presto-main/src/main/java/io/prestosql/type/DateTimeOperators.java/DateTimeOperators/intervalYearToMonthPlusTimestampWithTimeZone
class DateTimeOperators:    @ScalarOperator(ADD)
    @SqlType(StandardTypes.TIMESTAMP_WITH_TIME_ZONE)
    public static long intervalYearToMonthPlusTimestampWithTimeZone(@SqlType(StandardTypes.INTERVAL_YEAR_TO_MONTH) long left, @SqlType(StandardTypes.TIMESTAMP_WITH_TIME_ZONE) long right)
    {
        return updateMillisUtc(unpackChronology(right).monthOfYear().add(unpackMillisUtc(right), left), right);
    }