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ORACLE_HOME with symbolic link and postupgrade_fixups

By Franck Pachot

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Here is a quick post you may google into if you got the following error when running postupgrade_fixups.sql after an upgrade:

ERROR - Cannot open the preupgrade_messages.properties file from the directory object preupgrade_dir
DECLARE
*
ERROR at line 1:
ORA-29283: invalid file operation
ORA-06512: at "SYS.DBMS_PREUP", line 3300
ORA-06512: at "SYS.UTL_FILE", line 536
ORA-29283: invalid file operation
ORA-06512: at "SYS.UTL_FILE", line 41
ORA-06512: at "SYS.UTL_FILE", line 478
ORA-06512: at "SYS.DBMS_PREUP", line 3260
ORA-06512: at "SYS.DBMS_PREUP", line 9739
ORA-06512: at line 11

UTL_FILE_DIR and 18c

I wrote a blog post called The Death of UTL_FILE which attracted a comment from a reader:

“There is NO chance to stay at UTL_FILE as it is DESUPPORTED starting with database Version 18c”

This is not the case, but since I wanted to clarify what has changed in 18c, it warrants this small but separate blog post. When UTL_FILE first into existence in Oracle 7, the concept of directory object did not apply to UTL_FILE. Clearly we could not just let UTL_FILE to write to any destination, otherwise a malicious person could write a little PL/SQL block like this:

The death of UTL_FILE

In a previous post I covered a technique to improve the performance of UTL_FILE, but concluded the post with a teaser: “you probably don’t need to use UTL_FILE ever again”.

image

Time for me to back that statement up with some concrete evidence.

UTL_FILE can read and write files. This blog post will cover the writing functionality of UTL_FILE and why I think you probably don’t need UTL_FILE for this. I’ll come back to UTL_FILE to read files in a future post.

Juicing up UTL_FILE

Think about your rubbish bin for a second. Because, clearly this is going to be an oh so obvious metaphor leading into UTL_FILE right?  OK, maybe a little explanation is needed. I have a basket next to my desk into which I throw any waste paper. It is where I throw my stupid ideas and broken dreams Smile