Sequence jump issue

Question

My case is to keep capture the change data, not for dim/fact table but for ods level: if any delete/update, updated expire date then insert a new one, if insert then insert. use sequence as surogarnt.
My logic used is using full join to contains all changed data then splitter them to the same target table 5 times. all seems ok except for the sequence number,it will jump.there are alway sequence gap. in this case sequence number increase quickly.
I have went through the forum,metalink, asked OWB expert, but didnot get the answer for a whole day.I changed the set base to raw base,it didn't work; removed the update part to avoid merge, but sequence still jump. how to handle it? any advince? thanks a lot.
Donny

Answer 1

Hi Jorg,
You are right, after I tried other ways I gave it up due to time limition, I aslo used what you advised here, here are my procedure code : (first disable constraint in another procedure, pre mapping). Thanks a lot.
CREATE OR REPLACE PROCEDURE rds_set_sequence
IS
p_init_num NUMBER;
lv_target_tab VARCHAR2 (40);
lv_pk_name VARCHAR2 (40);
SQL_disable VARCHAR2 (200);
CURSOR cur_key
IS
SELECT ROWID, rds_key
FROM rds_xls_ref_source_systems
WHERE rds_key IS NULL;
BEGIN
BEGIN
SELECT NVL (MAX (rds_key), 0)
INTO p_init_num
FROM rds_xls_ref_source_systems
WHERE rds_key IS NOT NULL;
EXCEPTION
WHEN NO_DATA_FOUND
THEN
DBMS_OUTPUT.put_line ('No data found : ' || SQLERRM);
END;
FOR cursor_key IN cur_key
LOOP
EXIT WHEN cur_key%NOTFOUND;
p_init_num := p_init_num + 1;
UPDATE rds_xls_ref_source_systems
SET rds_key = p_init_num
WHERE ROWID = cursor_key.ROWID;
-- DBMS_OUTPUT.put_line ('seq number : ' || TO_CHAR (p_init_num));
END LOOP;
COMMIT;
EXECUTE IMMEDIATE 'ALTER TABLE RDS_XLS_REF_SOURCE_SYSTEMS ENABLE CONSTRAINT RDS_XLS_RSS_PK';
EXCEPTION
WHEN OTHERS
THEN
DBMS_OUTPUT.put_line ('Error on updating the table : ' || SQLERRM);
ROLLBACK;
END rds_set_sequence;
/