Ron Peterson wrote:
> This structure is more 'normal' in the sense that nodes without children
> (in a tree, the leaf nodes) don't have records in the edge table.
Phghpth. Should have had my coffee first. The first data structure
given would only have a null parent id for the root node, not all the
leaf nodes. My mistake. Thought it might be politic to point that out
before someone (correctly) called me an idiot.
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