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