NoOpVariableResolver.java

/*
 * 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 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 com.facebook.presto.sql.planner;

import com.facebook.presto.spi.relation.VariableReferenceExpression;

import static com.facebook.presto.sql.analyzer.ExpressionTreeUtils.createSymbolReference;

public class NoOpVariableResolver
        implements VariableResolver
{
    public static final NoOpVariableResolver INSTANCE = new NoOpVariableResolver();

    @Override
    public Object getValue(VariableReferenceExpression variable)
    {
        return createSymbolReference(variable);
    }
}