Hi,

On 06/16/2009 04:32 PM, Robert Haas wrote:
On Tue, Jun 16, 2009 at 10:30 AM, Andres Freund<and...@anarazel.de>  wrote:
How would you model something like:
<plans>
  <plan>  ...</plan>
  <plan>  ...</plan>
  ...
</plans>
otherwise?

There are potentially unlimited number of child nodes - AppendNode for
example can have any number of them. Sure, you can give each<plan>  node a
'offset=' id, but that doesn't buy much.
I don't see how that could be much improved by using child-nodes (or even
worse attributes).
Note that even in this case we DON'T rely on the ordering of the
nodes.  The inner<plan>  nodes have child nodes which contain their
relationship to the parent.
Not in the case of Append nodes, but I fail to see a problem there, so...

Andres

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