ClickHouse/src/Dictionaries/DirectDictionary.h
Артем Стрельцов eb5488faeb std::unordered_map -> HashMap
2020-05-05 19:18:21 +03:00

236 lines
7.6 KiB
C++

#pragma once
#include <atomic>
#include <variant>
#include <vector>
#include <Columns/ColumnDecimal.h>
#include <Columns/ColumnString.h>
#include <Common/Arena.h>
#include <Core/Block.h>
#include <ext/range.h>
#include <ext/size.h>
#include <Common/HashTable/HashMap.h>
#include "DictionaryStructure.h"
#include "IDictionary.h"
#include "IDictionarySource.h"
namespace DB
{
using BlockPtr = std::shared_ptr<Block>;
class DirectDictionary final : public IDictionary
{
public:
DirectDictionary(
const std::string & database_,
const std::string & name_,
const DictionaryStructure & dict_struct_,
DictionarySourcePtr source_ptr_,
const DictionaryLifetime dict_lifetime_,
BlockPtr saved_block_ = nullptr);
const std::string & getDatabase() const override { return database; }
const std::string & getName() const override { return name; }
const std::string & getFullName() const override { return full_name; }
std::string getTypeName() const override { return "Direct"; }
size_t getBytesAllocated() const override { return bytes_allocated; }
size_t getQueryCount() const override { return query_count.load(std::memory_order_relaxed); }
double getHitRate() const override { return 1.0; }
size_t getElementCount() const override { return element_count; }
double getLoadFactor() const override { return static_cast<double>(element_count) / bucket_count; }
std::shared_ptr<const IExternalLoadable> clone() const override
{
return std::make_shared<DirectDictionary>(database, name, dict_struct, source_ptr->clone(), dict_lifetime, saved_block);
}
const IDictionarySource * getSource() const override { return source_ptr.get(); }
const DictionaryLifetime & getLifetime() const override { return dict_lifetime; }
const DictionaryStructure & getStructure() const override { return dict_struct; }
bool isInjective(const std::string & attribute_name) const override
{
return dict_struct.attributes[&getAttribute(attribute_name) - attributes.data()].injective;
}
bool hasHierarchy() const override { return hierarchical_attribute; }
void toParent(const PaddedPODArray<Key> & ids, PaddedPODArray<Key> & out) const override;
void isInVectorVector(
const PaddedPODArray<Key> & child_ids, const PaddedPODArray<Key> & ancestor_ids, PaddedPODArray<UInt8> & out) const override;
void isInVectorConstant(const PaddedPODArray<Key> & child_ids, const Key ancestor_id, PaddedPODArray<UInt8> & out) const override;
void isInConstantVector(const Key child_id, const PaddedPODArray<Key> & ancestor_ids, PaddedPODArray<UInt8> & out) const override;
template <typename T>
using ResultArrayType = std::conditional_t<IsDecimalNumber<T>, DecimalPaddedPODArray<T>, PaddedPODArray<T>>;
#define DECLARE(TYPE) \
void get##TYPE(const std::string & attribute_name, const PaddedPODArray<Key> & ids, ResultArrayType<TYPE> & out) const;
DECLARE(UInt8)
DECLARE(UInt16)
DECLARE(UInt32)
DECLARE(UInt64)
DECLARE(UInt128)
DECLARE(Int8)
DECLARE(Int16)
DECLARE(Int32)
DECLARE(Int64)
DECLARE(Float32)
DECLARE(Float64)
DECLARE(Decimal32)
DECLARE(Decimal64)
DECLARE(Decimal128)
#undef DECLARE
void getString(const std::string & attribute_name, const PaddedPODArray<Key> & ids, ColumnString * out) const;
#define DECLARE(TYPE) \
void get##TYPE( \
const std::string & attribute_name, \
const PaddedPODArray<Key> & ids, \
const PaddedPODArray<TYPE> & def, \
ResultArrayType<TYPE> & out) const;
DECLARE(UInt8)
DECLARE(UInt16)
DECLARE(UInt32)
