ridscan.java

用java语言简单实现数据库的初步功能

package simpledb.index.query;

import simpledb.record.RID;
import simpledb.query.Scan;

/** 
 * A rid-scan is a scan which has an index
 * as one of its leaves.
 * @author Edward Sciore
 *
 */
public interface RidScan extends Scan {
	
	/**
	 * Returns the dataRid value obtained from the current
	 * index record in the scan.
	 * @return the current dataRid value.
	 */
	public RID getDataRid();
}