[英]Big Query - Asserts with CTEs?
有没有办法在下面的查询中插入“断言”? (不正确的语法)
WITH
NAMES as ( SELECT 'Joe' as boy, 'Laura' as girl )
ASSERT SELECT boy FROM NAMES != 'Karl' as 'Invalid name'
SELECT * FROM NAMES
如果您不介意添加更多列,则可以执行以下操作:
WITH
NAMES as ( SELECT 'Joe' as boy, 'Laura' as girl )
SELECT *, IF(boy = 'Karl', Error('Invalid name'), NULL) AS asserts FROM NAMES
如果这样做,您可以排除该列,如:
SELECT * EXCEPT(asserts) FROM (
WITH
NAMES as ( SELECT 'Joe' as boy, 'Laura' as girl )
SELECT *, IF(boy = 'Joe', Error('Invalid name'), NULL) AS asserts FROM NAMES
)
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.