exec/java-exec/src/main/java/org/apache/drill/exec/planner/cost/DrillDefaultRelMetadataProvider.java

/*
 * 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.cost;

import com.google.common.collect.ImmutableList;
import org.apache.calcite.rel.metadata.ChainedRelMetadataProvider;
import org.apache.calcite.rel.metadata.DefaultRelMetadataProvider;
import org.apache.calcite.rel.metadata.RelMetadataProvider;

public class DrillDefaultRelMetadataProvider {
  private DrillDefaultRelMetadataProvider() {
  }

  public static final RelMetadataProvider INSTANCE = ChainedRelMetadataProvider.of(ImmutableList
      .of(DrillRelMdRowCount.SOURCE,
          DrillRelMdDistinctRowCount.SOURCE,
          DrillRelMdSelectivity.SOURCE,
          DrillRelMdMaxRowCount.SOURCE,
          DrillRelMdPredicates.SOURCE,
          DefaultRelMetadataProvider.INSTANCE));
}