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#pragma once
#include <Core/callOnTypeIndex.h>
#include <DataTypes/DataTypesNumber.h>
#include <DataTypes/DataTypesDecimal.h>
#include <Columns/ColumnsNumber.h>
#include <Columns/ColumnDecimal.h>
#include <Columns/ColumnConst.h>
#include <Functions/IFunction.h>
#include <Functions/FunctionHelpers.h>
#include "clickhouse_config.h"
namespace DB
{
namespace ErrorCodes
{
extern const int ILLEGAL_TYPE_OF_ARGUMENT;
extern const int ILLEGAL_COLUMN;
}
template <typename Impl>
class FunctionMathBinaryFloat64 : public IFunction
{
public:
static constexpr auto name = Impl::name;
static FunctionPtr create(ContextPtr) { return std::make_shared<FunctionMathBinaryFloat64>(); }
static_assert(Impl::rows_per_iteration > 0, "Impl must process at least one row per iteration");
bool useDefaultImplementationForConstants() const override { return true; }
bool isSuitableForShortCircuitArgumentsExecution(const DataTypesWithConstInfo & /*arguments*/) const override { return false; }
private:
String getName() const override { return name; }
size_t getNumberOfArguments() const override { return 2; }
DataTypePtr getReturnTypeImpl(const DataTypes & arguments) const override
{
const auto check_argument_type = [this] (const IDataType * arg)
{
if (!isNativeNumber(arg))
throw Exception(ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT, "Illegal type {} of argument of function {}",
arg->getName(), getName());
};
check_argument_type(arguments.front().get());
check_argument_type(arguments.back().get());
return std::make_shared<DataTypeFloat64>();
}
template <typename LeftType, typename RightType>
ColumnPtr executeTyped(const ColumnConst * left_arg, const IColumn * right_arg) const
{
if (const auto right_arg_typed = checkAndGetColumn<ColumnVector<RightType>>(right_arg))
{
auto dst = ColumnVector<Float64>::create();
LeftType left_src_data[Impl::rows_per_iteration];
std::fill(std::begin(left_src_data), std::end(left_src_data), left_arg->template getValue<LeftType>());
const auto & right_src_data = right_arg_typed->getData();
const auto src_size = right_src_data.size();
auto & dst_data = dst->getData();
dst_data.resize(src_size);
const auto rows_remaining = src_size % Impl::rows_per_iteration;
const auto rows_size = src_size - rows_remaining;
for (size_t i = 0; i < rows_size; i += Impl::rows_per_iteration)
Impl::execute(left_src_data, &right_src_data[i], &dst_data[i]);
if (rows_remaining != 0)
{
RightType right_src_remaining[Impl::rows_per_iteration];
memcpy(right_src_remaining, &right_src_data[rows_size], rows_remaining * sizeof(RightType));
memset(right_src_remaining + rows_remaining, 0, (Impl::rows_per_iteration - rows_remaining) * sizeof(RightType));
Float64 dst_remaining[Impl::rows_per_iteration];
Impl::execute(left_src_data, right_src_remaining, dst_remaining);
memcpy(&dst_data[rows_size], dst_remaining, rows_remaining * sizeof(Float64));
}
return dst;
}
return nullptr;
}
template <typename LeftType, typename RightType>
ColumnPtr executeTyped(const ColumnVector<LeftType> * left_arg, const IColumn * right_arg) const
{
if (const auto right_arg_typed = checkAndGetColumn<ColumnVector<RightType>>(right_arg))
{
auto dst = ColumnVector<Float64>::create();
const auto & left_src_data = left_arg->getData();
const auto & right_src_data = right_arg_typed->getData();
const auto src_size = left_src_data.size();
auto & dst_data = dst->getData();
dst_data.resize(src_size);
const auto rows_remaining = src_size % Impl::rows_per_iteration;
const auto rows_size = src_size - rows_remaining;
for (size_t i = 0; i < rows_size; i += Impl::rows_per_iteration)
Impl::execute(&left_src_data[i], &right_src_data[i], &dst_data[i]);
if (rows_remaining != 0)
{
LeftType left_src_remaining[Impl::rows_per_iteration];
memcpy(left_src_remaining, &left_src_data[rows_size], rows_remaining * sizeof(LeftType));
