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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.spark.sql.catalyst.optimizer
import org.apache.spark.sql.catalyst.analysis.EliminateSubqueryAliases
import org.apache.spark.sql.catalyst.dsl.expressions._
import org.apache.spark.sql.catalyst.dsl.plans._
import org.apache.spark.sql.catalyst.expressions._
import org.apache.spark.sql.catalyst.plans._
import org.apache.spark.sql.catalyst.plans.logical._
import org.apache.spark.sql.catalyst.rules._
class PruneFiltersSuite extends PlanTest {
object Optimize extends RuleExecutor[LogicalPlan] {
val batches =
Batch("Subqueries", Once,
EliminateSubqueryAliases) ::
Batch("Filter Pushdown and Pruning", Once,
CombineFilters,
PruneFilters,
PushDownPredicate,
PushPredicateThroughJoin) :: Nil
}
val testRelation = LocalRelation('a.int, 'b.int, 'c.int)
test("Constraints of isNull + LeftOuter") {
val x = testRelation.subquery('x)
val y = testRelation.subquery('y)
val query = x.where("x.b".attr.isNull).join(y, LeftOuter)
val queryWithUselessFilter = query.where("x.b".attr.isNull)
val optimized = Optimize.execute(queryWithUselessFilter.analyze)
val correctAnswer = query.analyze
comparePlans(optimized, correctAnswer)
}
test("Constraints of unionall") {
val tr1 = LocalRelation('a.int, 'b.int, 'c.int)
val tr2 = LocalRelation('d.int, 'e.int, 'f.int)
val tr3 = LocalRelation('g.int, 'h.int, 'i.int)
val query =
tr1.where('a.attr > 10)
.union(tr2.where('d.attr > 10)
.union(tr3.where('g.attr > 10)))
val queryWithUselessFilter = query.where('a.attr > 10)
val optimized = Optimize.execute(queryWithUselessFilter.analyze)
val correctAnswer = query.analyze
comparePlans(optimized, correctAnswer)
}
test("Pruning multiple constraints in the same run") {
val tr1 = LocalRelation('a.int, 'b.int, 'c.int).subquery('tr1)
val tr2 = LocalRelation('a.int, 'd.int, 'e.int).subquery('tr2)
val query = tr1
.where("tr1.a".attr > 10 || "tr1.c".attr < 10)
.join(tr2.where('d.attr < 100), Inner, Some("tr1.a".attr === "tr2.a".attr))
// different order of "tr2.a" and "tr1.a"
val queryWithUselessFilter =
query.where(
("tr1.a".attr > 10 || "tr1.c".attr < 10) &&
'd.attr < 100 &&
"tr2.a".attr === "tr1.a".attr)
val optimized = Optimize.execute(queryWithUselessFilter.analyze)
val correctAnswer = query.analyze
comparePlans(optimized, correctAnswer)
}
test("Partial pruning") {
val tr1 = LocalRelation('a.int, 'b.int, 'c.int).subquery('tr1)
val tr2 = LocalRelation('a.int, 'd.int, 'e.int).subquery('tr2)
// One of the filter condition does not exist in the constraints of its child
// Thus, the filter is not removed
val query = tr1
.where("tr1.a".attr > 10)
.join(tr2.where('d.attr < 100), Inner, Some("tr1.a".attr === "tr2.d".attr))
val queryWithExtraFilters =
query.where("tr1.a".attr > 10 && 'd.attr < 100 && "tr1.a".attr === "tr2.a".attr)
val optimized = Optimize.execute(queryWithExtraFilters.analyze)
val correctAnswer = tr1
.where("tr1.a".attr > 10)
.join(tr2.where('d.attr < 100),
Inner,
Some("tr1.a".attr === "tr2.a".attr && "tr1.a".attr === "tr2.d".attr)).analyze
comparePlans(optimized, correctAnswer)
}
test("No predicate is pruned") {
val x = testRelation.subquery('x)
val y = testRelation.subquery('y)
val query = x.where("x.b".attr.isNull).join(y, LeftOuter)
val queryWithExtraFilters = query.where("x.b".attr.isNotNull)
val optimized = Optimize.execute(queryWithExtraFilters.analyze)
val correctAnswer =
testRelation.where("b".attr.isNull).where("b".attr.isNotNull)
.join(testRelation, LeftOuter).analyze
comparePlans(optimized, correctAnswer)
}
test("Nondeterministic predicate is not pruned") {
val originalQuery = testRelation.where(Rand(10) > 5).select('a).where(Rand(10) > 5).analyze
val optimized = Optimize.execute(originalQuery)
val correctAnswer = testRelation.where(Rand(10) > 5).where(Rand(10) > 5).select('a).analyze
comparePlans(optimized, correctAnswer)
}
}
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