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
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
|
// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include "node.h"
#include "querybuilder.h"
#include "termnodes.h"
#include <vespa/searchlib/parsequery/stackdumpiterator.h>
#include <vespa/searchlib/common/geo_location_parser.h>
#include <vespa/vespalib/util/stringfmt.h>
#include <vespa/vespalib/util/issue.h>
#include <charconv>
namespace search::query {
class StackDumpQueryCreatorHelper {
public:
static void populateMultiTerm(SimpleQueryStackDumpIterator &queryStack, QueryBuilderBase & builder, MultiTerm & mt);
static void reportError(const SimpleQueryStackDumpIterator &queryStack, const QueryBuilderBase & builder);
};
/**
* Creates a query tree from a stack dump.
*/
template <class NodeTypes>
class StackDumpQueryCreator {
public:
static Node::UP create(search::SimpleQueryStackDumpIterator &queryStack)
{
QueryBuilder<NodeTypes> builder;
// Make sure that the life time of what pureTermView refers to exceeds that of pureTermView.
// Especially make sure that do not create any stack local objects like vespalib::string
// with smaller scope, that you refer with pureTermView.
vespalib::stringref pureTermView;
while (!builder.hasError() && queryStack.next()) {
Term *t = createQueryTerm(queryStack, builder, pureTermView);
if (!builder.hasError() && t) {
if (queryStack.hasNoRankFlag()) {
t->setRanked(false);
}
if (queryStack.hasNoPositionDataFlag()) {
t->setPositionData(false);
}
}
}
if (builder.hasError()) {
StackDumpQueryCreatorHelper::reportError(queryStack, builder);
}
return builder.build();
}
private:
static void populateMultiTerm(search::SimpleQueryStackDumpIterator &queryStack, QueryBuilderBase & builder, MultiTerm & mt) {
StackDumpQueryCreatorHelper::populateMultiTerm(queryStack, builder, mt);
}
static Term *
createQueryTerm(search::SimpleQueryStackDumpIterator &queryStack, QueryBuilder<NodeTypes> & builder, vespalib::stringref & pureTermView) {
uint32_t arity = queryStack.getArity();
ParseItem::ItemType type = queryStack.getType();
Node::UP node;
Term *t = nullptr;
if (type == ParseItem::ITEM_AND) {
builder.addAnd(arity);
} else if (type == ParseItem::ITEM_RANK) {
builder.addRank(arity);
} else if (type == ParseItem::ITEM_OR) {
builder.addOr(arity);
} else if (type == ParseItem::ITEM_WORD_ALTERNATIVES) {
vespalib::stringref view = queryStack.getIndexName();
int32_t id = queryStack.getUniqueId();
Weight weight = queryStack.GetWeight();
builder.addEquiv(arity, id, weight);
pureTermView = view;
} else if (type == ParseItem::ITEM_WEAK_AND) {
vespalib::stringref view = queryStack.getIndexName();
uint32_t targetNumHits = queryStack.getTargetHits();
builder.addWeakAnd(arity, targetNumHits, view);
pureTermView = view;
} else if (type == ParseItem::ITEM_EQUIV) {
int32_t id = queryStack.getUniqueId();
Weight weight = queryStack.GetWeight();
builder.addEquiv(arity, id, weight);
} else if (type == ParseItem::ITEM_NEAR) {
uint32_t nearDistance = queryStack.getNearDistance();
builder.addNear(arity, nearDistance);
} else if (type == ParseItem::ITEM_ONEAR) {
uint32_t nearDistance = queryStack.getNearDistance();
builder.addONear(arity, nearDistance);
} else if (type == ParseItem::ITEM_PHRASE) {
vespalib::stringref view = queryStack.getIndexName();
int32_t id = queryStack.getUniqueId();
Weight weight = queryStack.GetWeight();
t = &builder.addPhrase(arity, view, id, weight);
pureTermView = view;
} else if (type == ParseItem::ITEM_SAME_ELEMENT) {
vespalib::stringref view = queryStack.getIndexName();
int32_t id = queryStack.getUniqueId();
Weight weight = queryStack.GetWeight();
builder.addSameElement(arity, view, id, weight);
pureTermView = view;
} else if (type == ParseItem::ITEM_WEIGHTED_SET) {
vespalib::stringref view = queryStack.getIndexName();
int32_t id = queryStack.getUniqueId();
Weight weight = queryStack.GetWeight();
auto & ws = builder.addWeightedSetTerm(arity, view, id, weight);
pureTermView = vespalib::stringref();
populateMultiTerm(queryStack, builder, ws);
