/**
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 Nov 16, 2011
*/
package com.bigdata.bop.join;
/**
* An exception thrown when a hash join does not have any join variables and is
* considering the cross product of two many solutions as a result.
* <p>
* This exception normally indicates a problem with the query plan since a hash
* join without any join variables will consider the full M x N cross product of
* the solutions. If that cross product is too large, then the join can become
* CPU bound and the query will make only very slow progress.
*
* @see HashJoinAnnotations#NO_JOIN_VARS_LIMIT
*
* @author <a href="mailto:thompsonbry@users.sourceforge.net">Bryan Thompson</a>
* @version $Id$
*/
public class UnconstrainedJoinException extends RuntimeException {
/**
*
*/
private static final long serialVersionUID = 1L;
/**
*
*/
public UnconstrainedJoinException() {
}
/**
* @param message
*/
public UnconstrainedJoinException(String message) {
super(message);
}
/**
* @param cause
*/
public UnconstrainedJoinException(Throwable cause) {
super(cause);
}
/**
* @param message
* @param cause
*/
public UnconstrainedJoinException(String message, Throwable cause) {
super(message, cause);
}
}