Hi, On 2015-05-12 14:24:34 -0400, Tom Lane wrote: > I did a very basic update of your postgres_fdw patch to test this with, > and attach that so that you don't have to repeat the effort. I'm not sure > whether we want to try to convert that into something committable. I'm > afraid that the extra round trips involved in doing row locking this way > will be so expensive that no one really wants it for postgres_fdw. It's > more credible that FDWs operating against local storage would have use > for it.
Fujita-san, do you know of any FDWs that use this? I'm currently converting the EPQ machinery to slots, and in course of that I (with Horiguchi-san's help), converted RefetchForeignRow to return a slot. But there's currently no in-core user of this facility... I guess I can rebase the preliminary postgres_fdw patch here, but it bitrotted significantly. I also feel like there should be some test coverage for an API in a nontrivial part of the code... Greetings, Andres Freund
