Method nullable

sql/sql_i_s.h:115–115

  { }
  const Lex_ident_column &name() const { return m_name; }
  bool nullable() const { return m_nullability == NULLABLE; }
  const Lex_ident_column &old_name() const { return m_old_name; }
  enum_show_open_table open_method() const { return  m_open_method; }
  bool end_marker() const { return m_name.str == NULL; }