Andrew Dunstan írta:
Alvaro Herrera wrote:
Böszörményi Zoltán wrote:

what's the problem with COPY view TO, other than you don't like it? :-)

The problem is that it required a ugly piece of code.  Not supporting it
means we can keep the code nice.  The previous discussion led to this
conclusion anyway so I don't know why we are debating it again.

What is so ugly about it? I haven't looked at the code, but I am curious to know.

I also don't recall the consensus being quite so clear cut. I guess there is a case for saying that if it's not allowed then you know that "COPY relname TO" is going to be fast. But, code aesthetics aside, the reasons for disallowing it seem a bit thin, to me.



I would say the timing difference between
"COPY table TO" and "COPY (SELECT * FROM table) TO"
was  noise, so it's not even faster.

And an updatable VIEW *may* allow COPY view FROM...

Best regards,
Zoltán Böszörményi

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