org.sql.generation.api.grammar.booleans.UniquePredicate Maven / Gradle / Ivy

/*
 * Copyright (c) 2010, Stanislav Muhametsin. All Rights Reserved.
 *
 * 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 org.sql.generation.api.grammar.booleans;

import org.sql.generation.api.grammar.query.QueryExpression;

/**
 * The interface for syntax element representing the test for uniqueness ({@code UNIQUE} sub-query).
 * 
 * @author Stanislav Muhametsin
 */
public interface UniquePredicate
    extends UnaryPredicate
{

    /**
     * Gets the query on which {@code UNIQUE} operates on.
     */
    public QueryExpression getValueExpression();
}