org.apache.hadoop.hive.ql.io.ColumnarSplit Maven / Gradle / Ivy
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* Licensed to the Apache Software Foundation (ASF) under one
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* to you under the Apache License, Version 2.0 (the
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*
* http://www.apache.org/licenses/LICENSE-2.0
*
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*/
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();
}