The other day in the boost module worked around a bug in view by running the query manually #797496: Manipulating view filters in code. $view->result has different results from db_query of $view->build_info. Taking this same approach I can run explain on every query views can output.
Comments
Comment #1
mikeytown2 commentedHave different fieldgroups for each level of uglyness. filesorts, where, etc...
Comment #2
mikeytown2 commentedcommitted phase 1 of this
http://drupal.org/cvs?commit=367288
Comment #3
mikeytown2 commentedhelpful post
http://www.kpbowler.co.uk/perfect-tables-in-drupal