ClickHouse/dbms/src/Functions/e.cpp

#include <Functions/FunctionFactory.h>
#include <Functions/FunctionMathConstFloat64.h>

namespace DB
{

struct EImpl
{
    static constexpr auto name = "e";
    static constexpr double value = 2.7182818284590452353602874713526624977572470;
};

using FunctionE = FunctionMathConstFloat64<EImpl>;

void registerFunctionE(FunctionFactory & factory)
{
    factory.registerFunction<FunctionE>();
}

}