MongoDB中重建索引的方法
要重新构建索引，请使用reIndex()。让我们首先创建一个索引。查询如下
> db.demo42.createIndex({"StudentFirstName":1});这将产生以下输出：
{
"createdCollectionAutomatically" : true,
"numIndexesBefore" : 1,
"numIndexesAfter" : 2,
"ok" : 1
}> db.demo42.reIndex({"StudentFirstName":1});{
"nIndexesWas" : 2,
"nIndexes" : 2,
"indexes" : [
{
"v" : 2,
"key" : {
"_id" : 1
},
"name" : "_id_",
"ns" : "web.demo42"
},
{
"v" : 2,
"key" : {
"StudentFirstName" : 1
},
"name" : "StudentFirstName_1",
"ns" : "web.demo42"
}
],
"ok" : 1
}