presto-main/src/main/java/io/prestosql/operator/scalar/JsonOperators.java/JsonOperators/castFromTinyInt
class JsonOperators:    @ScalarOperator(CAST)
    @SqlType(JSON)
    public static Slice castFromTinyInt(@SqlType(TINYINT) long value)
    {
        return internalCastFromLong(value, 4);
    }