Question

我的bigquery表由名为business_day的列进行分区

我正在尝试获取特定business_days内的所有行。例如，

select *
from table
where
    business_day >= "2018-12-01" and business_day <= "2019-01-01"
    or business_day >= "2019-12-01" and business_day <= "2010-01-01"
    or business_day >= "2020-12-01" and business_day <= "2021-01-01"

我收到此错误：

如果不对可用于分区消除的列“ business_day”进行过滤，则无法查询表“ table”

有没有不用UNION ALL来做到这一点的方法？

这是表格信息：

Table expiry: Never
Data location: EU
Table type: Partitioned
Partitioned by: Day
Partitioned on column: business_day
Partition filter: Required

我想念什么？

Answer 1

也许添加其他伪过滤器？但是，与UNION ALL相比，这可能会更加昂贵，因为它仍然可以读取不必要的分区：

select *
from table
where 
business_day >= "2018-12-01"
AND (business_day >= "2018-12-01" AND business_day <= "2019-01-01"
     OR business_day >= "2019-12-01" AND business_day <= "2010-01-01"
     OR business_day >= "2020-12-01" AND business_day <= "2021-01-01"
    )

在多个分区上查询bigquery

1 个答案: