Bug 209456 No null value in value list from Select value...[07]
Description: No null value in value list from Select value... Build number:2.3.0.v20071112 Steps to reproduce: 1. New sample data source and dataset from CUSTOMERS. 2. Insert dataset to Layout, add a filter on column STATE, click <Select value...>, check value list. 3. New a report parameter, dynamic, tick off isRequired,value column is STATE, want to set default value as Null Value through <Select value...> Expected result: The column contains null value so it should be able to be selected in value list. Actual result: No null value for selection. Error log:n/a
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/data/ui/util/SelectValueFetcher.java
{
	private final static String BINDING_GROUP_NAME = "GROUP";
	private final static String BINDING_ROW_NAME = "FILTER_SELECT_VALUE";
	private final static String BINDING_GROUP_EXPRESSION = "row.FILTER_SELECT_VALUE";
	/**
	 * private constructor
	 */
	private SelectValueFetcher( )
	{
	}
	
	public static List getSelectValueList( String expression,
			DataSetHandle dataSetHandle, boolean inclFilter ) throws BirtException
	{
		if ( !ExpressionUtility.isColumnExpression( expression, true )
				&& !ExpressionUtility.isColumnExpression( expression, false ) )
		{
			throw new DataException( Messages.getString( "SelectValueDialog.messages.info.invalidSelectVauleExpression" ) );
		}
		List selectValueList = new ArrayList( );
		if ( expression != null && expression.trim( ).length( ) > 0 )
		{