Oracle FAQ Your Portal to the Oracle Knowledge Grid

Home -> Community -> Usenet -> c.d.o.misc -> Re: How to detect views w/ JDBC?

Re: How to detect views w/ JDBC?

From: Bob Bunch (OCP) <>
Date: Mon, 18 Apr 2005 08:15:46 -0400
Message-Id: <>

On Mon, 18 Apr 2005 03:39:58 +0000, HansF wrote:

> On Sun, 17 Apr 2005 23:14:22 -0400, Bob Bunch (OCP) interested us by
> writing:

>> Perhaps I should've clarified that this is for a code generator, NOT a
>> to-be-live application.  I'm generating classes based on a given
>> schema's tables/views, and need to determine WHAT a given entity is, so
>> I can NOT generate insert/update/delete methods if the entity is a
>> view.

> 1) If you are thinking about database independence, listen to Jim.
> 2) Oracle has vews '???_TABLES' and '???_VIEWS' that list tables and
> views. ???=USER for those owned by the logged-in user'; =ALL for those
> accessible by the user; =DBA for all, if the user has DBA rights.
> 3) Some of Oracle's views are updateable. If you are unfamiliar with
> this, suggest you reread the manuals and 'Reilly book 'Mastering Oracle
> SQL' to get more info.
> Also check out '???_UPDATABLE_COLUMNS'
> 4) In many cases, you should seriously consider turning those methods
> into triggers (or PL/SQL routines called by triggers). That helps to
> ensure complete data consistency regardless of which mechanism your
> users find to bypass your application code.
> (Unless you tie their hands behind their backs, someone will find out
> that Excel and ODBC can ruin what you are doing. They will then delight
> in telling you that there is a major bug in your system, based on the
> report they generated after mucking with your datay.)
> 5) Oracle's online docco at is handy. In this
> case, concentrate on the Concepts manual and the Reference manual for
> the relevant version,
> 6) Realize that what you are doing is somewhat version dependent. Be
> prepared for long term maintenance.
  1. Jim didn't tell me HOW TO do anything.
  2. I'm not just a Java coder; I've been an Oracle DBA for > 10 years, 7.1 --> 10g. *Of course* I could hit the user_/all_/dba_ views to get what I want (I've written Swing apps in the past that did all kinds of neat/nifty DBA stuff), but this *must be* DB agnostic. MySQL, Sybase, DB2 -- do they have the same views? No.
  3. And some are not, hence my question.
  4. I'm fully aware of Oracle's SP/SF/trigger capabilities. This is BY NO MEANS platform agnostic, and believe me - I'm a big proponent of using said capabilities! However, it's not appropriate for this situaion.
  5. Been there done that - do they have examples for how to determine, via standard JDBC calls ONLY, how to detect a view?
  6. No it isn't - what I'm TRYING to do is DB agnostic, therefore would work on not just other vendors, but any version of Oracle that JDBC will hook up to.

Bottom line - please _fully_ read my situation befoe telling me to do bunch of Oracle-specific stuff. I would just LOVE it if I could ONLY EVER support Oracle - I have 99.9% of my experience w/ this great platform; however, this is not my current reality for this particular project. If you don't know how to do this, I appreciate your help, but please don't just tell me how to do it w/ Oracle-specifics. I already know that. ;) Received on Mon Apr 18 2005 - 07:15:46 CDT

Original text of this message