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
manager.add( separator );
		separator = new Separator( "copy" );
		manager.add( separator );
		separator = new Separator( "select" );
		manager.add( separator );
		manager.appendToGroup( "undo", getAction( "undo", viewer, JdbcPlugin.getResourceString( "sqleditor.action.undo" ), ITextOperationTarget.UNDO ) );
		manager.appendToGroup( "undo", getAction( "redo", viewer, JdbcPlugin.getResourceString( "sqleditor.action.redo" ), ITextOperationTarget.REDO ) );
		manager.appendToGroup( "copy", getAction( "cut", viewer, JdbcPlugin.getResourceString( "sqleditor.action.cut" ), ITextOperationTarget.CUT ) );
		manager.appendToGroup( "copy", getAction( "copy", viewer, JdbcPlugin.getResourceString( "sqleditor.action.copy" ), ITextOperationTarget.COPY ) );
		manager.appendToGroup( "copy", getAction( "paste", viewer, JdbcPlugin.getResourceString( "sqleditor.action.paste" ), ITextOperationTarget.PASTE ) );
		manager.appendToGroup( "select", getAction( "selectall", viewer, JdbcPlugin.getResourceString( "sqleditor.action.selectAll" ), ITextOperationTarget.SELECT_ALL ) );
		Menu menu = manager.createContextMenu( widget );
		manager.addMenuListener( new IMenuListener( ) {
			public void menuAboutToShow( IMenuManager manager )
			{
				Enumeration elements = htActions.elements( );
				while ( elements.hasMoreElements( ) )
				{
					SQLEditorAction action = (SQLEditorAction) elements.nextElement( );
					action.update( );
				}
			}
		} );
		widget.setMenu( menu );
	}
	private final SQLEditorAction getAction( String id, SourceViewer viewer,
			String name, int operation )
	{
		SQLEditorAction action = (SQLEditorAction) htActions.get( id );
		if ( action == null )