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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "blueprintbuilder.h"
#include "querynodes.h"
#include "same_element_builder.h"
#include <vespa/searchcorespi/index/indexsearchable.h>
#include <vespa/searchlib/query/tree/customtypevisitor.h>
#include <vespa/searchlib/queryeval/leaf_blueprints.h>
#include <vespa/searchlib/queryeval/intermediate_blueprints.h>
#include <vespa/searchlib/queryeval/equiv_blueprint.h>
#include <vespa/searchlib/queryeval/get_weight_from_node.h>
#include <vespa/vespalib/util/issue.h>
using namespace search::queryeval;
using search::query::Node;
namespace proton::matching {
namespace {
struct Mixer {
std::unique_ptr<OrBlueprint> attributes;
Mixer() : attributes() {}
void addAttribute(Blueprint::UP attr) {
if ( ! attributes) {
attributes = std::make_unique<OrBlueprint>();
}
attributes->addChild(std::move(attr));
}
Blueprint::UP mix(Blueprint::UP indexes) {
if ( ! attributes) {
if ( ! indexes) {
return std::make_unique<EmptyBlueprint>();
}
return indexes;
}
if ( ! indexes) {
if (attributes->childCnt() == 1) {
return attributes->removeChild(0);
} else {
return std::move(attributes);
}
}
attributes->addChild(std::move(indexes));
return std::move(attributes);
}
};
/**
* requires that match data space has been reserved
*/
class BlueprintBuilderVisitor :
public search::query::CustomTypeVisitor<ProtonNodeTypes>
{
private:
const IRequestContext & _requestContext;
ISearchContext &_context;
Blueprint::UP _result;
void buildChildren(IntermediateBlueprint &parent, const std::vector<Node *> &children);
template <typename NodeType>
void buildIntermediate(IntermediateBlueprint *b, NodeType &n) __attribute__((noinline));
void buildWeakAnd(ProtonWeakAnd &n) {
auto *wand = new WeakAndBlueprint(n.getTargetNumHits());
Blueprint::UP result(wand);
for (auto node : n.getChildren()) {
uint32_t weight = getWeightFromNode(*node).percent();
wand->addTerm(build(_requestContext, *node, _context), weight);
}
_result = std::move(result);
}
void buildEquiv(ProtonEquiv &n) {
double eqw = n.getWeight().percent();
FieldSpecBaseList specs;
specs.reserve(n.numFields());
for (size_t i = 0; i < n.numFields(); ++i) {
specs.add(n.field(i).fieldSpec());
}
auto *eq = new EquivBlueprint(std::move(specs), n.children_mdl);
_result.reset(eq);
for (auto node : n.getChildren()) {
double w = getWeightFromNode(*node).percent();
eq->addTerm(build(_requestContext, *node, _context), w / eqw);
}
_result->setDocIdLimit(_context.getDocIdLimit());
n.setDocumentFrequency(_result->getState().estimate().estHits, _context.getDocIdLimit());
}
void buildSameElement(ProtonSameElement &n) {
if (n.numFields() == 1) {
SameElementBuilder builder(_requestContext, _context, n.field(0).fieldSpec(), n.is_expensive());
for (Node *node: n.getChildren()) {
builder.add_child(*node);
}
_result = builder.build();
} else {
vespalib::Issue::report("SameElement operator searches in unexpected number of fields. Expected 1 but was %zu", n.numFields());
_result = std::make_unique<EmptyBlueprint>();
}
}
template <typename NodeType>
void buildTerm(NodeType &n) {
FieldSpecList indexFields;
Mixer mixer;
for (size_t i = 0; i < n.numFields(); ++i) {
const ProtonTermData::FieldEntry &field = n.field(i);
assert(field.getFieldId() != search::fef::IllegalFieldId);
assert(field.getHandle() != search::fef::IllegalHandle);
if (field.attribute_field) {
mixer.addAttribute(_context.getAttributes().createBlueprint(_requestContext, field.fieldSpec(), n));
} else {
indexFields.add(field.fieldSpec());
}
}
Blueprint::UP indexBlueprint;
if (!indexFields.empty()) {
indexBlueprint = _context.getIndexes().createBlueprint(_requestContext, indexFields, n);
}
_result = mixer.mix(std::move(indexBlueprint));
_result->setDocIdLimit(_context.getDocIdLimit());
n.setDocumentFrequency(_result->getState().estimate().estHits, _context.getDocIdLimit());
}
protected:
void visit(ProtonAnd &n) override { buildIntermediate(new AndBlueprint(), n); }
