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
"PreparedQuery starts up." );
	    assert engine != null && queryDefn != null;
		this.engine = engine;
		this.queryDefn = queryDefn;
		this.aggrTable = new AggregateTable(this);
		
		logger.fine( "Start to prepare a PreparedQuery." );
		prepare();
		logger.fine( "Finished preparing the PreparedQuery." );
	}
	
	/**
	 * @return the IBaseQueryDefn instance which defines this query
	 */	
	protected IBaseQueryDefinition getQueryDefn( )
	{
		return queryDefn;
	}
	
	/**
	 * @return the registry of all aggregate expression
	 */
	AggregateTable getAggrTable()
	{
		return aggrTable;
	}
	/**
	 * @return appContext
	 */
	protected Map getAppContext()