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#include <AggregateFunctions/AggregateFunctionDeltaSum.h>
#include <AggregateFunctions/AggregateFunctionFactory.h>
#include <AggregateFunctions/FactoryHelpers.h>
#include <AggregateFunctions/Helpers.h>
namespace DB
{
struct Settings;
namespace ErrorCodes
{
extern const int NUMBER_OF_ARGUMENTS_DOESNT_MATCH;
extern const int ILLEGAL_TYPE_OF_ARGUMENT;
}
namespace
{
AggregateFunctionPtr createAggregateFunctionDeltaSum(
const String & name,
const DataTypes & arguments,
const Array & params,
const Settings *)
{
assertNoParameters(name, params);
if (arguments.size() != 1)
throw Exception(ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH,
"Incorrect number of arguments for aggregate function {}", name);
const DataTypePtr & data_type = arguments[0];
if (isInteger(data_type) || isFloat(data_type))
return AggregateFunctionPtr(createWithNumericType<AggregationFunctionDeltaSum>(
*data_type, arguments, params));
else
throw Exception(ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT, "Illegal type {} of argument for aggregate function {}",
arguments[0]->getName(), name);
}
}
void registerAggregateFunctionDeltaSum(AggregateFunctionFactory & factory)
{
AggregateFunctionProperties properties = { .returns_default_when_only_null = true, .is_order_dependent = true };
factory.registerFunction("deltaSum", { createAggregateFunctionDeltaSum, properties });
}
}
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