mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-11-11 18:14:03 +00:00
471 lines
16 KiB
C++
471 lines
16 KiB
C++
#pragma once
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#include <openssl/md5.h>
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#include <city.h>
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#include <Poco/ByteOrder.h>
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#include <DB/Common/SipHash.h>
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#include <DB/DataTypes/DataTypesNumberFixed.h>
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#include <DB/DataTypes/DataTypeString.h>
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#include <DB/DataTypes/DataTypeDate.h>
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#include <DB/DataTypes/DataTypeDateTime.h>
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#include <DB/DataTypes/DataTypeArray.h>
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#include <DB/DataTypes/DataTypeFixedString.h>
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#include <DB/Columns/ColumnString.h>
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#include <DB/Columns/ColumnConst.h>
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#include <DB/Columns/ColumnFixedString.h>
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#include <DB/Columns/ColumnArray.h>
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#include <DB/Common/HashTable/Hash.h>
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#include <DB/Functions/IFunction.h>
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#include <stats/IntHash.h>
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namespace DB
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{
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/** Функции хэширования.
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*
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* Половинка MD5:
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* halfMD5: String -> UInt64
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*
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* Более быстрая криптографическая хэш-функция:
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* sipHash64: String -> UInt64
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*
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* Быстрая некриптографическая хэш функция для строк:
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* cityHash64: String -> UInt64
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*
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* Некриптографический хеш от кортежа значений любых типов (использует cityHash64 для строк и intHash64 для чисел):
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* cityHash64: any* -> UInt64
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*
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* Быстрая некриптографическая хэш функция от любого целого числа:
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* intHash32: number -> UInt32
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* intHash64: number -> UInt64
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*
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*/
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struct HalfMD5Impl
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{
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static UInt64 apply(const char * begin, size_t size)
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{
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union
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{
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unsigned char char_data[16];
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Poco::UInt64 uint64_data;
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} buf;
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MD5_CTX ctx;
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MD5_Init(&ctx);
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MD5_Update(&ctx, reinterpret_cast<const unsigned char *>(begin), size);
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MD5_Final(buf.char_data, &ctx);
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return Poco::ByteOrder::flipBytes(buf.uint64_data); /// Совместимость с существующим кодом.
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}
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};
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struct SipHash64Impl
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{
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static UInt64 apply(const char * begin, size_t size)
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{
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return sipHash64(begin, size);
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}
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};
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struct IntHash32Impl
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{
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typedef UInt32 ReturnType;
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static UInt32 apply(UInt64 x)
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{
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/// seed взят из /dev/urandom. Он позволяет избежать нежелательных зависимостей с хэшами в разных структурах данных.
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return intHash32<0x75D9543DE018BF45ULL>(x);
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}
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};
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struct IntHash64Impl
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{
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typedef UInt64 ReturnType;
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static UInt64 apply(UInt64 x)
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{
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return intHash64(x ^ 0x4CF2D2BAAE6DA887ULL);
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}
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};
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template <typename Impl, typename Name>
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class FunctionStringHash64 : public IFunction
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{
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public:
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/// Получить имя функции.
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String getName() const
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{
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return Name::get();
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}
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/// Получить тип результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
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DataTypePtr getReturnType(const DataTypes & arguments) const
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{
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if (arguments.size() != 1)
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throw Exception("Number of arguments for function " + getName() + " doesn't match: passed "
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+ toString(arguments.size()) + ", should be 1.",
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ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH);
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if (!typeid_cast<const DataTypeString *>(&*arguments[0]))
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throw Exception("Illegal type " + arguments[0]->getName() + " of argument of function " + getName(),
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ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT);
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return new DataTypeUInt64;
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}
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/// Выполнить функцию над блоком.
