| From: | Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | Dave Page <dpage(at)pgadmin(dot)org>, PostgreSQL Hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: FDW state from plan time |
| Date: | 2011-04-03 18:05:59 |
| Message-ID: | 4D98B707.4060501@enterprisedb.com |
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| Lists: | pgsql-hackers |
On 03.04.2011 19:38, Tom Lane wrote:
> Dave Page<dpage(at)pgadmin(dot)org> writes:
>> I can't help thinking I must be missing something obvious here, but is
>> there any way to persist some data from PlanForeignScan to at least
>> BeginForeignScan in an FDW? I'm aware of fdwplan->fdw_private, but at
>> that needs to be copyObject compatible, it's not much use to me.
If you have to, you can encapsulate arbitrary data in a bytea const.
> Or you could use a hash of some other identifying information (perhaps
> the OID of the foreign server would be sufficient ID for a connection?).
Foreign server + user id, probably. That's what I would recommend in
this case.
--
Heikki Linnakangas
EnterpriseDB http://www.enterprisedb.com
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