mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-10-01 14:10:50 +00:00
101 lines
3.5 KiB
C++
101 lines
3.5 KiB
C++
#include <AggregateFunctions/AggregateFunctionFactory.h>
|
|
#include <AggregateFunctions/AggregateFunctionGroupArrayMoving.h>
|
|
#include <AggregateFunctions/Helpers.h>
|
|
#include <AggregateFunctions/FactoryHelpers.h>
|
|
#include <DataTypes/DataTypeDate.h>
|
|
#include <DataTypes/DataTypeDateTime.h>
|
|
|
|
|
|
namespace DB
|
|
{
|
|
|
|
namespace ErrorCodes
|
|
{
|
|
extern const int NUMBER_OF_ARGUMENTS_DOESNT_MATCH;
|
|
extern const int BAD_ARGUMENTS;
|
|
}
|
|
|
|
namespace
|
|
{
|
|
|
|
template <typename T, typename Tlimit_num_elems>
|
|
struct MovingSum
|
|
{
|
|
using DataType = MovingSumData<T>;
|
|
using Function = MovingImpl<T, Tlimit_num_elems, DataType>;
|
|
};
|
|
|
|
template <typename T, typename Tlimit_num_elems>
|
|
struct MovingAvg
|
|
{
|
|
using DataType = MovingAvgData<T>;
|
|
using Function = MovingImpl<T, Tlimit_num_elems, DataType>;
|
|
};
|
|
|
|
template <typename T, typename Tlimit_num_elems> using MovingSumTemplate = typename MovingSum<T, Tlimit_num_elems>::Function;
|
|
template <typename T, typename Tlimit_num_elems> using MovingAvgTemplate = typename MovingAvg<T, Tlimit_num_elems>::Function;
|
|
|
|
template <template <typename, typename> class Function, typename has_limit, typename ... TArgs>
|
|
inline AggregateFunctionPtr createAggregateFunctionMovingImpl(const std::string & name, const DataTypePtr & argument_type, TArgs ... args)
|
|
{
|
|
AggregateFunctionPtr res;
|
|
|
|
if (isDecimal(argument_type))
|
|
res.reset(createWithDecimalType<Function, has_limit>(*argument_type, argument_type, std::forward<TArgs>(args)...));
|
|
else
|
|
res.reset(createWithNumericType<Function, has_limit>(*argument_type, argument_type, std::forward<TArgs>(args)...));
|
|
|
|
if (!res)
|
|
throw Exception("Illegal type " + argument_type->getName() + " of argument for aggregate function " + name,
|
|
ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT);
|
|
|
|
return res;
|
|
}
|
|
|
|
template <template <typename, typename> class Function>
|
|
AggregateFunctionPtr createAggregateFunctionMoving(const std::string & name, const DataTypes & argument_types, const Array & parameters)
|
|
{
|
|
assertUnary(name, argument_types);
|
|
|
|
bool limit_size = false;
|
|
|
|
UInt64 max_elems = std::numeric_limits<UInt64>::max();
|
|
|
|
if (parameters.empty())
|
|
{
|
|
// cumulative sum without parameter
|
|
}
|
|
else if (parameters.size() == 1)
|
|
{
|
|
auto type = parameters[0].getType();
|
|
if (type != Field::Types::Int64 && type != Field::Types::UInt64)
|
|
throw Exception("Parameter for aggregate function " + name + " should be positive number", ErrorCodes::BAD_ARGUMENTS);
|
|
|
|
if ((type == Field::Types::Int64 && parameters[0].get<Int64>() < 0) ||
|
|
(type == Field::Types::UInt64 && parameters[0].get<UInt64>() == 0))
|
|
throw Exception("Parameter for aggregate function " + name + " should be positive number", ErrorCodes::BAD_ARGUMENTS);
|
|
|
|
limit_size = true;
|
|
max_elems = parameters[0].get<UInt64>();
|
|
}
|
|
else
|
|
throw Exception("Incorrect number of parameters for aggregate function " + name + ", should be 0 or 1",
|
|
ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH);
|
|
|
|
if (!limit_size)
|
|
return createAggregateFunctionMovingImpl<Function, std::false_type>(name, argument_types[0]);
|
|
else
|
|
return createAggregateFunctionMovingImpl<Function, std::true_type>(name, argument_types[0], max_elems);
|
|
}
|
|
|
|
}
|
|
|
|
|
|
void registerAggregateFunctionMoving(AggregateFunctionFactory & factory)
|
|
{
|
|
factory.registerFunction("groupArrayMovingSum", createAggregateFunctionMoving<MovingSumTemplate>);
|
|
factory.registerFunction("groupArrayMovingAvg", createAggregateFunctionMoving<MovingAvgTemplate>);
|
|
}
|
|
|
|
}
|