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void execute(Block & block, const ColumnNumbers & arguments, size_t result)
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{
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if (const ColumnString * col_from = typeid_cast<const ColumnString *>(&*block.getByPosition(arguments[0]).column))
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{
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ColumnUInt64 * col_to = new ColumnUInt64;
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block.getByPosition(result).column = col_to;
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const typename ColumnString::Chars_t & data = col_from->getChars();
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const typename ColumnString::Offsets_t & offsets = col_from->getOffsets();
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typename ColumnUInt64::Container_t & vec_to = col_to->getData();
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size_t size = offsets.size();
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vec_to.resize(size);
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for (size_t i = 0; i < size; ++i)
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vec_to[i] = Impl::apply(
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reinterpret_cast<const char *>(&data[i == 0 ? 0 : offsets[i - 1]]),
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i == 0 ? offsets[i] - 1 : (offsets[i] - 1 - offsets[i - 1]));
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}
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else if (const ColumnConstString * col_from = typeid_cast<const ColumnConstString *>(&*block.getByPosition(arguments[0]).column))
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{
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block.getByPosition(result).column = new ColumnConstUInt64(
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col_from->size(),
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Impl::apply(col_from->getData().data(), col_from->getData().size()));
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}
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else
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throw Exception("Illegal column " + block.getByPosition(arguments[0]).column->getName()
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+ " of first argument of function " + Name::get(),
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ErrorCodes::ILLEGAL_COLUMN);
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}
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};
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template <typename Impl, typename Name>
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class FunctionIntHash : public IFunction
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{
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private:
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typedef typename Impl::ReturnType ToType;
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template <typename FromType>
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void executeType(Block & block, const ColumnNumbers & arguments, size_t result)
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{
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if (ColumnVector<FromType> * col_from = typeid_cast<ColumnVector<FromType> *>(&*block.getByPosition(arguments[0]).column))
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{
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ColumnVector<ToType> * col_to = new ColumnVector<ToType>;
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block.getByPosition(result).column = col_to;
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const typename ColumnVector<FromType>::Container_t & vec_from = col_from->getData();
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typename ColumnVector<ToType>::Container_t & vec_to = col_to->getData();
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size_t size = vec_from.size();
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vec_to.resize(size);
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for (size_t i = 0; i < size; ++i)
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vec_to[i] = Impl::apply(vec_from[i]);
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}
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else if (ColumnConst<FromType> * col_from = typeid_cast<ColumnConst<FromType> *>(&*block.getByPosition(arguments[0]).column))
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{
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block.getByPosition(result).column = new ColumnConst<ToType>(col_from->size(), Impl::apply(col_from->getData()));
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}
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else
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throw Exception("Illegal column " + block.getByPosition(arguments[0]).column->getName()
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+ " of first argument of function " + Name::get(),
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ErrorCodes::ILLEGAL_COLUMN);
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}
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public:
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/// Получить имя функции.
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String getName() const
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{
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return Name::get();
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}
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/// Получить тип результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
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DataTypePtr getReturnType(const DataTypes & arguments) const
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{
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if (arguments.size() != 1)
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throw Exception("Number of arguments for function " + getName() + " doesn't match: passed "
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+ toString(arguments.size()) + ", should be 1.",
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ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH);
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if (!arguments[0]->isNumeric())
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throw Exception("Illegal type " + arguments[0]->getName() + " of argument of function " + getName(),
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ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT);
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return new typename DataTypeFromFieldType<typename Impl::ReturnType>::Type;
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}
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/// Выполнить функцию над блоком.
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void execute(Block & block, const ColumnNumbers & arguments, size_t result)
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{
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IDataType * from_type = &*block.getByPosition(arguments[0]).type;
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if (typeid_cast<const DataTypeUInt8 * >(from_type)) executeType<UInt8 >(block, arguments, result);
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else if (typeid_cast<const DataTypeUInt16 * >(from_type)) executeType<UInt16>(block, arguments, result);
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else if (typeid_cast<const DataTypeUInt32 * >(from_type)) executeType<UInt32>(block, arguments, result);
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else if (typeid_cast<const DataTypeUInt64 * >(from_type)) executeType<UInt64>(block, arguments, result);
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else if (typeid_cast<const DataTypeInt8 * >(from_type)) executeType<Int8 >(block, arguments, result);
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else if (typeid_cast<const DataTypeInt16 * >(from_type)) executeType<Int16 >(block, arguments, result);
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else if (typeid_cast<const DataTypeInt32 * >(from_type)) executeType<Int32 >(block, arguments, result);
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else if (typeid_cast<const DataTypeInt64 * >(from_type)) executeType<Int64 >(block, arguments, result);
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else if (typeid_cast<const DataTypeDate * >(from_type)) executeType<UInt16>(block, arguments, result);
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else if (typeid_cast<const DataTypeDateTime * >(from_type)) executeType<UInt32>(block, arguments, result);
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else
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throw Exception("Illegal type " + block.getByPosition(arguments[0]).type->getName() + " of argument of function " + getName(),
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ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT);
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}
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};
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template <typename T>
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static UInt64 toInteger(T x)
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{
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return x;
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}
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template <>
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UInt64 toInteger<Float32>(Float32 x)
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{
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UInt32 res;
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memcpy(&res, &x, sizeof(x));
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return res;
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}
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template <>
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UInt64 toInteger<Float64>(Float64 x)
