Andrew Dunstan írta:
Alvaro Herrera wrote:
Böszörményi Zoltán wrote:
Hi,
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.
cheers
andrew
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
---------------------------(end of broadcast)---------------------------
TIP 9: In versions below 8.0, the planner will ignore your desire to
choose an index scan if your joining column's datatypes do not
match
