UDF Return-Table Based On Repository Table

I have tried the following:

FUNCTION "mySchema"."myFunction" ( )

  RETURNS TABLE ( "SAPR3"."TCURR" )

  LANGUAGE SQLSCRIPT

  SQL SECURITY INVOKER AS

BEGIN

/*****************************

  Write your function logic

*****************************/

END;

and various derivations thereof, but activation fails with the syntax error "Syntax error in table function object: incorrect syntax near ".": line 13 col 26 (at pos 475)" and I cannot find anything which works.

Any suggestions out there?