Miscellany

ALTER TABLE {node} RENAME vid TO vid_old
Failed: ALTER TABLE {node} ADD COLUMN 
Failed: UPDATE {node} SET = vid_old
ALTER TABLE {node} DROP COLUMN vid_old
ALTER TABLE {node_revisions} RENAME nid TO nid_old
Failed: ALTER TABLE {node_revisions} ADD COLUMN 
Failed: UPDATE {node_revisions} SET = nid_old
ALTER TABLE {node_revisions} DROP COLUMN nid_old