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
|
/**
* Copyright (C) 2016 MongoDB Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the GNU Affero General Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#pragma once
#include <cstddef>
#include <set>
#include <vector>
namespace mongo {
// If non-empty, a vector with size equal to the number of elements in the index key pattern. Each
// element in the vector is an ordered set of positions (starting at 0) into the corresponding
// indexed field that represent what prefixes of the indexed field cause the index to be multikey.
//
// For example, with the index {'a.b': 1, 'a.c': 1} where the paths "a" and "a.b" cause the
// index to be multikey, we'd have a std::vector<std::set<size_t>>{{0U, 1U}, {0U}}.
//
// An empty vector is used to represent that the index doesn't support path-level multikey tracking.
using MultikeyPaths = std::vector<std::set<std::size_t>>;
} // namespace mongo
|
