The docs have this description for pg_class::relfilenode: "Name of the
on-disk file of this relation; 0 if none". However, Elein just pointed
out to me that there are no entries with 0, so this description seems
incorrect. What should we say? It appears that in at least some of these
cases the value is the same as the oid.
cheers
andrew
---------------------------(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