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{
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UInt64 res;
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memcpy(&res, &x, sizeof(x));
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return res;
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}
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class FunctionCityHash64 : public IFunction
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{
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private:
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template <typename FromType, bool first>
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void executeIntType(const IColumn * column, ColumnUInt64::Container_t & vec_to)
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{
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if (const ColumnVector<FromType> * col_from = typeid_cast<const ColumnVector<FromType> *>(column))
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{
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const typename ColumnVector<FromType>::Container_t & vec_from = col_from->getData();
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size_t size = vec_from.size();
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for (size_t i = 0; i < size; ++i)
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{
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UInt64 h = IntHash64Impl::apply(toInteger(vec_from[i]));
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if (first)
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vec_to[i] = h;
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else
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vec_to[i] = Hash128to64(uint128(vec_to[i], h));
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}
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}
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else if (const ColumnConst<FromType> * col_from = typeid_cast<const ColumnConst<FromType> *>(column))
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{
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UInt64 hash = IntHash64Impl::apply(toInteger(col_from->getData()));
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size_t size = vec_to.size();
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if (first)
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{
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vec_to.assign(size, hash);
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}
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else
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{
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for (size_t i = 0; i < size; ++i)
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vec_to[i] = Hash128to64(uint128(vec_to[i], hash));
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}
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}
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else
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throw Exception("Illegal column " + column->getName()
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+ " of argument of function " + getName(),
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ErrorCodes::ILLEGAL_COLUMN);
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}
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template <bool first>
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void executeString(const IColumn * column, ColumnUInt64::Container_t & vec_to)
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{
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if (const ColumnString * col_from = typeid_cast<const ColumnString *>(column))
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{
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const typename ColumnString::Chars_t & data = col_from->getChars();
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const typename ColumnString::Offsets_t & offsets = col_from->getOffsets();
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size_t size = offsets.size();
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for (size_t i = 0; i < size; ++i)
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{
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UInt64 h = CityHash64(
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reinterpret_cast<const char *>(&data[i == 0 ? 0 : offsets[i - 1]]),
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i == 0 ? offsets[i] - 1 : (offsets[i] - 1 - offsets[i - 1]));
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if (first)
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vec_to[i] = h;
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else
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vec_to[i] = Hash128to64(uint128(vec_to[i], h));
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}
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}
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else if (const ColumnFixedString * col_from = typeid_cast<const ColumnFixedString *>(column))
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{
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const typename ColumnString::Chars_t & data = col_from->getChars();
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size_t n = col_from->getN();
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size_t size = data.size() / n;
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for (size_t i = 0; i < size; ++i)
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{
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UInt64 h = CityHash64(reinterpret_cast<const char *>(&data[i * n]), n);
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if (first)
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vec_to[i] = h;
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else
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vec_to[i] = Hash128to64(uint128(vec_to[i], h));
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}
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}
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else if (const ColumnConstString * col_from = typeid_cast<const ColumnConstString *>(column))
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{
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UInt64 hash = CityHash64(col_from->getData().data(), col_from->getData().size());
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size_t size = vec_to.size();
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if (first)
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{
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vec_to.assign(size, hash);
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}
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else
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{
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for (size_t i = 0; i < size; ++i)
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{
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vec_to[i] = Hash128to64(uint128(vec_to[i], hash));
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}
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}
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}
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else
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throw Exception("Illegal column " + column->getName()
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+ " of first argument of function " + getName(),
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ErrorCodes::ILLEGAL_COLUMN);
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}
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template <bool first>
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void executeArray(const IDataType * type, const IColumn * column, ColumnUInt64::Container_t & vec_to)
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{
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const IDataType * nested_type = &*typeid_cast<const DataTypeArray *>(type)->getNestedType();
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if (const ColumnArray * col_from = typeid_cast<const ColumnArray *>(column))
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{
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const IColumn * nested_column = &col_from->getData();
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const ColumnArray::Offsets_t & offsets = col_from->getOffsets();
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size_t nested_size = nested_column->size();
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ColumnUInt64::Container_t vec_temp(nested_size);
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executeAny<true>(nested_type, nested_column, vec_temp);
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size_t size = offsets.size();
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for (size_t i = 0; i < size; ++i)
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{
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size_t begin = i == 0 ? 0 : offsets[i - 1];
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size_t end = offsets[i];
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UInt64 h = IntHash64Impl::apply(end - begin);
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if (first)
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vec_to[i] = h;
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else
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vec_to[i] = Hash128to64(uint128(vec_to[i], h));
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for (size_t j = begin; j < end; ++j)
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vec_to[i] = Hash128to64(uint128(vec_to[i], vec_temp[j]));
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}
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}
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else if (const ColumnConstArray * col_from = typeid_cast<const ColumnConstArray *>(column))
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{
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/// NOTE: тут, конечно, можно обойтись без материалиации столбца.
