const db = cloud.database() db.collection('orders').aggregate()  .lookup({    from: 'books',    localField: 'book',    foreignField: 'title',    as: 'bookList',  })  .end()  .then(res => console.log(res))  .catch(err => console.error(err)) 根据示例改造 db.collection('PRODUCT_TYPE').aggregate({}) .lookup({ from: 'PRODUCT_LIST', localField: 'code', foreignField: 'type', as: 'productList', }) .end() .then(res => console.log(res)) .catch(err => console.error(err)) 无法使用 报错 VM167:1 Error: errCode: -502003 database permission denied | errMsg: Permission denied     at new u (WAService.js:1)     at Function.success (WAService.js:1)     at Object.success (WAService.js:1)     at r (WAService.js:1)     at WAService.js:1     at v (WAService.js:1)     at WAService.js:1     at t.<anonymous> (VM181 asdebug.js:1)     at WAService.js:1     at WAService.js:1