CDatabaseMysql::DatetimeToTimestampFunction

public function DatetimeToTimestampFunction($fieldName)
{
	$timeZone = "";
	if (CTimeZone::Enabled())
	{
		static $diff = false;
		if ($diff === false)
		{
			$diff = CTimeZone::GetOffset();
		}

		if ($diff <> 0)
		{
			$timeZone = $diff > 0 ? "+" . $diff : $diff;
		}
	}
	return "UNIX_TIMESTAMP(" . $fieldName . ")" . $timeZone;
}