t = &ws;
} else if (type == ParseItem::ITEM_DOT_PRODUCT) {
vespalib::stringref view = queryStack.getIndexName();
int32_t id = queryStack.getUniqueId();
Weight weight = queryStack.GetWeight();
auto & dotProduct = builder.addDotProduct(arity, view, id, weight);
pureTermView = vespalib::stringref();
populateMultiTerm(queryStack, builder, dotProduct);
t = &dotProduct;
} else if (type == ParseItem::ITEM_WAND) {
vespalib::stringref view = queryStack.getIndexName();
int32_t id = queryStack.getUniqueId();
Weight weight = queryStack.GetWeight();
uint32_t targetNumHits = queryStack.getTargetHits();
double scoreThreshold = queryStack.getScoreThreshold();
double thresholdBoostFactor = queryStack.getThresholdBoostFactor();
auto & wand = builder.addWandTerm(arity, view, id, weight, targetNumHits, scoreThreshold, thresholdBoostFactor);
pureTermView = vespalib::stringref();
populateMultiTerm(queryStack, builder, wand);
t = & wand;
} else if (type == ParseItem::ITEM_NOT) {
builder.addAndNot(arity);
} else if (type == ParseItem::ITEM_NEAREST_NEIGHBOR) {
vespalib::stringref query_tensor_name = queryStack.getTerm();
vespalib::stringref field_name = queryStack.getIndexName();
uint32_t target_num_hits = queryStack.getTargetHits();
int32_t id = queryStack.getUniqueId();
Weight weight = queryStack.GetWeight();
bool allow_approximate = queryStack.getAllowApproximate();
uint32_t explore_additional_hits = queryStack.getExploreAdditionalHits();
double distance_threshold = queryStack.getDistanceThreshold();
builder.add_nearest_neighbor_term(query_tensor_name, field_name, id, weight,
target_num_hits, allow_approximate, explore_additional_hits,
distance_threshold);
} else if (type == ParseItem::ITEM_TRUE) {
builder.add_true_node();
} else if (type == ParseItem::ITEM_FALSE) {
builder.add_false_node();
} else {
vespalib::stringref term = queryStack.getTerm();
vespalib::stringref view = queryStack.getIndexName();
int32_t id = queryStack.getUniqueId();
Weight weight = queryStack.GetWeight();
if (type == ParseItem::ITEM_TERM) {
t = &builder.addStringTerm(term, view, id, weight);
} else if (type == ParseItem::ITEM_PURE_WEIGHTED_STRING) {
t = &builder.addStringTerm(term, pureTermView, id, weight);
} else if (type == ParseItem::ITEM_PURE_WEIGHTED_LONG) {
char buf[24];
auto res = std::to_chars(buf, buf + sizeof(buf), queryStack.getIntergerTerm(), 10);
t = &builder.addNumberTerm(vespalib::stringref(buf, res.ptr - buf), pureTermView, id, weight);
} else if (type == ParseItem::ITEM_PREFIXTERM) {
t = &builder.addPrefixTerm(term, view, id, weight);
} else if (type == ParseItem::ITEM_SUBSTRINGTERM) {
t = &builder.addSubstringTerm(term, view, id, weight);
} else if (type == ParseItem::ITEM_EXACTSTRINGTERM) {
t = &builder.addStringTerm(term, view, id, weight);
} else if (type == ParseItem::ITEM_SUFFIXTERM) {
t = &builder.addSuffixTerm(term, view, id, weight);
} else if (type == ParseItem::ITEM_GEO_LOCATION_TERM) {
search::common::GeoLocationParser parser;
if (! parser.parseNoField(term)) {
vespalib::Issue::report("query builder: invalid geo location term '%s'", term.data());
}
Location loc(parser.getGeoLocation());
t = &builder.addLocationTerm(loc, view, id, weight);
} else if (type == ParseItem::ITEM_NUMTERM) {
if (Term::isPossibleRangeTerm(term)) {
Range range(term);
t = &builder.addRangeTerm(range, view, id, weight);
} else {
t = &builder.addNumberTerm(term, view, id, weight);
}
} else if (type == ParseItem::ITEM_PREDICATE_QUERY) {
t = &builder.addPredicateQuery(queryStack.getPredicateQueryTerm(), view, id, weight);
} else if (type == ParseItem::ITEM_REGEXP) {
t = &builder.addRegExpTerm(term, view, id, weight);
} else if (type == ParseItem::ITEM_FUZZY) {
uint32_t maxEditDistance = queryStack.getFuzzyMaxEditDistance();
uint32_t prefixLength = queryStack.getFuzzyPrefixLength();
t = &builder.addFuzzyTerm(term, view, id, weight, maxEditDistance, prefixLength);
} else {
vespalib::Issue::report("query builder: Unable to create query tree from stack dump. node type = %d.", type);
}
}
return t;
}
};
}
|
