Need to call DB func on create in ADF BC

Hi OTN,
I have a taskflow for creating new records in some related tables with business components. For key attributes I use DBSequence type. So while creating new records I have temporary negative keys.
For some cases I need to calculate attribute values with a DB function. This function takes a key as a parameter and updates certain attributes.
For this on value change listener I call a ViewObject operation://backingbean value change listener
        if(...){
          ADFUtils.findOperation("function").execute();
// ViewObjectImpl::function() {
          getDBTransaction().createStatement().execute("declare x integer; begin x := func("
                       +getCurrentRow().getAttribute("IdContentVersion")+");end;");
}But nothing happens as I still have a temporary negative key and function can't find it.
For recieving the real key I trued to use getDBTransaction().postChanes();
But after that line getCurrentRow() returns null and now I don't have a pointer to the row.
I can't use a DB trigger for this.
I also do not want to call this function in doDML as I only need to it on change of one attribute.
Tried saving Row row = getCurrentRow() and calling the function with its key which becomes real and positive after postChanges(), but still no luck.
Seems, DB function can't find the row.
Need your advice, please.
Thanks.
ADF 11.1.1.4
up
Edited by: ILya Cyclone on Sep 30, 2011 2:27 PM

Ilya,
First of all, unless you have committed (or at least posted) the record to the DB, your function is not going to be able to see it, so you will have to get the record at least posted somehow.
Secondly, you can eagerly set the sequence value using a technique shown in [url http://download.oracle.com/docs/cd/E16162_01/web.1112/e16182/bcrules.htm#sthref308]the docs
John

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