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
SWT.NONE,
					schemaImage );
			if ( items != null && items.length > 0 )
			{
				availableDbObjectsTree.showItem( items[0] );
			}
		}
	}
	
	/*
	 * Sets the Root Element of the Available Data Sources
	 * This is usually the Name of the Catalog of the Database
	 */
	protected void setRootElement()
	{
		rootNode = new TreeItem(availableDbObjectsTree,SWT.NONE);
		rootNode.setImage(dataBaseImage);
		
		OdaDataSourceHandle dataSourceHandle = (OdaDataSourceHandle) ((OdaDataSetHandle) getContainer( ).getModel( )).getDataSource();
		
		rootNode.setText(dataSourceHandle.getName());
	}
	
	private void RemoveAllAvailableDbObjects()
	{
		availableDbObjectsTree.removeAll();
	}
	
	/**
	 *  Gets the list of schema objects