AngersZhuuuu opened a new pull request #30199:
URL: https://github.com/apache/spark/pull/30199
### What changes were proposed in this pull request?
Nested grouping. analytics can't run but throw ambiguous exception, This pr
make these case throw exceptions that are easy for users to understand
```
spark-sql> select a, b, c from x group by cube(a, b) with cube;;
20/10/30 12:20:20 ERROR SparkSQLDriver: Failed in [ select a, b, c from x
group by cube(a, b) with cube]
java.lang.UnsupportedOperationException
at
org.apache.spark.sql.catalyst.expressions.GroupingSet.dataType(grouping.scala:36)
at
org.apache.spark.sql.catalyst.expressions.GroupingSet.dataType$(grouping.scala:36)
at
org.apache.spark.sql.catalyst.expressions.Cube.dataType(grouping.scala:61)
spark-sql> select a, b, c from x group by cube(a, b, c) grouping sets(a, b,
(a, b));
Error in query: unresolved operator 'GroupingSets [ArrayBuffer(a#0),
ArrayBuffer(b#1), ArrayBuffer(a#0, b#1)], [cube(a#0, b#1, c#2)], [a#0, b#1,
c#2];;
'GroupingSets [ArrayBuffer(a#0), ArrayBuffer(b#1), ArrayBuffer(a#0, b#1)],
[cube(a#0, b#1, c#2)], [a#0, b#1, c#2]
+- SubqueryAlias spark_catalog.default.x
+- HiveTableRelation [`default`.`x`,
org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe, Data Cols: [a#0, b#1, c#2],
Partition Cols: []]
spark-sql> select a, b, c from x group by a, b, c grouping sets(a, b,
cube(a, b));
Error in query: unresolved operator 'GroupingSets [ArrayBuffer(a#3),
ArrayBuffer(b#4), ArrayBuffer(cube(a#3, b#4))], [a#3, b#4, c#5], [a#3, b#4,
c#5];;
'GroupingSets [ArrayBuffer(a#3), ArrayBuffer(b#4), ArrayBuffer(cube(a#3,
b#4))], [a#3, b#4, c#5], [a#3, b#4, c#5]
+- SubqueryAlias spark_catalog.default.x
+- HiveTableRelation [`default`.`x`,
org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe, Data Cols: [a#3, b#4, c#5],
Partition Cols: []]
```
### Why are the changes needed?
Throw an exception that is easy for the user to understand
### Does this PR introduce _any_ user-facing change?
No
### How was this patch tested?
Add UT
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