indexOnly should be false when sorting by a non indexed field

var coll = db.getCollection("covered_negative_1") coll.drop() for (i=0;i<100;i++) { coll.insert( {a:i, b:"strvar_"+(i%13), c:NumberInt(i%10), d: i*10, e: [i, i%10]} ) } coll.insert coll.ensureIndex( {a:1,b:-1,c:1} ) coll.ensureIndex( {e:1} ) coll.ensureIndex( {d:1} ) // Test sort on non-indexed field var plan = coll.find({d:{$lt:1000}}, {d:1, _id:0} ).sort( {c:1} ).hint( {d:1} ).explain() assert.eq(false, plan.indexOnly, "negative.1.6 - indexOnly should be false on a non covered query")