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
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
|
/**
* Tests that the $lookup stage respects the collation.
*
* The comparison of string values between the 'localField' and 'foreignField' should use the
* collation either explicitly set on the aggregation operation, or the collation inherited from the
* collection the "aggregate" command was performed on.
*/
(function() {
"use strict";
load("jstests/aggregation/extras/utils.js"); // for arrayEq
const caseInsensitive = {collation: {locale: "en_US", strength: 2}};
const withDefaultCollationColl = db.collation_lookup_with_default;
const withoutDefaultCollationColl = db.collation_lookup_without_default;
withDefaultCollationColl.drop();
withoutDefaultCollationColl.drop();
assert.commandWorked(db.createCollection(withDefaultCollationColl.getName(), caseInsensitive));
assert.writeOK(withDefaultCollationColl.insert({_id: "lowercase", str: "abc"}));
assert.writeOK(withoutDefaultCollationColl.insert({_id: "lowercase", str: "abc"}));
assert.writeOK(withoutDefaultCollationColl.insert({_id: "uppercase", str: "ABC"}));
assert.writeOK(withoutDefaultCollationColl.insert({_id: "unmatched", str: "def"}));
// Test that the $lookup stage respects the inherited collation.
let res = withDefaultCollationColl
.aggregate([{
$lookup: {
from: withoutDefaultCollationColl.getName(),
localField: "str",
foreignField: "str",
as: "matched",
},
}])
.toArray();
assert.eq(1, res.length, tojson(res));
let expected = [{_id: "lowercase", str: "abc"}, {_id: "uppercase", str: "ABC"}];
assert(
arrayEq(expected, res[0].matched),
"Expected " + tojson(expected) + " to equal " + tojson(res[0].matched) + " up to ordering");
// Test that the $lookup stage respects the inherited collation when it optimizes with an
// $unwind stage.
res = withDefaultCollationColl
.aggregate([
{
$lookup: {
from: withoutDefaultCollationColl.getName(),
localField: "str",
foreignField: "str",
as: "matched",
},
},
{$unwind: "$matched"},
])
.toArray();
assert.eq(2, res.length, tojson(res));
expected = [
{_id: "lowercase", str: "abc", matched: {_id: "lowercase", str: "abc"}},
{_id: "lowercase", str: "abc", matched: {_id: "uppercase", str: "ABC"}}
];
assert(arrayEq(expected, res),
"Expected " + tojson(expected) + " to equal " + tojson(res) + " up to ordering");
// Test that the $lookup stage respects an explicit collation on the aggregation operation.
res = withoutDefaultCollationColl
.aggregate(
[
{$match: {_id: "lowercase"}},
{
$lookup: {
from: withoutDefaultCollationColl.getName(),
localField: "str",
foreignField: "str",
as: "matched",
},
},
],
caseInsensitive)
.toArray();
assert.eq(1, res.length, tojson(res));
expected = [{_id: "lowercase", str: "abc"}, {_id: "uppercase", str: "ABC"}];
assert(
arrayEq(expected, res[0].matched),
"Expected " + tojson(expected) + " to equal " + tojson(res[0].matched) + " up to ordering");
// Test that the $lookup stage respects an explicit collation on the aggregation operation when
// it optimizes with an $unwind stage.
res = withoutDefaultCollationColl
.aggregate(
[
{$match: {_id: "lowercase"}},
{
$lookup: {
from: withoutDefaultCollationColl.getName(),
localField: "str",
foreignField: "str",
as: "matched",
},
},
{$unwind: "$matched"},
],
caseInsensitive)
.toArray();
assert.eq(2, res.length, tojson(res));
expected = [
{_id: "lowercase", str: "abc", matched: {_id: "lowercase", str: "abc"}},
{_id: "lowercase", str: "abc", matched: {_id: "uppercase", str: "ABC"}}
];
assert(arrayEq(expected, res),
"Expected " + tojson(expected) + " to equal " + tojson(res) + " up to ordering");
// Test that the $lookup stage uses the "simple" collation if a collation isn't set on the
// collection or the aggregation operation.
res = withoutDefaultCollationColl
.aggregate([
{$match: {_id: "lowercase"}},
{
$lookup: {
from: withDefaultCollationColl.getName(),
localField: "str",
foreignField: "str",
as: "matched",
},
},
])
.toArray();
assert.eq([{_id: "lowercase", str: "abc", matched: [{_id: "lowercase", str: "abc"}]}], res);
})();
|
