Elasticsearch

RequestBody与QueryDSL

Request Body Search

• 将查询语句通过HTTP Requedt Body发送给Elasticsearch
• Query DSL
  

分页

• From从0开始，默认返回10个结果
• 获取靠后的翻页成本较高

排序

source filtering

脚本字段

使用查询表达式- Match

短语搜索- Match Phrase

API

#ignore_unavailable=true，可以忽略尝试访问不存在的索引“404_idx”导致的报错
#查询movies分页
POST /movies,404_idx/_search?ignore_unavailable=true
{
  "profile": true,
	"query": {
		"match_all": {}
	}
}

POST /kibana_sample_data_ecommerce/_search
{
  "from":10,
  "size":20,
  "query":{
    "match_all": {}
  }
}


#对日期排序
POST kibana_sample_data_ecommerce/_search
{
  "sort":[{"order_date":"desc"}],
  "query":{
    "match_all": {}
  }

}

#source filtering
POST kibana_sample_data_ecommerce/_search
{
  "_source":["order_date"],
  "query":{
    "match_all": {}
  }
}


#脚本字段
GET kibana_sample_data_ecommerce/_search
{
  "script_fields": {
    "new_field": {
      "script": {
        "lang": "painless",
        "source": "doc['order_date'].value+'hello'"
      }
    }
  },
  "query": {
    "match_all": {}
  }
}


POST movies/_search
{
  "query": {
    "match": {
      "title": "last christmas"
    }
  }
}

POST movies/_search
{
  "query": {
    "match": {
      "title": {
        "query": "last christmas",
        "operator": "and"
      }
    }
  }
}

POST movies/_search
{
  "query": {
    "match_phrase": {
      "title":{
        "query": "one love"

      }
    }
  }
}

POST movies/_search
{
  "query": {
    "match_phrase": {
      "title":{
        "query": "one love",
        "slop": 1

      }
    }
  }
}

Query String & Simple Query String查询

Query String Query

• 类似URI Query

Simple Query String Query

• 类似Query String，但是会忽略错误的语法，同时只支持部分查询语法
• 不支持AND OR NOT，会当作字符串处理
• Term之间默认的关系是OR，可以指定Operator
• 支持部分逻辑
  • +替代AND
  • | 替代OR
  • — 替代NOT

API

PUT /users/_doc/1
{
  "name":"Ruan Yiming",
  "about":"java, golang, node, swift, elasticsearch"
}

PUT /users/_doc/2
{
  "name":"Li Yiming",
  "about":"Hadoop"
}


POST users/_search
{
  "query": {
    "query_string": {
      "default_field": "name",
      "query": "Ruan AND Yiming"
    }
  }
}


POST users/_search
{
  "query": {
    "query_string": {
      "fields":["name","about"],
      "query": "(Ruan AND Yiming) OR (Java AND Elasticsearch)"
    }
  }
}


#Simple Query 默认的operator是 Or
POST users/_search
{
  "query": {
    "simple_query_string": {
      "query": "Ruan AND Yiming",
      "fields": ["name"]
    }
  }
}


POST users/_search
{
  "query": {
    "simple_query_string": {
      "query": "Ruan Yiming",
      "fields": ["name"],
      "default_operator": "AND"
    }
  }
}


GET /movies/_search
{
	"profile": true,
	"query":{
		"query_string":{
			"default_field": "title",
			"query": "Beafiful AND Mind"
		}
	}
}


# 多fields
GET /movies/_search
{
	"profile": true,
	"query":{
		"query_string":{
			"fields":[
				"title",
				"year"
			],
			"query": "2012"
		}
	}
}



GET /movies/_search
{
	"profile":true,
	"query":{
		"simple_query_string":{
			"query":"Beautiful +mind",
			"fields":["title"]
		}
	}
}