Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/11283#discussion_r54843075
--- Diff:
sql/hive/src/main/scala/org/apache/spark/sql/hive/SQLBuilder.scala ---
@@ -211,6 +215,65 @@ class SQLBuilder(logicalPlan: LogicalPlan, sqlContext:
SQLContext) extends Loggi
)
}
+ private def groupingSetToSQL(
+ plan: Aggregate,
+ expand: Expand,
+ project: Project): String = {
+ require(plan.groupingExpressions.length > 1)
+
+ // The last column of Expand is always grouping ID
+ val gid = expand.output.last
+
+ val groupByAttributes =
plan.groupingExpressions.dropRight(1).map(_.asInstanceOf[Attribute])
+ val groupByExprs =
+
project.projectList.drop(project.child.output.length).map(_.asInstanceOf[Alias].child)
+ val groupByAttrMap = AttributeMap(groupByAttributes.zip(groupByExprs))
+ val groupingSQL = groupByExprs.map(_.sql).mkString(", ")
+
+ val groupingSet = expand.projections.map { project =>
+ project.dropRight(1).collect {
+ case attr: Attribute if groupByAttrMap.contains(attr) =>
groupByAttrMap(attr)
+ }
+ }
+ val groupingSetSQL =
+ "GROUPING SETS(" +
+ groupingSet.map(e => s"(${e.map(_.sql).mkString(",
")})").mkString(", ") + ")"
+
+ val aggExprs = plan.aggregateExpressions.map { case expr =>
+ expr.transformDown {
+ case a @ Alias(child: AttributeReference, name) if child eq gid =>
--- End diff --
Yeah, for getting the alias name.
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at [email protected] or file a JIRA ticket
with INFRA.
---
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
