src/main/java/org/eigenbase/rex/RexVariable.java

/*
// Licensed to Julian Hyde under one or more contributor license
// agreements. See the NOTICE file distributed with this work for
// additional information regarding copyright ownership.
//
// Julian Hyde licenses this file to you 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 at:
//
// 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 org.eigenbase.rex;

import org.eigenbase.reltype.*;


/**
 * A row-expression which references a field.
 *
 * @author jhyde
 * @version $Id$
 * @since Nov 24, 2003
 */
public abstract class RexVariable
    extends RexNode
{
    //~ Instance fields --------------------------------------------------------

    protected final String name;
    protected final RelDataType type;

    //~ Constructors -----------------------------------------------------------

    protected RexVariable(
        String name,
        RelDataType type)
    {
        assert type != null;
        assert name != null;
        this.name = name;
        this.digest = name;
        this.type = type;
    }

    //~ Methods ----------------------------------------------------------------

    public RelDataType getType()
    {
        return type;
    }

    /**
     * Returns the name of this variable.
     */
    public String getName()
    {
        return name;
    }
}

// End RexVariable.java