/*
 * (c) Copyright 2010 Talis Information Ltd.
 * All rights reserved.
 * [See end of file]
 */

package algebra2;

import java.util.List ;

import com.hp.hpl.jena.sparql.core.Var ;

/**
 * All the operations peformed on tables.
 */
public interface AlgebraEngine
{
    // ?? List<Expr> for conditions
    // Table : guesstimates of stats.
    // ?? All joins take a condition.
    
    public Table mergeJoin(Table table1, Table table2) ;
    
    public Table indexJoin(Table table1, Table table2) ;

    public Table sort(Table table, List<Var> order) ;

    public Table innerLoopJoin(Table table1, Table table2) ;
    
    public Table semiJoin(Table table1, Table table2) ; 
    
    public Table antiJoin(Table table1, Table table2) ;
    
    /** SPARQL MINUS - antiJoin with modified join condition */ 
    public Table minus(Table table1, Table table2) ;

    public Table union(Table table1, Table table2) ; 
    public Table intersection(Table table1, Table table2) ;
    
    public Table diff(Table table1, Table table2) ; 
    public Table filter(Table table, Condition condition) ; 

    public Table leftJoin(Table table1, Table table2, Condition cond) ; 

}

/*
 * (c) Copyright 2010 Talis Information Ltd.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */