CREATE TABLE /*_*/user_groups (
ug_user INT NOT NULL REFERENCES /*_*/mwuser(user_id) ON DELETE CASCADE,
ug_group NVARCHAR(255) NOT NULL DEFAULT '',
+ ug_expiry varchar(14) DEFAULT NULL,
+ PRIMARY KEY(ug_user, ug_group)
);
-CREATE UNIQUE clustered INDEX /*i*/ug_user_group ON /*_*/user_groups (ug_user, ug_group);
CREATE INDEX /*i*/ug_group ON /*_*/user_groups(ug_group);
+CREATE INDEX /*i*/ug_expiry ON /*_*/user_groups(ug_expiry);
-- Stores the groups the user has once belonged to.
-- The user may still belong to these groups (check user_groups).