Question

I would like to update a value in Redshift table from results of other table, I'm trying to run to following query but received an error.

update section_translate
set word=t.section_type
from (
select distinct section_type from mr_usage where section_type like '%sディスコ')t
where word = '80sディスコ'

The error I received:

ERROR: Target table must be part of an equijoin predicate

Can't understand what is incorrect in my query.

Answer 1

您需要将不相关的子查询设置为相关子查询，

variantFilter { variant ->
    def dim = variant.flavors.collectEntries {
        [(it.productFlavor.dimension): it.productFlavor.name]
    }

    if (dim.dimensionOne == 'paid' && dim.dimensionSecond == 'someVal') {
        variant.setIgnore(true);
    }
}

否则，外部查询的每条记录都有资格进行更新，查询引擎会拒绝它。 Postgre（以及Redshift）评估不相关子查询的方式与SQL Server / Oracle等略有不同。

Update from existing table in Redshift

1 个答案: