Andres Freund <andres@xxxxxxxxxxx> writes: > So, I think making COPY extensible would be quite beneficial. I'm > however quite doubtful that we want to add core code to handle all of > the above. I think we should make the COPY input/output formatting > extensible by extensions. +1. I can't see carrying code for these formats in-core, but I've no objection to making it possible for someone else to maintain them. > I imagine we'd have callbacks for > - start copy in / out > - output row, with a an array of values/nulls > - parse row, with a input buffer as argument, returning values / nulls arrays > - finish copy in / out Also something to allow absorbing format-specific options, if the precedent of CSV is anything to go by. (Any such patch should manage to turn COPY-CSV into an extension, at least so far as copy.c is concerned, even if we don't package it as one.) regards, tom lane
