[SQL] 7.2 functions that return multiple result sets?

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Can some one please confirm( with a plpgsql function example please ) a postgres "7.2" function that can return multiple rows to the client.   I've gone through the docs and can't find anything to support this -it seems you can only have one return value or null.   Yes i'm aware this it is possible in 7.3 - can someone please confirm its not possible in 7.2 or provide me with an example of how to go about it.     Thank you.