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Better semantic of sharing columns: fixed error [#CLICKHOUSE-2].
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@ -29,10 +29,10 @@ class IColumn : public COWPtr<IColumn>
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private:
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friend class COWPtr<IColumn>;
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public:
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/// Creates the same column with the same data.
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virtual MutablePtr clone() const = 0;
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public:
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/// Name of a Column. It is used in info messages.
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virtual std::string getName() const { return getFamilyName(); };
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