告警升级公告
tdsql_ 前缀，且要求 proxy 版本最低为1.19.5-M-V2.0R745D005；可通过数据库管理语句 /*Proxy*/show status 查询 proxy 版本，若 proxy 版本较老可以 提交工单 进行升级。CREATE TDSQL_SEQUENCE 序列名[START WITH n][{TDSQL_MINVALUE/ TDSQL_MAXMINVALUE n| TDSQL_NOMAXVALUE}][TDSQL_INCREMENT BY n][{TDSQL_CYCLE|TDSQL_NOCYCLE}]
create tdsql_sequence test.s1 start with 12 tdsql_minvalue 10 maxvalue 50000 tdsql_increment by 5 tdsql_nocyclecreate tdsql_sequence test.s2 start with 12 tdsql_minvalue 10 maxvalue 50000 tdsql_increment by 1 tdsql_cycle
drop tdsql_sequence test.s1;
select tdsql_nextval(test.s2);select next value for test.s2;
mysql> select tdsql_nextval(test.s1);+----+| 12 |+----+| 12 |+----+1 row in set (0.18 sec)mysql> select tdsql_nextval(test.s2);+----+| 12 |+----+| 12 |+----+1 row in set (0.13 sec)mysql> select tdsql_nextval(test.s1);+----+| 17 |+----+| 17 |+----+1 row in set (0.01 sec)mysql> select tdsql_nextval(test.s2);+----+| 13 |+----+| 13 |+----+1 row in set (0.00 sec)mysql> select next value for test.s1;+----+| 22 |+----+| 22 |+----+1 row in set (0.01 sec)
mysql> select * from test.t1;+----+------+| a | b |+----+------+| 11 | 2 |+----+------+1 row in set (0.00 sec)mysql> insert into test.t1(a,b) values(tdsql_nextval(test.s2),3);Query OK, 1 row affected (0.01 sec)mysql> select * from test.t1;+----+------+| a | b |+----+------+| 11 | 2 || 14 | 3 |+----+------+2 rows in set (0.00 sec)
select tdsql_lastval(test.s1);select tdsql_previous value for test.s1;
mysql> select tdsql_lastval(test.s1);+----+| 22 |+----+| 22 |+----+1 row in set (0.00 sec)mysql> select tdsql_previous value for test.s1;+----+| 22 |+----+| 22 |+----+1 row in set (0.00 sec)
select tdsql_setval(test.s2,1000,bool use) // use 默认为1，表示1000这个值用过了，下一次不包含1000，如果为0，则下一个从1000开始。
mysql> select tdsql_nextval(test.s2);+----+| 15 |+----+| 15 |+----+1 row in set (0.01 sec)mysql> select tdsql_setval(test.s2,10);+---+| 0 |+---+| 0 |+---+1 row in set (0.03 sec)mysql> select tdsql_nextval(test.s2);+----+| 16 |+----+| 16 |+----+
mysql> select tdsql_setval(test.s2,20);+----+| 20 |+----+| 20 |+----+1 row in set (0.02 sec)mysql> select tdsql_nextval(test.s2);+----+| 21 |+----+| 21 |+----+1 row in set (0.01 sec)
select tdsql_resetval(test.s2,1000);
mysql> select tdsql_resetval(test.s2,14);+----+| 14 |+----+| 14 |+----+1 row in set (0.00 sec)mysql> select tdsql_nextval(test.s2);+----+| 14 |+----+| 14 |+----+1 row in set (0.01 sec)
TDSQL_ 前缀开始：TDSQL_ 前缀。TDSQL_CYCLETDSQL_INCREMENTTDSQL_LASTVALTDSQL_MINVALUETDSQL_NEXTVALTDSQL_NOCACHETDSQL_NOCYCLETDSQL_NOMAXVALUETDSQL_NOMINVALUETDSQL_PREVIOUSTDSQL_RESTARTTDSQL_REUSETDSQL_SEQUENCETDSQL_SETVAL
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