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