On Tue, 2006-10-31 at 18:18 -0500, John Major wrote: > #I am a biologist, and work with large datasets (tables with millions of > rows are common). > #These datasets often can be simplified as features with a name, and a > start and end position (ie: a range along a number line. GeneX is on > some chromosome from position 10->40) Do you know about www.biopostgres.org ? I believe they provide some additional indexing mechanisms for just this type of data. -- Simon Riggs EnterpriseDB http://www.enterprisedb.com