On Tue, Jan 10, 2017 at 5:38 PM, Andrew Gierth <and...@tao11.riddles.org.uk> wrote: > But the problem that actually came up is this: if you do the PQprepare > before the named cursor has actually been opened, then everything works > _up until_ the first event, such as a change to search_path, that forces > a revalidation; and at that point it fails with the "must not change > result type" error _even if_ the cursor always has exactly the same > result type. This happens because the initial prepare actually stored > NULL for plansource->resultDesc, since the cursor name wasn't found, > while on the revalidate, when the cursor obviously does exist, it gets > the actual result type. > > It seems a bit of a "gotcha" to have it fail in this case when the > result type isn't actually being checked in other cases.
To me, that sounds like a bug. -- Robert Haas EnterpriseDB: http://www.enterprisedb.com The Enterprise PostgreSQL Company -- Sent via pgsql-hackers mailing list (firstname.lastname@example.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers