[20190524]disable table lock(12c).txt
–//如果禁止table lock时,一些ddl操作会被禁止.但是我有点吃惊的是增加字段不受限制.
–//链接:http://blog.itpub.net/267265/viewspace-2645161/=>[20190522]disable table lock.txt
–//昨天kerrycode给我反馈,10g和11g某个版本增加1列会遇到ora-00069错误.
1.环境:
scott@test01p> @ ver1
port_string version banner con_id
—————————— ————– ——————————————————————————– ———-
ibmpc/win_nt64-9.1.0 12.2.0.1.0 oracle database 12c enterprise edition release 12.2.0.1.0 – 64bit production 0
scott@test01p> create table t as select rownum id from dual ;
table created.
scott@test01p> alter table t disable table lock;
table altered.
2.测试:
scott@test01p> truncate table t;
truncate table t
*
error at line 1:
ora-00069: cannot acquire lock — table locks disabled for t
scott@test01p> alter table t add v1 varchar2(10);
alter table t add v1 varchar2(10)
*
error at line 1:
ora-00069: cannot acquire lock — table locks disabled for t
–//很明显11.2.0.4下存在问题,估计遇到了bug,我自己都无法理解在11.2.0.4下的测试结果.