490
490
save_read_set= sort_form->read_set;
491
491
save_write_set= sort_form->write_set;
492
492
/* Set up temporary column read map for columns used by sort */
494
494
/* Temporary set for register_used_fields and register_field_in_read_map */
495
495
sort_form->read_set= &sort_form->tmp_set;
496
496
register_used_fields(param);