使用Bigquery中的where条件更新嵌套记录 [英] Update nested record with where condition in Bigquery
本文介绍了使用Bigquery中的where条件更新嵌套记录的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我有一个BigQuery表' metrics ',该表具有嵌套的记录字段,其中一个字段称为 resource.labels ,该表具有如下所示的密钥对值
I have a bigquery table 'metrics' which has nested record fields One of the fields is called resource.labels which has key pair values as shown below
我需要更新resource.labels,它是一个重复的记录字段,并且在这种情况下具有键值对resource.labels.key和resource.labels.value
I need to the update resource.labels which is a repeated record field and has a key value pair resource.labels.key and resource.labels.value on this condition
where key="machinetype" and value="N/A" set value="g1.small"
我已经尝试过了
update `metrics` set resource.labels.value=ARRAY(SELECT AS STRUCT * REPLACE("g1.small" as value) from UNNEST(resource.labels) as h where h.key="machinetype" and h.value="N/A") where resource.labels.key="machinetype" and resource.labels.value="N/A"
但出现此错误:
Cannot access field key on a value with type ARRAY<STRUCT<key STRING, value STRING>> at [1:241]
有人可以提出任何建议吗?谢谢.
can anyone give any suggestions? Thanks.
推荐答案
尝试以下操作-应该可以
Try below- should work
UPDATE `project.dataset.metrics`
SET resource = (
SELECT AS STRUCT * REPLACE(
ARRAY(
SELECT AS STRUCT key,
IF(key='machinetype' and value='N/A', 'g1.small', value) as value
FROM t.labels
) AS labels)
FROM UNNEST([resource]) t
)
WHERE true
这篇关于使用Bigquery中的where条件更新嵌套记录的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!
查看全文