Method parsed_select_expr_cont

sql/sql_lex.cc:11671–11709

SELECT_LEX_UNIT *LEX::parsed_select_expr_cont(SELECT_LEX_UNIT *unit,
                                              SELECT_LEX *s2,
                                              enum sub_select_type unit_type,
                                              bool distinct, bool oracle)
{
  DBUG_ASSERT(!s2->next_select());
  SELECT_LEX *sel1= s2;
  SELECT_LEX *last= unit->pre_last_parse->next_select();

  int cmp= oracle? 0 : cmp_unit_op(unit_type, last->get_linkage());
  if (cmp == 0)
  {
    sel1->first_nested= last->first_nested;
  }
  else if (cmp > 0)
  {
    last->first_nested= unit->pre_last_parse;
    sel1->first_nested= last;
  }
  else /* cmp < 0 */
  {
    SELECT_LEX *first_in_nest= last->first_nested;
    if (first_in_nest->first_nested != first_in_nest)
    {
      /* There is a priority jump starting from first_in_nest */
      if ((last= create_priority_nest(first_in_nest,
                                      first_in_nest->first_nested)) == NULL)
        return NULL;
      unit->fix_distinct();
    }
    sel1->first_nested= last->first_nested;
  }
  last->link_neighbour(sel1);
  sel1->set_master_unit(unit);
  unit->uncacheable|= sel1->uncacheable;
  sel1->set_linkage_and_distinct(unit_type, distinct);
  unit->pre_last_parse= last;
  return unit;
}


/**