Infinite recursive loop in Ruleframe generated CAPI-function (display_label)

Question

On our project we want to inforce a business rule that enforces that a row won't reference itself in a table like the following:
create table ear as
( id number (10) primary key
parent_id number (10) references ear (id)
;so
insert into ear
(id, parent_id)
values
(42, 42)
/generates an error.
In order to reach this end we defined a BR (a RER), transformed it, using the headstart business rule design transformer, and entered some code like this:
if p_parent_id is not null
then
l_rule_ok := p_parent_id <> p_id;
end if;This works, however, if we enter the abovementioned insert-statement and the capi tries to process the rule violation (using qms_transaction_mgt.process_rule_violation), it tries generating a display-label using the display_label CAPI function, which contains (between useful code) a non-terminating recursive loop:
function display_label ( ... parameters ...) is
-- ...usefull code
if substr(l_mask, 2, 1) = '1'
and l_ear_row.parent_id is not null
then
l_display_label :=
l_display_label
&#0124; &#0124;', '
&#0124; &#0124;app_ear_capi.display_label
( p_id => l_ear_row.parent_id
end if; -- substr(l_mask, 2, 1) = '1'
-- more usefull code ...
end display_label;Which behaves very unpleasant when p_id = p_parent_id ...
An (greatly unsatisfying) idea we have to circumvent this behavior is making a manual hack in the generated code that either removes the recursive call or enters some stop-condition-like behaviour ( adding the parameter p_mask with the value '10', so the parent-id won't be processed a seccond time round).
Any good options around?
P.S.
We are using HSU_CAPI 6.5.1.0; db 8.1.7 enterprise (on a VAX); des6i(6.5.46.1)
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Answer 1

<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by Headstart Team:
My best guess is that when you look at your table definition in Designer, and go to the foreign key column (parent_id), the "Descriptor Sequence" property is set. Kind regards,
Peter<HR></BLOCKQUOTE>
Alas, the Descriptor Sequence property for the parent_id is empty. The only other thing "out of the ordinary" is the presence of the tags <EXISTS_ROW><AGGREGATE_VALUE> in the notes-field (which, however, is exactly as it shoud be according to the User Guide)
Kind regards,
Sander
([email protected])
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