maintenance/archives/patch-cache.sql

   1 -- patch-cache.sql
   2 -- 2003-03-22  <brion@pobox.com>
   3 --
   4 -- Add 'last touched' fields to cur and user tables.
   5 -- These are useful for maintaining cache consistency.
   6 -- (Updates to OutputPage.php and elsewhere.)
   7 --
   8 -- cur_touched should be set to the current time whenever:
   9 --  * the page is updated
  10 --  * a linked page is created
  11 --  * a linked page is destroyed
  12 --
  13 -- The cur_touched time will then be compared against the
  14 -- timestamps of cached pages to ensure consistency; if
  15 -- cur_touched is later, the page must be regenerated.
  16
  17 ALTER TABLE /*$wgDBprefix*/cur
  18   ADD COLUMN cur_touched binary(14) NOT NULL default '';
  19
  20 -- Existing pages should be initialized to the current
  21 -- time so they don't needlessly rerender until they are
  22 -- changed for the first time:
  23
  24 UPDATE /*$wgDBprefix*/cur
  25   SET cur_touched=NOW()+0;
  26
  27 -- user_touched should be set to the current time whenever:
  28 --  * the user logs in
  29 --  * the user saves preferences (if no longer default...?)
  30 --  * the user's newtalk status is altered
  31 --
  32 -- The user_touched time should also be checked against the
  33 -- timestamp reported by a browser requesting revalidation.
  34 -- If user_touched is later than the reported last modified
  35 -- time, the page should be rerendered with new options and
  36 -- sent again.
  37
  38 ALTER TABLE /*$wgDBprefix*/user
  39   ADD COLUMN user_touched binary(14) NOT NULL default '';
  40 UPDATE /*$wgDBprefix*/user
  41   SET user_touched=NOW()+0;