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
groupKey = groupKeyInfo.getColumnName();
			isComplexExpression = true;
		}
		
		IQuery.GroupSpec dest = new IQuery.GroupSpec( groupIndex, groupKey );
		dest.setName( src.getName() );
		dest.setInterval( src.getInterval());
		dest.setIntervalRange( src.getIntervalRange());
		dest.setIntervalStart( src.getIntervalStart());
		dest.setSortDirection( src.getSortDirection());
		dest.setFilters( src.getFilters());
		dest.setSorts( src.getSorts() );
		dest.setIsComplexExpression( isComplexExpression );
		return dest;
	}
	
	/**
	 * Executes a subquery
	 * 
	 * @param iterator
	 * @param subQueryName
	 * @param subScope
	 * @return
	 * @throws DataException
	 */
	QueryResults execSubquery( IResultIterator iterator, String subQueryName,
			Scriptable subScope ) throws DataException
	{
		assert subQueryName != null;
		PreparedSubquery subquery = (PreparedSubquery) subQueryMap.get( subQueryName );