/*
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* regarding copyright ownership. Some portions may be licensed
* to Red Hat, Inc. under one or more contributor license agreements.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
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*/
package org.teiid.query.optimizer.relational.rules;
import java.util.ArrayList;
import java.util.List;
import org.teiid.query.optimizer.relational.plantree.NodeConstants;
import org.teiid.query.optimizer.relational.plantree.NodeFactory;
import org.teiid.query.optimizer.relational.plantree.PlanNode;
import org.teiid.query.optimizer.relational.rules.JoinRegion;
import org.teiid.query.optimizer.relational.rules.RulePlanJoins;
import org.teiid.query.sql.lang.JoinType;
import junit.framework.TestCase;
public class TestJoinRegion extends TestCase {
public void testFindJoinRegions() {
List regions = new ArrayList();
PlanNode joinRoot = TestFrameUtil.getExamplePlan();
PlanNode joinRoot1 = TestFrameUtil.getExamplePlan();
PlanNode outerJoin = NodeFactory.getNewNode(NodeConstants.Types.JOIN);
outerJoin.setProperty(NodeConstants.Info.JOIN_TYPE, JoinType.JOIN_LEFT_OUTER);
outerJoin.addFirstChild(joinRoot);
outerJoin.addFirstChild(joinRoot1);
PlanNode source = NodeFactory.getNewNode(NodeConstants.Types.SOURCE);
source.addFirstChild(outerJoin);
RulePlanJoins.findJoinRegions(source, null, regions);
assertEquals(3, regions.size());
JoinRegion region = (JoinRegion)regions.get(0);
//ensure that the first region is the trivial region of the outer join
assertEquals(1, region.getJoinSourceNodes().size());
}
public void testReconstruction() {
List regions = new ArrayList();
PlanNode joinRoot = TestFrameUtil.getExamplePlan();
PlanNode source = NodeFactory.getNewNode(NodeConstants.Types.SOURCE);
source.addFirstChild(joinRoot);
RulePlanJoins.findJoinRegions(source, null, regions);
assertEquals(1, regions.size());
JoinRegion region = (JoinRegion)regions.get(0);
assertEquals(3, region.getJoinSourceNodes().size());
assertEquals(joinRoot, region.getJoinRoot());
region.changeJoinOrder(new Object[] {new Integer(1), new Integer(0), new Integer(2)});
region.reconstructJoinRegoin();
PlanNode root = region.getJoinRoot();
assertEquals(NodeConstants.Types.JOIN, root.getFirstChild().getType());
//the tree is now left linear so go down a couple of levels to get to the first source
assertEquals(NodeConstants.Types.SOURCE, root.getFirstChild().getFirstChild().getFirstChild().getType());
}
/**
* Simple test to ensure that the reconstruction logic doesn't fail with a single source
*/
public void testReconstructionOf1Source() {
PlanNode source = NodeFactory.getNewNode(NodeConstants.Types.SOURCE);
PlanNode accessNode = NodeFactory.getNewNode(NodeConstants.Types.ACCESS);
source.addFirstChild(accessNode);
JoinRegion region = new JoinRegion();
region.addJoinSourceNode(accessNode);
region.reconstructJoinRegoin();
assertEquals(NodeConstants.Types.ACCESS, region.getJoinRoot().getType());
}
}