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
|
/**
* Copyright (C) 2021-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* 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
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* 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 Server Side 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/db/timeseries/timeseries_collmod.h"
#include "mongo/db/catalog/coll_mod.h"
#include "mongo/db/timeseries/catalog_helper.h"
#include "mongo/db/timeseries/timeseries_index_schema_conversion_functions.h"
#include "mongo/logv2/log.h"
#include "mongo/logv2/redaction.h"
#define MONGO_LOGV2_DEFAULT_COMPONENT ::mongo::logv2::LogComponent::kStorage
namespace mongo {
namespace timeseries {
std::unique_ptr<CollMod> makeTimeseriesBucketsCollModCommand(OperationContext* opCtx,
const CollMod& origCmd) {
const auto& origNs = origCmd.getNamespace();
auto isCommandOnTimeseriesBucketNamespace =
origCmd.getIsTimeseriesNamespace() && *origCmd.getIsTimeseriesNamespace();
auto timeseriesOptions =
timeseries::getTimeseriesOptions(opCtx, origNs, !isCommandOnTimeseriesBucketNamespace);
// Return early with null if we are not working with a time-series collection.
if (!timeseriesOptions) {
return {};
}
auto index = origCmd.getIndex();
if (index && index->getKeyPattern()) {
auto bucketsIndexSpecWithStatus = timeseries::createBucketsIndexSpecFromTimeseriesIndexSpec(
*timeseriesOptions, *index->getKeyPattern());
uassert(ErrorCodes::IndexNotFound,
str::stream() << bucketsIndexSpecWithStatus.getStatus().toString()
<< " Command request: " << redact(origCmd.toBSON({})),
bucketsIndexSpecWithStatus.isOK());
index->setKeyPattern(std::move(bucketsIndexSpecWithStatus.getValue()));
}
auto ns =
isCommandOnTimeseriesBucketNamespace ? origNs : origNs.makeTimeseriesBucketsNamespace();
CollModRequest request;
request.setIndex(index);
request.setValidator(origCmd.getValidator());
request.setValidationLevel(origCmd.getValidationLevel());
request.setValidationAction(origCmd.getValidationAction());
request.setViewOn(origCmd.getViewOn());
request.setPipeline(origCmd.getPipeline());
request.setRecordPreImages(origCmd.getRecordPreImages());
request.setChangeStreamPreAndPostImages(origCmd.getChangeStreamPreAndPostImages());
request.setExpireAfterSeconds(origCmd.getExpireAfterSeconds());
request.setTimeseries(origCmd.getTimeseries());
request.setDryRun(origCmd.getDryRun());
auto cmd = std::make_unique<CollMod>(ns);
cmd->setCollModRequest(request);
return cmd;
}
std::unique_ptr<CollMod> makeTimeseriesViewCollModCommand(OperationContext* opCtx,
const CollMod& origCmd) {
const auto& ns = origCmd.getNamespace();
auto isCommandOnTimeseriesBucketNamespace =
origCmd.getIsTimeseriesNamespace() && *origCmd.getIsTimeseriesNamespace();
auto timeseriesOptions =
timeseries::getTimeseriesOptions(opCtx, ns, !isCommandOnTimeseriesBucketNamespace);
// Return early with null if we are not working with a time-series collection.
if (!timeseriesOptions) {
return {};
}
auto& tsMod = origCmd.getTimeseries();
if (tsMod) {
auto res = timeseries::applyTimeseriesOptionsModifications(*timeseriesOptions, *tsMod);
if (res.isOK()) {
auto& [newOptions, changed] = res.getValue();
if (changed) {
auto cmd = std::make_unique<CollMod>(ns);
constexpr bool asArray = false;
std::vector<BSONObj> pipeline = {
timeseries::generateViewPipeline(newOptions, asArray)};
CollModRequest viewRequest;
viewRequest.setPipeline(std::move(pipeline));
cmd->setCollModRequest(viewRequest);
return cmd;
}
}
}
return {};
}
Status processCollModCommandWithTimeSeriesTranslation(OperationContext* opCtx,
const NamespaceString& nss,
const CollMod& cmd,
bool performViewChange,
BSONObjBuilder* result) {
const auto* mainCmd = &cmd;
// If the target namespace refers to a time-series collection, we will redirect the
// collection modification request to the underlying bucket collection.
// Aliasing collMod on a time-series collection in this manner has a few advantages:
// - It supports modifying the expireAfterSeconds setting (which is also a collection
// creation option).
// - It avoids any accidental changes to critical view-specific properties of the
// time-series collection, which are important for maintaining the view-bucket
// relationship.
//
// 'timeseriesBucketsCmd' is null if the request namespace does not refer to a time-series
// collection. Otherwise, transforms the user time-series collMod request to one on the
// underlying bucket collection.
auto timeseriesBucketsCmd = makeTimeseriesBucketsCollModCommand(opCtx, cmd);
if (timeseriesBucketsCmd) {
// We additionally create a special, limited collMod command for the view definition
// itself if the pipeline needs to be updated to reflect changed timeseries options.
// This operation is completed first. In the case that we get a partial update where
// only one of the two collMod operations fully completes (e.g. replication rollback),
// having the view pipeline update without updating the timeseries options on the
// buckets collection will result in sub-optimal performance, but correct behavior.
// If the timeseries options were updated without updating the view pipeline, we could
// end up with incorrect query behavior (namely data missing from some queries).
auto timeseriesViewCmd = makeTimeseriesViewCollModCommand(opCtx, cmd);
if (timeseriesViewCmd && performViewChange) {
auto status = processCollModCommand(opCtx, nss, *timeseriesViewCmd, result);
if (!status.isOK()) {
return status;
}
}
mainCmd = timeseriesBucketsCmd.get();
}
return processCollModCommand(opCtx, mainCmd->getNamespace(), *mainCmd, result);
}
} // namespace timeseries
} // namespace mongo
|
