Function end_send_group

sql/sql_select.cc:26181–26334

*/

enum_nested_loop_state
end_send_group(JOIN *join, JOIN_TAB *join_tab, bool end_of_records)
{
  int idx= -1;
  enum_nested_loop_state ok_code= NESTED_LOOP_OK;
  /*
    join_tab can be 0 in the case all tables are const tables and we did not
    need a temporary table to store the result.
    In this case we use the original given fields, which is stored in
    join->fields.
  */
  List<Item> *fields= join_tab ? (join_tab-1)->fields : join->fields;
  DBUG_ENTER("end_send_group");

  if (!join->items3.is_null() && join->current_ref_ptrs != join->items3)
    join->set_items_ref_array(join->items3);

  if (!join->first_record || end_of_records ||
      (idx=test_if_group_changed(join->group_fields)) >= 0)
  {

    if (!join->group_sent &&
        (join->first_record ||
         (end_of_records && !join->group && !join->group_optimized_away)))
    {
      table_map cleared_tables= (table_map) 0;
      if (join->procedure)
	join->procedure->end_group();
      /* Test if there was a group change. */
      if (idx < (int) join->send_group_parts)
      {
	int error=0;
	if (join->procedure)
	{
	  if (join->having && !join->having->val_bool())
	    error= -1;				// Didn't satisfy having
	  else
	  {
	    if (join->do_send_rows)
	      error=join->procedure->send_row(*fields) ? 1 : 0;
	    join->send_records++;
	  }
	  if (end_of_records && join->procedure->end_of_records())
	    error= 1;				// Fatal error
	}
	else
	{
          /* Reset all sum functions on group change. */
	  if (!join->first_record)
	  {
            /* No matching rows for group function */

            List_iterator_fast<Item> it(*fields);
            Item *item;
            join->no_rows_in_result_called= 1;

            join->clear(&cleared_tables);
            while ((item= it++))