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69 lines
1.5 KiB
C++
69 lines
1.5 KiB
C++
#pragma once
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#include <ostream>
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#include <Poco/SharedPtr.h>
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#include <DB/DataTypes/IDataType.h>
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namespace DB
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{
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using Poco::SharedPtr;
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class DataTypeFixedString : public IDataType
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{
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private:
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size_t n;
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public:
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DataTypeFixedString(size_t n_) : n(n_)
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{
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if (n == 0)
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throw Exception("FixedString size must be positive", ErrorCodes::ARGUMENT_OUT_OF_BOUND);
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}
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std::string getName() const
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{
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return "FixedString(" + toString(n) + ")";
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}
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DataTypePtr clone() const
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{
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return new DataTypeFixedString(n);
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}
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size_t getN() const
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{
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return n;
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}
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void serializeBinary(const Field & field, WriteBuffer & ostr) const;
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void deserializeBinary(Field & field, ReadBuffer & istr) const;
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void serializeBinary(const IColumn & column, WriteBuffer & ostr, size_t offset = 0, size_t limit = 0) const;
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void deserializeBinary(IColumn & column, ReadBuffer & istr, size_t limit, double avg_value_size_hint) const;
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void serializeText(const Field & field, WriteBuffer & ostr) const;
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void deserializeText(Field & field, ReadBuffer & istr) const;
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void serializeTextEscaped(const Field & field, WriteBuffer & ostr) const;
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void deserializeTextEscaped(Field & field, ReadBuffer & istr) const;
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void serializeTextQuoted(const Field & field, WriteBuffer & ostr) const;
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void deserializeTextQuoted(Field & field, ReadBuffer & istr) const;
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void serializeTextJSON(const Field & field, WriteBuffer & ostr) const;
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ColumnPtr createColumn() const;
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ColumnPtr createConstColumn(size_t size, const Field & field) const;
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Field getDefault() const
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{
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return String("");
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}
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};
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}
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