ClickHouse/dbms/src/Dictionaries/ComplexKeyHashedDictionary.h
2017-11-15 23:31:53 +03:00

227 lines
7.3 KiB
C++

#pragma once
#include <Dictionaries/IDictionary.h>
#include <Dictionaries/IDictionarySource.h>
#include <Dictionaries/DictionaryStructure.h>
#include <common/StringRef.h>
#include <Common/HashTable/HashMap.h>
#include <Columns/ColumnString.h>
#include <Common/Arena.h>
#include <ext/range.h>
#include <atomic>
#include <memory>
#include <tuple>
namespace DB
{
class ComplexKeyHashedDictionary final : public IDictionaryBase
{
public:
ComplexKeyHashedDictionary(
const std::string & name, const DictionaryStructure & dict_struct, DictionarySourcePtr source_ptr,
const DictionaryLifetime dict_lifetime, bool require_nonempty);
ComplexKeyHashedDictionary(const ComplexKeyHashedDictionary & other);
std::string getKeyDescription() const { return key_description; };
std::exception_ptr getCreationException() const override { return creation_exception; }
std::string getName() const override { return name; }
std::string getTypeName() const override { return "ComplexKeyHashed"; }
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; }
bool isCached() const override { return false; }
std::unique_ptr<IExternalLoadable> clone() const override { return std::make_unique<ComplexKeyHashedDictionary>(*this); }
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; }
std::chrono::time_point<std::chrono::system_clock> getCreationTime() const override
{
return creation_time;
}
bool isInjective(const std::string & attribute_name) const override
{
return dict_struct.attributes[&getAttribute(attribute_name) - attributes.data()].injective;
}
#define DECLARE(TYPE)\
void get##TYPE(\
const std::string & attribute_name, const Columns & key_columns, const DataTypes & key_types,\
PaddedPODArray<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)
#undef DECLARE
void getString(
const std::string & attribute_name, const Columns & key_columns, const DataTypes & key_types,
ColumnString * out) const;
#define DECLARE(TYPE)\
void get##TYPE(\
const std::string & attribute_name, const Columns & key_columns, const DataTypes & key_types,\
const PaddedPODArray<TYPE> & def, PaddedPODArray<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)
#undef DECLARE
void getString(
const std::string & attribute_name, const Columns & key_columns, const DataTypes & key_types,
const ColumnString * const def, ColumnString * const out) const;
#define DECLARE(TYPE)\
void get##TYPE(\
const std::string & attribute_name, const Columns & key_columns, const DataTypes & key_types,\
const TYPE def, PaddedPODArray<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)
#undef DECLARE
void getString(
const std::string & attribute_name, const Columns & key_columns, const DataTypes & key_types,
const String & def, ColumnString * const out) const;
void has(const Columns & key_columns, const DataTypes & key_types, PaddedPODArray<UInt8> & out) const;
BlockInputStreamPtr getBlockInputStream(const Names & column_names, size_t max_block_size) const override;
private:
template <typename Value> using ContainerType = HashMapWithSavedHash<StringRef, Value, StringRefHash>;
template <typename Value> using ContainerPtrType = std::unique_ptr<ContainerType<Value>>;
struct Attribute final
{
AttributeUnderlyingType type;
std::tuple<
UInt8, UInt16, UInt32, UInt64,
UInt128,
Int8, Int16, Int32, Int64,
Float32, Float64,
String> null_values;
std::tuple<
ContainerPtrType<UInt8>, ContainerPtrType<UInt16>, ContainerPtrType<UInt32>, ContainerPtrType<UInt64>,
ContainerPtrType<UInt128>,
ContainerPtrType<Int8>, ContainerPtrType<Int16>, ContainerPtrType<Int32>, ContainerPtrType<Int64>,
ContainerPtrType<Float32>, ContainerPtrType<Float64>,
ContainerPtrType<StringRef>> maps;
std::unique_ptr<Arena> string_arena;
};
void createAttributes();
void loadData();
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);
template <typename OutputType, typename ValueSetter, typename DefaultGetter>
void getItemsNumber(
const Attribute & attribute,
const Columns & key_columns,
ValueSetter && set_value,
DefaultGetter && get_default) const;
template <typename AttributeType, typename OutputType, typename ValueSetter, typename DefaultGetter>
void getItemsImpl(
const Attribute & attribute,
const Columns & key_columns,
ValueSetter && set_value,
DefaultGetter && get_default) const;
template <typename T>
bool setAttributeValueImpl(Attribute & attribute, const StringRef key, const T value);
bool setAttributeValue(Attribute & attribute, const StringRef key, const Field & value);
const Attribute & getAttribute(const std::string & attribute_name) const;
static StringRef placeKeysInPool(
const size_t row, const Columns & key_columns, StringRefs & keys, Arena & pool);
template <typename T>
void has(const Attribute & attribute, const Columns & key_columns, PaddedPODArray<UInt8> & out) const;
std::vector<StringRef> getKeys() const;
template <typename T>
std::vector<StringRef> getKeys(const Attribute & attribute) const;
const std::string name;
const DictionaryStructure dict_struct;
const DictionarySourcePtr source_ptr;
const DictionaryLifetime dict_lifetime;
const bool require_nonempty;
const std::string key_description{dict_struct.getKeyDescription()};
std::map<std::string, size_t> attribute_index_by_name;
std::vector<Attribute> attributes;
Arena keys_pool;
size_t bytes_allocated = 0;
size_t element_count = 0;
size_t bucket_count = 0;
mutable std::atomic<size_t> query_count{0};
std::chrono::time_point<std::chrono::system_clock> creation_time;
std::exception_ptr creation_exception;
};
}