> I used to use the connect-by patch, but have since rewritten everything
> to use a nested set model. 

Cool!   You're probably the only person I know other than me using nested sets 
in a production environment.

Josh Berkus
Aglio Database Solutions
San Francisco

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TIP 9: the planner will ignore your desire to choose an index scan if your
      joining column's datatypes do not match

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