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Marginal efficiency and beautification hack. I'm not sure whether this case ever arises currently, but the pending patch for update tuple routing will cause it to arise. Amit Khandekar Discussion: http://postgr.es/m/CAJ3gD9cazfppe7-wwUbabPcQ4_0SubkiPFD1+0r5_DkVNWo5yg@mail.gmail.com