viirya opened a new issue, #760:
URL: https://github.com/apache/datafusion-comet/issues/760
### Describe the bug
Found this bug during fixing Spark SQL test failure in
`org.apache.spark.sql.connector.KeyGroupedPartitioningSuite` for #651.
```
[info] - SPARK-44647: shuffle one side and join keys are less than partition
keys *** FAILED *** (24 milliseconds)
[info] java.lang.IllegalStateException: Exchange not implemented for
KeyGroupedPartitioning(List(item_id#9849L),3,List([1], [3], [4]),List())
```
### Steps to reproduce
_No response_
### Expected behavior
_No response_
### Additional context
_No response_
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