/**
* 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
* <p/>
* http://www.apache.org/licenses/LICENSE-2.0
* <p/>
* 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.io;
/**
* Interface when implemented should return the estimated size of columnar projections
* that will be read from the split. This information will be used by split grouper for better
* grouping based on the actual data read instead of the complete split length.
*/
public interface ColumnarSplit {
/**
* Return the estimation size of the column projections that will be read from this split.
*
* @return - estimated column projection size that will be read in bytes
*/
long getColumnarProjectionSize();
}