I can confirm this bug in CVS.

---------------------------------------------------------------------------

Rod Taylor wrote:
-- Start of PGP signed section.
> May have posted this earlier... 
> 
> It would seem that caching the plans for foreign keys has some unwanted
> side effects.
> 
> 
> test=# select version();
>                                 version
> ------------------------------------------------------------------------
>  PostgreSQL 7.4beta4 on i386-portbld-freebsd4.8, compiled by GCC 2.95.4
> (1 row)
>  
> test=#
> test=# create table a (col integer primary key);
> NOTICE:  CREATE TABLE / PRIMARY KEY will create implicit index "a_pkey"
> for table "a"
> CREATE TABLE
> test=#
> test=# create table b (col integer primary key references a on update
> cascade on delete cascade);
> NOTICE:  CREATE TABLE / PRIMARY KEY will create implicit index "b_pkey"
> for table "b"
> CREATE TABLE
> test=#
> test=#
> test=# insert into a values (1);
> INSERT 687978 1
> test=# insert into b values (1);
> INSERT 687979 1
> test=#
> test=# insert into a values (2);
> INSERT 687980 1
> test=# insert into b values (2);
> INSERT 687981 1
> test=#
> test=# delete from a where col = 1;
> DELETE 1
> test=#
> test=# alter table b drop constraint b_pkey;
> ALTER TABLE
> test=#
> test=# delete from a where col = 2;
> ERROR:  could not open relation with OID 687972
> 
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-- 
  Bruce Momjian                        |  http://candle.pha.pa.us
  [EMAIL PROTECTED]               |  (610) 359-1001
  +  If your life is a hard drive,     |  13 Roberts Road
  +  Christ can be your backup.        |  Newtown Square, Pennsylvania 19073

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