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
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
|
// Compound index covered query tests
// Include helpers for analyzing explain output.
load("jstests/libs/analyze_plan.js");
var coll = db.getCollection("covered_compound_1");
coll.drop();
for (i = 0; i < 100; i++) {
coll.insert({a: i, b: "strvar_" + (i % 13), c: NumberInt(i % 10)});
}
coll.ensureIndex({a: 1, b: -1, c: 1});
// Test equality - all indexed fields queried and projected
var plan = coll.find({a: 10, b: "strvar_10", c: 0}, {a: 1, b: 1, c: 1, _id: 0})
.hint({a: 1, b: -1, c: 1})
.explain("executionStats");
assert(isIndexOnly(plan.queryPlanner.winningPlan),
"compound.1.1 - indexOnly should be true on covered query");
assert.eq(0,
plan.executionStats.totalDocsExamined,
"compound.1.1 - nscannedObjects should be 0 for covered query");
// Test query on subset of fields queried and project all
var plan = coll.find({a: 26, b: "strvar_0"}, {a: 1, b: 1, c: 1, _id: 0})
.hint({a: 1, b: -1, c: 1})
.explain("executionStats");
assert(isIndexOnly(plan.queryPlanner.winningPlan),
"compound.1.2 - indexOnly should be true on covered query");
assert.eq(0,
plan.executionStats.totalDocsExamined,
"compound.1.2 - nscannedObjects should be 0 for covered query");
// Test query on all fields queried and project subset
var plan = coll.find({a: 38, b: "strvar_12", c: 8}, {b: 1, c: 1, _id: 0})
.hint({a: 1, b: -1, c: 1})
.explain("executionStats");
assert(isIndexOnly(plan.queryPlanner.winningPlan),
"compound.1.3 - indexOnly should be true on covered query");
assert.eq(0,
plan.executionStats.totalDocsExamined,
"compound.1.3 - nscannedObjects should be 0 for covered query");
// Test no query
var plan = coll.find({}, {b: 1, c: 1, _id: 0}).hint({a: 1, b: -1, c: 1}).explain("executionStats");
assert(isIndexOnly(plan.queryPlanner.winningPlan),
"compound.1.4 - indexOnly should be true on covered query");
assert.eq(0,
plan.executionStats.totalDocsExamined,
"compound.1.4 - nscannedObjects should be 0 for covered query");
// Test range query
var plan = coll.find({a: {$gt: 25, $lt: 43}}, {b: 1, c: 1, _id: 0})
.hint({a: 1, b: -1, c: 1})
.explain("executionStats");
assert(isIndexOnly(plan.queryPlanner.winningPlan),
"compound.1.5 - indexOnly should be true on covered query");
assert.eq(0,
plan.executionStats.totalDocsExamined,
"compound.1.5 - nscannedObjects should be 0 for covered query");
// Test in query
var plan = coll.find({a: 38, b: "strvar_12", c: {$in: [5, 8]}}, {b: 1, c: 1, _id: 0})
.hint({a: 1, b: -1, c: 1})
.explain("executionStats");
assert(isIndexOnly(plan.queryPlanner.winningPlan),
"compound.1.6 - indexOnly should be true on covered query");
assert.eq(0,
plan.executionStats.totalDocsExamined,
"compound.1.6 - nscannedObjects should be 0 for covered query");
// Test no result
var plan = coll.find({a: 38, b: "strvar_12", c: 55}, {a: 1, b: 1, c: 1, _id: 0})
.hint({a: 1, b: -1, c: 1})
.explain("executionStats");
assert(isIndexOnly(plan.queryPlanner.winningPlan),
"compound.1.7 - indexOnly should be true on covered query");
assert.eq(0,
plan.executionStats.totalDocsExamined,
"compound.1.7 - nscannedObjects should be 0 for covered query");
print('all tests passed');
|
