1 | #pragma once |
2 | |
3 | #include <ostream> |
4 | |
5 | #include <DataTypes/IDataType.h> |
6 | |
7 | |
8 | namespace DB |
9 | { |
10 | |
11 | class DataTypeString final : public IDataType |
12 | { |
13 | public: |
14 | using FieldType = String; |
15 | static constexpr bool is_parametric = false; |
16 | |
17 | DataTypeString(const String & type_name_ = "String" ) : type_name(type_name_) {} |
18 | |
19 | String doGetName() const override { return type_name; } |
20 | |
21 | const char * getFamilyName() const override |
22 | { |
23 | return "String" ; |
24 | } |
25 | |
26 | TypeIndex getTypeId() const override { return TypeIndex::String; } |
27 | |
28 | void serializeBinary(const Field & field, WriteBuffer & ostr) const override; |
29 | void deserializeBinary(Field & field, ReadBuffer & istr) const override; |
30 | void serializeBinary(const IColumn & column, size_t row_num, WriteBuffer & ostr) const override; |
31 | void deserializeBinary(IColumn & column, ReadBuffer & istr) const override; |
32 | |
33 | void serializeBinaryBulk(const IColumn & column, WriteBuffer & ostr, size_t offset, size_t limit) const override; |
34 | void deserializeBinaryBulk(IColumn & column, ReadBuffer & istr, size_t limit, double avg_value_size_hint) const override; |
35 | |
36 | void serializeText(const IColumn & column, size_t row_num, WriteBuffer & ostr, const FormatSettings &) const override; |
37 | void deserializeWholeText(IColumn & column, ReadBuffer & istr, const FormatSettings &) const override; |
38 | |
39 | void serializeTextEscaped(const IColumn & column, size_t row_num, WriteBuffer & ostr, const FormatSettings &) const override; |
40 | void deserializeTextEscaped(IColumn & column, ReadBuffer & istr, const FormatSettings &) const override; |
41 | |
42 | void serializeTextQuoted(const IColumn & column, size_t row_num, WriteBuffer & ostr, const FormatSettings &) const override; |
43 | void deserializeTextQuoted(IColumn & column, ReadBuffer & istr, const FormatSettings &) const override; |
44 | |
45 | void serializeTextJSON(const IColumn & column, size_t row_num, WriteBuffer & ostr, const FormatSettings &) const override; |
46 | void deserializeTextJSON(IColumn & column, ReadBuffer & istr, const FormatSettings &) const override; |
47 | |
48 | void serializeTextXML(const IColumn & column, size_t row_num, WriteBuffer & ostr, const FormatSettings &) const override; |
49 | |
50 | void serializeTextCSV(const IColumn & column, size_t row_num, WriteBuffer & ostr, const FormatSettings &) const override; |
51 | void deserializeTextCSV(IColumn & column, ReadBuffer & istr, const FormatSettings &) const override; |
52 | |
53 | void serializeProtobuf(const IColumn & column, size_t row_num, ProtobufWriter & protobuf, size_t & value_index) const override; |
54 | void deserializeProtobuf(IColumn & column, ProtobufReader & protobuf, bool allow_add_row, bool & row_added) const override; |
55 | |
56 | MutableColumnPtr createColumn() const override; |
57 | |
58 | Field getDefault() const override; |
59 | |
60 | bool equals(const IDataType & rhs) const override; |
61 | |
62 | bool isParametric() const override { return false; } |
63 | bool haveSubtypes() const override { return false; } |
64 | bool isComparable() const override { return true; } |
65 | bool canBeComparedWithCollation() const override { return true; } |
66 | bool isValueUnambiguouslyRepresentedInContiguousMemoryRegion() const override { return true; } |
67 | bool isCategorial() const override { return true; } |
68 | bool canBeInsideNullable() const override { return true; } |
69 | bool canBeInsideLowCardinality() const override { return true; } |
70 | |
71 | private: |
72 | const String type_name; |
73 | }; |
74 | |
75 | } |
76 | |