可通过存储过程进行序列当前值的修改。
create OR REPLACE
procedure SETVAL
(
sch IN VARCHAR2, –模式名
tab IN VARCHAR2, –序列名
num IN NUMBER) –修改为什么值
AS
var1 NUMBER; –当前序列的下一个值
var2 NUMBER; –当前序列的下两个值
var3 NUMBER; –原序列步长
p_sql1 varchar2;
p_sql2 varchar2;
p_sql3 varchar2; –删除原来的序列
p_sql4 varchar2; –重新创建序列
dbms varchar2;
v_cursor1 varchar2;
begin
v_cursor1 := DBMS_SQL.OPEN_CURSOR;
p_sql1 := ‘SELECT ‘||sch||’.’||tab||’.NEXTVAL FROM dual;’;
execute immediate p_sql1 into var1;
p_sql2 := ‘SELECT ‘||sch||’.’||tab||’.NEXTVAL FROM dual;’;
execute immediate p_sql2 into var2;
–计算原步长
var3 := var2 – var1;
p_sql3 := ‘drop sequence ‘||sch||’.’||tab||’;’;
dbms_sql.parse(v_cursor1, p_sql3, dbms);
DBMS_SQL.EXECUTE(v_cursor1);
p_sql4 := ‘CREATE SEQUENCE ‘||sch||’.’||tab||’ INCREMENT BY ‘||var3||’ START WITH ‘||num||’ MAXVALUE 999999 MINVALUE 1 ORDER;’;
dbms_sql.parse(v_cursor1, p_sql4, dbms);
DBMS_SQL.EXECUTE(v_cursor1);
dbms_sql.close_cursor(v_cursor1);
end;