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 Data Engine data type name of the column at the specified
		 * index.
		 * 
		 * @param index
		 *            The projected column index.
		 * @return The Data Engine data type name of the specified column.
		 * @throws BirtException
		 *             if given index is invalid.
		 */
		public String getColumnTypeName( int index ) throws BirtException
		{
			return null;
		}
		/**
		 * Returns the data provider specific data type name of the specified
		 * column.
		 * 
		 * @return the data type name as defined by the data provider.
		 * @throws BirtException
		 *             if given index is invalid.
		 */
		public String getColumnNativeTypeName( int index ) throws BirtException
		{
			return null;
		}
		/**
		 * Gets the label or display name of the column at the specified index.
		 *