Function hasNullData

src/include/storage/table/column_chunk_data.h:136–136

    virtual bool isNull(common::offset_t pos) const;
    void setNullData(std::unique_ptr<NullChunkData> nullData_);
    bool hasNullData() const { return nullData != nullptr; }
    NullChunkData* getNullData() { return nullData.get(); }
    const NullChunkData* getNullData() const { return nullData.get(); }
    std::optional<common::NullMask> getNullMask() const;