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https://issues.apache.org/jira/browse/DERBY-3849?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12649876#action_12649876
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Dag H. Wanvik commented on DERBY-3849:
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Kristian> .. not properly implemented..
Well, not at all, actually, the code seems to be throwing XCY02 (unsupported)
I don't believe there is a standard way to access this information from SQL; I
think a good start would be to make it
available from JDBC as you suggest. Couldn't we support arbitrary properties,
though, rather easily (not just
the three ones mention in the Javadoc (ApplicationName, ClientUser,
ClientHostname)?
> Session data
> ------------
>
> Key: DERBY-3849
> URL: https://issues.apache.org/jira/browse/DERBY-3849
> Project: Derby
> Issue Type: New Feature
> Components: Services
> Environment: N/A
> Reporter: Antonio Sánchez
> Priority: Minor
>
> Being able of storing session data the same way a Java application does with
> HttpSession.
> Some applications might require this feature or could take advantage of it
> in order to fulfill its requirement more easily.
> Next I will describe an example scenario but there might be many others that
> would benefit of this feature:
> "A client/server (java-swing/derby) application that requires connecting to
> derby always using the same database user; the application users are stored
> in a an application table, e.g., APPUSERS. The application also requires
> auditing the activity of the connection via 'triggers' but having the current
> application user the 'owner' or 'responsible' of the database connection.
> The problem is that there is no way of tracking the application user
> corresponding to a database connection. For instance: given this scenario, if
> we have application users 'foouser' and 'baruser' and the connecting database
> user 'derbyconnect' , CURRENT_USER will return always 'derbyconnect' for
> both 'foouser' and 'baruser' connections. Althouht it is true that we could
> create a table where application connections are managed, at the time of the
> audit triggers run there won't be a way of relating the running physical
> connection (derby connection user) with the logical one (application user).
> Having the chance of storing data for a physical connection (session) would
> make it work, just by storing the application user in the session and
> retrieving it when needed in the triggers. Otherwise the application would be
> forced to perform an extra request in order to carry out the audit operation
> passing the application user as an argument, which would make worse both
> performance and application design."
> I am not an expert neither on derby nor in databases and maybe derby already
> provides the way of fulfilling this without the need of developing a new
> feature; if that it is the case I would appreciate if someone could let me
> know. But it there is no way, then I think this one would be a great feature
> for application developers using derby in scenarios like the one described
> above.
> Thanks.
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