Overall, I assert again that approaching this issue through COPY enhancements is really not the way to go. We should be looking at a client utility, like pg_import and pg_export. The primary purpose of COPY is bulk loads for backup/restore, and I'm against doing a lot of tinkering which might make it less efficient or introduce new issues into what's currently very reliable.
That's not unreasonable. I floated my idea as an alternative to a much more radical proposal. If we decided against it we should remove the TODO item.
As against that, if we don't do this then I think we should embrace these utility programs more, possibly bringing them into the distribution.
cheers
andrew
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