Re: [sqlalchemy] Expiring only unchanged stale data

2012-02-04 Thread Michael Bayer
On Feb 4, 2012, at 11:23 AM, Mark Friedenbach wrote: > Hi, I'm running into a problem with my nested sets implementation. > Inserting, moving, or removing a node can potentially affect one or > more of many other nodes' tree properties (tree id, left, right, > depth, or parent relationship). For

[sqlalchemy] Expiring only unchanged stale data

2012-02-04 Thread Mark Friedenbach
Hi, I'm running into a problem with my nested sets implementation. Inserting, moving, or removing a node can potentially affect one or more of many other nodes' tree properties (tree id, left, right, depth, or parent relationship). For efficiency's sake this change occurs as a single, rather comple