Resetting the Sequence operator in OWB

Question

I have a Sequence operator for one column in the mapping. It correctly increments by 1 for each row (nextval) . I have done some testing and now I want to reset the next increments. Like I want to start from 1 instead of some 588 like that which is result of my testing.
How to reset the sequence operator so that it starts from 1 again.
Thanks

Answer 1

Hi Tom,
First you should create a store procedure that resets the last_number of a specified sequence w/ parameters sequence_name and start value. Then just call the stored proc from OWB to reset your sequence.
--stored proc ex:
create or replace PROCEDURE reset_sequence (
seq_name IN VARCHAR2, startvalue IN PLS_INTEGER) AS
cval INTEGER;
inc_by VARCHAR2(25);
BEGIN
EXECUTE IMMEDIATE 'ALTER SEQUENCE ' ||seq_name||' MINVALUE 0';
EXECUTE IMMEDIATE 'SELECT ' ||seq_name ||'.NEXTVAL FROM dual'
INTO cval;
cval := cval - startvalue + 1;
IF cval < 0 THEN
inc_by := ' INCREMENT BY ';
cval:= ABS(cval);
ELSE
inc_by := ' INCREMENT BY -';
END IF;
EXECUTE IMMEDIATE 'ALTER SEQUENCE ' || seq_name || inc_by ||
cval;
EXECUTE IMMEDIATE 'SELECT ' ||seq_name ||'.NEXTVAL FROM dual'
INTO cval;
EXECUTE IMMEDIATE 'ALTER SEQUENCE ' || seq_name ||
' INCREMENT BY 1';
END reset_sequence;
--calling stored proc ex:
--sequence name is employees_seq; reset value to 1
DECLARE
SEQ_NAME VARCHAR2(200);
STARTVALUE PLS_INTEGER;
BEGIN
SEQ_NAME := 'EMPLOYEES_SEQ';
STARTVALUE := 1;
RESET_SEQUENCE(
SEQ_NAME => SEQ_NAME,
STARTVALUE => STARTVALUE
END;
Hope it works! Cheers!=)
Regards,
Carlo