Bug 152430 Key can modify to empty string
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/ResultSetColumnHandle.java
/*******************************************************************************
 * Copyright (c) 2004 Actuate Corporation.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *  Actuate Corporation  - initial API and implementation
 *******************************************************************************/
package org.eclipse.birt.report.model.api;
import org.eclipse.birt.report.model.api.activity.SemanticException;
import org.eclipse.birt.report.model.api.elements.structures.ResultSetColumn;
/**
 * Represents the handle of one column in the result set. The result set column
 * defines the data in which column is in the result set.
 * <dl>
 * <dt><strong>Name </strong></dt>
 * <dd>a result set column has an optional name.</dd>
 * 
 * <dt><strong>Position </strong></dt>
 * <dd>a result set column has an optional position for it.</dd>
 * 
 * <dt><strong>Data Type </strong></dt>
 * <dd>a result set column has a choice data type: any, integer, string, data
 * time, decimal, float, structure or table.</dd>
 * </dl>
 * 
 */
public class ResultSetColumnHandle extends StructureHandle