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
CachedMetaDataHandle cmdh = null;
		try
		{
			cmdh = DataSetUIUtil.getCachedMetaDataHandle( dataSet );
		}
		catch ( SemanticException e )
		{
		}
		if ( cmdh != null )
		{
			for ( Iterator iter = cmdh.getResultSet( ).iterator( ); iter.hasNext( ); )
			{
				ResultSetColumnHandle element = (ResultSetColumnHandle) iter.next( );
				if ( DEUtil.getColumnExpression( element.getColumnName( ) )
						.equalsIgnoreCase( value ) )
				{
					return element.getColumnName( );
				}
			}
		}
		return null;
	}
	private void updateButtons( )
	{
		boolean okEnable = true;
		if ( dataSet == null )
		{