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/**
* Test that queries eligible for OR-pushdown optimization do not crash the server when the
* 'disableMatchExpressionOptimization' failpoint is enabled.
*
* Originally designed to reproduce SERVER-70597.
*/
(function() {
"use strict";
const conn = MongoRunner.runMongod();
const db = conn.getDB("test");
assert.commandWorked(
db.adminCommand({configureFailPoint: "disableMatchExpressionOptimization", mode: "alwaysOn"}));
const coll = db.getCollection(jsTestName());
coll.drop();
assert.commandWorked(coll.createIndex({a: 1, b: 1}));
let docs = [];
for (let a = 1; a <= 3; ++a) {
for (let b = 1; b <= 3; ++b) {
docs.push({a, b});
}
}
assert.commandWorked(coll.insert(docs));
// This query has a nested $and, and a one-argument contained $or. Normally we canonicalize this
// predicate by flattening the $and and unwrapping the $or. The OR-pushdown optimization assumes the
// predicate has been canonicalized, but this assumption is broken by the failpoint.
const results = coll.aggregate([
{$match: {$and: [{$and: [{a: 2}]}, {$or: [{b: 3}]}]}},
{$unset: "_id"},
])
.toArray();
assert.eq(results, [{a: 2, b: 3}]);
MongoRunner.stopMongod(conn);
})();
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