Re: Plpsql connecting to more than one database? - Mailing list pgsql-general

On Wednesday, March 30, 2016, Francisco Reyes <lists@natserv.net> wrote:

Is it possible to have a plpsql program connect to 2 databases?

This seems to imply it, http://stackoverflow.com/questions/18257003/pl-sql-querying-a-table-on-multiple-databases

However looking at the postgresql plpsql reference, http://www.postgresql.org/docs/current/static/plpgsql-cursors.html#PLPGSQL-CURSOR-OPENING, doesn't seem like there is a way to specify database. Is the stackoverflow for plpsql in some other database (not postgresql)?

Any pointers greatly appreciated.

Have users that are familiar with plpsql and have a process which needs to be done withing  transactions in 2 databases.
begin in db1
begin in db2

work on 1
work on 2

if work on both dbs worked

commit db1
commit db2

Do they need to use some other language (Java/Python)? How about a foreign data wrapper?

It's plpgsql, potentially with a slash, pl/pgsql.

You would have to use foreign data wrappers or dblink if you want a function to speak to a database other than the one it's calling session is attached to. 

Your SO link references Oracle's language.  It is called pl/SQL there.  Neither one has "plpsql".

David J.