my_time_t Field_timestamp_hires::get_timestamp(const uchar *pos,
                                               ulong *sec_part) const
{
  ASSERT_COLUMN_MARKED_FOR_READ;
  *sec_part= (long)sec_part_unshift(read_bigendian(pos+4, sec_part_bytes(dec)), dec);
  return mi_uint4korr(pos);
}
my_time_t Field_timestamp_hires::get_timestamp(const uchar *pos,
                                               ulong *sec_part) const
{
  ASSERT_COLUMN_MARKED_FOR_READ;
  *sec_part= (long)sec_part_unshift(read_bigendian(pos+4, sec_part_bytes(dec)), dec);
  return mi_uint4korr(pos);
}