Bug 136966 When set an alias on a column, the column can not be used in the cascading parameter
Description: When set an alias on a column, the column can not be used in the cascading parameter Steps to reproduce: 1. new a datasource and a dataset 2. set an alias on a column 3. new a cascading parameter, set the column with an alias as the values column Actual result: the column can not be used in the cascading parameter
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/dialogs/CascadingParametersDialog.java
private Text defaultValueEditor;
	private Text formatField;
	private Text listLimit;
	private Text promptText;
	private Combo dataSetsCombo;
	private Combo dataTypeChooser;
	private Combo displayTypeChooser;
	private Button createDSButton;
	private Button changeFormat;
	private Label previewLable;
	private Table table;
	private TableViewer valueTable;
	private CellEditor[] cellEditors;
	private static IChoiceSet dataType = DesignEngine.getMetaDataDictionary( )
			.getChoiceSet( DesignChoiceConstants.CHOICE_PARAM_TYPE );
	private CascadingParameterGroupHandle inputParameterGroup;
	private DataSetHandle dataSet;
	private ScalarParameterHandle selectedParameter;
	
	protected ScalarParameterHandle newParameter = null;
	private String defaultValue;
	private String formatPattern;
	private String formatCategroy;
	private boolean loading = true;
	private Button allowNull;
	/**
	 * 
	 * Constructor.
	 * 
	 * @param parentShell