Re: DROP OWNED BY ... CACADE & "could not open relation with OID" error

From: Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>
To: Satoshi Nagayasu <snaga(at)uptime(dot)jp>
Cc: Pgsql Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: DROP OWNED BY ... CACADE & "could not open relation with OID" error
Date: 2016-07-21 04:53:52
Message-ID: 20160721045352.GA958496@alvherre.pgsql
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Satoshi Nagayasu wrote:
> Hi,
> I have been trying MADlib [1], a machine-learning library for PostgreSQL,
> and when I was tying it on 9.5 and 9.6beta2, I often got following
> error on my box.
> ------------------------------------
> : ERROR : SQL command failed:
> SQL: DROP OWNED BY madlib_19_installcheck CASCADE;
> ERROR: could not open relation with OID 147056
> ------------------------------------
> I wonder it could be a PostgreSQL bug or not.
> AFAIK, this kind of error should not occur during regular SQL command execution,
> so I guess this is a PostgreSQL bug.


> Should I dig it down deeper to reproduce in a simple procedure?

Yes, please.

Álvaro Herrera
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services

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