Bug 209450 [regression]Duplicate values display in Cascading parameter list[0705]
Descripption: Duplicate values display in Cascading parameter list Build number:2.3.0.v20071112 Steps to reproduce: 1. New sample data source and dataset from CUSTOMERS. 2. New a cascading parameter from COUNTRY, STATE AND CITY fields. 3. Preview. Expected result: Values in three parameter list aren't duplicated. Actual result: Duplicate values show in parameter list. Error log:n/a
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/api/impl/ParameterHelper.java
{
	private static final String VALUE_PREFIX = "__VALUE__";
	private static final String LABEL_PREFIX = "__LABEL__";
	private ScalarParameterHandle parameter;
	private boolean distinct;
	private Comparator comparator;
	private String labelColumnName;
	private String valueColumnName;
	private String valueType;
	private static class FixInOrderComparator implements Comparator