Github user cenyuhai commented on the issue:
https://github.com/apache/spark/pull/18270
why failed? Couldn't I add order byï¼
```java
org.scalatest.exceptions.TestFailedException: Expected "...Y CUBE(course,
year)[ ORDER BY grouping__id, course, year]", but got "...Y CUBE(course,
year)[]" SQL query did not match for query #16 SELECT course, year,
grouping__id FROM courseSales GROUP BY CUBE(course, year) ORDER BY
grouping__id, course, year
```
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