Hi, The covering indexes patch  really needs a version of heap_form_tuple/index_form_tuple that allows to specify the number of columns in the to-be generated tuple. Previously the faster expression evaluation stuff could also have benefited form the same for both forming and deforming tuples.
It's obviously trivial to add, codewise. I think for index_form_tuple we can just add a parameter, but for heap_form_tuple/heap_deform_tuple that'd probably break a number of external users. How about adding _ex variants that allow to specify that? Regards, Andres  http://archives.postgresql.org/message-id/56168952.4010101%40postgrespro.ru -- Sent via pgsql-hackers mailing list (email@example.com) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers