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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.drill.exec.planner.logical;
import org.apache.calcite.plan.Contexts;
import org.apache.calcite.plan.RelOptCluster;
import org.apache.calcite.rel.RelNode;
import org.apache.calcite.rel.core.AggregateCall;
import org.apache.calcite.rel.core.CorrelationId;
import org.apache.calcite.rel.core.JoinInfo;
import org.apache.calcite.rel.core.JoinRelType;
import org.apache.calcite.rel.core.RelFactories;
import org.apache.calcite.rel.type.RelDataType;
import org.apache.calcite.rex.RexNode;
import org.apache.calcite.rex.RexUtil;
import org.apache.calcite.tools.RelBuilderFactory;
import org.apache.calcite.util.ImmutableBitSet;
import org.apache.drill.exec.planner.DrillRelBuilder;
import java.util.List;
import java.util.Set;
import static org.apache.calcite.rel.core.RelFactories.DEFAULT_AGGREGATE_FACTORY;
import static org.apache.calcite.rel.core.RelFactories.DEFAULT_FILTER_FACTORY;
import static org.apache.calcite.rel.core.RelFactories.DEFAULT_JOIN_FACTORY;
import static org.apache.calcite.rel.core.RelFactories.DEFAULT_MATCH_FACTORY;
import static org.apache.calcite.rel.core.RelFactories.DEFAULT_PROJECT_FACTORY;
import static org.apache.calcite.rel.core.RelFactories.DEFAULT_SET_OP_FACTORY;
import static org.apache.calcite.rel.core.RelFactories.DEFAULT_SORT_FACTORY;
import static org.apache.calcite.rel.core.RelFactories.DEFAULT_TABLE_SCAN_FACTORY;
import static org.apache.calcite.rel.core.RelFactories.DEFAULT_VALUES_FACTORY;
import static org.apache.drill.exec.planner.logical.DrillRel.DRILL_LOGICAL;
/**
* Contains factory implementation for creating various Drill Logical Rel nodes.
*/
public class DrillRelFactories {
private static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(DrillRelFactories.class);
public static final RelFactories.ProjectFactory DRILL_LOGICAL_PROJECT_FACTORY =
new DrillProjectFactoryImpl();
public static final RelFactories.FilterFactory DRILL_LOGICAL_FILTER_FACTORY =
new DrillFilterFactoryImpl();
public static final RelFactories.JoinFactory DRILL_LOGICAL_JOIN_FACTORY = new DrillJoinFactoryImpl();
public static final RelFactories.AggregateFactory DRILL_LOGICAL_AGGREGATE_FACTORY = new DrillAggregateFactoryImpl();
public static final RelFactories.SemiJoinFactory DRILL_SEMI_JOIN_FACTORY = new SemiJoinFactoryImpl();
private static class SemiJoinFactoryImpl implements RelFactories.SemiJoinFactory {
public RelNode createSemiJoin(RelNode left, RelNode right,
RexNode condition) {
final JoinInfo joinInfo = JoinInfo.of(left, right, condition);
return DrillSemiJoinRel.create(left, right,
condition, joinInfo.leftKeys, joinInfo.rightKeys);
}
}
/**
* A {@link RelBuilderFactory} that creates a {@link DrillRelBuilder} that will
* create logical relational expressions for everything.
*/
public static final RelBuilderFactory LOGICAL_BUILDER =
DrillRelBuilder.proto(
Contexts.of(DEFAULT_PROJECT_FACTORY,
DEFAULT_FILTER_FACTORY,
DEFAULT_JOIN_FACTORY,
DRILL_SEMI_JOIN_FACTORY,
DEFAULT_SORT_FACTORY,
DEFAULT_AGGREGATE_FACTORY,
DEFAULT_MATCH_FACTORY,
DEFAULT_SET_OP_FACTORY,
DEFAULT_VALUES_FACTORY,
DEFAULT_TABLE_SCAN_FACTORY));
/**
* Implementation of {@link RelFactories.ProjectFactory} that returns a vanilla
* {@link DrillProjectRel}.
*/
private static class DrillProjectFactoryImpl implements RelFactories.ProjectFactory {
@Override
public RelNode createProject(RelNode child,
List<? extends RexNode> childExprs, List<String> fieldNames) {
final RelOptCluster cluster = child.getCluster();
final RelDataType rowType =
RexUtil.createStructType(cluster.getTypeFactory(), childExprs, fieldNames, null);
return DrillProjectRel.create(cluster, child.getTraitSet().plus(DRILL_LOGICAL), child, childExprs, rowType);
}
}
/**
* Implementation of {@link RelFactories.FilterFactory} that
* returns a vanilla {@link DrillFilterRel}.
*/
private static class DrillFilterFactoryImpl implements RelFactories.FilterFactory {
@Override
public RelNode createFilter(RelNode child, RexNode condition) {
return DrillFilterRel.create(child, condition);
}
}
/**
* Implementation of {@link RelFactories.JoinFactory} that returns a vanilla
* {@link DrillJoinRel}.
*/
private static class DrillJoinFactoryImpl implements RelFactories.JoinFactory {
@Override
public RelNode createJoin(RelNode left, RelNode right,
RexNode condition, Set<CorrelationId> variablesSet,
JoinRelType joinType, boolean semiJoinDone) {
return new DrillJoinRel(left.getCluster(), left.getTraitSet().plus(DRILL_LOGICAL), left, right, condition, joinType);
}
@Override
public RelNode createJoin(RelNode left, RelNode right,
RexNode condition, JoinRelType joinType,
Set<String> variablesStopped, boolean semiJoinDone) {
return new DrillJoinRel(left.getCluster(), left.getTraitSet().plus(DRILL_LOGICAL), left, right, condition, joinType);
}
}
/**
* Implementation of {@link RelFactories.AggregateFactory} that returns a vanilla
* {@link DrillAggregateRel}.
*/
private static class DrillAggregateFactoryImpl implements RelFactories.AggregateFactory {
@Override
public RelNode createAggregate(RelNode input, boolean indicator, ImmutableBitSet groupSet,
com.google.common.collect.ImmutableList<ImmutableBitSet> groupSets, List<AggregateCall> aggCalls) {
return new DrillAggregateRel(input.getCluster(), input.getTraitSet().plus(DRILL_LOGICAL), input, indicator, groupSet, groupSets, aggCalls);
}
}
}
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