Re: [PATCH 4/4] Add tests to dblink covering use of COPY TO FUNCTION

On Tue, Dec 29, 2009 at 11:44 PM, Jeff Davis <pgsql@j-davis.com> wrote:
> On Tue, 2009-12-29 at 23:11 -0500, Robert Haas wrote:
>> I fear that to make this really useful we would need to define some
>> new SQL syntax, like:
>>
>> CREATE [OR REPLACE] COPY TARGET name (STARTUP function_name, STREAM
>> function_name, SHUTDOWN function_name);
>> DROP COPY TARGET name;
>> GRANT USAGE ON COPY TARGET TO ...;
>>
>> COPY ... TO/FROM TARGET name (generic_option_list) WITH (options);
>
> Similar ideas were already suggested:
>
> http://archives.postgresql.org/pgsql-hackers/2009-11/msg01601.php
> http://archives.postgresql.org/pgsql-hackers/2009-11/msg01610.php

Sorry, it's been a while since I've read through this thread and I am
not as up on it as perhaps I should be.  I generally agree with those
ideas, although I think that trying to make the existing aggregate
interface serve this purpose will probably turn out to be trying to
make a square peg fit a round hole.

> Regardless, I think there needs to be a way to pass arguments to the
> functions (at least the startup one). The obvious use case is to pass
> the destination table name, so that you don't have to define a separate
> target for each destination table.

Agreed, note that I suggested a way to do that.

...Robert