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#pragma once
#include <Columns/IColumnDummy.h>
namespace DB
{
class ColumnNothing final : public COWHelper<IColumnDummy, ColumnNothing>
{
private:
friend class COWHelper<IColumnDummy, ColumnNothing>;
explicit ColumnNothing(size_t s_)
{
s = s_;
}
ColumnNothing(const ColumnNothing &) = default;
public:
const char * getFamilyName() const override { return "Nothing"; }
MutableColumnPtr cloneDummy(size_t s_) const override { return ColumnNothing::create(s_); }
TypeIndex getDataType() const override { return TypeIndex::Nothing; }
bool canBeInsideNullable() const override { return true; }
bool structureEquals(const IColumn & rhs) const override
{
return typeid(rhs) == typeid(ColumnNothing);
}
};
}
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