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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
/* Implicit conversions */
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.logical._
import org.apache.spark.sql.catalyst.plans.PlanTest
import org.apache.spark.sql.catalyst.rules._
class LikeSimplificationSuite extends PlanTest {
object Optimize extends RuleExecutor[LogicalPlan] {
val batches =
Batch("Like Simplification", Once,
LikeSimplification) :: Nil
}
val testRelation = LocalRelation('a.string)
test("simplify Like into StartsWith") {
val originalQuery =
testRelation
.where(('a like "abc%") || ('a like "abc\\%"))
val optimized = Optimize.execute(originalQuery.analyze)
val correctAnswer = testRelation
.where(StartsWith('a, "abc") || ('a like "abc\\%"))
.analyze
comparePlans(optimized, correctAnswer)
}
test("simplify Like into EndsWith") {
val originalQuery =
testRelation
.where('a like "%xyz")
val optimized = Optimize.execute(originalQuery.analyze)
val correctAnswer = testRelation
.where(EndsWith('a, "xyz"))
.analyze
comparePlans(optimized, correctAnswer)
}
test("simplify Like into startsWith and EndsWith") {
val originalQuery =
testRelation
.where(('a like "abc\\%def") || ('a like "abc%def"))
val optimized = Optimize.execute(originalQuery.analyze)
val correctAnswer = testRelation
.where(('a like "abc\\%def") ||
(Length('a) >= 6 && (StartsWith('a, "abc") && EndsWith('a, "def"))))
.analyze
comparePlans(optimized, correctAnswer)
}
test("simplify Like into Contains") {
val originalQuery =
testRelation
.where(('a like "%mn%") || ('a like "%mn\\%"))
val optimized = Optimize.execute(originalQuery.analyze)
val correctAnswer = testRelation
.where(Contains('a, "mn") || ('a like "%mn\\%"))
.analyze
comparePlans(optimized, correctAnswer)
}
test("simplify Like into EqualTo") {
val originalQuery =
testRelation
.where(('a like "") || ('a like "abc"))
val optimized = Optimize.execute(originalQuery.analyze)
val correctAnswer = testRelation
.where(('a === "") || ('a === "abc"))
.analyze
comparePlans(optimized, correctAnswer)
}
}
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