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
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
|
/**
* Copyright (C) 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/ops/parsed_update.h"
#include "mongo/db/matcher/extensions_callback_real.h"
#include "mongo/db/ops/update_request.h"
#include "mongo/db/query/canonical_query.h"
#include "mongo/db/query/collation/collator_factory_interface.h"
#include "mongo/db/query/query_planner_common.h"
#include "mongo/db/server_options.h"
namespace mongo {
ParsedUpdate::ParsedUpdate(OperationContext* txn, const UpdateRequest* request)
: _txn(txn), _request(request), _driver(UpdateDriver::Options()), _canonicalQuery() {}
Status ParsedUpdate::parseRequest() {
// It is invalid to request that the UpdateStage return the prior or newly-updated version
// of a document during a multi-update.
invariant(!(_request->shouldReturnAnyDocs() && _request->isMulti()));
// It is invalid to request that a ProjectionStage be applied to the UpdateStage if the
// UpdateStage would not return any document.
invariant(_request->getProj().isEmpty() || _request->shouldReturnAnyDocs());
if (!_request->getCollation().isEmpty()) {
if (serverGlobalParams.featureCompatibility.version.load() ==
ServerGlobalParams::FeatureCompatibility::Version::k32) {
return Status(ErrorCodes::InvalidOptions,
"The featureCompatibilityVersion must be 3.4 to use collation. See "
"http://dochub.mongodb.org/core/3.4-feature-compatibility.");
}
auto collator = CollatorFactoryInterface::get(_txn->getServiceContext())
->makeFromBSON(_request->getCollation());
if (!collator.isOK()) {
return collator.getStatus();
}
_collator = std::move(collator.getValue());
}
// We parse the update portion before the query portion because the dispostion of the update
// may determine whether or not we need to produce a CanonicalQuery at all. For example, if
// the update involves the positional-dollar operator, we must have a CanonicalQuery even if
// it isn't required for query execution.
Status status = parseUpdate();
if (!status.isOK())
return status;
status = parseQuery();
if (!status.isOK())
return status;
return Status::OK();
}
Status ParsedUpdate::parseQuery() {
dassert(!_canonicalQuery.get());
if (!_driver.needMatchDetails() && CanonicalQuery::isSimpleIdQuery(_request->getQuery())) {
return Status::OK();
}
return parseQueryToCQ();
}
Status ParsedUpdate::parseQueryToCQ() {
dassert(!_canonicalQuery.get());
const ExtensionsCallbackReal extensionsCallback(_txn, &_request->getNamespaceString());
// The projection needs to be applied after the update operation, so we do not specify a
// projection during canonicalization.
auto qr = stdx::make_unique<QueryRequest>(_request->getNamespaceString());
qr->setFilter(_request->getQuery());
qr->setSort(_request->getSort());
qr->setCollation(_request->getCollation());
qr->setExplain(_request->isExplain());
// Limit should only used for the findAndModify command when a sort is specified. If a sort
// is requested, we want to use a top-k sort for efficiency reasons, so should pass the
// limit through. Generally, a update stage expects to be able to skip documents that were
// deleted/modified under it, but a limit could inhibit that and give an EOF when the update
// has not actually updated a document. This behavior is fine for findAndModify, but should
// not apply to update in general.
if (!_request->isMulti() && !_request->getSort().isEmpty()) {
qr->setLimit(1);
}
auto statusWithCQ = CanonicalQuery::canonicalize(_txn, std::move(qr), extensionsCallback);
if (statusWithCQ.isOK()) {
_canonicalQuery = std::move(statusWithCQ.getValue());
}
return statusWithCQ.getStatus();
}
Status ParsedUpdate::parseUpdate() {
const NamespaceString& ns(_request->getNamespaceString());
// Should the modifiers validate their embedded docs via okForStorage
// Only user updates should be checked. Any system or replication stuff should pass through.
// Config db docs shouldn't get checked for valid field names since the shard key can have
// a dot (".") in it.
const bool shouldValidate =
!(!_txn->writesAreReplicated() || ns.isConfigDB() || _request->isFromMigration());
_driver.setLogOp(true);
_driver.setModOptions(
ModifierInterface::Options(!_txn->writesAreReplicated(), shouldValidate, _collator.get()));
return _driver.parse(_request->getUpdates(), _request->isMulti());
}
PlanExecutor::YieldPolicy ParsedUpdate::yieldPolicy() const {
if (_request->isGod()) {
return PlanExecutor::YIELD_MANUAL;
}
if (_request->getYieldPolicy() == PlanExecutor::YIELD_AUTO && isIsolated()) {
return PlanExecutor::WRITE_CONFLICT_RETRY_ONLY; // Don't yield locks.
}
return _request->getYieldPolicy();
}
bool ParsedUpdate::isIsolated() const {
return _canonicalQuery.get() ? _canonicalQuery->isIsolated()
: QueryRequest::isQueryIsolated(_request->getQuery());
}
bool ParsedUpdate::hasParsedQuery() const {
return _canonicalQuery.get() != NULL;
}
std::unique_ptr<CanonicalQuery> ParsedUpdate::releaseParsedQuery() {
invariant(_canonicalQuery.get() != NULL);
return std::move(_canonicalQuery);
}
const UpdateRequest* ParsedUpdate::getRequest() const {
return _request;
}
UpdateDriver* ParsedUpdate::getDriver() {
return &_driver;
}
void ParsedUpdate::setCollator(std::unique_ptr<CollatorInterface> collator) {
_collator = std::move(collator);
_driver.setCollator(_collator.get());
}
} // namespace mongo
|