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91 lines
3.8 KiB
C++
91 lines
3.8 KiB
C++
#pragma once
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#include <DataTypes/IDataType.h>
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#define MAX_FIXEDSTRING_SIZE 0xFFFFFF
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namespace DB
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{
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namespace ErrorCodes
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{
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extern const int ARGUMENT_OUT_OF_BOUND;
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}
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class DataTypeFixedString final : 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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static constexpr bool is_parametric = true;
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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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if (n > MAX_FIXEDSTRING_SIZE)
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throw Exception("FixedString size is too large", ErrorCodes::ARGUMENT_OUT_OF_BOUND);
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}
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std::string doGetName() const override;
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TypeIndex getTypeId() const override { return TypeIndex::FixedString; }
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const char * getFamilyName() const override { return "FixedString"; }
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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 override;
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void deserializeBinary(Field & field, ReadBuffer & istr) const override;
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void serializeBinary(const IColumn & column, size_t row_num, WriteBuffer & ostr) const override;
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void deserializeBinary(IColumn & column, ReadBuffer & istr) const override;
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void serializeBinaryBulk(const IColumn & column, WriteBuffer & ostr, size_t offset, size_t limit) const override;
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void deserializeBinaryBulk(IColumn & column, ReadBuffer & istr, size_t limit, double avg_value_size_hint) const override;
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void serializeText(const IColumn & column, size_t row_num, WriteBuffer & ostr, const FormatSettings &) const override;
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void deserializeWholeText(IColumn & column, ReadBuffer & istr, const FormatSettings &) const override;
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void serializeTextEscaped(const IColumn & column, size_t row_num, WriteBuffer & ostr, const FormatSettings &) const override;
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void deserializeTextEscaped(IColumn & column, ReadBuffer & istr, const FormatSettings &) const override;
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void serializeTextQuoted(const IColumn & column, size_t row_num, WriteBuffer & ostr, const FormatSettings &) const override;
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void deserializeTextQuoted(IColumn & column, ReadBuffer & istr, const FormatSettings &) const override;
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void serializeTextJSON(const IColumn & column, size_t row_num, WriteBuffer & ostr, const FormatSettings &) const override;
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void deserializeTextJSON(IColumn & column, ReadBuffer & istr, const FormatSettings &) const override;
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void serializeTextXML(const IColumn & column, size_t row_num, WriteBuffer & ostr, const FormatSettings &) const override;
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void serializeTextCSV(const IColumn & column, size_t row_num, WriteBuffer & ostr, const FormatSettings &) const override;
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void deserializeTextCSV(IColumn & column, ReadBuffer & istr, const FormatSettings &) const override;
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void serializeProtobuf(const IColumn & column, size_t row_num, ProtobufWriter & protobuf, size_t & value_index) const override;
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void deserializeProtobuf(IColumn & column, ProtobufReader & protobuf, bool allow_add_row, bool & row_added) const override;
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MutableColumnPtr createColumn() const override;
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Field getDefault() const override;
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bool equals(const IDataType & rhs) const override;
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bool isParametric() const override { return true; }
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bool haveSubtypes() const override { return false; }
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bool isComparable() const override { return true; }
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bool isValueUnambiguouslyRepresentedInContiguousMemoryRegion() const override { return true; }
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bool isValueUnambiguouslyRepresentedInFixedSizeContiguousMemoryRegion() const override { return true; }
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bool haveMaximumSizeOfValue() const override { return true; }
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size_t getSizeOfValueInMemory() const override { return n; }
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bool isCategorial() const override { return true; }
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bool canBeInsideNullable() const override { return true; }
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bool canBeInsideLowCardinality() const override { return true; }
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};
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}
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