Alvaro and Tom, thanks so much. I was getting worried that I was going
to have to ask my customers to dump and restore periodically, ugh. I
think I need to learn a bit more about postgresql internals to help me
with my project. Not thinking about selecting for oids is kind of
embarrassing.
Thanks,
Omar
Alvaro Herrera wrote:
omar wrote:
SELECT relfilenode, relname FROM pg_class WHERE relname !~ '^(pg_|sql_)'
AND relkind = 'r'
Oid o = PQftable(_res, i);
Um ... are you laboring under some delusion about relfilenode being the
same as relation OID?
Apparently I am. libpq docs claim that "You can query the system table
pg_class to determine exactly which table is referenced." for PQftable.
I query pg_class and the only column that looks remotely like a unique
oid is relfilenode.
select oid, relname from pg_class where ...
relfilenode is just the file name given to the table, which is the same
as the OID when the table is just created, but changes after certain
operations (CLUSTER, TRUNCATE, REINDEX for indexes, maybe others)
---------------------------(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
