diff options
2 files changed, 44 insertions, 2 deletions
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala index 0da081ed1a..1a75fcf354 100644 --- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala +++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala @@ -119,6 +119,15 @@ object ColumnPruning extends Rule[LogicalPlan] { case a @ Aggregate(_, _, child) if (child.outputSet -- a.references).nonEmpty => a.copy(child = Project(a.references.toSeq, child)) + case p @ Project(projectList, a @ Aggregate(groupingExpressions, aggregateExpressions, child)) + if (a.outputSet -- p.references).nonEmpty => + Project( + projectList, + Aggregate( + groupingExpressions, + aggregateExpressions.filter(e => p.references.contains(e)), + child)) + // Eliminate unneeded attributes from either side of a Join. case Project(projectList, Join(left, right, joinType, condition)) => // Collect the list of all references required either above or to evaluate the condition. diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/optimizer/FilterPushdownSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/optimizer/FilterPushdownSuite.scala index 0b74bacb18..55c6766520 100644 --- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/optimizer/FilterPushdownSuite.scala +++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/optimizer/FilterPushdownSuite.scala @@ -19,7 +19,7 @@ package org.apache.spark.sql.catalyst.optimizer import org.apache.spark.sql.catalyst.analysis import org.apache.spark.sql.catalyst.analysis.EliminateSubQueries -import org.apache.spark.sql.catalyst.expressions.Explode +import org.apache.spark.sql.catalyst.expressions.{Count, Explode} import org.apache.spark.sql.catalyst.plans.logical._ import org.apache.spark.sql.catalyst.plans.{PlanTest, LeftOuter, RightOuter} import org.apache.spark.sql.catalyst.rules._ @@ -37,7 +37,8 @@ class FilterPushdownSuite extends PlanTest { CombineFilters, PushPredicateThroughProject, PushPredicateThroughJoin, - PushPredicateThroughGenerate) :: Nil + PushPredicateThroughGenerate, + ColumnPruning) :: Nil } val testRelation = LocalRelation('a.int, 'b.int, 'c.int) @@ -58,6 +59,38 @@ class FilterPushdownSuite extends PlanTest { comparePlans(optimized, correctAnswer) } + test("column pruning for group") { + val originalQuery = + testRelation + .groupBy('a)('a, Count('b)) + .select('a) + + val optimized = Optimize(originalQuery.analyze) + val correctAnswer = + testRelation + .select('a) + .groupBy('a)('a) + .select('a).analyze + + comparePlans(optimized, correctAnswer) + } + + test("column pruning for group with alias") { + val originalQuery = + testRelation + .groupBy('a)('a as 'c, Count('b)) + .select('c) + + val optimized = Optimize(originalQuery.analyze) + val correctAnswer = + testRelation + .select('a) + .groupBy('a)('a as 'c) + .select('c).analyze + + comparePlans(optimized, correctAnswer) + } + // After this line is unimplemented. test("simple push down") { val originalQuery = |