On 14 November 2011 13:07, Thom Brown <t...@linux.com> wrote:
> 2011/11/14 Shigeru Hanada <shigeru.han...@gmail.com>
>> (2011/11/14 11:25), Robert Haas wrote:
>> > My vote is to nuke 'em all.  :-)
>> +1.
>> IIRC, main purpose of supporting tableoid for foreign tables was to be
>> basis of foreign table inheritance, which was not included in 9.1, and
>> we have not supported it yet.  Other system columns are essentially
>> garbage, but they survived at 9.1 development because (maybe) it seemed
>> little odd to have system columns partially at that time.
>> So, IMHO removing all system columns from foreign tables seems
>> reasonable, unless it doesn't break any external tool seriously (Perhaps
>> there would be few tools which assume that foreign tables have system
>> columns).
>> If there seems to be a consensus on removing system column from foreign
>> tables, I'd like to work on this issue.  Attached is a halfway patch,
>> and ISTM there is no problem so far.
> I can say that at least PgAdmin doesn't use these columns.

So we still have all of these columns for foreign tables.  I've tested
Hanada-san's patch and it removes all of the system columns.  Could we
consider applying it, or has a use-case for them since been


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