presto-main/src/main/java/io/prestosql/type/TinyintOperators.java/TinyintOperators/hashCode
class TinyintOperators:    @ScalarOperator(HASH_CODE)
    @SqlType(StandardTypes.BIGINT)
    public static long hashCode(@SqlType(StandardTypes.TINYINT) long value)
    {
        return TinyintType.hash((byte) value);
    }