UNION表时如何在Bigquery中重新排列/重新排序嵌套的重复列

Question

我有两个架构相似但顺序不同的 Bigquery 表

当使用下面的查询合并这两个表时，

select id, timestamp, products, count_total_visit, count_unique_session from table1
union all
select id, timestamp, products, count_total_visit, count_unique_session from table2

这是我得到的错误

UNION ALL 中的第 3 列具有不兼容的类型：ARRAY>, ARRAY> at [...]

如何重新排列嵌套重复字段的架构顺序，以便通过保持架构格式与源表相同的方式合并2张表？

Answer 1

下面会解决问题

select id, timestamp, products, count_total_visit, count_unique_session from table1
union all
select * replace (array( 
    select as struct * replace (array( 
        select as struct paiment_method, count_total_trx, sum_total_gbv, sum_total_revenue
          from product.details
        ) as details
      )
    from t.products product
  ) as products)
from table2 t