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HintAcceptanceTest.scala
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HintAcceptanceTest.scala
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/*
* Copyright (c) 2002-2018 "Neo Technology,"
* Network Engine for Objects in Lund AB [http://neotechnology.com]
*
* This file is part of Neo4j.
*
* Neo4j is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.neo4j.internal.cypher.acceptance
import org.neo4j.cypher.ExecutionEngineFunSuite
import org.neo4j.internal.cypher.acceptance.CypherComparisonSupport.{ComparePlansWithAssertion, Configs}
import scala.collection.Map
class HintAcceptanceTest
extends ExecutionEngineFunSuite with CypherComparisonSupport {
test("should use a simple hint") {
val query = "MATCH (a)--(b)--(c) USING JOIN ON b RETURN a,b,c"
executeWith(Configs.AllExceptSlotted, query,
planComparisonStrategy = ComparePlansWithAssertion(_ should useOperators("NodeHashJoin"),
expectPlansToFail = Configs.AllRulePlanners))
}
test("should not plan multiple joins for one hint") {
val a = createLabeledNode(Map[String, Any]("name" -> "a"), "A")
for(i <- 0 until 10) {
val b = createLabeledNode(Map[String, Any]("name" -> s"${i}b"), "B")
relate(a, b)
}
val query = """MATCH (a:A)
|OPTIONAL MATCH (a)-->(b:B)
|USING JOIN ON a
|RETURN a.name, b.name""".stripMargin
executeWith(Configs.CommunityInterpreted - Configs.Cost2_3 - Configs.Cost3_1, query,
planComparisonStrategy = ComparePlansWithAssertion((p) => {
p should useOperators("NodeOuterHashJoin")
p should not(useOperators("NodeHashJoin"))
}, expectPlansToFail = Configs.AllRulePlanners + Configs.Cost2_3 + Configs.Cost3_1))
}
}