2016-10-24 10:36 GMT+02:00 Albe Laurenz <laurenz.a...@wien.gv.at>: > Nicolas Paris wrote: > > I have a 9.6 pg instance, and I am trying to link a foreign postgresql > database that do not accept > > extended queries. (only simple queries https://www.postgresql.org/ > docs/current/static/protocol.html ) > > > > When I run a query against the foreign pg instance thought postres_fdw, > it looks like it sends a > > transaction containing > > > > DECLARE c1 CURSOR FOR > > SELECT customer_id FROM foodmart.customer > > > > -> is there a way to run a simple query with postgres_fdw such: > > > > SELECT customer_id FROM foodmart.customer > > No, it is part of the design that cursors are used, so that rows can be > fetched one at a time and concurrent DML statements can be run. >
Actually problem is not with the cursor, sorry. Error message says it's related to a prepared statement. I am not able to debug it and see what is happening and what is the prepared statement. > You might consider using dblink. > Dblink works great, but It seems less flexible (no predicate push down). I am able to create a view that encapsulate dblink, but all the rows are fetch each time I use the view. > Yours, > Laurenz Albe >
