?
Solved

A UNIQUE TRIGGER ON TWO COLUMNS - ORACLE PL/SQL PROGRAMMING

Posted on 2008-10-13
3
Medium Priority
?
966 Views
Last Modified: 2013-12-18
Good evening!
In a table called NEREPSTA_CONFIG, I have a column called REPSTA_SFTP_PASSWORD (type VARCHAR2), on which I've built the following trigger:
CREATE OR REPLACE TRIGGER MASTER.REPSTA_SOURCE
BEFORE INSERT OR UPDATE
OF REPSTA_SFTP_PASSWORD
ON MASTER.NEREPSTA_CONFIG
REFERENCING NEW AS NEW OLD AS OLD
FOR EACH ROW
BEGIN
   :NEW.repsta_sftp_password := cripta (:NEW.repsta_sftp_password);
END;
/

So, when a new record is inserted, on commit the NEREPSTA_SFTP_PASSWORD column is encrypted with che "CRIPTA" function.  Moreover, when the field NEREPSTA_SFTP_PASSWORD is updated, on commit it's encrypted with the same "CRIPTA" function.
Now please suppose to ALTER the NEREPSTA_CONFIG table, adding a new column called NGNEER_SFTP_PASSWORD: I would like to modify the trigger in order to use the CRIPTA stored function ONLY on the field updated or inserted, not on both fields inconditionally: only the modified field has to be cripted with the CRIPTA function.  Of course, if you INSERT a NEW record, both the fields NEREPSTA_SFTP_PASSWORD and NGNEER_SFTP_PASSWORD has to be crypted.

Any clues??
0
Comment
Question by:CRISTIANO_CORRADI
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
3 Comments
 
LVL 29

Accepted Solution

by:
MikeOM_DBA earned 2000 total points
ID: 22703764

Try this:

CREATE OR REPLACE TRIGGER MASTER.REPSTA_SOURCE
BEFORE INSERT OR UPDATE
OF REPSTA_SFTP_PASSWORD, NGNEER_SFTP_PASSWORD
ON MASTER.NEREPSTA_CONFIG
REFERENCING NEW AS NEW OLD AS OLD
FOR EACH ROW
BEGIN
  IF INSERTING THEN
   :NEW.repsta_sftp_password := cripta (:NEW.repsta_sftp_password);
   :NEW.ngneer_sftp_password := cripta (:NEW.ngneer_sftp_password);
  ELSE
    IF UPDATING('REPSTA_SFTP_PASSWORD') THEN
     :NEW.repsta_sftp_password := cripta (:NEW.repsta_sftp_password);
    ELSE
      IF UPDATING('NGNEER_SFTP_PASSWORD ') THEN
       :NEW.ngneer_sftp_password := cripta (:NEW.ngneer_sftp_password);
      END IF;
    END IF;
  END IF;
END;
/

Open in new window

0
 

Author Comment

by:CRISTIANO_CORRADI
ID: 22703829
Thanks for your help: I've modified your source code as follows.

500 points for you ;-)
CREATE OR REPLACE TRIGGER MASTER.repsta_source
   BEFORE INSERT OR UPDATE OF repsta_sftp_password, ngneer_sftp_password
   ON MASTER.nerepsta_config
   REFERENCING NEW AS NEW OLD AS OLD
   FOR EACH ROW
BEGIN
   IF INSERTING
   THEN
      BEGIN
         :NEW.repsta_sftp_password := cripta (:NEW.repsta_sftp_password);
         :NEW.ngneer_sftp_password := cripta (:NEW.ngneer_sftp_password);
      END;
   END IF;
 
   IF UPDATING ('REPSTA_SFTP_PASSWORD')
   THEN
      :NEW.repsta_sftp_password := cripta (:NEW.repsta_sftp_password);
   END IF;
 
   IF UPDATING ('NGNEER_SFTP_PASSWORD')
   THEN
      :NEW.ngneer_sftp_password := cripta (:NEW.ngneer_sftp_password);
   END IF;
END;
/

Open in new window

0
 

Author Closing Comment

by:CRISTIANO_CORRADI
ID: 31505599
Thank you very much for your fast, kind help ;-)
0

Featured Post

What is SQL Server and how does it work?

The purpose of this paper is to provide you background on SQL Server. It’s your self-study guide for learning fundamentals. It includes both the history of SQL and its technical basics. Concepts and definitions will form the solid foundation of your future DBA expertise.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Checking the Alert Log in AWS RDS Oracle can be a pain through their user interface.  I made a script to download the Alert Log, look for errors, and email me the trace files.  In this article I'll describe what I did and share my script.
When it comes to protecting Oracle Database servers and systems, there are a ton of myths out there. Here are the most common.
This video explains at a high level with the mandatory Oracle Memory processes are as well as touching on some of the more common optional ones.
This videos aims to give the viewer a basic demonstration of how a user can query current session information by using the SYS_CONTEXT function
Suggested Courses

770 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question