1#pragma once
2
3#include <DataTypes/IDataType.h>
4#include <DataTypes/DataTypeWithSimpleSerialization.h>
5
6
7namespace DB
8{
9
10template <typename T>
11class ColumnVector;
12
13/** Implements part of the IDataType interface, common to all numbers and for Date and DateTime.
14 */
15template <typename T>
16class DataTypeNumberBase : public DataTypeWithSimpleSerialization
17{
18 static_assert(IsNumber<T>);
19
20public:
21 static constexpr bool is_parametric = false;
22 using FieldType = T;
23
24 using ColumnType = ColumnVector<T>;
25
26 const char * getFamilyName() const override { return TypeName<T>::get(); }
27 TypeIndex getTypeId() const override { return TypeId<T>::value; }
28
29 void serializeText(const IColumn & column, size_t row_num, WriteBuffer & ostr, const FormatSettings &) const override;
30 void deserializeText(IColumn & column, ReadBuffer & istr, const FormatSettings & settings) const override;
31 void serializeTextJSON(const IColumn & column, size_t row_num, WriteBuffer & ostr, const FormatSettings & settings) const override;
32 void deserializeTextJSON(IColumn & column, ReadBuffer & istr, const FormatSettings &) const override;
33 void deserializeTextCSV(IColumn & column, ReadBuffer & istr, const FormatSettings & settings) const override;
34 Field getDefault() const override;
35
36 /** Format is platform-dependent. */
37 void serializeBinary(const Field & field, WriteBuffer & ostr) const override;
38 void deserializeBinary(Field & field, ReadBuffer & istr) const override;
39 void serializeBinary(const IColumn & column, size_t row_num, WriteBuffer & ostr) const override;
40 void deserializeBinary(IColumn & column, ReadBuffer & istr) const override;
41 void serializeBinaryBulk(const IColumn & column, WriteBuffer & ostr, size_t offset, size_t limit) const override;
42 void deserializeBinaryBulk(IColumn & column, ReadBuffer & istr, size_t limit, double avg_value_size_hint) const override;
43
44 void serializeProtobuf(const IColumn & column, size_t row_num, ProtobufWriter & protobuf, size_t & value_index) const override;
45 void deserializeProtobuf(IColumn & column, ProtobufReader & protobuf, bool allow_add_row, bool & row_added) const override;
46
47 MutableColumnPtr createColumn() const override;
48
49 bool isParametric() const override { return false; }
50 bool haveSubtypes() const override { return false; }
51 bool shouldAlignRightInPrettyFormats() const override { return true; }
52 bool textCanContainOnlyValidUTF8() const override { return true; }
53 bool isComparable() const override { return true; }
54 bool isValueRepresentedByNumber() const override { return true; }
55 bool isValueRepresentedByInteger() const override;
56 bool isValueRepresentedByUnsignedInteger() const override;
57 bool isValueUnambiguouslyRepresentedInContiguousMemoryRegion() const override { return true; }
58 bool haveMaximumSizeOfValue() const override { return true; }
59 size_t getSizeOfValueInMemory() const override { return sizeof(T); }
60 bool isCategorial() const override { return isValueRepresentedByInteger(); }
61 bool canBeInsideLowCardinality() const override { return true; }
62};
63
64}
65