ORA-01925:maximum of 80 enabled roles exceeded

ORA-01925:maximum of 80 enabled roles exceeded

max_enabled_roles 9i的參数，10g及以后都不用了。

指定用户session的最大enabled roles数。

MAX_ENABLED_ROLES specifies the maximum number of database roles that users can enable, including roles contained within other roles. The actual number of roles that users can enable is 2 plus the value of MAX_ENABLED_ROLES,
because each user has two additional roles, PUBLIC and the user's own role.

For example, if MAX_ENABLED_ROLES is set to 5, then user HR can have seven roles enabled (the five enabled by MAX_ENABLED_ROLES, plus PUBLIC and HR).

查查系统用得比較多role的用户，但这样查出来，还不包含以role授予给role再授予用户的嵌套情况

select grantee,count(*) from dba_role_privs group by grantee order by count(*) desc;

也能够直接查当前会话enable的role数量

select count(*) from session_roles;

假设用户登陆不上了，必定是授予太多role了。

能够改大參数，但要重新启动库。

alter system set max_enabled_roles=148 scope=spfile;

嗯，最大值是148。不能设置为更大的了