如何设置Oracle Sequence 的值

写道

CREATE SEQUENCE gokhan.sample_seq START WITH 1000;

SELECT last_number
FROM user_sequences
WHERE sequence_name = 'SAMPLE_SEQ';

LAST_NUMBER
-----------
1000

ALTER SEQUENCE gokhan.sample_seq INCREMENT BY -500;
SELECT gokhan.sample_seq.NEXTVAL FROM dual;
ALTER SEQUENCE gokhan.sample_seq INCREMENT BY 1;

SELECT last_number
FROM user_sequences
WHERE sequence_name = 'SAMPLE_SEQ';

LAST_NUMBER
-----------
500

CREATE OR REPLACE PROCEDURE SYS.SEQUENCE_NEWVALUE(

seqowner VARCHAR2,

seqname VARCHAR2,

newvalue NUMBER) AS

ln NUMBER;

ib NUMBER;

BEGIN

SELECT last_number, increment_by

INTO ln, ib

FROM dba_sequences

WHERE sequence_owner = upper(seqowner)

AND sequence_name = upper(seqname);

EXECUTE IMMEDIATE 'ALTER SEQUENCE ' || seqowner || '.' || seqname ||

' INCREMENT BY ' || (newvalue - ln);

EXECUTE IMMEDIATE 'SELECT ' || seqowner || '.' || seqname ||

'.NEXTVAL FROM DUAL' INTO ln;

EXECUTE IMMEDIATE 'ALTER SEQUENCE ' || seqowner || '.' || seqname 

|| ' INCREMENT BY ' || ib;

END;

 

GRANT EXECUTE ON sequence_newvalue TO gokhan;

 

EXEC sequence_newvalue( 'GOKHAN', 'SAMPLE_SEQ', 10000 );