ora-lob-file-get-name returns as multiple values the directory alias dir and the filename filename associated with the LOB denoted by lob-locator. The function is applicable only to file LOBs (CFILE or BFILE).
If an error occurs and errorp is true, an error is signaled. If errorp is false, the function returns an object of type sql-database-error. The default value of errorp is
ora-lob-file-get-nameis available only when the "oracle" module is loaded. See the section Oracle LOB interface for more information.
LispWorks User Guide and Reference Manual - 20 Sep 2017