Dave,
Please look at the docs for creating triggers.
(http:/www.postgresql.org/docs/).
Hopefully, someone on this list with more experience with Update and
Insert triggers can give you some help in avoiding the classic problems,
such as infinite loops.
Let me ask the obvious question:
If the InsertTime field is not open to user input, why are you providing
users with a data-entry interface for this field at all? Why not hide
it, or display it read-only?
-Josh Berkus
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