/*
 * Copyright 2009-2010 by The Regents of the University of California
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * you may obtain a copy of the License from
 * 
 *     http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package edu.uci.ics.hyracks.algebricks.core.algebra.expressions;

import java.util.Collection;
import java.util.Map;

import edu.uci.ics.hyracks.algebricks.core.algebra.base.EquivalenceClass;
import edu.uci.ics.hyracks.algebricks.core.algebra.base.ILogicalExpression;
import edu.uci.ics.hyracks.algebricks.core.algebra.base.LogicalVariable;
import edu.uci.ics.hyracks.algebricks.core.algebra.properties.FunctionalDependency;

public abstract class AbstractLogicalExpression implements ILogicalExpression {

    @Override
    public void getConstraintsAndEquivClasses(Collection<FunctionalDependency> fds,
            Map<LogicalVariable, EquivalenceClass> equivClasses) {
        // do nothing
    }

    @Override
    public void getConstraintsForOuterJoin(Collection<FunctionalDependency> fds,
            Collection<LogicalVariable> innerSideVars) {
        // do nothing
    }

}