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HepPlannerTest.java
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HepPlannerTest.java
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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.shardingsphere.infra.optimizer.planner;
import com.google.common.collect.ImmutableList;
import org.apache.calcite.config.Lex;
import org.apache.calcite.plan.RelOptCostImpl;
import org.apache.calcite.plan.RelOptUtil;
import org.apache.calcite.plan.hep.HepPlanner;
import org.apache.calcite.plan.hep.HepProgram;
import org.apache.calcite.plan.hep.HepProgramBuilder;
import org.apache.calcite.rel.RelNode;
import org.apache.calcite.rel.rules.CoreRules;
import org.apache.calcite.sql.SqlExplainFormat;
import org.apache.calcite.sql.SqlExplainLevel;
import org.apache.calcite.sql.SqlNode;
import org.apache.calcite.sql.parser.SqlParseException;
import org.apache.calcite.sql.parser.SqlParser;
import org.apache.shardingsphere.infra.metadata.schema.ShardingSphereSchema;
import org.apache.shardingsphere.infra.optimizer.converter.RelNodeConverter;
import org.apache.shardingsphere.infra.optimizer.schema.AbstractSchemaTest;
import org.junit.Before;
import org.junit.Test;
public class HepPlannerTest extends AbstractSchemaTest {
RelNodeConverter relNodeConverter;
@Before
public void init() {
ShardingSphereSchema schema = buildSchema();
relNodeConverter = new RelNodeConverter("logical_db", schema);
}
@Test
public void test() throws SqlParseException {
String sql = "select o1.order_id, o1.order_id, o1.user_id, o2.status from t_order o1 join t_order_item o2 on "
+ "o1.order_id = o2.order_id where o1.status='FINISHED' and o2.order_item_id > 1024 and 1=1";
SqlParser parser = SqlParser.create(sql, SqlParser.config().withLex(Lex.MYSQL));
SqlNode sqlNode = parser.parseQuery();
RelNode logicalRelNode = relNodeConverter.validateAndConvert(sqlNode);
HepProgramBuilder hepProgramBuilder = HepProgram.builder();
hepProgramBuilder.addGroupBegin();
hepProgramBuilder.addRuleCollection(ImmutableList.of(CoreRules.FILTER_INTO_JOIN));
hepProgramBuilder.addGroupEnd();
HepPlanner hepPlanner = new HepPlanner(hepProgramBuilder.build(), null, true, null, RelOptCostImpl.FACTORY);
hepPlanner.setRoot(logicalRelNode);
RelNode best = hepPlanner.findBestExp();
String planStr;
planStr = RelOptUtil.dumpPlan("origin", logicalRelNode, SqlExplainFormat.TEXT, SqlExplainLevel.EXPPLAN_ATTRIBUTES);
System.out.println(planStr);
planStr = RelOptUtil.dumpPlan("best", best, SqlExplainFormat.TEXT, SqlExplainLevel.EXPPLAN_ATTRIBUTES);
System.out.println(planStr);
}
@Test
public void testConvertFilterToCalc() throws SqlParseException {
String sql = "select order_id, user_id,status from t_order where t_order.status='FINISHED'";
SqlParser parser = SqlParser.create(sql, SqlParser.config().withLex(Lex.MYSQL));
SqlNode sqlNode = parser.parseQuery();
RelNode logicalRelNode = relNodeConverter.validateAndConvert(sqlNode);
HepProgramBuilder hepProgramBuilder = HepProgram.builder();
hepProgramBuilder.addGroupBegin();
hepProgramBuilder.addRuleCollection(ImmutableList.of(CoreRules.FILTER_TO_CALC));
hepProgramBuilder.addGroupEnd();
HepPlanner hepPlanner = new HepPlanner(hepProgramBuilder.build(), null, true, null, RelOptCostImpl.FACTORY);
hepPlanner.setRoot(logicalRelNode);
RelNode best = hepPlanner.findBestExp();
String planStr;
planStr = RelOptUtil.dumpPlan("origin", logicalRelNode, SqlExplainFormat.TEXT, SqlExplainLevel.EXPPLAN_ATTRIBUTES);
System.out.println(planStr);
planStr = RelOptUtil.dumpPlan("best", best, SqlExplainFormat.TEXT, SqlExplainLevel.EXPPLAN_ATTRIBUTES);
System.out.println(planStr);
}
@Test
public void testConvertProjectAndFilterToCalc() throws SqlParseException {
String sql = "select order_id, user_id,status from t_order where t_order.status='FINISHED'";
SqlParser parser = SqlParser.create(sql, SqlParser.config().withLex(Lex.MYSQL));
SqlNode sqlNode = parser.parseQuery();
RelNode logicalRelNode = relNodeConverter.validateAndConvert(sqlNode);
HepProgramBuilder hepProgramBuilder = HepProgram.builder();
hepProgramBuilder.addGroupBegin();
hepProgramBuilder.addRuleCollection(ImmutableList.of(CoreRules.FILTER_TO_CALC, CoreRules.PROJECT_TO_CALC, CoreRules.CALC_MERGE));
hepProgramBuilder.addGroupEnd();
HepPlanner hepPlanner = new HepPlanner(hepProgramBuilder.build(), null, true, null, RelOptCostImpl.FACTORY);
hepPlanner.setRoot(logicalRelNode);
RelNode best = hepPlanner.findBestExp();
String planStr;
planStr = RelOptUtil.dumpPlan("origin", logicalRelNode, SqlExplainFormat.TEXT, SqlExplainLevel.EXPPLAN_ATTRIBUTES);
System.out.println(planStr);
planStr = RelOptUtil.dumpPlan("best", best, SqlExplainFormat.TEXT, SqlExplainLevel.EXPPLAN_ATTRIBUTES);
System.out.println(planStr);
}
}