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(function() {
"use strict";
load("jstests/libs/optimizer_utils.js"); // For checkCascadesOptimizerEnabled.
if (!checkCascadesOptimizerEnabled(db)) {
jsTestLog("Skipping test because the optimizer is not enabled");
return;
}
const coll = db.cqf_group;
coll.drop();
assert.commandWorked(coll.insert([
{a: 1, b: 1, c: 1},
{a: 1, b: 2, c: 2},
{a: 1, b: 2, c: 3},
{a: 2, b: 1, c: 4},
{a: 2, b: 1, c: 5},
{a: 2, b: 2, c: 6},
]));
const res = coll.explain("executionStats").aggregate([
{$group: {_id: {a: '$a', b: '$b'}, sum: {$sum: '$c'}, avg: {$avg: '$c'}}}
]);
assertValueOnPlanPath("GroupBy", res, "child.child.nodeType");
assert.eq(4, res.executionStats.nReturned);
}());
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