Apex - Audit Trail With External Database

Question

I'm currently trying to setup a primitive audit trail that allows me to record create data, create user, update date, update user. I currently have 3/4 however I can't get the username into database as V('APP_USER') is within Apex and the database is in Oracle 10G elsewhere.
Any suggestions or alternative ideas?

Answer 1

f1f7a787-7f56-4451-8300-5a9a0215226b
So v() and apex_application.g_user are unavailable in the trigger code on the external database.
But procedures and package variables from the external database are available on the database running APEX.
What I would do is create a package with a package variable that will hold the apex user. ( in the external database)
Then in application definition > Database session> initialization PL/SQL code set this package variable to the apex user.
Clear the package variable again in the cleanup code.
Using a package variable will mean that the value is aviable during the whole database session but not outside of is.
In apex every page load or submit and following page load is a database session.
Now the package variable will be set when it is a apex user and null when it is a database user.
Using a nvl round the package variable with user as alternative will give the apex user when the action was done by a apex user and the database user when not.
Nicolette
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