[ 'dropIndex', 'user_groups', 'ug_user_group', 'patch-user_groups-primary-key.sql' ],
[ 'addField', 'user_groups', 'ug_expiry', 'patch-user_groups-ug_expiry.sql' ],
[ 'addIndex', 'image', 'img_user_timestamp', 'patch-image-user-index-2.sql' ],
+ [ 'modifyField', 'image', 'img_media_type', 'patch-add-3d.sql' ],
];
}