Finding images not referenced in a DB table - coldfusion

Question

I get a query of all the files (images) in a directory
<cfset local.teamBase = "#GetDirectoryFromPath(GetBaseTemplatePath())#teamlogo\">
<cfdirectory action="LIST" directory="#local.teamBase#" name="rc.qryTeamLogo">
I later loop over all these filenames, skipping those that are in use
<select name="Logo" <cfif deleted>disabled="disabled"</cfif>>
<option></option>
<cfloop query="rc.qryTeamLogo">
<cfif name EQ mylogo>
<option value="#name#" selected>#name#</option>
<cfelseif request.objTeam.isUsed(name) EQ 1 OR name EQ "thumbs.db">
<!--- Do not show --->
<cfelse>
<option value="#name#">#name#</option>
</cfif>
</cfloop>
</select>
The isUsed() function looks like
<cffunction name="isUsed" returntype="boolean" output="false">
<cfargument name="logo" required="true" type="string">
<cfquery name="qryUsed" datasource="#application.DSN#">
SELECT logo
FROM CCF.team
WHERE logo = <cfqueryparam cfsqltype="CF_SQL_VARCHAR" value="#arguments.logo#">
AND Deleted = 0
</cfquery>
<cfif qryUsed.recordcount EQ 0>
<cfreturn false>
</cfif>
<cfreturn true>
</cffunction>
The problem with this is as more and more files get added, this gets slower and slower.
What I would really like a single query that can assemble the whole thing

Answer 1

You can run one query before your select box
<cfquery name="qryLogos" datasource="#application.DSN#">
SELECT logo
FROM CCF.team
WHERE logo IN (<cfqueryparam cfsqltype="CF_SQL_VARCHAR" value="#valueList(rc.qryTeamLogo.name)#" list="true">)
AND Deleted = 0
</cfquery>
Then set all those logo's into an array and add thumbs.db too, so you have one less check to do.
<cfset allLogs = listToArray(valueList(qryLogos.logo))>
<cfset arrayAppend(allLogs,'thumbs.db')>
and then change your elseif to this
<cfelseif arrayFind(allLogs,name)>
<!--- don't display --->

Answer 2

Load the file information into XML. Shread the XML into a table and JOIN on that.
<cfset local.teamBase = "#GetDirectoryFromPath(GetBaseTemplatePath())#teamlogo\">
<cfset local.qryTeamLogo = DirectoryList(local.teamBase, false, "query")>
<cfsavecontent variable="local.xmlTeamLogo">
<ul class="xoxo">
<cfoutput query="local.qryTeamLogo">
<li><code>#xmlformat(name)#</code></li>
</cfoutput>
</ul>
</cfsavecontent>
<cfquery name="local.qryResult">
DECLARE #xmlTeamLogo xml = <cfqueryparam cfsqltype="CF_SQL_varchar" value="#local.xmlTeamLogo#">
SELECT Value AS Name
FROM dbo.udfXOXORead(#xmlTeamLogo)
WHERE NOT Value IN (
SELECT Logo
FROM CCF.Team WITH (NOLOCK)
WHERE Deleted = 0
)
</cfquery>
The Table Valued Function
create function [dbo].[udfXOXORead](#xmlData xml)
returns #tblmessage TABLE (
[value] nvarchar(max) NULL
)
as
begin
INSERT INTO #tblMessage
SELECT Tbl.Col.value('(code)[1]', 'nvarchar(max)') AS [value]
FROM #xmlData.nodes('/ul/li') Tbl(Col)
RETURN
end