[SPARK-20710][SQL] Support aliases in CUBE/ROLLUP/GROUPING SETS

sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala

@@ -1003,18 +1003,30 @@ class Analyzer(
    */
   object ResolveAggAliasInGroupBy extends Rule[LogicalPlan] {
 
+    // This is a strict check though, we put this to apply the rule only in alias expressions
+    private def notResolvableByChild(attrName: String, child: LogicalPlan): Boolean =
+      !child.output.exists(a => resolver(a.name, attrName))
+
     override def apply(plan: LogicalPlan): LogicalPlan = plan.resolveOperators {
       case agg @ Aggregate(groups, aggs, child)
           if conf.groupByAliases && child.resolved && aggs.forall(_.resolved) &&
-            groups.exists(_.isInstanceOf[UnresolvedAttribute]) =>
-        // This is a strict check though, we put this to apply the rule only in alias expressions
-        def notResolvableByChild(attrName: String): Boolean =
-          !child.output.exists(a => resolver(a.name, attrName))
-        agg.copy(groupingExpressions = groups.map {
-          case u: UnresolvedAttribute if notResolvableByChild(u.name) =>
+            groups.exists(!_.resolved) =>
+        agg.copy(groupingExpressions = groups.map { _.transform {
+            case u: UnresolvedAttribute if notResolvableByChild(u.name, child) =>
+              aggs.find(ne => resolver(ne.name, u.name)).getOrElse(u)
+          }
+        })
+
+      case gs @ GroupingSets(selectedGroups, groups, child, aggs)
+          if conf.groupByAliases && child.resolved && aggs.forall(_.resolved) &&
+            (selectedGroups :+ groups).exists(_.exists(_.isInstanceOf[UnresolvedAttribute])) =>
+        def mayResolveAttrByAggregateExprs(exprs: Seq[Expression]): Seq[Expression] = exprs.map {
+          case u: UnresolvedAttribute if notResolvableByChild(u.name, child) =>
             aggs.find(ne => resolver(ne.name, u.name)).getOrElse(u)
           case e => e
-        })
+        }
+        gs.copy(selectedGroupByExprs = selectedGroups.map(mayResolveAttrByAggregateExprs),
+          groupByExprs = mayResolveAttrByAggregateExprs(groups))
     }
   }
 

sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicLogicalOperators.scala

@@ -704,7 +704,7 @@ case class Expand(
  * We will transform GROUPING SETS into logical plan Aggregate(.., Expand) in Analyzer
  *
  * @param selectedGroupByExprs A sequence of selected GroupBy expressions, all exprs should
- *                     exists in groupByExprs.
+ *                     exist in groupByExprs.
  * @param groupByExprs The Group By expressions candidates.
  * @param child        Child operator
  * @param aggregations The Aggregation expressions, those non selected group by expressions

sql/core/src/test/resources/sql-tests/inputs/group-analytics.sql

@@ -54,4 +54,9 @@ SELECT course, year, GROUPING_ID(course, year) FROM courseSales GROUP BY CUBE(co
 ORDER BY GROUPING(course), GROUPING(year), course, year;
 SELECT course, year FROM courseSales GROUP BY course, year ORDER BY GROUPING(course);
 SELECT course, year FROM courseSales GROUP BY course, year ORDER BY GROUPING_ID(course);
-SELECT course, year FROM courseSales GROUP BY CUBE(course, year) ORDER BY grouping__id;
+SELECT course, year FROM courseSales GROUP BY CUBE(course, year) ORDER BY grouping__id;
+
+-- Aliases in SELECT could be used in ROLLUP/CUBE/GROUPING SETS
+SELECT a + b AS k1, b AS k2, SUM(a - b) FROM testData GROUP BY CUBE(k1, k2);
+SELECT a + b AS k, b, SUM(a - b) FROM testData GROUP BY ROLLUP(k, b);
+SELECT a + b, b AS k, SUM(a - b) FROM testData GROUP BY a + b, k GROUPING SETS(k)

sql/core/src/test/resources/sql-tests/results/group-analytics.sql.out

@@ -1,5 +1,5 @@
 -- Automatically generated by SQLQueryTestSuite
--- Number of queries: 26
+-- Number of queries: 29
 
 
 -- !query 0
@@ -328,3 +328,50 @@ struct<>
 -- !query 25 output
 org.apache.spark.sql.AnalysisException
 grouping__id is deprecated; use grouping_id() instead;
+
+
+-- !query 26
+SELECT a + b AS k1, b AS k2, SUM(a - b) FROM testData GROUP BY CUBE(k1, k2)
+-- !query 26 schema
+struct<k1:int,k2:int,sum((a - b)):bigint>
+-- !query 26 output
+2	1	0
+2	NULL	0
+3	1	1
+3	2	-1
+3	NULL	0
+4	1	2
+4	2	0
+4	NULL	2
+5	2	1
+5	NULL	1
+NULL	1	3
+NULL	2	0
+NULL	NULL	3
+
+
+-- !query 27
+SELECT a + b AS k, b, SUM(a - b) FROM testData GROUP BY ROLLUP(k, b)
+-- !query 27 schema
+struct<k:int,b:int,sum((a - b)):bigint>
+-- !query 27 output
+2	1	0
+2	NULL	0
+3	1	1
+3	2	-1
+3	NULL	0
+4	1	2
+4	2	0
+4	NULL	2
+5	2	1
+5	NULL	1
+NULL	NULL	3
+
+
+-- !query 28
+SELECT a + b, b AS k, SUM(a - b) FROM testData GROUP BY a + b, k GROUPING SETS(k)
+-- !query 28 schema
+struct<(a + b):int,k:int,sum((a - b)):bigint>
+-- !query 28 output
+NULL	1	3
+NULL	2	0