Using this variable, set the case of the indexed file filenames in your destination directory. On Windows by default, the filenames are recognized in either upper, lower, or mixed case.
If you set FILE_CASE to Upper, you can access only files that are named in uppercase letters. In the reverse, if you set FILE_CASE to Lower, you can access only files that are named in lowercase letters.
The following table shows the files you would find depending on the FILE_CASE:
The name of the file is stored in the system catalog at the time it is loaded using either xdbcutil or addfile.