Hmm, interesting hack. I guess that would meet the part of the spec
that says, eg, information_schema.constraint_column_usage.column_name
must be an identifier --- at least if you also restricted which schema
the function could be in.
Apologies if I'm misunderstanding your point; couldn't you give the index name (since we've suggested you would have to have a unique index on the function in order to use it as an FK anyway) as the identifier?
Geoff
