mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-11-16 12:44:42 +00:00
74 lines
2.6 KiB
C++
74 lines
2.6 KiB
C++
#include <AggregateFunctions/AggregateFunctionFactory.h>
|
|
#include <AggregateFunctions/AggregateFunctionSum.h>
|
|
#include <AggregateFunctions/Helpers.h>
|
|
#include <AggregateFunctions/FactoryHelpers.h>
|
|
#include "registerAggregateFunctions.h"
|
|
|
|
|
|
namespace DB
|
|
{
|
|
|
|
namespace
|
|
{
|
|
|
|
template <typename T>
|
|
struct SumSimple
|
|
{
|
|
/// @note It uses slow Decimal128 (cause we need such a variant). sumWithOverflow is faster for Decimal32/64
|
|
using ResultType = std::conditional_t<IsDecimalNumber<T>, Decimal128, NearestFieldType<T>>;
|
|
using AggregateDataType = AggregateFunctionSumData<ResultType>;
|
|
using Function = AggregateFunctionSum<T, ResultType, AggregateDataType>;
|
|
};
|
|
|
|
template <typename T>
|
|
struct SumSameType
|
|
{
|
|
using ResultType = T;
|
|
using AggregateDataType = AggregateFunctionSumData<ResultType>;
|
|
using Function = AggregateFunctionSum<T, ResultType, AggregateDataType>;
|
|
};
|
|
|
|
template <typename T>
|
|
struct SumKahan
|
|
{
|
|
using ResultType = Float64;
|
|
using AggregateDataType = AggregateFunctionSumKahanData<ResultType>;
|
|
using Function = AggregateFunctionSum<T, ResultType, AggregateDataType>;
|
|
};
|
|
|
|
template <typename T> using AggregateFunctionSumSimple = typename SumSimple<T>::Function;
|
|
template <typename T> using AggregateFunctionSumWithOverflow = typename SumSameType<T>::Function;
|
|
template <typename T> using AggregateFunctionSumKahan =
|
|
std::conditional_t<IsDecimalNumber<T>, typename SumSimple<T>::Function, typename SumKahan<T>::Function>;
|
|
|
|
|
|
template <template <typename> class Function>
|
|
AggregateFunctionPtr createAggregateFunctionSum(const std::string & name, const DataTypes & argument_types, const Array & parameters)
|
|
{
|
|
assertNoParameters(name, parameters);
|
|
assertUnary(name, argument_types);
|
|
|
|
AggregateFunctionPtr res;
|
|
DataTypePtr data_type = argument_types[0];
|
|
if (isDecimal(data_type))
|
|
res.reset(createWithDecimalType<Function>(*data_type, *data_type, argument_types));
|
|
else
|
|
res.reset(createWithNumericType<Function>(*data_type, argument_types));
|
|
|
|
if (!res)
|
|
throw Exception("Illegal type " + argument_types[0]->getName() + " of argument for aggregate function " + name,
|
|
ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT);
|
|
return res;
|
|
}
|
|
|
|
}
|
|
|
|
void registerAggregateFunctionSum(AggregateFunctionFactory & factory)
|
|
{
|
|
factory.registerFunction("sum", createAggregateFunctionSum<AggregateFunctionSumSimple>, AggregateFunctionFactory::CaseInsensitive);
|
|
factory.registerFunction("sumWithOverflow", createAggregateFunctionSum<AggregateFunctionSumWithOverflow>);
|
|
factory.registerFunction("sumKahan", createAggregateFunctionSum<AggregateFunctionSumKahan>);
|
|
}
|
|
|
|
}
|