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                ThinkChat2.0新版上線,更智能更精彩,支持會話、畫圖、視頻、閱讀、搜索等,送10W Token,即刻開啟你的AI之旅 廣告
                # _index field 原文鏈接 : [https://www.elastic.co/guide/en/elasticsearch/reference/5.3/mapping-index-field.html](https://www.elastic.co/guide/en/elasticsearch/reference/5.3/mapping-index-field.html) 譯文鏈接 : [http://www.apache.wiki/display/Elasticsearch/_id+field](http://www.apache.wiki/display/Elasticsearch/_id+field) 貢獻者 : [朱彥安](/display/~zhuyanan),[ApacheCN](/display/~apachecn),[Apache中文網](/display/~apachechina) 當跨多個索引執行查詢時,有時需要添加僅與某些索引相關聯的查詢子句。該 **_index**字段允許在索引文檔上進行索引的匹配。它可以在 **term**,**terms** 查詢,**aggregations**(聚合)?,?**scripts**(腳本) ,?**sorting**(排序)中使用 :? 注意 : 該 **_index** 被表現為虛擬字段 - 它不會作為實際字段添加到 **Lucene** 索引。這意味著您可以使用 **term**?或 **terms**?查詢(或任何重寫到 **term**?查詢的查詢,如 **match** , **query_string** 或 **simple_query_string** 查詢) **_index** 字段,但不支持 **prefix(前綴)** , **wildcard(通配符)**, **regexp(正則表達式)**或 **fuzzy(模糊查詢)**。 ``` # Example documents curl -XPUT 'localhost:9200/index_1/my_type/1?pretty' -H 'Content-Type: application/json' -d' { "text": "Document in index 1" } ' curl -XPUT 'localhost:9200/index_2/my_type/2?refresh=true&pretty' -H 'Content-Type: application/json' -d' { "text": "Document in index 2" } ' curl -XGET 'localhost:9200/index_1,index_2/_search?pretty' -H 'Content-Type: application/json' -d' { "query": { "terms": { "_index": ["index_1", "index_2"] # 1 } }, "aggs": { "indices": { "terms": { "field": "_index", # 2 "size": 10 } } }, "sort": [ { "_index": { # 3 "order": "asc" } } ], "script_fields": { "index_name": { "script": { "lang": "painless", "inline": "doc[\u0027_index\u0027]" # 4 } } } } ' ``` | 1 | 查詢 **_index** 字段 | | 2 | 聚合 **_index** 字段 | | 3 | 在 **_index** 字段上排序 | | 4 | 在腳本中訪問 **_index** 字段 |
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