Custom CAPI service - default value of varchar2 parameter

I have a Custom CAPI Service function. That function has a varchar2 parameter (argument) and I wish to set a default value NULL for that parameter.
I set Default=null, and when I generate CAPI package, my function in that package looks like this (notice the quotation marks around null):
function cs_cjn_prod_cijena
( p_nacin_prodaje in varchar2 default 'null'
return number
is ...
And it should look like this:
function cs_cjn_prod_cijena
( p_nacin_prodaje in varchar2 default null
return number
is ...
I tried setting Default Value Type to Literal, Database Function Call, Client Function Call, but it's always the same thing.
If that parameter was number or date it would generate ok.
It seems like the bug in "Generate CAPI Definition" Headstart Utility.
I know that I can make my function's code to treat the string 'null' as a null default value, but I'd like to have a "real" null as a default value.
Does anybody have a solution for this?
Thanks!
Dalibor

Marcel,
Thank you for your answer, but it didn't help. I have already tried using Database Function Call. This time I tried deleting the CAPI package from repository before generating it again, like you suggested, but it didn't help.
I still get: p_nacin_prodaje in varchar2 default 'null'
Which version of Create CAPI Definition utility do you have?
My version is: HSU_CAPI, Revision: 6.5.2.0 ("Help/About This Utility" in Headstart Utilities application)
Thanks again,
Dalibor

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>
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> value should be "all". If "all" is selected, every data should be shown.
> It worked using the filter: row["status"] Equal to
> (params["NewParameter"].value == "all" ? row["status"] :
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>
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>
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Edited by: Efstratios Karaivazoglou on Dec 9, 2009 8:52 AM
Edited by: Efstratios Karaivazoglou on Dec 15, 2009 11:33 PM

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