DECLARE(UInt64)
DECLARE(UInt128)
DECLARE(Int8)
DECLARE(Int16)
DECLARE(Int32)
DECLARE(Int64)
DECLARE(Float32)
DECLARE(Float64)
DECLARE(Decimal32)
DECLARE(Decimal64)
DECLARE(Decimal128)
#undef DECLARE
void
getString(const std::string & attribute_name, const PaddedPODArray<Key> & ids, const ColumnString * const def, ColumnString * const out)
const;
#define DECLARE(TYPE) \
void get##TYPE(const std::string & attribute_name, const PaddedPODArray<Key> & ids, const TYPE def, ResultArrayType<TYPE> & out) const;
DECLARE(UInt8)
DECLARE(UInt16)
DECLARE(UInt32)
DECLARE(UInt64)
DECLARE(UInt128)
DECLARE(Int8)
DECLARE(Int16)
DECLARE(Int32)
DECLARE(Int64)
DECLARE(Float32)
DECLARE(Float64)
DECLARE(Decimal32)
DECLARE(Decimal64)
DECLARE(Decimal128)
#undef DECLARE
void getString(const std::string & attribute_name, const PaddedPODArray<Key> & ids, const String & def, ColumnString * const out) const;
void has(const PaddedPODArray<Key> & ids, PaddedPODArray<UInt8> & out) const override;
BlockInputStreamPtr getBlockInputStream(const Names & column_names, size_t max_block_size) const override;
private:
template <typename Value>
using ContainerType = PaddedPODArray<Value>;
struct Attribute final
{
AttributeUnderlyingType type;
std::variant<
UInt8,
UInt16,
UInt32,
UInt64,
UInt128,
Int8,
Int16,
Int32,
Int64,
Decimal32,
Decimal64,
Decimal128,
Float32,
Float64,
StringRef>
null_values;
std::unique_ptr<Arena> string_arena;
std::string name;
};
void createAttributes();
template <typename T>
void addAttributeSize(const Attribute & attribute);
void calculateBytesAllocated();
template <typename T>
void createAttributeImpl(Attribute & attribute, const Field & null_value);
Attribute createAttributeWithType(const AttributeUnderlyingType type, const Field & null_value, const std::string & name);
template <typename AttributeType, typename OutputType, typename ValueSetter, typename DefaultGetter>
void getItemsStringImpl(
const Attribute & attribute, const PaddedPODArray<Key> & ids, ValueSetter && set_value, DefaultGetter && get_default) const;
template <typename AttributeType, typename OutputType, typename ValueSetter, typename DefaultGetter>
void getItemsImpl(
const Attribute & attribute, const PaddedPODArray<Key> & ids, ValueSetter && set_value, DefaultGetter && get_default) const;
template <typename T>
void resize(Attribute & attribute, const Key id);
template <typename T>
void setAttributeValueImpl(Attribute & attribute, const Key id, const T & value);
void setAttributeValue(Attribute & attribute, const Key id, const Field & value);
const Attribute & getAttribute(const std::string & attribute_name) const;
template <typename T>
void has(const Attribute & attribute, const PaddedPODArray<Key> & ids, PaddedPODArray<UInt8> & out) const;
Key getValueOrNullByKey(const Key & to_find) const;
template <typename ChildType, typename AncestorType>
void isInImpl(const ChildType & child_ids, const AncestorType & ancestor_ids, PaddedPODArray<UInt8> & out) const;
PaddedPODArray<Key> getIds() const;
const std::string database;
const std::string name;
const std::string full_name;
const DictionaryStructure dict_struct;
const DictionarySourcePtr source_ptr;
const DictionaryLifetime dict_lifetime;
std::map<std::string, size_t> attribute_index_by_name;
std::map<size_t, std::string> attribute_name_by_index;
std::vector<Attribute> attributes;
const Attribute * hierarchical_attribute = nullptr;
size_t bytes_allocated = 0;
size_t element_count = 0;
size_t bucket_count = 0;
mutable std::atomic<size_t> query_count{0};
BlockPtr saved_block;
};
}