By default, the
ORACLE_LOADER access driver checks before opening data and log files to ensure that the directory being used is not a symbolic link. The
DISABLE_DIRECTORY_LINK_CHECK parameter (which takes no arguments) directs the access driver to bypass this check, allowing you to use files for which the parent directory may be a symbolic link.
Use of this parameter involves security risks because symbolic links can potentially be used to redirect the input/output of the external table load operation.