来自 MongoDB 官方 JIRA 的一个新特性报告称 MongoDB 将在 2.3.2 版本中增加全文搜索功能。该功能还是体验到阶段,使用方法包括:
db.adminCommand( { setParameter : "*", textSearchEnabled : true } );
或者是:
./mongod --setParameter textSearchEnabled=true
特性:
- parsing + stemming for latin languages
- multi-word scoring
- phrase matching
- word negation
- weights per field
- additional suffix index fields for coverings
- additional prefix index fields for partitioning
- specify language per document
简单使用示例:
> db.foo.insert( { _id: 1 , desc: "the dog is running" } )> db.foo.insert( { _id: 2 , desc: "the cat is walking" } )> db.foo.ensureIndex( { "desc": "text" } )> db.foo.runCommand( "text", { search : "walk" } ){ "queryDebugString" : "walk||||||", "language" : "english", "results" : [ { "score" : 0.75, "obj" : { "_id" : 2, "desc" : "the cat is walking" } } ], "stats" : { "nscanned" : 1, "nscannedObjects" : 0, "n" : 1, "timeMicros" : 330 }, "ok" : 1}