Hi, On 2026-03-11 21:22:14 +0000, [email protected] wrote: > PostgreSQL has had a protocol feature negotiation framework since > 7.4 (the _pq_ namespace in startup parameters) -- over 20 years -- > but it's never been used in practice.
Wasn't that added in commit ae65f6066dc Author: Robert Haas <[email protected]> Date: 2017-11-21 13:56:24 -0500 Provide for forward compatibility with future minor protocol versions. Previously, any attempt to request a 3.x protocol version other than 3.0 would lead to a hard connection failure, which made the minor protocol version really no different from the major protocol version and precluded gentle protocol version breaks. Instead, when the client requests a 3.x protocol version where x is greater than 0, send the new NegotiateProtocolVersion message to convey that we support only 3.0. This makes it possible to introduce new minor protocol versions without requiring a connection retry when the server is older. PG 14 / 2017 is quite a while after 7.4... > > legacy - INSERT 0 N (default, fully backward compatible) > verbose - INSERT tablename N > fqn - INSERT schema.tablename N Pretty doubtful this survives the complexity / gain tradeoff. Separately, doing extra work during command handling isn't free either. We've spent a decent amount of effort in the past lowering it, see e.g. commit ac998020802 Author: David Rowley <[email protected]> Date: 2022-12-16 10:31:25 +1300 Speed up creation of command completion tags I'm loathe to add work to every statement. Greetings, Andres Freund
