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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include <vespa/document/select/resultset.h>
#include <vespa/vespalib/stllike/string.h>
#include <memory>
#include <vector>
namespace document {
class DocumentTypeRepo;
class Document;
namespace select { class Node; }
}
namespace search {
class AttributeVector;
class IAttributeManager;
}
namespace search::attribute { class ReadableAttributeVector; }
namespace proton {
class SelectContext;
class SelectPruner;
/**
* Cached selection expression, to avoid pruning expression for each
* new bucket.
*/
class CachedSelect
{
public:
typedef std::shared_ptr<CachedSelect> SP;
class Session {
private:
std::unique_ptr<document::select::Node> _docSelect;
std::unique_ptr<document::select::Node> _preDocOnlySelect;
std::unique_ptr<document::select::Node> _preDocSelect;
public:
Session(std::unique_ptr<document::select::Node> docSelect,
std::unique_ptr<document::select::Node> preDocOnlySelect,
std::unique_ptr<document::select::Node> preDocSelect);
bool contains(const SelectContext &context) const;
bool contains(const document::Document &doc) const;
const document::select::Node &selectNode() const;
};
using AttributeVectors = std::vector<std::shared_ptr<search::attribute::ReadableAttributeVector>>;
private:
// Single value attributes referenced from selection expression
AttributeVectors _attributes;
// Pruned selection expression, specific for a document type
std::unique_ptr<document::select::Node> _docSelect;
uint32_t _fieldNodes;
uint32_t _attrFieldNodes;
uint32_t _svAttrFieldNodes;
bool _allFalse;
bool _allTrue;
bool _allInvalid;
/**
* If expression doesn't reference multi value attributes or
* non-attribute fields then this selection expression can be used
* without retrieving document from document store (must use
* SelectContext class and populate _docId instead).
*/
std::unique_ptr<document::select::Node> _preDocOnlySelect;
/**
* If expression references at least one single value attribute field
* then this selection expression can be used to disqualify a
* document without retrieving it from document store if it evaluates to false.
*/
std::unique_ptr<document::select::Node> _preDocSelect;
void setDocumentSelect(SelectPruner &docsPruner);
void setPreDocumentSelect(const search::IAttributeManager &amgr,
SelectPruner &noDocsPruner);
public:
CachedSelect();
~CachedSelect();
const AttributeVectors &attributes() const { return _attributes; }
uint32_t fieldNodes() const { return _fieldNodes; }
uint32_t attrFieldNodes() const { return _attrFieldNodes; }
uint32_t svAttrFieldNodes() const { return _svAttrFieldNodes; }
bool allFalse() const { return _allFalse; }
bool allTrue() const { return _allTrue; }
bool allInvalid() const { return _allInvalid; }
// Should only be used for unit testing
const std::unique_ptr<document::select::Node> &docSelect() const { return _docSelect; }
const std::unique_ptr<document::select::Node> &preDocOnlySelect() const { return _preDocOnlySelect; }
const std::unique_ptr<document::select::Node> &preDocSelect() const { return _preDocSelect; }
void set(const vespalib::string &selection,
const document::DocumentTypeRepo &repo);
void set(const vespalib::string &selection,
const vespalib::string &docTypeName,
const document::Document &emptyDoc,
const document::DocumentTypeRepo &repo,
const search::IAttributeManager *amgr,
bool hasFields);
std::unique_ptr<Session> createSession() const;
};
}
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