[Dovecot] Wiki entry for expire plugin, PostgreSQL trigger needs update

[Stefan Förster]

The wiki entry at http://wiki.dovecot.org/Plugins/Expire needs an
update for Dovecot 1.2 and PostgreSQL:

-- v1.2+:
CREATE OR REPLACE FUNCTION merge_expires() RETURNS TRIGGER AS $$
BEGIN
  IF exists(SELECT 1 FROM expires WHERE username = NEW.username AND mailbox = NEW.mailbox) THEN
    UPDATE expires SET expire_stamp = NEW.expire_stamp
      WHERE username = NEW.username AND mailbox = NEW.mailbox;
    RETURN NULL;
  ELSE
    RETURN NEW;
  END IF;
END;
$$ LANGUAGE plpgsql;

CREATE TRIGGER mergeexpires BEFORE INSERT ON expires
   FOR EACH ROW EXECUTE PROCEDURE merge_expires();

At least that's what I think after looking at the code:

iter = dict_iterate_init(dict, DICT_EXPIRE_PREFIX,
                DICT_ITERATE_FLAG_RECURSE |
                DICT_ITERATE_FLAG_SORT_BY_VALUE);

/* We'll get the oldest values (timestamps) first */
while (dict_iterate(iter, &key, &value) > 0) {
       /* key = DICT_EXPIRE_PREFIX<user>/<mailbox> */
       userp = key + strlen(DICT_EXPIRE_PREFIX);
[...]
T_BEGIN {
     username = t_strdup_until(userp, p);

If this code does somehow iterate usernames which are not present in
the dict, I apologize.


Cheers
Stefan