Bug 177091 Can't access stored procedure defined in Oracle Package
1.setup an oracle connection 2.try to call a stored procedure defined in package
data/org.eclipse.birt.report.data.oda.jdbc.ui/src/org/eclipse/birt/report/data/oda/jdbc/ui/editors/SQLDataSetEditorPage.java
DragSource dragSource = new DragSource( availableDbObjectsTree,
				DND.DROP_COPY );
		dragSource.setTransfer( new Transfer[]{
			TextTransfer.getInstance( )
		} );
		dragSource.addDragListener( new DragSourceAdapter( ) {
			public void dragStart( DragSourceEvent event )
			{
				TreeItem[] selection = availableDbObjectsTree.getSelection( );
				
				selectionMac = availableDbObjectsTree.getSelection( );
				
				if ( selection.length > 0 )
				{
					if ( selection[0].getData( ) instanceof DbObject )
					{
						if ( !isAcceptableDbObjectType( getDbObjectType( selection[0].getData( ) ) ) )
						{
							event.doit = false;
							return;
						}
						else
						{
							if ( !isDbObjectTreeValid( selection,
									getDbObjectType( selection[0].getData( ) ) ) )
							{
								event.doit = false;
								return;
							}
						}