Re: Postgrest over foreign data wrapper

Hello Adrien,

I expect this should go to pgsql-general. This is not specific to JDBC.


Dave Cramer

[email protected]
www.postgresintl.com


On Wed, 13 Feb 2019 at 09:13, adrien ruffie <[email protected]>
wrote:

> Hello all,
>
> we have a tricky problem with my colleague.
> We have to database db1 and db2 linked by a foreign data wrapper
> connection.
> 1 table "contractline" in db1 and "contract" in db2.
>
> We use postgrest in order to request db2 via CURL.
> But we want to add a link between previous tables.
>
> In db2 we have a foreign table ft_contractline
> example:
>
>     Column    |           Type           | Collation | Nullable | Default
> | FDW options | Storage  | Stats target | Description
>
> --------------+--------------------------+-----------+----------+---------+-------------+----------+--------------+-------------
>  id           | character varying(1024)  |           | not null |
> |             | extended |              |
>  ccode      | text                     |           |          |         |
>             | extended |              |
>  status       | text                     |           |          |
> |             | extended |              |
>
> We want to add for example, the following constraint:
> ALTER TABLE contract ADD CONSTRAINT contractline_ft_contract_fkey FOREIGN
> KEY (contractid) REFERENCES ft_contractline(ccode);
>
> in order to use the following query (via CURL on db2):
> SELECT c.name, c.id FROM contract c JOIN ft_contractline ft_c ON c.id =
> ft_c.ccode WHERE c.type = 'business'
>
> but we saw, isn't possible to add a foreign key on 'contract' table of db2
> to 'ft_contractline' foreign table ...
>
> Do you know way to do it ?
>
> Thank all and best regards.
>
> Adrien
>