beliefer opened a new pull request #32513:
URL: https://github.com/apache/spark/pull/32513


   ### What changes were proposed in this pull request?
   Currently, Spark doesn't support `LeafRunnableCommand` as sub query.
   Because the `LeafRunnableCommand` always output `GenericInternalRow` and 
some node(e.g. `SortExec`, `AdaptiveExecutionExec`, `WholeCodegenExec`) will 
convert `GenericInternalRow` to `UnsafeRow`. So will causes error as follows:
   
   ```
   java.lang.ClassCastException
   org.apache.spark.sql.catalyst.expressions.GenericInternalRow cannot be cast 
to org.apache.spark.sql.catalyst.expressions.UnsafeRow
   ```
   
   
   ### Why are the changes needed?
   Complete query some DDL with CTES.
   
   
   ### Does this PR introduce _any_ user-facing change?
   'Yes'. After this PR, we can support more syntax when query with CTE.
   
   
   ### How was this patch tested?
   New tests.
   


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