/**
Copyright (C) SYSTAP, LLC DBA Blazegraph 2006-2016. All rights reserved.
Contact:
SYSTAP, LLC DBA Blazegraph
2501 Calvert ST NW #106
Washington, DC 20008
licenses@blazegraph.com
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 Aug 14, 2011
*/
package com.bigdata.bop.join;
import com.bigdata.bop.IPredicate;
import com.bigdata.relation.accesspath.IAccessPath;
/**
* Interface declares additional annotations for joins against an
* {@link IAccessPath} (versus a subquery or temporary solution set).
*
* @author <a href="mailto:thompsonbry@users.sourceforge.net">Bryan Thompson</a>
* @version $Id$
*/
public interface AccessPathJoinAnnotations extends JoinAnnotations {
/**
* The {@link IPredicate} which is used to generate the {@link IAccessPath}s
* during the join.
* <p>
* Note: Scale-out relies on this annotation when mapping intermediate
* results across the shards on a cluster so they can be joined on the nodes
* which have the data for the shards on which the {@link IAccessPath} must
* read.
*/
String PREDICATE = AccessPathJoinAnnotations.class.getName() + ".predicate";
}