Class Sql_mode_dependency

sql/sql_mode.h:111–155

class Sql_mode_dependency A combination of hard and soft dependency on sql_mode. Used to watch if a GENERATED ALWAYS AS expression guarantees consistent data written to its virtual column. A virtual column can appear in an index if: - the generation expression does not depend on any sql_mode flags, or - the generation expression has a soft dependency on an sql_mode flag, and the

     therefore it's disallowed.
*/
class Sql_mode_dependency
{
  sql_mode_t m_hard;
  sql_mode_t m_soft;
public:
  Sql_mode_dependency()
   :m_hard(0), m_soft(0)
  { }
  Sql_mode_dependency(sql_mode_t hard, sql_mode_t soft)
   :m_hard(hard), m_soft(soft)
  { }
  sql_mode_t hard() const { return m_hard; }
  sql_mode_t soft() const { return m_soft; }
  operator bool () const
  {
    return m_hard > 0 || m_soft > 0;
  }
  Sql_mode_dependency operator|(const Sql_mode_dependency &other) const
  {
    return Sql_mode_dependency(m_hard | other.m_hard, m_soft | other.m_soft);
  }
  Sql_mode_dependency operator&(const Sql_mode_dependency &other) const
  {
    return Sql_mode_dependency(m_hard & other.m_hard, m_soft & other.m_soft);
  }
  Sql_mode_dependency &operator|=(const Sql_mode_dependency &other)
  {
    m_hard|= other.m_hard;
    m_soft|= other.m_soft;
    return *this;
  }
  Sql_mode_dependency &operator&=(const Sql_mode_dependency &other)
  {
    m_hard&= other.m_hard;
    m_soft&= other.m_soft;
    return *this;
  }
  Sql_mode_dependency &soft_to_hard()
  {
    m_hard|= m_soft;
    m_soft= 0;
    return *this;
  }
  void push_dependency_warnings(THD *thd) const;
};


#endif // SQL_MODE_H_INCLUDED