>I don't see a way in PSQL to have a looping construct that checks the
> conditon after the code executes vs a WHILE loop. Does such a thing
> exist that I've missed?

No, but you can easily simulate it:

WHILE (0=0) DO BEGIN
... your code ...
IF (... condition ...) THEN BREAK;
END

Ivan
http://www.volny.cz/iprenosil/interbase/