[Exist-open] doubts with xquery and IF conditions

[Nicola B. <nic...@gm...>]

Hi,
I have some doubts with xquery.
"if" can only be used inside a for-cycle or inside return?

I'dto write an xql files with two targets:
1) show a list of results
2) delete some selected record

the target is set by a request parameter.


*******************************************************************
xquery version "1.0";
declare namespace transform = "http://exist-db.org/xquery/transform";
declare namespace request="http://exist-db.org/xquery/request";

let $mode := request:get-parameter("mode", "summary")

for $j in (
		...collect my nodes
	)

return
	 if ($mode = "summary") then  transform:transform($j,'style.xsl',())
	 else if ($mode = "delete") then ...
*******************************************************************

As you can see if condition is used at the end (return) but in this way
for-cycle is always executed, even if I don't need results.

I tried to use if like this:
+++++++++++++++++++++++++++++++++++
if ($mode = "summary") then
	[for-cycle]
else if ($mode = "delete") then [call function to delete]
+++++++++++++++++++++++++++++++++++

, but I got error.
Is there a way to do that?

Thanx,
nico