Files Created During the Unload Database Operation
When you unload a database, several files are created. To ensure compatibility across all systems, the names of the generated files are truncated to twelve characters.
The generated files are as follows:
unload
Contains operating system commands to invoke a terminal monitor and execute the copy.out script
copy.out
Contains COPY statements to copy out system catalogs and all user objects
reload
Contains operating system commands to invoke a terminal monitor and execute the copy.in script
copy.in
Contains statements to destroy, create and copy in system catalogs and all user objects
The unload and reload command files have the .bat extension on Windows systems and the .ing extension on UNIX and VMS systems.