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40 lines
1.2 KiB
C++
40 lines
1.2 KiB
C++
#include <Functions/FunctionFactory.h>
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#include <Functions/FunctionBinaryArithmetic.h>
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#include <numeric>
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namespace DB
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{
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template <typename A, typename B>
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struct LCMImpl
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{
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using ResultType = typename NumberTraits::ResultOfAdditionMultiplication<A, B>::Type;
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static const constexpr bool allow_fixed_string = false;
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template <typename Result = ResultType>
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static inline Result apply(A a, B b)
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{
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throwIfDivisionLeadsToFPE(typename NumberTraits::ToInteger<A>::Type(a), typename NumberTraits::ToInteger<B>::Type(b));
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throwIfDivisionLeadsToFPE(typename NumberTraits::ToInteger<B>::Type(b), typename NumberTraits::ToInteger<A>::Type(a));
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return std::lcm(
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typename NumberTraits::ToInteger<Result>::Type(a),
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typename NumberTraits::ToInteger<Result>::Type(b));
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}
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#if USE_EMBEDDED_COMPILER
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static constexpr bool compilable = false; /// exceptions (and a non-trivial algorithm)
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#endif
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};
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struct NameLCM { static constexpr auto name = "lcm"; };
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using FunctionLCM = FunctionBinaryArithmetic<LCMImpl, NameLCM, false>;
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void registerFunctionLCM(FunctionFactory & factory)
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{
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factory.registerFunction<FunctionLCM>();
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}
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}
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