This was already blogged elsewhere last year. Part 1) http://patshaughnessy.net/2014/10/13/following-a-select-statement-through-postgres-internals http://patsha

This was already blogged elsewhere last year. Part 1) http://patshaughnessy.net/2014/10/13/following-a-select-statement-through-postgres-internals http://patshaughnessy.net/2014/10/13/following-a-select-stat... and Part 2) http://patshaughnessy.net/2014/11/11/discovering-the-computer-science-behind-postgres-indexes http://patshaughnessy.net/2014/11/11/discovering-the-compute...