diff -r e09139525580 -r 4b8c3f51d7da pgsql/update_tables_0.5.x-0.6.pgsql
--- a/pgsql/update_tables_0.5.x-0.6.pgsql	Fri Apr 13 23:24:12 2012 +0200
+++ b/pgsql/update_tables_0.5.x-0.6.pgsql	Sat Apr 14 15:11:27 2012 +0000
@@ -91,7 +91,7 @@
 ALTER TABLE domain_data ADD CONSTRAINT fkey_domain_data_qid_quotalimit
     FOREIGN KEY (qid) REFERENCES quotalimit (qid);
 
-ALTER TABLE users ADD COLUMN qid bigint NULL DEFAULT NULL;
+ALTER TABLE users ADD COLUMN qid bigint NOT NULL DEFAULT 1;
 ALTER TABLE users ADD CONSTRAINT fkey_users_qid_quotalimit
     FOREIGN KEY (qid) REFERENCES quotalimit (qid);
 
@@ -125,7 +125,7 @@
 ALTER TABLE domain_data ADD CONSTRAINT fkey_domain_data_ssid_service_set
     FOREIGN KEY (ssid) REFERENCES service_set (ssid);
 
-ALTER TABLE users ADD COLUMN ssid bigint NULL DEFAULT NULL;
+ALTER TABLE users ADD COLUMN ssid bigint NOT NULL DEFAULT 1;
 -- save current service sets
 UPDATE users u
    SET ssid = ss.ssid
@@ -145,24 +145,6 @@
 -- ---
 -- Catchall
 -- ---
--- Quota/Service/Transport inheritance
--- ---
-ALTER TABLE users ALTER COLUMN tid DROP NULL;
-ALTER TABLE users ALTER COLUMN tid SET DEFAULT NULL;
--- The qid and ssid columns have already been defined accordingly above.
--- The rest of the logic will take place in the functions.
-
--- While qid and ssid are new and it's perfectly okay for existing users to
--- get NULL values (i.e. inherit from the domain's default), tid existed in
--- vmm 0.5.x. A sensible way forward seems thus to NULL all user records' tid
--- fields where the tid duplicates the value stored in the domain's record.
-UPDATE users
-   SET tid = NULL
- WHERE tid = (SELECT tid
-                FROM domain_data
-               WHERE domain_data.gid = users.gid);
-
--- ---
 
 CREATE TABLE catchall (
     gid         bigint NOT NULL,
@@ -295,20 +277,12 @@
     BEGIN
         FOR record IN
             SELECT userid, passwd, smtp, pop3, imap, managesieve
-              FROM users, service_set, domain_data
-             WHERE users.gid = (SELECT gid
-                                  FROM domain_name
-                                 WHERE domainname = the_domain)
+              FROM users, service_set
+             WHERE gid = (SELECT gid
+                            FROM domain_name
+                           WHERE domainname = the_domain)
                AND local_part = localpart
                AND service_set.ssid = users.ssid
-               AND users.gid = domain_data.gid
-               AND CASE WHEN
-                  users.ssid IS NOT NULL
-                  THEN
-                    service_set.ssid = users.ssid
-                  ELSE
-                    service_set.ssid = domain_data.ssid
-                  END
             LOOP
                 RETURN NEXT record;
             END LOOP;
@@ -339,13 +313,7 @@
                AND maillocation.mid = users.mid
                AND mailboxformat.fid = maillocation.fid
                AND domain_data.gid = did
-               AND CASE WHEN
-                     users.qid IS NOT NULL
-                   THEN
-                     quotalimit.qid = users.qid
-                   ELSE
-                     quotalimit.qid = domain_data.qid
-                   END
+               AND quotalimit.qid = users.qid
             LOOP
                 RETURN NEXT record;
             END LOOP;
@@ -467,20 +435,16 @@
     DECLARE
         record recipient_transport;
         recipient varchar(320) := localpart || '@' || the_domain;
-        did bigint := (SELECT gid FROM domain_name WHERE domainname = the_domain);
-        transport_id bigint := (SELECT tid FROM users
-                                  WHERE gid = did AND local_part = localpart);
     BEGIN
-        IF transport_id IS NULL THEN
-            SELECT tid INTO STRICT transport_id
-              FROM domain_data
-             WHERE gid = did;
-        END IF;
-
         FOR record IN
             SELECT recipient, transport
               FROM transport
-             WHERE tid = transport_id
+             WHERE tid = (SELECT tid
+                            FROM users
+                           WHERE gid = (SELECT gid
+                                          FROM domain_name
+                                         WHERE domainname = the_domain)
+                             AND local_part = localpart)
             LOOP
                 RETURN NEXT record;
             END LOOP;