如何删除 Big Query 中嵌套列内的列

Question

我尝试执行此查询：

create or replace table `project.dataset.new_table` as 
    select * replace(
      array(select as struct * except(address2) from t.addresses) 
      as addresses)
    from `project.dataset.table` t

基于这个问题：

但是我得到这个错误： “FROM 子句中引用的值必须是数组。t.addresses 的类型为 STRUCT<...“

我的嵌套列的架构是 table 是：

[
 {
    "fields": [
      {
        "name": "IsHappy",
        "type": "BOOLEAN"
      },
      {
        "fields": [
          {
            "name": "Description",
            "type": "STRING"
          }
        ],
        "mode": "REPEATED",
        "name": "FuncTypes",
        "type": "RECORD"
      },

      {
        "name": "address2",   --->hoping to delete this
        "type": "INTEGER"
      },
  
    ],
    "name": "addresses",
    "type": "RECORD"
  }
]

请问我应该更改什么或错误是什么意思？

Answer 1

下面使用

create or replace table your_new_table as 
select * replace(
      (select as struct addresses.* except(address2)) 
      as addresses
  )
from your_table;

如何删除 Big Query 中嵌套列内的列

How to delete a column inside a nested column in Big Query

google-bigquery