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#pragma once
#include <Core/Field.h>
#include <DataTypes/IDataType.h>
#include <IO/WriteHelpers.h>
namespace DB
{
struct Settings;
namespace ErrorCodes
{
extern const int AGGREGATE_FUNCTION_DOESNT_ALLOW_PARAMETERS;
extern const int NUMBER_OF_ARGUMENTS_DOESNT_MATCH;
}
inline void assertNoParameters(const std::string & name, const Array & parameters)
{
if (!parameters.empty())
throw Exception(ErrorCodes::AGGREGATE_FUNCTION_DOESNT_ALLOW_PARAMETERS, "Aggregate function {} cannot have parameters", name);
}
inline void assertUnary(const std::string & name, const DataTypes & argument_types)
{
if (argument_types.size() != 1)
throw Exception(ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH, "Aggregate function {} requires single argument", name);
}
inline void assertBinary(const std::string & name, const DataTypes & argument_types)
{
if (argument_types.size() != 2)
throw Exception(ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH, "Aggregate function {} requires two arguments", name);
}
template<std::size_t maximal_arity>
inline void assertArityAtMost(const std::string & name, const DataTypes & argument_types)
{
if (argument_types.size() <= maximal_arity)
return;
if constexpr (maximal_arity == 0)
throw Exception(ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH, "Aggregate function {} cannot have arguments", name);
if constexpr (maximal_arity == 1)
throw Exception(ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH, "Aggregate function {} requires zero or one argument",
name);
throw Exception(ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH, "Aggregate function {} requires at most {} arguments",
name, maximal_arity);
}
}
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