src/org/apache/pig/backend/hadoop/executionengine/optimizer/SecondaryKeyOptimizer.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.pig.backend.hadoop.executionengine.optimizer;

import org.apache.pig.classification.InterfaceAudience;

@InterfaceAudience.Private
/**
 * Remove POSort and change PODistinct to use POSortedDistinct in nested foreach plan by sorting on a secondary key
 */
public interface SecondaryKeyOptimizer {

    int getNumSortRemoved();

    int getNumDistinctChanged();

    int getNumUseSecondaryKey();

}