--- /dev/null
+define mw_prefix='{$wgDBprefix}';
+
+CREATE TABLE &mw_prefix.user_former_groups (
+ ufg_user NUMBER DEFAULT 0 NOT NULL,
+ ufg_group VARCHAR2(255) NOT NULL
+);
+ALTER TABLE &mw_prefix.user_former_groups ADD CONSTRAINT &mw_prefix.user_former_groups_fk1 FOREIGN KEY (ufg_user) REFERENCES &mw_prefix.mwuser(user_id) ON DELETE CASCADE DEFERRABLE INITIALLY DEFERRED;
+CREATE UNIQUE INDEX &mw_prefix.user_former_groups_u01 ON &mw_prefix.user_former_groups (ufg_user,ufg_group);
+