ClickHouse/dbms/include/DB/Columns/ColumnNullable.h

62 lines
2.2 KiB
C++

#pragma once
#include <DB/Columns/IColumn.h>
#include <DB/Columns/ColumnsNumber.h>
namespace DB
{
class ColumnNullable final : public IColumn
{
public:
ColumnNullable(ColumnPtr nested_column_, bool fill_with_nulls = false);
std::string getName() const override;
bool isNumeric() const override;
bool isConst() const override;
bool isFixed() const override;
bool isNullable() const override;
size_t sizeOfField() const override;
ColumnPtr cloneResized(size_t size) const override;
ColumnPtr cloneEmpty() const override;
size_t size() const override;
bool isNullAt(size_t n) const;
Field operator[](size_t n) const override;
void get(size_t n, Field & res) const override;
UInt64 get64(size_t n) const override;
StringRef getDataAt(size_t n) const override;
void insertData(const char * pos, size_t length) override;
StringRef serializeValueIntoArena(size_t n, Arena & arena, char const *& begin) const override;
const char * deserializeAndInsertFromArena(const char * pos) override;
void insertRangeFrom(const IColumn & src, size_t start, size_t length) override;;
void insert(const Field & x) override;
void insertDefault() override;
void popBack(size_t n) override;
ColumnPtr filter(const Filter & filt, ssize_t result_size_hint) const override;
ColumnPtr permute(const Permutation & perm, size_t limit) const override;
int compareAt(size_t n, size_t m, const IColumn & rhs_, int nan_direction_hint) const override;
void getPermutation(bool reverse, size_t limit, Permutation & res) const override;
void reserve(size_t n) override;
size_t byteSize() const override;
ColumnPtr replicate(const Offsets_t & replicate_offsets) const override;
ColumnPtr convertToFullColumnIfConst() const override;
void updateHashWithValue(size_t n, SipHash & hash) const override;
ColumnPtr & getNestedColumn();
const ColumnPtr & getNestedColumn() const;
ColumnPtr & getNullValuesByteMap();
const ColumnPtr & getNullValuesByteMap() const;
void updateNullValuesByteMap(const ColumnNullable & other);
private:
void getExtremesImpl(Field & min, Field & max, const NullValuesByteMap * null_map_) const override;
ColumnUInt8 & getNullMapContent();
const ColumnUInt8 & getNullMapContent() const;
private:
ColumnPtr nested_column;
ColumnPtr null_map;
};
}