+ [ 'dropPgIndex', 'slots', 'slot_role_inherited' ],
+ [ 'dropPgField', 'slots', 'slot_inherited' ],
+ [ 'addPgField', 'slots', 'slot_origin', 'INTEGER NOT NULL' ],
+ [
+ 'addPgIndex',
+ 'slots',
+ 'slot_revision_origin_role',
+ '( slot_revision_id, slot_origin, slot_role_id )',
+ ],