Bug 134988 [regression]Available items in Query didn't change when change data source in Edit Data Set Dialog.
Description: Available items in Query didn't change when change data source in Edit Data Set Dialog. Steps to reproduce: 1. New two different data sources. 2. New a dataset, change data source, view Available Items in Query pane. Expected result: Available Items in Query pane changed according to new Data source. Actual result: Available Items in Query pane kept unchanged.
data/org.eclipse.birt.report.data.oda.jdbc.ui/src/org/eclipse/birt/report/data/oda/jdbc/ui/editors/SQLDataSetEditorPage.java
addDragSupportToTree();   
	}
	
	/**
	 * 
	 * @param group
	 */
	private void setupIdentifierQuoteStringCheckBox(Group group )
	{
		GridData layoutData = new GridData( GridData.FILL_HORIZONTAL );
		layoutData.horizontalSpan = 3;
		identifierQuoteStringCheckBox = new Button( group, SWT.CHECK );
		identifierQuoteStringCheckBox.setText( JdbcPlugin.getResourceString( "tablepage.button.dnd" ) ); 
		identifierQuoteStringCheckBox.setSelection( false );
		identifierQuoteStringCheckBox.setLayoutData( layoutData );
	}
	
	/**
	 * 
	 * @param b
	 */
	private void enableSchemaComponent( boolean b )
	{
		if ( b )
		{
			this.schemaCombo.setEnabled( true );
			this.schemaLabel.setEnabled( true );
		}
		else