IBM has just announced they are waving all rights and providing access to 500 patents. In the list of 500 there are several that relate RDBMS and query optimizations, it may be worth a look.
http://www.ibm.com/news/us/en/2005/01/patents.html -- Darcy Buskermolen Wavefire Technologies Corp. ph: 250.717.0200 fx: 250.763.1759 http://www.wavefire.com ---------------------------(end of broadcast)--------------------------- TIP 5: Have you checked our extensive FAQ? http://www.postgresql.org/docs/faqs/FAQ.html
