"returning into" result is null with insert operation (only in apex)

Question

I'm attempting to capture my primary key or the rowid identifying a particular row when inserted into a table (9.2.0.8) and placing it into an apex variable. I've not been successful using the following methodology. My plsql inserts my data into SM_ORDER successfully. Any suggestions?
MY TABLE -
CREATE TABLE "SM_ORDER"
+( "ORDER_ID" NUMBER NOT NULL ENABLE,+
++ "CUSTOMER_ID" NUMBER NOT NULL ENABLE,++
++ "SAMACCOUNTNAME" VARCHAR2(20) NOT NULL ENABLE,++
++ "ORDER_DATE" DATE NOT NULL ENABLE,++
++ CONSTRAINT "SM_ORDER_PK" PRIMARY KEY ("ORDER_ID") ENABLE++
+)+
+/+
CREATE OR REPLACE TRIGGER "BI_SM_ORDER"
before insert on "SM_ORDER"
for each row
begin
if :NEW."ORDER_ID" is null then
select "SM_ORDER_SEQ".nextval into :NEW."ORDER_ID" from dual;
end if;
end;
+/+
ALTER TRIGGER "BI_SM_ORDER" ENABLE
+/+
MY PLSQL -
declare
r rowid;
order_id_hold number;
begin
select SM_ORDER_SEQ.nextval
into order_id_hold
from dual;
insert into SM_ORDER (CUSTOMER_ID,
SAMACCOUNTNAME,
ORDER_DATE)
values (:F111_CURRENT_CUSTOMER,
+:APP_USER,+
SYSDATE)
returning ORDER_ID
into order_id_hold;
+:P5_ORDER_ID_HOLD := order_id_hold;+
end;
NOTE: If I do it as a straight SQL statement, it works fine.
declare
r rowid;
order_id_hold number;
begin
select      SM_ORDER_SEQ.nextval
into       order_id_hold
from       dual;
insert into SM_ORDER (CUSTOMER_ID,
SAMACCOUNTNAME,
ORDER_DATE)
values              (:F111_CURRENT_CUSTOMER,
+:APP_USER,+
SYSDATE)
returning             ORDER_ID
into                  order_id_hold;
dbms_output.put_line (order_id_hold);
end;
+/+
*49*
*1 row(s) inserted.*
*0.04 seconds*
Thank you!
Paul

Answer 1

I have something similar in one of my applications.
Have you tried it like this?
CREATE OR REPLACE TRIGGER "BI_SM_ORDER"
before insert on "SM_ORDER"
for each row
l_order_id number;
begin
  select SM_ORDER_SEQ.nextval into l_order_id from dual;
:NEW.ORDER_ID := l_order_id;
end;
*Your PLSQL* -
declare
  r rowid;
  order_id_hold number;
begin
  insert into SM_ORDER (CUSTOMER_ID,
                       SAMACCOUNTNAME,
                       ORDER_DATE)
  values (:F111_CURRENT_CUSTOMER,
             :APP_USER,
             SYSDATE)
  returning ORDER_ID
  into order_id_hold;
  :P5_ORDER_ID_HOLD := order_id_hold;
end;The if-then in your trigger was redundant, so was the select-nextval in your PL/SQL. This exact structure works for me.