Log Message:
-----------
Save a few cycles in EXPLAIN and related commands by not bothering to form
a physical tuple in do_tup_output(). A virtual tuple is easier to set up
and also easier for most tuple receivers to process. Per my comment on
Robert Haas' recent patch in this code.
Modified Files:
--------------
pgsql/src/backend/executor:
execTuples.c (r1.108 -> r1.109)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/executor/execTuples.c?r1=1.108&r2=1.109)