1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
|
/**
* Tests queries that are covered by an index.
*
* This test cannot implicitly shard accessed collections because queries on a sharded collection
* cannot be covered when they aren't on the shard key since the document needs to be fetched in
* order to apply the SHARDING_FILTER stage.
* @tags: [
* assumes_unsharded_collection,
* ]
*/
(function() {
"use strict";
load("jstests/aggregation/extras/utils.js"); // arrayEq
const coll = db.jstests_find_covered_projection;
coll.drop();
assert.commandWorked(coll.insert([
{order: 0, fn: "john", ln: "doe"},
{order: 1, fn: "jack", ln: "doe"},
{order: 2, fn: "john", ln: "smith"},
{order: 3, fn: "jack", ln: "black"},
{order: 4, fn: "bob", ln: "murray"},
{order: 5, fn: "aaa", ln: "bbb", obj: {a: 1, b: "blah"}}
]));
function assertResultsMatch(query, projection, expectedResult) {
assert(arrayEq(coll.find(query, projection).toArray(), expectedResult));
}
// Create an index on one field.
assert.commandWorked(coll.createIndex({ln: 1}));
assertResultsMatch({ln: "doe"}, {ln: 1, _id: 0}, [{ln: "doe"}, {ln: "doe"}]);
// Create a compound index.
assert.commandWorked(coll.dropIndex({ln: 1}));
assert.commandWorked(coll.createIndex({ln: 1, fn: 1}));
assertResultsMatch({ln: "doe"}, {ln: 1, _id: 0}, [{ln: "doe"}, {ln: "doe"}]);
assertResultsMatch(
{ln: "doe"}, {ln: 1, fn: 1, _id: 0}, [{ln: "doe", fn: "jack"}, {ln: "doe", fn: "john"}]);
assertResultsMatch({ln: "doe", fn: "john"}, {ln: 1, fn: 1, _id: 0}, [{ln: "doe", fn: "john"}]);
assertResultsMatch({fn: "john", ln: "doe"}, {fn: 1, ln: 1, _id: 0}, [{ln: "doe", fn: "john"}]);
// Repeat the above test, but with a compound index involving _id.
assert.commandWorked(coll.dropIndex({ln: 1, fn: 1}));
assert.commandWorked(coll.createIndex({_id: 1, ln: 1}));
assertResultsMatch({_id: 123, ln: "doe"}, {_id: 1}, []);
assertResultsMatch({_id: 123, ln: "doe"}, {ln: 1}, []);
assertResultsMatch({ln: "doe", _id: 123}, {ln: 1, _id: 1}, []);
// Create an index on an embedded object.
assert.commandWorked(coll.dropIndex({_id: 1, ln: 1}));
assert.commandWorked(coll.createIndex({obj: 1}));
assertResultsMatch({obj: {a: 1, b: "blah"}}, {obj: 1, _id: 0}, [{obj: {a: 1, b: "blah"}}]);
}());
|