void visit(ProtonAndNot &n) override { buildIntermediate(new AndNotBlueprint(), n); }
void visit(ProtonOr &n) override { buildIntermediate(new OrBlueprint(), n); }
void visit(ProtonWeakAnd &n) override { buildWeakAnd(n); }
void visit(ProtonEquiv &n) override { buildEquiv(n); }
void visit(ProtonRank &n) override { buildIntermediate(new RankBlueprint(), n); }
void visit(ProtonNear &n) override { buildIntermediate(new NearBlueprint(n.getDistance()), n); }
void visit(ProtonONear &n) override { buildIntermediate(new ONearBlueprint(n.getDistance()), n); }
void visit(ProtonSameElement &n) override { buildSameElement(n); }
void visit(ProtonWeightedSetTerm &n) override { buildTerm(n); }
void visit(ProtonDotProduct &n) override { buildTerm(n); }
void visit(ProtonWandTerm &n) override { buildTerm(n); }
void visit(ProtonPhrase &n) override { buildTerm(n); }
void visit(ProtonNumberTerm &n) override { buildTerm(n); }
void visit(ProtonLocationTerm &n) override { buildTerm(n); }
void visit(ProtonPrefixTerm &n) override { buildTerm(n); }
void visit(ProtonRangeTerm &n) override { buildTerm(n); }
void visit(ProtonStringTerm &n) override { buildTerm(n); }
void visit(ProtonSubstringTerm &n) override { buildTerm(n); }
void visit(ProtonSuffixTerm &n) override { buildTerm(n); }
void visit(ProtonPredicateQuery &n) override { buildTerm(n); }
void visit(ProtonRegExpTerm &n) override { buildTerm(n); }
void visit(ProtonNearestNeighborTerm &n) override { buildTerm(n); }
void visit(ProtonTrue &) override {
_result = std::make_unique<AlwaysTrueBlueprint>();
}
void visit(ProtonFalse &) override {
_result = std::make_unique<EmptyBlueprint>();
}
void visit(ProtonFuzzyTerm &n) override { buildTerm(n); }
void visit(ProtonInTerm& n) override { buildTerm(n); }
public:
BlueprintBuilderVisitor(const IRequestContext & requestContext, ISearchContext &context) :
_requestContext(requestContext),
_context(context),
_result()
{ }
Blueprint::UP build() {
assert(_result);
return std::move(_result);
}
static Blueprint::UP build(const IRequestContext & requestContext, Node &node, ISearchContext &context) {
BlueprintBuilderVisitor visitor(requestContext, context);
node.accept(visitor);
Blueprint::UP result = visitor.build();
return result;
}
};
void
BlueprintBuilderVisitor::buildChildren(IntermediateBlueprint &parent, const std::vector<Node *> &children)
{
parent.reserve(children.size());
for (auto child : children) {
parent.addChild(build(_requestContext, *child, _context));
}
}
template <typename NodeType>
void
BlueprintBuilderVisitor::buildIntermediate(IntermediateBlueprint *b, NodeType &n) {
std::unique_ptr<IntermediateBlueprint> blueprint(b);
buildChildren(*blueprint, n.getChildren());
_result = std::move(blueprint);
}
IntermediateBlueprint *
asRankOrAndNot(Blueprint * blueprint) {
return ((blueprint->isAndNot() || blueprint->isRank()))
? blueprint->asIntermediate()
: nullptr;
}
IntermediateBlueprint *
lastConsequtiveRankOrAndNot(Blueprint * blueprint) {
IntermediateBlueprint * prev = nullptr;
IntermediateBlueprint * curr = asRankOrAndNot(blueprint);
while (curr != nullptr) {
prev = curr;
curr = asRankOrAndNot(&curr->getChild(0));
}
return prev;
}
} // namespace proton::matching::<unnamed>
Blueprint::UP
BlueprintBuilder::build(const IRequestContext & requestContext,
Node &node, Blueprint::UP whiteList, ISearchContext &context)
{
auto blueprint = BlueprintBuilderVisitor::build(requestContext, node, context);
if (whiteList) {
auto andBlueprint = std::make_unique<AndBlueprint>();
IntermediateBlueprint * rankOrAndNot = lastConsequtiveRankOrAndNot(blueprint.get());
if (rankOrAndNot != nullptr) {
(*andBlueprint)
.addChild(rankOrAndNot->removeChild(0))
.addChild(std::move(whiteList));
rankOrAndNot->insertChild(0, std::move(andBlueprint));
} else {
(*andBlueprint)
.addChild(std::move(blueprint))
.addChild(std::move(whiteList));
blueprint = std::move(andBlueprint);
}
}
blueprint->setDocIdLimit(context.getDocIdLimit());
return blueprint;
}
}
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