Using cfif in a where clause

Hi all,

This question is sort of related to a previous post of mine about querying dates.  I'm trying to use a cfif statement in my where clause to determine if a field is empty or not.  Here's the code:

<cfquery name="GetPastEvents" datasource="DSN">

     SELECT *

     FROM SITE:Calendar

     WHERE DatePart('yyyy', [StartDate]) = <cfqueryparam value="#Dateformat(Today, 'yyyy')#" cfsqltype="CF_SQL_DATE" />

     and <cfif EndDate neq ''>StartDate<cfelse>EndDate</cfif>< <cfqueryparam value="#Today#" cfsqltype="CF_SQL_DATE" />

     and Archive = <cfqueryparam value="0" cfsqltype="CF_SQL_INTEGER" />

     ORDER BY StartDate ASC, StartTime ASC

</cfquery>

My issue that that CF tells me EndDate is not defined.  EndDate is a field in the table SITE:Calendar.  There has to be a way to make this work, no?  Thanks!