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/**

Copyright (C) SYSTAP, LLC DBA Blazegraph 2006-2016.  All rights reserved.

Contact:
     SYSTAP, LLC DBA Blazegraph
     2501 Calvert ST NW #106
     Washington, DC 20008
     [email protected]

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/
/*
 * Created on Jul 19, 2010
 */
package com.bigdata.bop.solutions;

import com.bigdata.bop.join.HashJoinAnnotations;

/**
 * Annotations for DISTINCT operators.
 * 
 * @author [email protected]
 */
public interface DistinctAnnotations {

	/**
	 * The variables on which the distinct constraint will be imposed.
	 * Binding sets with distinct values for the specified variables will be
	 * passed on.
	 */
	String VARIABLES = HashJoinAnnotations.JOIN_VARS;

}