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 static final String LABEL_GROUP_MORE_OPTIONS = Messages.getString( "CascadingParametersDialog.label.group.moreOptions" ); 
	private static final String LABEL_HELP_TEXT = Messages.getString( "CascadingParametersDialog.label.helpText" ); 
	private static final String LABEL_FORMAT_AS = Messages.getString( "CascadingParametersDialog.label.formatAs" ); 
	private static final String LABEL_CHANGE_FORMAT_BUTTON = Messages.getString( "CascadingParametersDialog.label.button.changeFormat" ); 
	private static final String LABEL_PREVIEW_WITH_FORMAT = Messages.getString( "CascadingParametersDialog.label.preview" ); 
	private static final String LABEL_CREATE_NEW_PARAMETER = Messages.getString( "CascadingParametersDialog.label.createNewParam" ); 
	private static final String LABEL_SELECT_A_VALUE_COLUMN = Messages.getString( "CascadingParametersDialog.label.selecteValueColumn" ); 
	private static final String LABEL_NO_COLUMN_AVAILABLE = Messages.getString( "CascadingParametersDialog.Label.NoColumnAvailable" ); 
	private static final String BUTTON_ALLOW_NULL_VALUE = Messages.getString( "CascadingParametersDialog.Button.AllowNull" ); 
	private static final String COLUMN_NAME = "Name"; 
	private static final String COLUMN_VALUE = "Value"; 
	private static final String COLUMN_DISPLAY_TEXT = "Display Text"; 
	private static final String COLUMN_NAME_LABEL = Messages.getString( "CascadingParametersDialog.label.column.name" ); 
	private static final String COLUMN_VALUE_LABEL = Messages.getString( "CascadingParametersDialog.label.column.value" ); 
	private static final String COLUMN_DISPLAY_TEXT_LABEL = Messages.getString( "CascadingParametersDialog.label.column.displayText" ); 
	private static final String PARAM_CONTROL_LIST = DesignChoiceConstants.PARAM_CONTROL_LIST_BOX
			+ "/List"; 
	private static final String PARAM_CONTROL_COMBO = DesignChoiceConstants.PARAM_CONTROL_LIST_BOX
			+ "/Combo"; 
	private static final String DISPLAY_NAME_CONTROL_LIST = Messages.getString( "CascadingParametersDialog.display.controlType.listBox" ); 
	private static final String DISPLAY_NAME_CONTROL_COMBO = Messages.getString( "CascadingParametersDialog.display.controlType.comboBox" ); 
	private static final double DEFAULT_PREVIEW_NUMBER = Double.parseDouble( "1234.56" ); 
	private static final String DEFAULT_PREVIEW_STRING = Messages.getString( "CascadingParametersDialog.default.preview.string" ); 
	private static final String ERROR_TITLE_INVALID_LIST_LIMIT = Messages.getString( "ParameterDialog.ErrorTitle.InvalidListLimit" ); 
	private static final String ERROR_MSG_INVALID_LIST_LIMIT = Messages.getString( "ParameterDialog.ErrorMessage.InvalidListLimit" ); 
	private Group optionsGroup;
	private Group propertiesGroup;
	private Text cascadingNameEditor;
	private Text paramNameEditor;
	private Text helpTextEditor;