Bug 196745 Data Engine implementation of BPS80- Result Set Sharing
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/impl/ResultIterator.java
* @throws DataException
		 */
		void doSaveExpr( Map valueMap ) throws DataException
		{
			doSave( valueMap, false );
		}
		/**
		 * @throws DataException
		 */
		void doSaveFinish( ) throws DataException
		{
			doSave( null, true );
		}
		/**
		 * @throws DataException
		 */
		void doSaveStart( ) throws DataException
		{
			if ( needsSaveToDoc( ) == false )
				return;
			this.getRdSave( ).saveStart( );
		}
		
		/**
		 * @throws DataException
		 * 
		 */
		private void doSave( Map valueMap, boolean finish )
				throws DataException
		{