presto-main/src/main/java/io/prestosql/operator/scalar/DateTimeFunctions.java/DateTimeFunctions/toMilliseconds
class DateTimeFunctions:    @ScalarFunction("to_milliseconds")
    @SqlType(StandardTypes.BIGINT)
    public static long toMilliseconds(@SqlType(StandardTypes.INTERVAL_DAY_TO_SECOND) long value)
    {
        return value;
    }