Tom Lane wrote:
> However, this still doesn't address the problem of what happens when the
> top-level select fails to read all of the CTE output (because it has a
> LIMIT, or the client doesn't read all the output of a portal, etc etc).
> Partially executing an update in such cases is no good.
I've previously thought about making the CTE aware of the LIMIT,
similarly to a top-N sort, but I don't think it's worth it. If we have
a LIMIT, we could just fall back to the statement-at-the-time execution.
I'm not sure what all cases you mean with "the client doesn't read all
the output of a portal", but at least for cursors we'd have to first
execute ModifyTable nodes.
Regards,
Marko Tiikkaja
