On 2020-10-19 20:21:05 +0200, Pavel Stehule wrote: > po 19. 10. 2020 v 20:18 odesílatel Igor Korot <[email protected]> napsal: > On Mon, Oct 19, 2020 at 12:51 PM Pavel Stehule <[email protected]> > wrote: > > 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. > > > yes - it does new connect to somewhere (local or remote server, but mechanism > is absolutely same)
In case this isn't clear:
It is the server (or more specifically, the foreign data wrapper) which
opens that connection. To the client it looks like it's just accessing a
normal table within the same database.
hp
--
_ | Peter J. Holzer | Story must make more sense than reality.
|_|_) | |
| | | [email protected] | -- Charles Stross, "Creative writing
__/ | http://www.hjp.at/ | challenge!"
signature.asc
Description: PGP signature
