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Re: BUG #5748: Invalid oidvector data during binary recv

From: Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: Yeb Havinga <yebhavinga(at)gmail(dot)com>, pgsql-bugs(at)postgresql(dot)org
Subject: Re: BUG #5748: Invalid oidvector data during binary recv
Date: 2010-11-11 16:02:08
Message-ID: 4CDC1380.2090309@enterprisedb.com (view raw or flat)
Thread:
Lists: pgsql-bugs
On 11.11.2010 17:48, Tom Lane wrote:
> "Yeb Havinga"<yebhavinga(at)gmail(dot)com>  writes:
>> postgres=# create table a as select ''::oidvector;
>> SELECT 1
>> postgres=# copy a to '/tmp/test' with binary;
>> COPY 1
>> postgres=# copy a from '/tmp/test' with binary;
>> ERROR:  invalid oidvector data
>
> The problem seems to be that array_recv passes back a zero-dimensional
> array, *not* a 1-D array, when it observes that the input has no
> elements.  A zero-D array is not part of the subset of possible arrays
> that we allow for oidvector.

Yeah, I just reached that conclusion too..

> I'm less than convinced that this is worth fixing.  oidvector is not
> intended for general-purpose use anyway.  What's the use-case where this
> would come up?

I don't see any use case either, but I guess it would be nice to fix for 
the sake of completeness.

-- 
   Heikki Linnakangas
   EnterpriseDB   http://www.enterprisedb.com

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