Mining Software Repositories with Topic Models
Stephen W. Thomas · QSpace (Queen's University Library) · 2012
List, So, what do we need in order to find our way to indexonly scans? 1. The visibility map needs to be crash-safe. The basic idea of index-only scans is that, instead of checking the heap to find out whether each tuple is visible, we first check the visibility map. If the visibility map bit is set, then we know all tuples on the page are visible to Hi all, I use psql's -E mode every now and then, copyand-pasting and further tweaking the SQL displayed. Most queries are displayed terminated by a semicolon, but quite a few aren't, making copy-and-paste just a bit more tedious.