Bug 123915 Add table-fetch limitation when DataSet Editor is populating table names.
When fetch table names from database of large volume of data, there lies a possibility that the editor window will be frozen because of the population of huge number of table names. This should be enhanced. A handy solution might be limiting the number of table names being fetched each schema.
data/org.eclipse.birt.report.data.oda.jdbc.ui/src/org/eclipse/birt/report/data/oda/jdbc/ui/editors/SQLDataSetEditorPage.java
public void mouseDoubleClick(MouseEvent e) 
			{
				
			}
		});
		availableDbObjectsTree.addSelectionListener(new SelectionAdapter() {
			public void widgetSelected(SelectionEvent event) {
			  if ( event.widget.getClass() != null )
				 handleAvailabeTreeSelection();
			}
			private void handleAvailabeTreeSelection() {
				TreeItem items[] = availableDbObjectsTree.getSelection();	
				for ( int i = 0; i <items.length; i++ )
				{
					if ( items[i].getGrayed() )
					{
						availableDbObjectsTree.setRedraw(false);
						availableDbObjectsTree.deselectAll();
						availableDbObjectsTree.setRedraw(true);	
						availableDbObjectsTree.redraw();	
					}
				}
			}
		  });
		
		
		Group selectTableGroup = new Group(tablescomposite, SWT.FILL);
		{
			GridLayout groupLayout = new GridLayout();
			groupLayout.numColumns = 3;