报错信息如下: ---查看_optimizer_join_elimination_enabled参数值 切换sys用户 select a.ksppinm name, b.ksppstvl value, a.ksppdesc description from x$ksppi a, x$ksppcv b where a.indx = b.indx and a.ksppinm = '_optimizer_join_elimination_enabled'; 解决办法: 在数据库服务器上用sys账户登录