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
}