29 lines
981 B
JavaScript
29 lines
981 B
JavaScript
t = db["jstests_coveredIndex2"];
|
|
t.drop();
|
|
|
|
// Include helpers for analyzing explain output.
|
|
load("jstests/libs/analyze_plan.js");
|
|
|
|
t.save({a: 1})
|
|
t.save({a: 2})
|
|
assert.eq( t.findOne({a: 1}).a, 1, "Cannot find right record" );
|
|
assert.eq( t.count(), 2, "Not right length" );
|
|
|
|
// use simple index
|
|
t.ensureIndex({a: 1});
|
|
var plan = t.find({a:1}).explain();
|
|
assert( !isIndexOnly(plan.queryPlanner.winningPlan),
|
|
"Find using covered index but all fields are returned");
|
|
var plan = t.find({a:1}, {a: 1}).explain();
|
|
assert( !isIndexOnly(plan.queryPlanner.winningPlan),
|
|
"Find using covered index but _id is returned");
|
|
var plan = t.find({a:1}, {a: 1, _id: 0}).explain();
|
|
assert( isIndexOnly(plan.queryPlanner.winningPlan),
|
|
"Find is not using covered index");
|
|
|
|
// add multikey
|
|
t.save({a:[3,4]})
|
|
var plan = t.find({a:1}, {a: 1, _id: 0}).explain();
|
|
assert( !isIndexOnly(plan.queryPlanner.winningPlan),
|
|
"Find is using covered index even after multikey insert");
|