ClickHouse/dbms/src/AggregateFunctions/AggregateFunctionGroupArray.cpp

#include <DB/AggregateFunctions/AggregateFunctionFactory.h>
#include <DB/AggregateFunctions/AggregateFunctionGroupArray.h>
#include <DB/AggregateFunctions/Helpers.h>

namespace DB
{

namespace
{

AggregateFunctionPtr createAggregateFunctionGroupArray(const std::string & name, const DataTypes & argument_types)
{
	if (argument_types.size() != 1)
		throw Exception("Incorrect number of arguments for aggregate function " + name,
			ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH);

	AggregateFunctionPtr res(createWithNumericType<AggregateFunctionGroupArrayNumeric>(*argument_types[0]));

	if (!res)
		res = std::make_shared<AggregateFunctionGroupArrayGeneric>();

	return res;
}

}

void registerAggregateFunctionGroupArray(AggregateFunctionFactory & factory)
{
	factory.registerFunction("groupArray", createAggregateFunctionGroupArray);
}

}