amaliujia commented on code in PR #38908:
URL: https://github.com/apache/spark/pull/38908#discussion_r1039156011


##########
python/pyspark/sql/connect/dataframe.py:
##########
@@ -137,7 +137,13 @@ def isEmpty(self) -> bool:
         return len(self.take(1)) == 0
 
     def select(self, *cols: "ColumnOrName") -> "DataFrame":
-        return DataFrame.withPlan(plan.Project(self._plan, *cols), 
session=self._session)
+        sql_expr = []
+        for element in cols:
+            if isinstance(element, str):
+                sql_expr.append(sql_expression(element))

Review Comment:
   This is something I am not sure for Python (PySpark):
   
   `spark.range(10).groupBy("id").sum("id").select("sum(id)")` this works in 
PySpark.



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