Log Message:
-----------
Short-circuit AllocSetReset if nothing has been palloc'd in the memory
context since the previous AllocSetReset. Original patch by Atsushi Ogawa,
editorialized on a little bit by Tom Lane.
Modified Files:
--------------
pgsql/src/backend/utils/mmgr:
aset.c (r1.62 -> r1.63)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/mmgr/aset.c.diff?r1=1.62&r2=1.63)
---------------------------(end of broadcast)---------------------------
TIP 9: In versions below 8.0, the planner will ignore your desire to
choose an index scan if your joining column's datatypes do not
match
