{

DataTypeNumber() = default;

bool equals(const IDataType & rhs) const override { return typeid(rhs) == typeid(*this); }

bool canBeUsedAsVersion() const override { return true; }

bool isSummable() const override { return true; }

bool canBeUsedInBitOperations() const override { return true; }

bool canBeUsedInBooleanContext() const override { return true; }

bool canBeInsideNullable() const override { return true; }

bool canBePromoted() const override { return true; }

DataTypePtr promoteNumericType() const override

{

using PromotedType = DataTypeNumber<NearestFieldType<T>>;

return std::make_shared<PromotedType>();

}

SerializationPtr doGetDefaultSerialization() const override

{

return std::make_shared<SerializationNumber<T>>();

}

/// Special constructor for unsigned integers that can also fit into signed integer.

/// It's used for better type inference from fields.

/// See getLeastSupertype.cpp::convertUInt64toInt64IfPossible and FieldToDataType.cpp

explicit DataTypeNumber(bool unsigned_can_be_signed_) : DataTypeNumberBase<T>(), unsigned_can_be_signed(unsigned_can_be_signed_)

{

if constexpr (std::is_signed_v<T>)

throw Exception(ErrorCodes::LOGICAL_ERROR, "DataTypeNumber constructor with bool argument should not be used with signed integers");

}

bool canUnsignedBeSigned() const { return unsigned_can_be_signed; }

bool unsigned_can_be_signed = false;