Re: Attaching database

Hi, Pavel,

On Mon, Oct 19, 2020 at 12:51 PM Pavel Stehule <pavel.stehule@gmail.com> wrote:
>
> Hi
>
> po 19. 10. 2020 v 19:40 odesílatel Igor Korot <ikorot01@gmail.com> napsal:
>>
>> Hi,
>> IIUC, PostgreSQL does not support attaching a database to an existing
>> connection.
>> However I was told that I can use this:
>> https://www.postgresql.org/docs/9.3/postgres-fdw.html.
>>
>> Is it the same thing? Why there is no simple
>>
>> ATTACH <db> AS <dbname>
>>
>
> It is a different thing - postgresql_fdw does nested connect - it uses client-server protocol.
>
> For postgres connect and sql engine process is one entity - and engine is written without a possibility to reconnect to another database.

So if I understand correctly the postgresql_fdw is creating a second
connection and uses it as kind of "virtualizing mechanism"
in order to give access to the second database.

Am I right?

Thank you.

>
> Regards
>
> Pavel
>
>
>
>>
>> ?
>>
>> Thank you.
>>
>>