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elasticSearch的_all查询关键字(在所有索引中查询)

发布时间：2021-08-23 14:39:25编辑：雪饮阅读（）

 ElasticSearch中用_all可以不限制索引，即在所有索引中查询某个信息。

如请求：http://localhost:9200/_all/_search

请求方法post

请求体如：

{

   "query":{

      "query_string":{

         "query":"Central"

      }

   }

}

那么在这里就是使用了所有索引，并在这些索引中去查询”Central”单词。

则其postman请求结果如：

{

    "took": 20,

    "timed_out": false,

    "_shards": {

        "total": 3,

        "successful": 3,

        "skipped": 0,

        "failed": 0

    },

    "hits": {

        "total": {

            "value": 2,

            "relation": "eq"

        },

        "max_score": 1.0417082,

        "hits": [

            {

                "_index": "schools",

                "_type": "school",

                "_id": "1",

                "_score": 1.0417082,

                "_source": {

                    "name": "Central School",

                    "description": "CBSE Affiliation",

                    "street": "Nagan",

                    "city": "paprola",

                    "state": "HP",

                    "zip": "176115",

                    "location": [

                        31.8955385,

                        76.8380405

                    ],

                    "fees": 2000,

                    "tags": [

                        "Senior Secondary",

                        "beautiful campus"

                    ],

                    "rating": "3.5"

                }

            },

            {

                "_index": "schools2",

                "_type": "school",

                "_id": "1",

                "_score": 1.0417082,

                "_source": {

                    "name": "Central School",

                    "description": "CBSE Affiliation",

                    "street": "Nagan",

                    "city": "paprola",

                    "state": "HP",

                    "zip": "176115",

                    "location": [

                        31.8955385,

                        76.8380405

                    ],

                    "fees": 2000,

                    "tags": [

                        "Senior Secondary",

                        "beautiful campus"

                    ],

                    "rating": "3.5"

                }

            }

        ]

    }

}