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