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
|
/**
* Copyright (C) 2023-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/query/query_shape/cmd_with_let_shape.h"
namespace mongo::query_shape {
namespace {
BSONObj extractLetShape(BSONObj letSpec,
const SerializationOptions& opts,
const boost::intrusive_ptr<ExpressionContext>& expCtx) {
if (letSpec.isEmpty()) {
// Fast path for the common case.
return letSpec;
}
BSONObjBuilder bob;
for (BSONElement elem : letSpec) {
auto expr = Expression::parseOperand(expCtx.get(), elem, expCtx->variablesParseState);
auto redactedValue = expr->serialize(opts);
// Note that this will throw on deeply nested let variables.
redactedValue.addToBsonObj(&bob, opts.serializeFieldPathFromString(elem.fieldName()));
}
return bob.obj();
}
auto representativeLetShape(boost::optional<BSONObj> let,
const boost::intrusive_ptr<ExpressionContext>& expCtx) {
return let ? extractLetShape(
*let, SerializationOptions::kRepresentativeQueryShapeSerializeOptions, expCtx)
: BSONObj();
}
} // namespace
LetShapeComponent::LetShapeComponent(boost::optional<BSONObj> let,
const boost::intrusive_ptr<ExpressionContext>& expCtx,
const CmdSpecificShapeComponents& unownedInnerComponents_)
: shapifiedLet(representativeLetShape(let, expCtx)),
hasLet(bool(let)),
unownedInnerComponents(unownedInnerComponents_) {}
void LetShapeComponent::HashValue(absl::HashState state) const {
state = absl::HashState::combine(
std::move(state), hasLet, simpleHash(shapifiedLet), unownedInnerComponents);
}
size_t LetShapeComponent::size() const {
return sizeof(LetShapeComponent) + shapifiedLet.objsize() + unownedInnerComponents.size();
}
void LetShapeComponent::addLetBson(BSONObjBuilder& bob,
const SerializationOptions& opts,
const boost::intrusive_ptr<ExpressionContext>& expCtx) const {
if (hasLet) {
auto shapeToAppend = shapifiedLet;
if (opts != SerializationOptions::kRepresentativeQueryShapeSerializeOptions) {
// We have the representative query cached/stored here, but the caller is asking for a
// different format, so we must re-compute.
shapeToAppend = extractLetShape(shapifiedLet, opts, expCtx);
}
bob.append(FindCommandRequest::kLetFieldName, shapeToAppend);
}
}
void CmdWithLetShape::appendCmdSpecificShapeComponents(BSONObjBuilder& bob,
OperationContext* opCtx,
const SerializationOptions& opts) const {
auto expCtx =
ExpressionContext::makeBlankExpressionContext(opCtx, nssOrUUID, _let.shapifiedLet);
_let.addLetBson(bob, opts, expCtx);
appendLetCmdSpecificShapeComponents(bob, expCtx, opts);
}
CmdWithLetShape::CmdWithLetShape(boost::optional<BSONObj> let,
const boost::intrusive_ptr<ExpressionContext>& expCtx,
const CmdSpecificShapeComponents& unownedInnerComponents,
NamespaceStringOrUUID nssOrUUID,
BSONObj collation)
: Shape(nssOrUUID, collation), _let(let, expCtx, unownedInnerComponents) {}
} // namespace mongo::query_shape
|
