Log Message:
-----------
Tweak make_inh_translation_lists() to check the common case wherein parent and
child attnums are the same, before it grovels through each and every child
column looking for a name match. Saves some time in large inheritance trees,
per example from Greg.
Modified Files:
--------------
pgsql/src/backend/optimizer/prep:
prepunion.c (r1.140 -> r1.141)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/optimizer/prep/prepunion.c.diff?r1=1.140&r2=1.141)
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