APEX and CLOB value in trigger

Question

Hi,
I am using APEX 3.2.1 with Oracle 11gR1.
I have two tables:
CREATE TABLE "TSI"."ATT_TEST2"
(     "ID" NUMBER NOT NULL ENABLE,
     "TITLE" VARCHAR2(250 BYTE),
     "TOPIC" CLOB
and
CREATE TABLE "TSI"."ATT_TEST2"
(     "ID" NUMBER NOT NULL ENABLE,
     "TITLE" VARCHAR2(250 BYTE),
     "TOPIC" CLOB
My trigger is:
create or replace TRIGGER "TSI"."ATT_TEST_TRG"
BEFORE INSERT ON ATT_TEST
FOR EACH ROW
BEGIN
SELECT ATT_TEST_SEQ.NEXTVAL INTO :new.ID FROM DUAL;
insert into att_test2(id, title, topic) values (ATT_TEST_SEQ.NEXTVAL, :new.title, :new.topic);
END;
Now if I insert a record to ATT_TEST using SQL Developer ATT_TEST2 gets populated.
If create an APEX form and try to insert into ATT_TEST i get all the fields inserted into ATT_TEST2 except for the CLOB column. The TOPIC column is not copied into ATT_TEST2.
Any idea why this works from SQL Developer and not from APEX?
Thank you

Answer 1

Hello:
I believe this behaviour is seen because APEX uses the 'DBMS_LOB' API to update LOB/CLOB columns.For the example posted APEX does something like
INSERT INTO "ATT_TEST" ( "ID","TITLE","TOPIC") VALUES (:B1 ,REPLACE(:B2 ,'%null%',NULL),EMPTY_CLOB()) RETURNING ROWID INTO :0;
begin select "TOPIC" into wwv_flow.g_dml_clob_text from "ATT_TEST" where rowid = :p_rowid for update; end;
begin dbms_lob.write( wwv_flow.g_dml_clob_text, length(wwv_flow.g_dml_varchar32767_text), 1, wwv_flow.g_dml_varchar32767_text ); end;
varad