> I have not been able to track down any information on coalesce nor get
> PostgreSQL execute it. Where is this documented?
Hmm. I seem to not have put it into the docs yet. Look at any SQL book
written in the last few years for details on its usage, or ask here.
btw, COALESCE() is a special case of CASE, which is also implemented,
but which currently has problems with handling results from multiple
tables.
- Tom