dovecot - Jul 2012 - MySQL dict issues

Testing using the mysql dict for quota storage 
(dovecot-2.0.12-2_127.el5), and ran into a couple issues.  First is a 
permissions issue:

dovecot: lmtp(26786, dude at test.tld):  Error: 
net_connect_unix(/var/run/dovecot/dict) failed: Permission denied 
(euid=5000(<unknown>) egid=5000(<unknown>) missing +r perm: 
/var/run/dovecot/dict, euid is not dir owner)

The file /var/run/dovecot/dict is listed with srw------- perms.  I 
changes the perms to srw----rwx and it works, but I would like to figure 
out how to configure properly to run with the uid and gid 5000 as this 
is the user for virtual mail.

The second issue is that two identical rows are created in the mysql 
database for each user quota.  The next message delivered updates both 
rows.  Here is my quota config:

90-quota.conf:

plugin {
   quota_rule = *:storage=10G
   quota_rule2 = Trash:storage=+10%
}
plugin {
   quota = dict:user::proxy::userquota
}
dict {
   userquota = mysql:/etc/dovecot/dovecot-dict-sql.conf.ext
}

dovecot-dict-sql.conf.ext:

connect = host=a.b.c.d dbname=mail user=user password=derp
map {
   pattern = priv/quota/storage
   table = domain_user_quotas
   username_field = username
   value_field = bytes
}
map {
   pattern = priv/quota/messages
   table = domain_user_quotas
   username_field = username
   value_field = message_count
}

The last issue might be a documentation omission.  Dovecot warned me 
that the mysql user did not have DELETE privileges on the quota table:

dovecot: dict: Error: sql dict: commit failed: DELETE command denied to 
user 'user'@'a.b.c.d' for table 'domain_user_quotas'

The quota dict documentation (at http://wiki2.dovecot.org/Quota/Dict) 
does not mention DELETE being needed:

MySQL uses the following queries to update the quota. You need suitable 
privileges.

INSERT INTO table (bytes,username) VALUES ('112497180','foo at
spam.dom') ON DUPLICATE KEY UPDATE bytes='112497180';
INSERT INTO table (messages,username) VALUES ('1743','foo at
spam.dom') ON DUPLICATE KEY UPDATE messages='1743';
UPDATE table SET bytes=bytes-14433,messages=messages-2 WHERE username = 'foo
at spam.dom';

On 11.7.2012, at 21.10, list at airstreamcomm.net wrote:
> Testing using the mysql dict for quota storage (dovecot-2.0.12-2_127.el5),
and ran into a couple issues.  First is a permissions issue:
> 
> dovecot: lmtp(26786, dude at test.tld):  Error:
net_connect_unix(/var/run/dovecot/dict) failed: Permission denied
(euid=5000(<unknown>) egid=5000(<unknown>) missing +r perm:
/var/run/dovecot/dict, euid is not dir owner)
> 
> The file /var/run/dovecot/dict is listed with srw------- perms.  I changes
the perms to srw----rwx and it works, but I would like to figure out how to
configure properly to run with the uid and gid 5000 as this is the user for
virtual mail.
http://wiki2.dovecot.org/Dict explains this.
> The second issue is that two identical rows are created in the mysql
database for each user quota.  The next message delivered updates both rows.
Identical? Or perhaps one is the number of bytes and the other is the number of
messages?
> The last issue might be a documentation omission.  Dovecot warned me that
the mysql user did not have DELETE privileges on the quota table:
> 
> dovecot: dict: Error: sql dict: commit failed: DELETE command denied to
user 'user'@'a.b.c.d' for table 'domain_user_quotas'
This is done when recalculating quota.
> The quota dict documentation (at http://wiki2.dovecot.org/Quota/Dict) does
not mention DELETE being needed:
Updated.