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https://issues.apache.org/jira/browse/SPARK-8956?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14624121#comment-14624121
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Cheng Hao commented on SPARK-8956:
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Sorry, I didn't notice this jira issue when I created this issue SPARK-8972.
> Rollup produces incorrect result when group by contains expressions
> -------------------------------------------------------------------
>
> Key: SPARK-8956
> URL: https://issues.apache.org/jira/browse/SPARK-8956
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 1.4.0
> Reporter: Yana Kadiyska
>
> Rollup produces incorrect results when group clause contains an expression
> {code}case class KeyValue(key: Int, value: String)
> val df = sc.parallelize(1 to 50).map(i=>KeyValue(i, i.toString)).toDF
> df.registerTempTable("foo")
> sqlContext.sql(“select count(*) as cnt, key % 100 as key,GROUPING__ID from
> foo group by key%100 with rollup”).show(100)
> {code}
> As a workaround, this works correctly:
> {code}
> val df1=df.withColumn("newkey",df("key")%100)
> df1.registerTempTable("foo1")
> sqlContext.sql("select count(*) as cnt, newkey as key,GROUPING__ID as grp
> from foo1 group by newkey with rollup").show(100)
> {code}
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