summaryrefslogtreecommitdiff
path: root/jstests/core/arrayfind8.js
blob: 87a3a8d701a5051e4cc65998307568758debd062 (plain)
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
137
138
139
140
141
142
143
144
/**
 * Matching behavior for $elemMatch applied to a top level element.
 * Includes tests for bugs described in SERVER-1264 and SERVER-4180.
 */
(function() {
"use strict";

const coll = db.jstests_arrayfind8;
coll.drop();

// May be changed during the test.
let currentIndexSpec = {a: 1};

/**
 * Check that the query results match the documents in the 'expected' array.
 */
function assertResults(expected, query, context) {
    assert.eq(expected.length, coll.count(query), 'unexpected count in ' + context);
    const results = coll.find(query).toArray();
    const resultsAOnly = results.map((r) => r.a);
    assert.sameMembers(resultsAOnly, expected);
}

/**
 * Check matching for different query types.
 * @param bothMatch - document matched by both standardQuery and elemMatchQuery
 * @param elemMatch - document matched by elemMatchQuery but not standardQuery
 * @param notElemMatch - document matched by standardQuery but not elemMatchQuery
 */
function checkMatch(bothMatch, elemMatch, nonElemMatch, standardQuery, elemMatchQuery, context) {
    function mayPush(arr, elt) {
        if (elt) {
            arr.push(elt);
        }
    }

    let expectedStandardQueryResults = [];
    mayPush(expectedStandardQueryResults, bothMatch);
    mayPush(expectedStandardQueryResults, nonElemMatch);
    assertResults(expectedStandardQueryResults, standardQuery, context + ' standard query');

    let expectedElemMatchQueryResults = [];
    mayPush(expectedElemMatchQueryResults, bothMatch);
    mayPush(expectedElemMatchQueryResults, elemMatch);
    assertResults(expectedElemMatchQueryResults, elemMatchQuery, context + ' elemMatch query');
}

/**
 * Check matching and for different query types.
 * @param subQuery - part of a query, to be provided as is for a standard query and within a
 *     $elemMatch clause for a $elemMatch query
 * @param bothMatch - document matched by both standardQuery and elemMatchQuery
 * @param elemMatch - document matched by elemMatchQuery but not standardQuery
 * @param notElemMatch - document matched by standardQuery but not elemMatchQuery
 * @param additionalConstraints - additional query parameters not generated from @param subQuery
 */
function checkQuery(subQuery, bothMatch, elemMatch, nonElemMatch, additionalConstraints) {
    coll.drop();
    additionalConstraints = additionalConstraints || {};

    // Construct standard and elemMatch queries from subQuery.
    const firstSubQueryKey = Object.keySet(subQuery)[0];
    let standardQuery = null;
    if (firstSubQueryKey[0] == '$') {
        standardQuery = {$and: [{a: subQuery}, additionalConstraints]};
    } else {
        // If the subQuery contains a field rather than operators, append to the 'a' field.
        let modifiedSubQuery = {};
        modifiedSubQuery['a.' + firstSubQueryKey] = subQuery[firstSubQueryKey];
        standardQuery = {$and: [modifiedSubQuery, additionalConstraints]};
    }
    const elemMatchQuery = {$and: [{a: {$elemMatch: subQuery}}, additionalConstraints]};

    function insertValueIfNotNull(val) {
        if (val) {
            assert.commandWorked(coll.insert({a: val}));
        }
    }

    // Save all documents and check matching without indexes.
    insertValueIfNotNull(bothMatch);
    insertValueIfNotNull(elemMatch);
    insertValueIfNotNull(nonElemMatch);

    checkMatch(bothMatch, elemMatch, nonElemMatch, standardQuery, elemMatchQuery, 'unindexed');

    // Check matching and index bounds for a single key index.

    assert.eq(coll.drop(), true);
    insertValueIfNotNull(bothMatch);
    insertValueIfNotNull(elemMatch);
    // The nonElemMatch document is not tested here, as it will often make the index multikey.
    assert.commandWorked(coll.createIndex(currentIndexSpec));
    checkMatch(bothMatch, elemMatch, null, standardQuery, elemMatchQuery, 'single key index');

    // Check matching and index bounds for a multikey index.

    // Now the nonElemMatch document is tested.
    insertValueIfNotNull(nonElemMatch);
    // Force the index to be multikey.
    assert.commandWorked(coll.insert({a: [-1, -2]}));
    assert.commandWorked(coll.insert({a: {b: [-1, -2]}}));
    checkMatch(bothMatch, elemMatch, nonElemMatch, standardQuery, elemMatchQuery, 'multikey index');
}

// Basic test.
checkQuery({$gt: 4}, [5]);

// Multiple constraints within a $elemMatch clause.
checkQuery({$gt: 4, $lt: 6}, [5], null, [3, 7]);
checkQuery({$gt: 4, $not: {$gte: 6}}, [5]);
checkQuery({$gt: 4, $not: {$ne: 6}}, [6]);
checkQuery({$gte: 5, $lte: 5}, [5], null, [4, 6]);
checkQuery({$in: [4, 6], $gt: 5}, [6], null, [4, 7]);
checkQuery({$regex: '^a'}, ['a']);

// Some constraints within a $elemMatch clause and other constraints outside of it.
checkQuery({$gt: 4}, [5], null, null, {a: {$lt: 6}});
checkQuery({$gte: 5}, [5], null, null, {a: {$lte: 5}});
checkQuery({$in: [4, 6]}, [6], null, null, {a: {$gt: 5}});

// Constraints in different $elemMatch clauses.
checkQuery({$gt: 4}, [5], null, null, {a: {$elemMatch: {$lt: 6}}});
checkQuery({$gt: 4}, [3, 7], null, null, {a: {$elemMatch: {$lt: 6}}});
checkQuery({$gte: 5}, [5], null, null, {a: {$elemMatch: {$lte: 5}}});
checkQuery({$in: [4, 6]}, [6], null, null, {a: {$elemMatch: {$gt: 5}}});

checkQuery({$elemMatch: {$in: [5]}}, null, [[5]], [5], null);

currentIndexSpec = {
    "a.b": 1
};
checkQuery({$elemMatch: {b: {$gte: 1, $lte: 1}}}, null, [[{b: 1}]], [{b: 1}], null);
checkQuery({$elemMatch: {b: {$gte: 1, $lte: 1}}}, null, [[{b: [0, 2]}]], [{b: [0, 2]}], null);

// Constraints for a top level (SERVER-1264 style) $elemMatch nested within a non top level
// $elemMatch.
checkQuery({b: {$elemMatch: {$gte: 1, $lte: 1}}}, [{b: [1]}]);
checkQuery({b: {$elemMatch: {$gte: 1, $lte: 4}}}, [{b: [1]}]);

checkQuery({b: {$elemMatch: {$gte: 1, $lte: 4}}}, [{b: [2]}], null, null, {'a.b': {$in: [2, 5]}});
checkQuery(
    {b: {$elemMatch: {$in: [1, 2]}, $in: [2, 3]}}, [{b: [2]}], null, [{b: [1]}, {b: [3]}], null);
})();