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/*
 * Copyright 2014 Gregory Graham.
 *
 * 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 nz.co.gregs.dbvolution.results;

/**
 *
 * Support DBvolution at
 * Patreon
 *
 * @author Gregory Graham
 */
public interface ExpressionCanHaveNullValues {

	/**
	 * Returns TRUE if this expression requires support for possible NULL database
	 * values.
	 *
	 * Support DBvolution at
	 * Patreon
	 *
	 * @return TRUE if the expression should check for NULLs, FALSE otherwise.
	 */
	public boolean getIncludesNull();

}