Method first_select

sql/sql_lex.h:610–613

  st_select_lex_unit* master_unit();
  st_select_lex* outer_select();
  st_select_lex* first_select()
  {
    return reinterpret_cast<st_select_lex*>(slave);
  }
  st_select_lex_unit* next_unit()
  {
    return reinterpret_cast<st_select_lex_unit*>(next);