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ColumnPtr full_column = col_from->convertToFullColumn();
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executeArray<first>(type, &*full_column, vec_to);
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}
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else
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throw Exception("Illegal column " + column->getName()
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+ " of first argument of function " + getName(),
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ErrorCodes::ILLEGAL_COLUMN);
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}
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template <bool first>
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void executeAny(const IDataType * from_type, const IColumn * icolumn, ColumnUInt64::Container_t & vec_to)
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{
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if (typeid_cast<const DataTypeUInt8 * >(from_type)) executeIntType<UInt8, first>(icolumn, vec_to);
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else if (typeid_cast<const DataTypeUInt16 * >(from_type)) executeIntType<UInt16, first>(icolumn, vec_to);
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else if (typeid_cast<const DataTypeUInt32 * >(from_type)) executeIntType<UInt32, first>(icolumn, vec_to);
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else if (typeid_cast<const DataTypeUInt64 * >(from_type)) executeIntType<UInt64, first>(icolumn, vec_to);
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else if (typeid_cast<const DataTypeInt8 * >(from_type)) executeIntType<Int8, first>(icolumn, vec_to);
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else if (typeid_cast<const DataTypeInt16 * >(from_type)) executeIntType<Int16, first>(icolumn, vec_to);
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else if (typeid_cast<const DataTypeInt32 * >(from_type)) executeIntType<Int32, first>(icolumn, vec_to);
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else if (typeid_cast<const DataTypeInt64 * >(from_type)) executeIntType<Int64, first>(icolumn, vec_to);
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else if (typeid_cast<const DataTypeDate * >(from_type)) executeIntType<UInt16, first>(icolumn, vec_to);
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else if (typeid_cast<const DataTypeDateTime * >(from_type)) executeIntType<UInt32, first>(icolumn, vec_to);
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else if (typeid_cast<const DataTypeFloat32 * >(from_type)) executeIntType<Float32, first>(icolumn, vec_to);
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else if (typeid_cast<const DataTypeFloat64 * >(from_type)) executeIntType<Float64, first>(icolumn, vec_to);
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else if (typeid_cast<const DataTypeString * >(from_type)) executeString < first>(icolumn, vec_to);
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else if (typeid_cast<const DataTypeFixedString *>(from_type)) executeString < first>(icolumn, vec_to);
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else if (typeid_cast<const DataTypeArray * >(from_type)) executeArray < first>(from_type, icolumn, vec_to);
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else
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throw Exception("Unexpected type " + from_type->getName() + " of argument of function " + getName(),
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ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT);
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}
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public:
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/// Получить имя функции.
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String getName() const
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{
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return "cityHash64";
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}
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/// Получить тип результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
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DataTypePtr getReturnType(const DataTypes & arguments) const
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{
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return new DataTypeUInt64;
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}
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/// Выполнить функцию над блоком.
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void execute(Block & block, const ColumnNumbers & arguments, size_t result)
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{
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size_t rows = block.rowsInFirstColumn();
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ColumnUInt64 * col_to = new ColumnUInt64(rows);
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block.getByPosition(result).column = col_to;
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ColumnUInt64::Container_t & vec_to = col_to->getData();
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if (arguments.empty())
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{
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/// Случайное число из /dev/urandom используется как хеш пустого кортежа.
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vec_to.assign(rows, 0xe28dbde7fe22e41c);
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}
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for (size_t i = 0; i < arguments.size(); ++i)
|
||
{
|
||
const ColumnWithNameAndType & column = block.getByPosition(arguments[i]);
|
||
const IDataType * from_type = &*column.type;
|
||
const IColumn * icolumn = &*column.column;
|
||
|
||
if (i == 0)
|
||
executeAny<true>(from_type, icolumn, vec_to);
|
||
else
|
||
executeAny<false>(from_type, icolumn, vec_to);
|
||
}
|
||
}
|
||
};
|
||
|
||
|
||
struct NameHalfMD5 { static const char * get() { return "halfMD5"; } };
|
||
struct NameSipHash64 { static const char * get() { return "sipHash64"; } };
|
||
struct NameCityHash64 { static const char * get() { return "cityHash64"; } };
|
||
struct NameIntHash32 { static const char * get() { return "intHash32"; } };
|
||
struct NameIntHash64 { static const char * get() { return "intHash64"; } };
|
||
|
||
typedef FunctionStringHash64<HalfMD5Impl, NameHalfMD5> FunctionHalfMD5;
|
||
typedef FunctionStringHash64<SipHash64Impl, NameSipHash64> FunctionSipHash64;
|
||
typedef FunctionIntHash<IntHash32Impl, NameIntHash32> FunctionIntHash32;
|
||
typedef FunctionIntHash<IntHash64Impl, NameIntHash64> FunctionIntHash64;
|
||
|
||
|
||
}
|