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
private		Scriptable		queryScope;
		
		
		private		Scriptable		parentScope;
		private 	boolean 		isPrepared = false;
		private 	boolean			isExecuted = false;
		private		Map				queryAppContext;
		
		protected	int				nestedLevel = 1;
		
		/**
		 * Create a new unopened odiDataSource given the data source runtime
		 * definition
		 * 
		 * @return
		 */
		abstract protected IDataSource createOdiDataSource( )
				throws DataException;
		/**
		 * Provide the actual DataSourceRuntime used for the query.
		 * 
		 * @return
		 */
		abstract protected DataSourceRuntime findDataSource( )
				throws DataException;
		/**
		 * Create a new instance of data set runtime
		 * 
		 * @return