[GitHub] [spark] viirya commented on issue #25215: [SPARK-28445][SQL][PYTHON] Fix error when PythonUDF is used in both group by and aggregate expression

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viirya commented on issue #25215: [SPARK-28445][SQL][PYTHON] Fix error when PythonUDF is used in both group by and aggregate expression
URL: https://github.com/apache/spark/pull/25215#issuecomment-518884995
 
 
   @shivusondur @HyukjinKwon The analysis exception by adding udf to group by, is caused by SPARK-28386, SPARK-26741.
   
   ```
   == Analyzed Logical Plan ==
   org.apache.spark.sql.AnalysisException: cannot resolve '`b`' given input columns: [CAST(udf(cast(b as string)) AS INT), CAST(udf(cast(c as string)) AS STRING)]; line 2 pos 63;
   'Sort ['udf('b) ASC NULLS FIRST, 'udf('c) ASC NULLS FIRST], true
   +- Project [CAST(udf(cast(b as string)) AS INT)#x, CAST(udf(cast(c as string)) AS STRING)#x]
      +- Filter (cast(udf(cast(count(1)#xL as string)) as bigint) = cast(1 as bigint))
         +- Aggregate [cast(udf(cast(b#x as string)) as int), cast(udf(cast(c#x as string)) as string)], [cast(udf(cast(b#x as string)) as int) AS CAST(udf(cast(b as string)) AS INT)#x, cast(udf(cast(c#x as string)) as string) AS CAST(udf(cast(c as string)) AS STRING)#x, count(1) AS count(1)#xL]
            +- SubqueryAlias `default`.`test_having`
               +- Relation[a#x,b#x,c#x,d#x] parquet
   ```

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