This is patch for oracle plugin. Many times when I get a violation constraint error for my sql I am rather stuck unable to tell what is causing the problem.
The constraint name it isn't always very descriptive and quering the dictionary views is rather tedious and slow.
I made a patch that basically adds a "CONSTRAINT" node in every table node to show all the constraints for that table.
There is even a source tab that creates the SQL code by looking up data into the views.
Hope this can be useful for somebody else too.