Mongodb全文檢索索引

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1. //插入測試資料 有列name和description
2. > db.stores.insert(
3. ... [
4. ... { _id: 1, name: "Java Hut", description: "Coffee and cakes" },
5. ... { _id: 2, name: "Burger Buns", description: "Gourmet hamburgers" },
6. ... { _id: 3, name: "Coffee Shop", description: "Just coffee" },
7. ... { _id: 4, name: "Clothes Clothes Clothes", description: "Discount clothing" },
8. ... { _id: 5, name: "Java Shopping", description: "Indonesian goods" }
9. ... ]
10. ... )
11. BulkWriteResult({
12.    "writeErrors" : [ ],
13.    "writeConcernErrors" : [ ],
14.    "nInserted" : 5,
15.    "nUpserted" : 0,
16.    "nMatched" : 0,
17.    "nModified" : 0,
18.    "nRemoved" : 0,
19.    "upserted" : [ ]
20. })
21. //在stores上建立所以 包含name列和description都是文本
22. > db.stores.createIndex( { name: "text", description: "text" } )
23. {
24.    "createdCollectionAutomatically" : false,
25.    "numIndexesBefore" : 1,
26.    "numIndexesAfter" : 2,
27.    "ok" : 1
28. }
29. //執行全文檢索索引 會將關鍵字分詞 然後匹配結果還可以 由於資料量小 速度就測不出來了
30. > db.stores.find( { $text: { $search: "java coffee shop" } } )
31. { "_id" : 3, "name" : "Coffee Shop", "description" : "Just coffee" }
32. { "_id" : 1, "name" : "Java Hut", "description" : "Coffee and cakes" }
33. { "_id" : 5, "name" : "Java Shopping", "description" : "Indonesian goods" }

優勢：即時的全文檢索索引。

不知道效能如何，不支援高亮這種展示，只有在3.2+的版本才支援中文分詞。

大致瞭解下，暫時不會用到，以後用到可以詳細看手冊：

https://docs.mongodb.com/manual/text-search/

Mongodb全文檢索索引