- #删除一个文档
curl -XDELETE 'http://IP:9200/store/books/1'
高级查询
最简单filter查询
- 类似 :SELECT * FROM books WHERE price = 35.99
# 首先添加一条数据 curl -XPUT 'http://IP:9200/store/books/4' -d '{ "title": "Elasticsearch: The Definitive Guide", "author": "Guide", "publish_date":"2016-02-06", "price":"35.99" }'
- # filtered 查询价格是35.99的
- # 返回的的分是1.0
curl -XGET 'http://IP:9200/store/books/_search' -d '{ "query": { "bool": { "must": { "match_all": {} }, "filter": { "term": { "price": 35.99 } } } } }'
- # 返回的的分是1.0
curl -XGET 'http://IP:9200/store/books/_search' -d '{ "query": { "constant_score": { "filter": { "term": { "price": 35.99 } } } } }'
- # 返回的的分是0.0
指定多个值查询
curl -XGET 'http://IP:9200/store/books/_search' -d '{ "query" : { "bool" : { "filter" : { "terms" : { "price" : [35.99, 99.99] } } } } }'
curl -XGET 'http://IP:9200/store/books/_search' -d '{ "query" : { "bool" : { "must": { "match_all": {} }, "filter" : { "terms" : { "price" : [35.99, 99.99] } } } } }'
- # SELECT * FROM books WHERE publish_date = "2015-02-06"
curl -XGET 'http://IP:9200/store/books/_search' -d '{ "query" : { "bool" : { "filter" : { "term" : { "publish_date" : "2015-02-06" } } } } }'
嵌套查询
# bool过滤查询,可以做组合过滤查询
- 类似:SELECT * FROM books WHERE (price = 35.99 OR price = 99.99) AND publish_date != "2016-02-06"
# 类似的,Elasticsearch也有 and, or, not这样的组合条件的查询方式
# 格式如下:
{ "bool" : { "must" : [], "should" : [], "must_not" : [], } }
- # must: 条件必须满足,相当于 and
- # should: 条件可以满足也可以不满足,相当于 or
- # must_not: 条件不需要满足,相当于 not
curl -XGET 'http://IP:9200/store/books/_search' -d '{ "query" : { "bool" : { "should" : [ { "term" : {"price" : 35.99}}, { "term" : {"price" : 99.99}} ], "must_not" : { "term" : {"publish_date" : "2016-02-06"} } } } }'
range范围过滤
- 类似: SELECT * FROM books WHERE price >= 10 AND price < 99
- # gt : > 大于
- # lt : < 小于
- # gte : >= 大于等于
- # lte : <= 小于等于
curl -XGET 'http://IP:9200/store/books/_search' -d '{ "query": { "range" : { "price" : { "gte" : 10, "lt" : 99 } } } }
- #name和author都必须包含Guide,并且价钱等于33.99或者188.99
curl -XGET 'http://IP:9200/store/books/_search' -d '{ "query": { "bool": { "must": { "multi_match": { "operator": "and", "fields": [ "name", "author" ], "query": "Guide" } }, "filter": { "terms": { "price": [ 35.99, 188.99 ] } } } } }'
参考来源:https://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl.html