Upgraded to SQL Developer 17.2 on Windows this past week. Exporting of RAW columns appears to now be broken from 4.1.5.21.78.
In 4.1.5.21.78, the query runs fine (just a straight SELECT column FROM table), and exporting to a pipe delimited file without quotes yields the RAW values as I see them in the query result (32-character GUID values, numbers and letters).
In 17.2, the query also runs fine, but the same export shows the RAW field as a garbled string of 9-10 characters, e.g. [B@bbac16, which is not what is displayed in the query result (a full 32 characters).
I was able to workaround the issue by using CAST(column AS VARCHAR2(100)) and THAT exports as expected to a text file.
I just wanted to report this as a possible bug in 17.2 and the way it handles exporting RAW columns to text files.