Hi everyone, I raised this JIRA ticket back in July: https://issues.apache.org/jira/browse/SPARK-9435
The problem is that it seems Spark SQL doesn't recognise columns we transform with a UDF when referenced in the GROUP BY clause. There's a minimal reproduction Java file attached to illustrate the issue. The equivalent code from Scala seems to work fine for me. Is anyone else seeing this problem? For us, the attached code fails every time on Spark 1.4.1 Thanks, James
