Bug 190769 [Regression]The attached report pop up exception when preview
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/data/dte/QueryResultSet.java
{
		/**
		 * Returns the number of columns in a detail row of the result set.
		 * 
		 * @return the number of columns in a detail row.
		 */
		public int getColumnCount( )
		{
			return 0;
		}
		/**
		 * Returns the column name at the specified index.
		 * 
		 * @param index
		 *            The projected column index.
		 * @return The name of the specified column.
		 * @throws BirtException
		 *             if given index is invalid.
		 */
		public String getColumnName( int index ) throws BirtException
		{