Bug 212478 Exception occurs when preview the table including a Autotext
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/data/dte/ReportQueryBuilder.java
*/
		private void transformExpressions( ReportItemDesign item,
				IBaseQueryDefinition query, String groupName )
				throws BirtException
		{
			if ( query != null )
			{
				ITotalExprBindings totalExpressionBindings = getNewExpressionBindings(
						item, query, groupName );
				addNewColumnBindings( query, totalExpressionBindings );
				replaceOldExpressions( item, totalExpressionBindings );
			}
		}
		/**
		 * Transfer the old expression to column dataBinding and bind it to the
		 * Query. And create a news expression to replace the old expression.
		 * 
		 * @param expr
		 *            expression to be transfered. return the transfered
		 *            expression
		 */
		protected String transformExpression( String expr,
				IBaseQueryDefinition query, String groupName )
				throws BirtException
		{
			if ( expr == null )
			{
				return null;
			}
			if ( query != null )