Method reinit_exec_mechanism

sql/sql_union.cc:2838–2844

void st_select_lex_unit::reinit_exec_mechanism()
{
  prepared= optimized= optimized_2= executed= 0;
  optimize_started= 0;
  if (with_element && with_element->is_recursive)
    with_element->reset_recursive_for_exec();
}


/**