|From:||Simon Riggs <simon(at)2ndquadrant(dot)com>|
|To:||Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>|
|Subject:||Re: Scrollable cursors and Sort performance|
|Views:||Raw Message | Whole Thread | Download mbox|
On Mon, 2006-02-27 at 10:07 -0500, Tom Lane wrote:
> Simon Riggs <simon(at)2ndquadrant(dot)com> writes:
> > On Sun, 2006-02-26 at 19:26 -0500, Tom Lane wrote:
> >> After looking at my old notes about Materialize,
> >> I am thinking that we should add a "int flags" parameter to the InitNode
> >> calls along with ExecutorStart and probably PortalStart.
> > Design-wise I was looking at putting a named struc in there, so it would
> > be easily expandible in the future to carry anything else that needs to
> > be passed down through the nodes like this.
> That would be the hard way, primarily because it would require copying
> and modifying the struct at each level of recursion --- which'd turn
> what should be a nearly zero-cost patch into something with possibly
> nontrivial cost.
Yeh, didn't take me long to see the costs; I just gave that idea up
prior to reading your post. I won't go into *why* I was trying that,
especially since I've stopped...
Following your recipe pretty close as of now.
Best Regards, Simon Riggs
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