1 -- Stores the groups the user has once belonged to.
2 -- The user may still belong these groups. Check user_groups.
3 CREATE TABLE /*_*/user_former_groups (
5 ufg_user
int unsigned
NOT NULL default 0,
6 ufg_group
varbinary(255) NOT NULL default ''
7 ) /*$wgDBTableOptions*/;
9 CREATE UNIQUE INDEX /*i*/ufg_user_group
ON /*_*/user_former_groups (ufg_user
,ufg_group
);