Bug 128359 The logic is not correctly when a filter is added to the table on the layout
Description: The logic is not correctly when a filter is added to the table on the layout Steps to reproduce: Let me give an example. 1. Creat a report, new a datasource and a dataset 2. We consume that the dataset has 10 records(DataResult_A) . We set a filter(Filter_A) in the dataset, and then the 6 records of the dataset(DataResult_B) are gained. 3. Drag the dataset to the layout, and set another filter(Filter_B) on the table. Actual result: The result of Filter_B is based on DataResult_A. Expect result: The result of Filter_B should be based on DataResult_B.
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/impl/PreparedQuery.java
{
				logger.logp( Level.FINE,
							PreparedQuery.Executor.class.getName( ),
							"close",
							e.getMessage( ),
							e );
			}
		    dataSet = null;
			dataSource = null;
		    
			logger.logp( Level.FINER,
					PreparedQuery.Executor.class.getName( ),
					"close",
					"executor closed " );
		}
		
		/**
		 * Open the required DataSource. This method should be called after
		 * "dataSource" is initialized by findDataSource() method.
		 * 
		 * @throws DataException
		 */
		protected void openDataSource( ) throws DataException
		{
			assert odiDataSource == null;
			
			
		    
			if ( dataSource != null  )
			{