| 30 | |
| 31 | |
| 32 | class DataTypeArray final : public IDataType |
| 33 | { |
| 34 | private: |
| 35 | /// The type of array elements. |
| 36 | DataTypePtr nested; |
| 37 | |
| 38 | public: |
| 39 | static constexpr bool is_parametric = true; |
| 40 | |
| 41 | DataTypeArray(const DataTypePtr & nested_); |
| 42 | |
| 43 | TypeIndex getTypeId() const override { return TypeIndex::Array; } |
| 44 | |
| 45 | std::string doGetName() const override |
| 46 | { |
| 47 | return "Array(" + nested->getName() + ")"; |
| 48 | } |
| 49 | |
| 50 | const char * getFamilyName() const override |
| 51 | { |
| 52 | return "Array"; |
| 53 | } |
| 54 | |
| 55 | /// Map support array key |
| 56 | bool canBeInsideNullable() const override |
| 57 | { |
| 58 | return true; |
| 59 | } |
| 60 | |
| 61 | MutableColumnPtr createColumn() const override; |
| 62 | |
| 63 | Field getDefault() const override; |
| 64 | |
| 65 | bool equals(const IDataType & rhs) const override; |
| 66 | |
| 67 | bool isParametric() const override { return true; } |
| 68 | bool haveSubtypes() const override { return true; } |
| 69 | bool cannotBeStoredInTables() const override { return nested->cannotBeStoredInTables(); } |
| 70 | bool textCanContainOnlyValidUTF8() const override { return nested->textCanContainOnlyValidUTF8(); } |
| 71 | bool isComparable() const override { return nested->isComparable(); } |
| 72 | bool canBeComparedWithCollation() const override { return nested->canBeComparedWithCollation(); } |
| 73 | |
| 74 | bool isValueUnambiguouslyRepresentedInContiguousMemoryRegion() const override |
| 75 | { |
| 76 | return nested->isValueUnambiguouslyRepresentedInFixedSizeContiguousMemoryRegion(); |
| 77 | } |
| 78 | |
| 79 | DataTypePtr tryGetSubcolumnType(const String & subcolumn_name) const override; |
| 80 | ColumnPtr getSubcolumn(const String & subcolumn_name, const IColumn & column) const override; |
| 81 | // SerializationPtr getSubcolumnSerialization( |
| 82 | // const String & subcolumn_name, const BaseSerializationGetter & base_serialization_getter) const override; |
| 83 | |
| 84 | SerializationPtr doGetDefaultSerialization() const override; |
| 85 | |
| 86 | const DataTypePtr & getNestedType() const { return nested; } |
| 87 | |
| 88 | /// 1 for plain array, 2 for array of arrays and so on. |
| 89 | size_t getNumberOfDimensions() const; |