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Posted to reviews@spark.apache.org by GitBox <gi...@apache.org> on 2019/08/05 14:51:26 UTC
[GitHub] [spark] skonto commented on issue #25362:
[SPARK-27921][PYTHON][SQL][TESTS][FOLLOW-UP] Add UDF cases into group by
clause in 'udf-group-analytics.sql'
skonto commented on issue #25362: [SPARK-27921][PYTHON][SQL][TESTS][FOLLOW-UP] Add UDF cases into group by clause in 'udf-group-analytics.sql'
URL: https://github.com/apache/spark/pull/25362#issuecomment-518266785
@HyukjinKwon fyi. One thing I noticed is that:
```
-SELECT a, b, SUM(b) FROM testData GROUP BY a, b WITH ROLLUP
+SELECT a, b, udf(SUM(b)) FROM testData GROUP BY udf(a), b WITH ROLLUP
-- !query 4 schema
-struct<a:int,b:int,sum(b):bigint>
+struct<>
-- !query 4 output
-1 1 1
-1 2 2
-1 NULL 3
-2 1 1
-2 2 2
-2 NULL 3
-3 1 1
-3 2 2
-3 NULL 3
-NULL NULL 9
+org.apache.spark.sql.AnalysisException
+expression 'testdata.`a`' is neither present in the group by, nor is it an aggregate function. Add to group by or wrap in first() (or first_value) if you don't care which value you get.;
```
Shouldnt this be allowed?
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