Bug 200286 [Regression] Data set editor size is not correct [07]
data/org.eclipse.birt.report.data.oda.jdbc.ui/src/org/eclipse/birt/report/data/oda/jdbc/ui/editors/SQLDataSetEditorPage.java
SQLUtility.getTailoredSearchText( null ) );
						TreeItem[] items = item.getItems( );
						if ( items != null )
						{
							for ( int i = 0; i < items.length; i++ )
							{
								items[i].dispose( );
							}
						}
						Utility.createTreeItems( item,
								columnList,
								SWT.NONE,
								columnImage );
					}
				}
			}
		} );
	}
	/**
	 * Adds drag support to tree..Must set tree before execution.
	 */
	public void addDragSupportToTree( )
	{
		DragSource dragSource = new DragSource( availableDbObjectsTree,
				DND.DROP_COPY );
		dragSource.setTransfer( new Transfer[]{
			TextTransfer.getInstance( )
		} );
		dragSource.addDragListener( new DragSourceAdapter( ) {
			public void dragStart( DragSourceEvent event )