postgresql上使用
- select currval('follow_id_seq');
报错：
- currval of sequence "follow_id_seq" is not yet defined in this session
查阅参考资料，发现错误原因是要查当前值，必须先取一次next：执行以下语句，执行成功：
- dbname=# select nextval('follow_id_seq');
- nextval
- ---------
- 5347
- (1 row)
- dbname=# select currval('follow_id_seq');
- currval
- ---------
- 5347
- (1 row)
http://sunboyyyl.blog.163.com/blog/static/224738120099135521859/