-- INSERT / UPDATE
declare
  dup_val_on_index  exception;
  except_02291  exception;

  pragma exception_init (dup_val_on_index  , -00001);
  pragma exception_init (except_02291  , -02291);
begin
  execute immediate '...';
  exception 
    when dup_val_on_index  then null;
    when except_02291  then null;
end;