Start the server with the attached database.

Run the following in the Mongo Console:

> db.properties.find({ '46' :

{ $gt : 10 }

})

You should get one result.

> db.properties.ensureIndex(

{ '46' : 1}

)
true
> db.properties.find({ '46' :

{ $gt : 10 }

})

You should get zero results.

> db.properties.dropIndex(

{ '46' : 1}

)

{"nIndexesWas" : 2 , "ok" : 1}

> db.properties.find({ '46' :

{ $gt : 10 }

})

You should get one result again.