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
|
/**
* Copyright (c) 2011-2014 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.
*/
#include "mongo/platform/basic.h"
#include "mongo/db/auth/authorization_session.h"
#include "mongo/db/commands.h"
#include "mongo/db/commands/run_aggregate.h"
#include "mongo/db/namespace_string.h"
#include "mongo/db/pipeline/pipeline.h"
#include "mongo/db/server_options.h"
namespace mongo {
namespace {
bool isMergePipeline(const std::vector<BSONObj>& pipeline) {
if (pipeline.empty()) {
return false;
}
return pipeline[0].hasField("$mergeCursors");
}
class PipelineCommand : public Command {
public:
PipelineCommand() : Command("aggregate") {}
void help(std::stringstream& help) const override {
help << "Runs the aggregation command. See http://dochub.mongodb.org/core/aggregation for "
"more details.";
}
bool supportsWriteConcern(const BSONObj& cmd) const override {
return Pipeline::aggSupportsWriteConcern(cmd);
}
bool slaveOk() const override {
return false;
}
bool slaveOverrideOk() const override {
return true;
}
bool supportsReadConcern() const override {
return true;
}
ReadWriteType getReadWriteType() const {
return ReadWriteType::kRead;
}
Status checkAuthForCommand(Client* client,
const std::string& dbname,
const BSONObj& cmdObj) override {
const NamespaceString nss(parseNsCollectionRequired(dbname, cmdObj));
return AuthorizationSession::get(client)->checkAuthForAggregate(nss, cmdObj);
}
bool run(OperationContext* opCtx,
const std::string& dbname,
BSONObj& cmdObj,
std::string& errmsg,
BSONObjBuilder& result) override {
return appendCommandStatus(result,
_runAggCommand(opCtx, dbname, cmdObj, boost::none, &result));
}
Status explain(OperationContext* opCtx,
const std::string& dbname,
const BSONObj& cmdObj,
ExplainOptions::Verbosity verbosity,
BSONObjBuilder* out) const override {
return _runAggCommand(opCtx, dbname, cmdObj, verbosity, out);
}
private:
static Status _runAggCommand(OperationContext* opCtx,
const std::string& dbname,
const BSONObj& cmdObj,
boost::optional<ExplainOptions::Verbosity> verbosity,
BSONObjBuilder* result) {
const NamespaceString nss(parseNsCollectionRequired(dbname, cmdObj));
const auto aggregationRequest =
uassertStatusOK(AggregationRequest::parseFromBSON(nss, cmdObj, verbosity));
// If the featureCompatibilityVersion is 3.2, we disallow collation from the user. However,
// operations should still respect the collection default collation. The mongos attaches the
// collection default collation to the merger pipeline, since the merger may not have the
// collection metadata. So the merger needs to accept a collation, and we rely on the shards
// to reject collations from the user.
uassert(ErrorCodes::InvalidOptions,
"The featureCompatibilityVersion must be 3.4 to use collation. See "
"http://dochub.mongodb.org/core/3.4-feature-compatibility.",
aggregationRequest.getCollation().isEmpty() ||
serverGlobalParams.featureCompatibility.version.load() !=
ServerGlobalParams::FeatureCompatibility::Version::k32 ||
isMergePipeline(aggregationRequest.getPipeline()));
return runAggregate(opCtx, nss, aggregationRequest, cmdObj, *result);
}
} pipelineCmd;
} // namespace
} // namespace mongo
|
