DBA Tips Archive for Oracle
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by Michael New, MichaelNew@earthlink.net, Gradation LLC
Starting with Oracle9i Release 2, the UTL_FILE_DIR init.ora parameter can be made obsolete.
Each directory to be accessed by
UTL_FILE must be listed (comma separated)
UTL_FILE_DIR init.ora parameter. This cannot be done with
(ORA-02095) - you have to bounce the database. The directory must be explicitly
specified again in
UTL_FILE.FOPEN. And the number of directories that can be
listed is limited by the 255 character buffer size.
Each directory to be accessed by
UTL_FILE can be specified via the
CREATE DIRECTORY command. And specified via this level of indirection in
It is the responsibility of the system and database administrators to implement
appropriate file and directory security on the database host.
won't attempt to check for permission before executing an open/read/write/delete request.
We expect that the operating system will deny the request where appropriate.
UTL_FILE will blindly issue any action requested and look for
success or failure return status from the operating system.
will have no file access because it will have no directory access, until granted access by
CREATE DIRECTORY by SYS or SYSTEM or a user with DBA privileges. Since
access privileges are granted on a per directory basis, the DBA can control
directory access by either:
Jeffrey Hunter is an Oracle Certified Professional, Java Development Certified Professional, Author, and an Oracle ACE. Jeff currently works as a Senior Database Administrator for The DBA Zone, Inc. located in Pittsburgh, Pennsylvania. His work includes advanced performance tuning, Java and PL/SQL programming, developing high availability solutions, capacity planning, database security, and physical / logical database design in a UNIX / Linux server environment. Jeff's other interests include mathematical encryption theory, tutoring advanced mathematics, programming language processors (compilers and interpreters) in Java and C, LDAP, writing web-based database administration tools, and of course Linux. He has been a Sr. Database Administrator and Software Engineer for over 20 years and maintains his own website site at: http://www.iDevelopment.info. Jeff graduated from Stanislaus State University in Turlock, California, with a Bachelor's degree in Computer Science and Mathematics.
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Last modified on
Friday, 17-Sep-2010 21:06:56 EDT
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