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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 t = db.cqf_object_elemMatch;
t.drop();
assert.commandWorked(t.insert({a: [{a: 1, b: 1}, {a: 1, b: 2}]}));
assert.commandWorked(t.insert({a: [{a: 2, b: 1}, {a: 2, b: 2}]}));
assert.commandWorked(t.insert({a: {a: 2, b: 1}}));
assert.commandWorked(t.insert({a: [{b: [1, 2], c: [3, 4]}]}));
assert.commandWorked(t.insert({a: [{"": [1, 2], c: [3, 4]}]}));
{
// Object elemMatch. Currently we do not support index here.
const res = t.explain("executionStats").aggregate([{$match: {a: {$elemMatch: {a: 2, b: 1}}}}]);
assert.eq(1, res.executionStats.nReturned);
assertValueOnPlanPath("PhysicalScan", res, "child.child.child.nodeType");
}
{
// Should not be getting any results.
const res = t.explain("executionStats").aggregate([
{$match: {a: {$elemMatch: {b: {$elemMatch: {}}, c: {$elemMatch: {}}}}}}
]);
assert.eq(0, res.executionStats.nReturned);
}
{
const res = t.explain("executionStats").aggregate([{$match: {a: {$elemMatch: {"": 1}}}}]);
assert.eq(1, res.executionStats.nReturned);
assertValueOnPlanPath("PhysicalScan", res, "child.child.child.nodeType");
}
}());
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