实践005-elasticsearch的Search API概览 elasticsearch

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Search API概览 1. Search API分两种

URI Search: 在URI中使用查询参数
Request Body Search：使用ES提供的，基于JSON格式的更加完备的DSL:

Query Domain Specific Language 查询领域特定语言

2. 指定查询的索引

语法	范围
/_search	集群上的所有index
/index1/_search	index1上查询
/index1,index2/_search	index1和index2
/index*/_search	通配符匹配：index开头的索引名相关的索引上查询

3. 查询数据准备：ES中的usersindex里的数据一览

_index	_type	_id	▲_score	name	age	gender	birth
users	_doc	1	1	niewj	36	male	1985-01-01
users	_doc	3	1	lifubo	33	male
users	_doc	4	1	weibinbin	32	male
users	_doc	2	1	nie	26	male	1995-02-02

4. URI查询
4.1 curl方式在命令行使用"q", 指定查询字符串； "query string syntax", KV键值对：

curl -XGET --user username:password "http://localhost:9200/users/_search?q=name:nie"

结果：

{ "took": 4, "timed_out": false, "_shards": { "total": 1, "successful": 1, "skipped": 0, "failed": 0 }, "hits": { "total": { "value": 1, "relation": "eq" }, "max_score": 0.87546873, "hits": [ { "_index": "users", "_type": "_doc", "_id": "2", "_score": 0.87546873, "_source": { "name": "nie", "age": 26, "gender": "male", "birth": "1995-02-02" } } ] } }

4.2 在kibana DevTools里：

GET /users/_search?q=name:nie

结果：

{ "took" : 0, "timed_out" : false, "_shards" : { "total" : 1, "successful" : 1, "skipped" : 0, "failed" : 0 }, "hits" : { "total" : { "value" : 1, "relation" : "eq" }, "max_score" : 0.87546873, "hits" : [ { "_index" : "users", "_type" : "_doc", "_id" : "2", "_score" : 0.87546873, "_source" : { "name" : "nie", "age" : 26, "gender" : "male", "birth" : "1995-02-02" } } ] } }

5.Request Body Search
支持 GET、POST
5.1 curl方式在命令行

curl -XGET --user username:password "http://localhost:9200/users/_search"-H 'Content-Type:application/json' -d '{"query":{"match":{"name":"nie"}}}'

username:替换成自己的用户名
password：替换成自己的密码

结果：

{ "took": 0, "timed_out": false, "_shards": { "total": 1, "successful": 1, "skipped": 0, "failed": 0 }, "hits": { "total": { "value": 1, "relation": "eq" }, "max_score": 0.87546873, "hits": [ { "_index": "users", "_type": "_doc", "_id": "2", "_score": 0.87546873, "_source": { "name": "nie", "age": 26, "gender": "male", "birth": "1995-02-02" } } ] } }

5.2 在kibana DevTools里

GET /users/_search { "query": { "match": { "name": "nie" } } }

【实践005-elasticsearch的Search API概览】结果

{ "took" : 0, "timed_out" : false, "_shards" : { "total" : 1, "successful" : 1, "skipped" : 0, "failed" : 0 }, "hits" : { "total" : { "value" : 1, "relation" : "eq" }, "max_score" : 0.87546873, "hits" : [ { "_index" : "users", "_type" : "_doc", "_id" : "2", "_score" : 0.87546873, "_source" : { "name" : "nie", "age" : 26, "gender" : "male", "birth" : "1995-02-02" } } ] } }