memset(left_src_remaining + rows_remaining, 0, (Impl::rows_per_iteration - rows_remaining) * sizeof(LeftType));
RightType right_src_remaining[Impl::rows_per_iteration];
memcpy(right_src_remaining, &right_src_data[rows_size], rows_remaining * sizeof(RightType));
memset(right_src_remaining + rows_remaining, 0, (Impl::rows_per_iteration - rows_remaining) * sizeof(RightType));
Float64 dst_remaining[Impl::rows_per_iteration];
Impl::execute(left_src_remaining, right_src_remaining, dst_remaining);
memcpy(&dst_data[rows_size], dst_remaining, rows_remaining * sizeof(Float64));
}
return dst;
}
if (const auto right_arg_typed = checkAndGetColumnConst<ColumnVector<RightType>>(right_arg))
{
auto dst = ColumnVector<Float64>::create();
const auto & left_src_data = left_arg->getData();
RightType right_src_data[Impl::rows_per_iteration];
std::fill(std::begin(right_src_data), std::end(right_src_data), right_arg_typed->template getValue<RightType>());
const auto src_size = left_src_data.size();
auto & dst_data = dst->getData();
dst_data.resize(src_size);
const auto rows_remaining = src_size % Impl::rows_per_iteration;
const auto rows_size = src_size - rows_remaining;
for (size_t i = 0; i < rows_size; i += Impl::rows_per_iteration)
Impl::execute(&left_src_data[i], right_src_data, &dst_data[i]);
if (rows_remaining != 0)
{
LeftType left_src_remaining[Impl::rows_per_iteration];
memcpy(left_src_remaining, &left_src_data[rows_size], rows_remaining * sizeof(LeftType));
memset(left_src_remaining + rows_remaining, 0, (Impl::rows_per_iteration - rows_remaining) * sizeof(LeftType));
Float64 dst_remaining[Impl::rows_per_iteration];
Impl::execute(left_src_remaining, right_src_data, dst_remaining);
memcpy(&dst_data[rows_size], dst_remaining, rows_remaining * sizeof(Float64));
}
return dst;
}
return nullptr;
}
ColumnPtr executeImpl(const ColumnsWithTypeAndName & arguments, const DataTypePtr &, size_t /*input_rows_count*/) const override
{
const ColumnWithTypeAndName & col_left = arguments[0];
const ColumnWithTypeAndName & col_right = arguments[1];
ColumnPtr res;
auto call = [&](const auto & types) -> bool
{
using Types = std::decay_t<decltype(types)>;
using LeftType = typename Types::LeftType;
using RightType = typename Types::RightType;
using ColVecLeft = ColumnVector<LeftType>;
const IColumn * left_arg = col_left.column.get();
const IColumn * right_arg = col_right.column.get();
if (const auto left_arg_typed = checkAndGetColumn<ColVecLeft>(left_arg))
{
if ((res = executeTyped<LeftType, RightType>(left_arg_typed, right_arg)))
return true;
throw Exception(ErrorCodes::ILLEGAL_COLUMN, "Illegal column {} of second argument of function {}",
right_arg->getName(), getName());
}
if (const auto left_arg_typed = checkAndGetColumnConst<ColVecLeft>(left_arg))
{
if ((res = executeTyped<LeftType, RightType>(left_arg_typed, right_arg)))
return true;
throw Exception(ErrorCodes::ILLEGAL_COLUMN, "Illegal column {} of second argument of function {}",
right_arg->getName(), getName());
}
return false;
};
TypeIndex left_index = col_left.type->getTypeId();
TypeIndex right_index = col_right.type->getTypeId();
if (!callOnBasicTypes<true, true, false, false>(left_index, right_index, call))
throw Exception(ErrorCodes::ILLEGAL_COLUMN, "Illegal column {} of argument of function {}",
col_left.column->getName(), getName());
return res;
}
};
template <typename Name, Float64(Function)(Float64, Float64)>
struct BinaryFunctionVectorized
{
static constexpr auto name = Name::name;
static constexpr auto rows_per_iteration = 1;
template <typename T1, typename T2>
static void execute(const T1 * src_left, const T2 * src_right, Float64 * dst)
{
dst[0] = static_cast<Float64>(Function(static_cast<Float64>(src_left[0]), static_cast<Float64>(src_right[0])));
}
};
}
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