ClickHouse

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#include <Functions/FunctionFactory.h>
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#include <Functions/FunctionUnaryArithmetic.h>
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#include <DataTypes/NumberTraits.h>
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namespace DB
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{
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template <typename A>
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struct NegateImpl
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{
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    using ResultType = std::conditional_t<is_decimal<A>, A, typename NumberTraits::ResultOfNegate<A>::Type>;
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    static constexpr const bool allow_string_or_fixed_string = false;
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    static inline NO_SANITIZE_UNDEFINED ResultType apply(A a)
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    {
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        return -static_cast<ResultType>(a);
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    }
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#if USE_EMBEDDED_COMPILER
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    static constexpr bool compilable = true;
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    static inline llvm::Value * compile(llvm::IRBuilder<> & b, llvm::Value * arg, bool)
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    {
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        return arg->getType()->isIntegerTy() ? b.CreateNeg(arg) : b.CreateFNeg(arg);
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    }
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#endif
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};
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struct NameNegate { static constexpr auto name = "negate"; };
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using FunctionNegate = FunctionUnaryArithmetic<NegateImpl, NameNegate, true>;
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template <> struct FunctionUnaryArithmeticMonotonicity<NameNegate>
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{
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    static bool has() { return true; }
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    static IFunction::Monotonicity get(const Field &, const Field &)
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    {
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        return { .is_monotonic = true, .is_positive = false, .is_strict = true };
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    }
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};
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REGISTER_FUNCTION(Negate)
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{
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    factory.registerFunction<FunctionNegate>();
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}
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}
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