Re: cache lookup failed for constraint when alter table referred by partition table

On 2018-Sep-10, Alvaro Herrera wrote:

> On 2018-Sep-10, Justin Pryzby wrote:
> 
> > Adding Alvaro 
> > 
> > On Fri, Sep 07, 2018 at 04:02:13PM +0530, Rajkumar Raghuwanshi wrote:
> > > postgres=# CREATE TABLE non_part (a INT,PRIMARY KEY(a));
> > > postgres=# CREATE TABLE part (a INT REFERENCES non_part(a)) PARTITION BY RANGE(a);
> > > postgres=# CREATE TABLE part_p1 PARTITION OF part FOR VALUES FROM (MINVALUE) TO (MAXVALUE);
> > > postgres=# ALTER TABLE non_part ALTER COLUMN a TYPE bigint;
> > > *ERROR:  cache lookup failed for constraint 16398*

ATPostAlterTypeCleanup is trying to search the original constraint by
OID in order to drop it, but it's not there -- I suppose it has already
been dropped by recursion in a previous step.  Not sure what the fix is
yet, but I'll look into it later today.

-- 
Álvaro Herrera                https://www.2ndQuadrant.com/
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