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97f2a2213e
* Move some code outside dbms/src folder * Fix paths
65 lines
3.1 KiB
C++
65 lines
3.1 KiB
C++
#pragma once
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#include <DataTypes/IDataType.h>
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#include <DataTypes/DataTypeWithSimpleSerialization.h>
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namespace DB
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{
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template <typename T>
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class ColumnVector;
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/** Implements part of the IDataType interface, common to all numbers and for Date and DateTime.
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*/
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template <typename T>
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class DataTypeNumberBase : public DataTypeWithSimpleSerialization
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{
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static_assert(IsNumber<T>);
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public:
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static constexpr bool is_parametric = false;
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using FieldType = T;
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using ColumnType = ColumnVector<T>;
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const char * getFamilyName() const override { return TypeName<T>::get(); }
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TypeIndex getTypeId() const override { return TypeId<T>::value; }
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void serializeText(const IColumn & column, size_t row_num, WriteBuffer & ostr, const FormatSettings &) const override;
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void deserializeText(IColumn & column, ReadBuffer & istr, const FormatSettings & settings) const override;
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void serializeTextJSON(const IColumn & column, size_t row_num, WriteBuffer & ostr, const FormatSettings & settings) const override;
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void deserializeTextJSON(IColumn & column, ReadBuffer & istr, const FormatSettings &) const override;
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void deserializeTextCSV(IColumn & column, ReadBuffer & istr, const FormatSettings & settings) const override;
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Field getDefault() const override;
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/** Format is platform-dependent. */
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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 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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bool isParametric() const override { return false; }
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bool haveSubtypes() const override { return false; }
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bool shouldAlignRightInPrettyFormats() const override { return true; }
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bool textCanContainOnlyValidUTF8() const override { return true; }
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bool isComparable() const override { return true; }
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bool isValueRepresentedByNumber() const override { return true; }
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bool isValueRepresentedByInteger() const override;
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bool isValueRepresentedByUnsignedInteger() const override;
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bool isValueUnambiguouslyRepresentedInContiguousMemoryRegion() const override { return true; }
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bool haveMaximumSizeOfValue() const override { return true; }
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size_t getSizeOfValueInMemory() const override { return sizeof(T); }
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bool isCategorial() const override { return isValueRepresentedByInteger(); }
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bool canBeInsideLowCardinality() const override { return true; }
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};
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}
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