Bug 132805 Set descending to outer group will affect inner group.
Description: Set descending to outer group will affect inner group. Steps to reproduce: 1. New a sample datasource and dataset from orders. 2. Drag the dataset to Layout. 3. Add a group on ordernumber, interval 10, descending. 4. Add another group on orderdate, interval day 2, ascending. 5. Preview. Expected result: Data are grouped correctly. Actual result: Inner group didn't work unless you set outer group's sort to asc.
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/impl/QueryExecutor.java
if ( dataSource != null  )
		{
			
			if ( !dataSource.isOpen( )
					|| DataSetCacheManager.getInstance( ).doesLoadFromCache( ) == true )
			{
				
				
				
				dataSource.beforeOpen();
				
				
				odiDataSource = createOdiDataSource( ); 
				
				 
				
			    odiDataSource.setAppContext( queryAppContext );
				
				dataSource.openOdiDataSource( odiDataSource );
				
				dataSource.afterOpen();
			}
			else
			{
				
				odiDataSource = dataSource.getOdiDataSource();
				
				 
				
			    odiDataSource.setAppContext( queryAppContext );