Bug 201013 [Automation][Regression]Invalid group key column name: _{$TEMP_GROUP_1$} occurs when preview attached report[1102]
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/impl/QueryExecutor.java
{
			dataSet.close( );
		}
		catch ( DataException e )
		{
			logger.logp( Level.FINE,
					QueryExecutor.class.getName( ),
					"close",
					e.getMessage( ),
					e );
		}
		odiQuery = null;
		odiDataSource = null;
		odiResult = null;
		queryScope = null;
		isPrepared = false;
		isExecuted = false;
		
		
		try
		{
			dataSet.afterClose( );
		}
		catch ( DataException e )
		{
			logger.logp( Level.FINE,
					QueryExecutor.class.getName( ),
					"close",
					e.getMessage( ),
					e );