> Sub-objects (parameters, columns, constraints) and attributes (say, routine
> source) are not tracked directly.
> 
> You should read system tables and compare (in before and after triggers).

How?

Yes I can create a trigger, but I can't read the before/after views of the 
system table from a trigger.  I only get a single viewpoint of the schema -- 
the current.

So, you can't see what sub-objects have changed.  Which is the limitation I am 
trying to highlight.


Sean


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