#pragma once #include #include namespace DB { class DataTypeString final : public IDataType { public: using FieldType = String; static constexpr bool is_parametric = false; const char * getFamilyName() const override { return "String"; } TypeIndex getTypeId() const override { return TypeIndex::String; } void serializeBinary(const Field & field, WriteBuffer & ostr) const override; void deserializeBinary(Field & field, ReadBuffer & istr) const override; void serializeBinary(const IColumn & column, size_t row_num, WriteBuffer & ostr) const override; void deserializeBinary(IColumn & column, ReadBuffer & istr) const override; void serializeBinaryBulk(const IColumn & column, WriteBuffer & ostr, size_t offset, size_t limit) const override; void deserializeBinaryBulk(IColumn & column, ReadBuffer & istr, size_t limit, double avg_value_size_hint) const override; void serializeText(const IColumn & column, size_t row_num, WriteBuffer & ostr, const FormatSettings &) const override; void serializeTextEscaped(const IColumn & column, size_t row_num, WriteBuffer & ostr, const FormatSettings &) const override; void deserializeTextEscaped(IColumn & column, ReadBuffer & istr, const FormatSettings &) const override; void serializeTextQuoted(const IColumn & column, size_t row_num, WriteBuffer & ostr, const FormatSettings &) const override; void deserializeTextQuoted(IColumn & column, ReadBuffer & istr, const FormatSettings &) const override; void serializeTextJSON(const IColumn & column, size_t row_num, WriteBuffer & ostr, const FormatSettings &) const override; void deserializeTextJSON(IColumn & column, ReadBuffer & istr, const FormatSettings &) const override; void serializeTextXML(const IColumn & column, size_t row_num, WriteBuffer & ostr, const FormatSettings &) const override; void serializeTextCSV(const IColumn & column, size_t row_num, WriteBuffer & ostr, const FormatSettings &) const override; void deserializeTextCSV(IColumn & column, ReadBuffer & istr, const FormatSettings &) const override; void serializeProtobuf(const IColumn & column, size_t row_num, ProtobufWriter & protobuf, size_t & value_index) const override; void deserializeProtobuf(IColumn & column, ProtobufReader & protobuf, bool allow_add_row, bool & row_added) const override; MutableColumnPtr createColumn() const override; Field getDefault() const override { return String(); } bool equals(const IDataType & rhs) const override; bool isParametric() const override { return false; } bool haveSubtypes() const override { return false; } bool isComparable() const override { return true; } bool canBeComparedWithCollation() const override { return true; } bool isValueUnambiguouslyRepresentedInContiguousMemoryRegion() const override { return true; } bool isCategorial() const override { return true; } bool canBeInsideNullable() const override { return true; } bool canBeInsideLowCardinality() const override { return true; } }; }