org.apache.hadoop.hive.ql.optimizer.calcite.cost.HiveRelMdCost Maven / Gradle / Ivy
/**
* 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.hadoop.hive.ql.optimizer.calcite.cost;
import org.apache.calcite.plan.RelOptCost;
import org.apache.calcite.rel.RelNode;
import org.apache.calcite.rel.metadata.ChainedRelMetadataProvider;
import org.apache.calcite.rel.metadata.ReflectiveRelMetadataProvider;
import org.apache.calcite.rel.metadata.RelMdPercentageOriginalRows;
import org.apache.calcite.rel.metadata.RelMetadataProvider;
import org.apache.calcite.util.BuiltInMethod;
import org.apache.hadoop.hive.ql.optimizer.calcite.reloperators.HiveAggregate;
import org.apache.hadoop.hive.ql.optimizer.calcite.reloperators.HiveJoin;
import org.apache.hadoop.hive.ql.optimizer.calcite.reloperators.HiveTableScan;
import com.google.common.collect.ImmutableList;
/**
* HiveRelMdCost supplies the implementation of cost model.
*/
public class HiveRelMdCost {
private final HiveCostModel hiveCostModel;
public HiveRelMdCost(HiveCostModel hiveCostModel) {
this.hiveCostModel = hiveCostModel;
}
public RelMetadataProvider getMetadataProvider() {
return ChainedRelMetadataProvider.of(
ImmutableList.of(
ReflectiveRelMetadataProvider.reflectiveSource(this,
BuiltInMethod.NON_CUMULATIVE_COST.method),
RelMdPercentageOriginalRows.SOURCE));
}
public RelOptCost getNonCumulativeCost(HiveAggregate aggregate) {
return hiveCostModel.getAggregateCost(aggregate);
}
public RelOptCost getNonCumulativeCost(HiveJoin join) {
return hiveCostModel.getJoinCost(join);
}
public RelOptCost getNonCumulativeCost(HiveTableScan ts) {
return hiveCostModel.getScanCost(ts);
}
// Default case
public RelOptCost getNonCumulativeCost(RelNode rel) {
return hiveCostModel.getDefaultCost();
}
}
// End HiveRelMdCost.java