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// Tests for whether the query solution correctly used an AND_SORTED stage for index intersection.
(function() {
"use strict";
load("jstests/aggregation/extras/utils.js"); // For assertArrayEq.
load("jstests/libs/analyze_plan.js"); // For planHasStage helper to analyze explain() output.
const conn = MongoRunner.runMongod();
const db = conn.getDB("test");
// Enable and force index intersections plans.
assert.commandWorked(db.adminCommand({setParameter: 1, internalQueryForceIntersectionPlans: true}));
function runAndSortedTests() {
const coll = db.and_sorted;
coll.drop();
assert.commandWorked(coll.createIndex({a: 1}));
assert.commandWorked(coll.createIndex({b: 1}));
assert.commandWorked(coll.createIndex({c: -1}));
assert.commandWorked(coll.insertMany([
{_id: 0, a: 1, b: 1, c: 1},
{_id: 1, a: 2, b: -1, c: 1},
{_id: 2, a: 0, b: 0, c: 10},
{_id: 3, a: 10, b: 1, c: -1}
]));
// Helper to check the result returned by the query and to check whether the query solution
// correctly did or did not use an AND_SORTED for index intersection.
function assertAndSortedUsed({query, expectedResult, shouldUseAndSorted} = {}) {
const queryResult = coll.find(query);
const expl = queryResult.explain();
assertArrayEq({actual: queryResult.toArray(), expected: expectedResult});
assert.eq(shouldUseAndSorted,
planHasStage(db, getWinningPlan(expl.queryPlanner), "AND_SORTED"));
}
// Test basic index intersection where we expect AND_SORTED to be used.
assertAndSortedUsed({
query: {a: 1, b: 1},
expectedResult: [{_id: 0, a: 1, b: 1, c: 1}],
shouldUseAndSorted: true
});
assert.commandWorked(coll.insertMany([
{_id: 4, a: 100, b: 100, c: 1},
{_id: 5, a: 100, b: 100, c: 2},
{_id: 6, a: 100, b: 100, c: 3},
{_id: 7, a: 100, b: 100, c: 1}
]));
assertAndSortedUsed({
query: {a: 100, c: 1},
expectedResult: [{_id: 4, a: 100, b: 100, c: 1}, {_id: 7, a: 100, b: 100, c: 1}],
shouldUseAndSorted: true
});
assertAndSortedUsed({
query: {a: 100, b: 100, c: 1},
expectedResult: [{_id: 4, a: 100, b: 100, c: 1}, {_id: 7, a: 100, b: 100, c: 1}],
shouldUseAndSorted: true
});
assertAndSortedUsed({
query: {a: 100, b: 100, c: 2},
expectedResult: [{_id: 5, a: 100, b: 100, c: 2}],
shouldUseAndSorted: true
});
assert.commandWorked(coll.insertMany(
[{_id: 8, c: 1, d: 1, e: 1}, {_id: 9, c: 1, d: 2, e: 2}, {_id: 10, c: 1, d: 2, e: 3}]));
assert.commandWorked(coll.createIndex({e: 1}));
// Test where shouldn't use AND_SORTED since no index exists on one of the fields or the query
// is on a single field.
assertAndSortedUsed({
query: {c: 1, d: 2},
expectedResult: [{_id: 9, c: 1, d: 2, e: 2}, {_id: 10, c: 1, d: 2, e: 3}],
shouldUseAndSorted: false
});
assertAndSortedUsed(
{query: {e: 1}, expectedResult: [{_id: 8, c: 1, d: 1, e: 1}], shouldUseAndSorted: false});
// Test on an empty collection.
assert(coll.drop());
assert.commandWorked(coll.createIndex({a: 1}));
assert.commandWorked(coll.createIndex({b: 1}));
assertAndSortedUsed({query: {a: 1, b: 1}, expectedResult: [], shouldUseAndSorted: true});
// Test more than two branches.
assert(coll.drop());
assert.commandWorked(coll.insertMany([
{_id: 1, a: 1, b: 2, c: 5, d: 9, e: 5},
{_id: 2, a: 1, b: 2, c: 3, d: 4, e: 5},
{_id: 3, a: 1, b: 2, c: 3, d: 4, e: 6},
{_id: 4, a: 1, b: 4, c: 3, d: 4, e: 5}
]));
assert.commandWorked(coll.createIndex({a: 1}));
assert.commandWorked(coll.createIndex({b: 1}));
assert.commandWorked(coll.createIndex({c: 1}));
assert.commandWorked(coll.createIndex({d: 1}));
assert.commandWorked(coll.createIndex({e: 1}));
assertAndSortedUsed({
query: {a: 1, b: 2, c: 3, d: 4, e: 5},
expectedResult: [{_id: 2, a: 1, b: 2, c: 3, d: 4, e: 5}],
shouldUseAndSorted: true
});
// Test with arrays, strings, and non-scalar predicates.
assert(coll.drop());
assert.commandWorked(coll.insertMany([
{_id: 1, a: 1, b: [1, 2, 3], c: "c"},
{_id: 2, a: [1, 2, 3], b: 2, c: "c"},
{_id: 3, a: 2, b: "b", c: ["a", "b", "c"]}
]));
assert.commandWorked(coll.createIndex({a: 1}));
assert.commandWorked(coll.createIndex({b: 1}));
assert.commandWorked(coll.createIndex({c: 1}));
assertAndSortedUsed({
query: {a: 1, c: "c"},
expectedResult:
[{_id: 1, a: 1, b: [1, 2, 3], c: "c"}, {_id: 2, a: [1, 2, 3], b: 2, c: "c"}],
shouldUseAndSorted: true
});
assertAndSortedUsed({
query: {a: 1, b: 2},
expectedResult:
[{_id: 1, a: 1, b: [1, 2, 3], c: "c"}, {_id: 2, a: [1, 2, 3], b: 2, c: "c"}],
shouldUseAndSorted: true
});
assertAndSortedUsed({
query: {a: 2, c: "c"},
expectedResult:
[{_id: 2, a: [1, 2, 3], b: 2, c: "c"}, {_id: 3, a: 2, b: "b", c: ["a", "b", "c"]}],
shouldUseAndSorted: true
});
assertAndSortedUsed({
query: {a: 2, c: {"$size": 3}},
expectedResult: [{_id: 3, a: 2, b: "b", c: ["a", "b", "c"]}],
shouldUseAndSorted: false
});
}
runAndSortedTests();
// Re-run the tests now with 'internalQueryExecYieldIterations' set to '1' such that yield happens
// after each document is returned.
assert.commandWorked(db.adminCommand({setParameter: 1, internalQueryExecYieldIterations: 1}));
runAndSortedTests();
MongoRunner.stopMongod(conn);
})();
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