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(at)gmail(dot)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)