access computed field of RECORD variable

Hi,

I ran into a roadblock at the very bottom of a fairly large database
design implementation. It will be at least messy to fix, unless there is
a neat solution.

The roadblock is:

There is a record, which may be from any of a set of similar databases.
Field names for this record are computed as strings. Using these strings,
I need to access fields of the record.

But I can't find the syntax for it.

Now, if a record variable is a known row type, I can get a field of a
computed name.
For a generic RECORD I can get a field by putting an explicit name the code,
(rec).FieldName1
But can one get the value of a computed field from a generic RECORD?

With
rec RECORD;
field TEXT;

The following all fail:

res := rec.field; -- ERROR: record "rec" has no field "field"
res := (rec.field); -- ERROR: record "rec" has no field "field"
res := (rec).field; -- ERROR: syntax error at or near "$2"
res := rec.(field); -- ERROR: syntax error at or near "("
res := rec."FieldName1"; -- gets field, but isn't what is needed

I also tried numerous other things that were doomed to fail.

Find an example file attached. Just "\i" it and play with the possibilites.

Thanks!

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