Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/11283#discussion_r54821287
--- Diff:
sql/hive/src/main/scala/org/apache/spark/sql/hive/SQLBuilder.scala ---
@@ -211,6 +215,71 @@ class SQLBuilder(logicalPlan: LogicalPlan, sqlContext:
SQLContext) extends Loggi
)
}
+ private def groupingSetToSQL(
+ plan: Aggregate,
+ expand: Expand,
+ project: Project): String = {
+ // In cube/rollup/groupingsets, Analyzer creates new aliases for all
group by expressions.
+ // Since conversion from attribute back SQL ignore expression IDs, the
alias of attribute
+ // references are ignored in aliasMap
+ val aliasMap = AttributeMap(project.projectList.collect {
+ case a @ Alias(child, name) if
!child.isInstanceOf[AttributeReference] => (a.toAttribute, a)
+ })
+
+ val groupingExprs = plan.groupingExpressions.filterNot {
+ // VirtualColumn.groupingIdName is added by Analyzer, and thus
remove it.
+ case a: NamedExpression => a.name == VirtualColumn.groupingIdName
+ case o => false
+ }.map {
+ case a: AttributeReference if aliasMap.contains(a) =>
aliasMap(a).child
+ case o => o
+ }
+
--- End diff --
I think the `groupingExpressions` must be all `Attribute`, see
https://github.com/apache/spark/blob/master/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala#L302-L305
. Did I miss something here?
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