oracle序列创建以后，如果想重置序列从 0 开始，逐渐递增1，可以采用如下存储过程：
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 |
create or replace procedure reset_seq( p_seq_name in varchar2 ) is l_val number; begin execute immediate 'select ' || p_seq_name || '.nextval from dual' INTO l_val;
execute immediate 'alter sequence ' || p_seq_name || ' increment by -' || l_val || ' minvalue 0';
execute immediate 'select ' || p_seq_name || '.nextval from dual' INTO l_val;
execute immediate 'alter sequence ' || p_seq_name || ' increment by 1 minvalue 0'; end; |
存储过程创建以后，调用该存储过程，参数是要重置的序列名称：
call reset_seq(‘test_seq’);
使用下面的SQL语句查询需要重置的序列：
|
1 2 3 4 5 6 7 8 9 10 |
SELECT a.sequence_name 序列名称, a.min_value 序列最小值, to_char(to_number( a.max_value)) 序列最大值, a.last_number 序列当前值, CASE a.last_number WHEN 1 THEN '--不需要重置;' ELSE 'CALL seq_reset(''' || a.sequence_name || ''');' END 重置序列脚本, 'DROP SEQUENCE ' || a.sequence_name 删除序列脚本, 'RENAME ' || a.sequence_name || ' TO {newname}' 重命名脚本 FROM USER_SEQUENCES a WHERE a.last_number<>1 ORDER BY a.sequence_name ASC; |
