presto-main/src/main/java/io/prestosql/type/IntervalDayTimeOperators.java/IntervalDayTimeOperators/castToSlice
class IntervalDayTimeOperators:    @ScalarOperator(CAST)
    @LiteralParameters("x")
    @SqlType("varchar(x)")
    public static Slice castToSlice(@SqlType(StandardTypes.INTERVAL_DAY_TO_SECOND) long value)
    {
        return utf8Slice(formatMillis(value));
    }