Mongodb全文检索

Posted 2020-09-21

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//插入测试数据有列name和description
> db.stores.insert(
... [
... { _id: 1, name: "Java Hut", description: "Coffee and cakes" },
... { _id: 2, name: "Burger Buns", description: "Gourmet hamburgers" },
... { _id: 3, name: "Coffee Shop", description: "Just coffee" },
... { _id: 4, name: "Clothes Clothes Clothes", description: "Discount clothing" },
... { _id: 5, name: "Java Shopping", description: "Indonesian goods" }
... ]
... )
BulkWriteResult({
"writeErrors" : [ ],
"writeConcernErrors" : [ ],
"nInserted" : 5,
"nUpserted" : 0,
"nMatched" : 0,
"nModified" : 0,
"nRemoved" : 0,
"upserted" : [ ]
})
//在stores上建立所以包含name列和description都是文本
> db.stores.createIndex( { name: "text", description: "text" } )
{
"createdCollectionAutomatically" : false,
"numIndexesBefore" : 1,
"numIndexesAfter" : 2,
"ok" : 1
}
//执行全文检索会将关键字分词然后匹配结果还可以由于数据量小速度就测不出来了
> db.stores.find( { $text: { $search: "java coffee shop" } } )
{ "_id" : 3, "name" : "Coffee Shop", "description" : "Just coffee" }
{ "_id" : 1, "name" : "Java Hut", "description" : "Coffee and cakes" }
{ "_id" : 5, "name" : "Java Shopping", "description" : "Indonesian goods" }

优势：实时的全文检索。

不知道性能如何，不支持高亮这种展示，只有在3.2+的版本才支持中文分词。

大致了解下，暂时不会用到，以后用到可以详细看手册：

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

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