Pode ser
select ...., to_lob(long_raw) from old_table (https://www.psoug.org/reference/convert_func.html )
ou
UTL_RAW.CAST_TO_VARCHAR2(b)
(https://www.dbasupport.com/forums/showthread.php? t=5342 ).
select ...., to_lob(long_raw) from old_table UTL_RAW.CAST_TO_VARCHAR2(b)
