On 10/11/24 04:08, Koen De Groote wrote: > In the release notes for postgres 17 I'm reading: > > > The PostgreSQL foreign data wrapper (postgres_fdw), used to execute > queries on remote PostgreSQL instances, can now push EXISTS and IN > subqueries to the remote server for more efficient processing. > > I'm confused as to what this means. In older versions, are parts of > queries not sent to the foreign server? Or is this change meant to imply > the sending of only the subqueries, the result of which is then directly > used in pushing the entire query? > > Or am I still wrong as to what this means? > > I looked at the documentation and there doesn't seem to be any > indication of particular queries not being pushed to the foreign server, > so this wording that "can now push EXISTS and IN subqueries to the > remote server" is confusing. > > What am I missing?
