BUG #1814: Cancelling a CLUSTER changes the OID counter

The following bug has been logged online:

Bug reference:      1814
Logged by:          Ian Burrell
Email address:      ianburrell@gmail.com
PostgreSQL version: 7.4.6
Operating system:   RHEL 3 x86_64
Description:        Cancelling a CLUSTER changes the OID counter
Details:

Cancelling a CLUSTER is causing the OID counter to jump forwards.  In the
test below, it goes from 108 million to 4286 million (close to 2^32).

We recently wrapped the OID counter.

vodlive=# insert into foo values (1) ;
INSERT 108817614 1
Time: 0.675 ms
vodlive=# select oid, * from foo ;
    oid    | bar
-----------+-----
 108817614 |   1

vodlive=# CLUSTER idx_daily_by_cs_ti_wk_wk_cs_ti ON
daily_xtns_by_cable_sys_title_wk ;
Cancel request sent
ERROR:  canceling query due to user request
vodlive=# abort ;
ROLLBACK

vodlive=# insert into foo values (1) ;
INSERT 4286822632 1
Time: 0.475 ms
vodlive=# select oid, * from foo ;
    oid     | bar
------------+-----
 4286822632 |   1
(1 row)