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oracle12c 推出了三个新的系统用户SYSBACKUP、SYSDG、SYSKM，下面文章源自官方文档
1、Administrative Privileges
Administrative privileges that are required for an administrator to perform basic
database operations are granted through the following special system privileges: ■ SYSDBA ■ SYSOPER ■ SYSBACKUP ■ SYSDG ■ SYSKM You must have one of these privileges granted to you, depending upon the level of authorization you require. Starting with Oracle Database 12c, the SYSBACKUP, SYSDG, and SYSKM administrative privileges are available. Each new administrative privilege grants the minimum required privileges to complete tasks ineach area of administration. The new administrative privileges enable you to avoid granting SYSDBAadministrative privilege for many common tasks. 来查询一下系统用户
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[oracle@test ~]$ sqlplus / as sysbackup
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SQL*Plus: Release 12.1.0.2.0 Production on Tue Mar 8 15:44:58 2016
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Copyright (c) 1982, 2014, Oracle. All rights reserved.
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Connected to :
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Oracle Database 12c Enterprise Edition Release 12.1.0.2.0 - 64bit Production
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With the Partitioning, OLAP, Advanced Analytics and Real Application Testing options
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SQL> select sys_context( 'USERENV' , 'CURRENT_SCHEMA' ) from dual;
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SYS_CONTEXT( 'USERENV' , 'CURRENT_SCHEMA' )
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--------------------------------------------------------------------------------
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SYS
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SQL> select sys_context( 'USERENV' , 'CURRENT_USER' ) from dual;
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SYS_CONTEXT( 'USERENV' , 'CURRENT_USER' )
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--------------------------------------------------------------------------------
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SYSBACKUP
概念
A new administration privilege, SYSBACKUP, allows Recovery Manager (RMAN) users to connect to the target database and run RMAN commands, no longer requiring SYSDBA.This feature enforces the separation of duty security model, whereby backup operators only need SYSBACKUP privilege to run RMAN commands and have separate responsibilities from database administrators who need real SYSDBA privileges.一个新的管理特权，SYSBACKUP，允许Recovery Manager(RMAN)用户连接到目标数据库，并运行RMAN命令，不再需要SYSDBA。这一特性强制执行了职责安全模型的分离，即备份操作符只需要SYSBACKUP权限来运行RMAN命令，并从需要真正的SYSDBA特权的数据库管理员那里承担独立的职责。RMAN连接到数据库的方式与SQL*Plus连接到数据库的方式相同。唯一的区别是，RMAN连接到目标或辅助数据库需要SYSDBA或SYSBACKUP特权。任何用户都可以授予此特权。
实验
以下操作是在Oracle 12.1.0.2.0 版本数据库中操作 1) 给PDB 用户test 赋予sysdba 权限，RMAN两种方式连接目标数据库，并操作RMAN 命令SQL> grant sysdba to test;Grant succeeded.[oracle@host1 ~]$ rman target test/test@pdbcndbaRecovery Manager: Release 12.1.0.2.0 - Production on Wed Aug 9 15:39:52 2017Copyright (c) 1982, 2014, Oracle and/or its affiliates. All rights reserved.connected to target database: CNDBA (DBID=215559030)[oracle@host1 ~]$ rmanRecovery Manager: Release 12.1.0.2.0 - Production on Wed Aug 9 15:40:44 2017Copyright (c) 1982, 2014, Oracle and/or its affiliates. All rights reserved.RMAN> connect target test/test@pdbcndbaconnected to target database: CNDBA (DBID=215559030)2）PDB 用户 cndba 赋予sysbackup 权限，RMAN后面一种方式连接目标数据库，并操作RMAN 命令SQL> create user cndba identified by cndba 2 /User created.SQL> grant sysbackup to cndba;Grant succeeded.[oracle@host1 ~]$ rman target /"cndba@pdbcndba as sysbackup/"Recovery Manager: Release 12.1.0.2.0 - Production on Wed Aug 9 15:26:30 2017Copyright (c) 1982, 2014, Oracle and/or its affiliates. All rights reserved.target database Password: RMAN-00571: ===========================================================RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============RMAN-00571: ===========================================================RMAN-00554: initialization of internal recovery manager package failedRMAN-04005: error from target database: ORA-01031: insufficient privileges[oracle@host1 ~]$ rman Recovery Manager: Release 12.1.0.2.0 - Production on Wed Aug 9 15:34:38 2017Copyright (c) 1982, 2014, Oracle and/or its affiliates. All rights reserved.RMAN> connect target "cndba/cndba@pdbcndba as sysbackup"connected to target database: CNDBA (DBID=215559030)RMAN> list backup;using target database control file instead of recovery catalogList of Backup Sets===================BS Key Type LV Size Device Type Elapsed Time Completion Time------- ---- -- ---------- ----------- ------------ ---------------28 Full 715.90M DISK 00:00:33 09-AUG-17 BP Key: 33 Status: AVAILABLE Compressed: NO Tag: TAG20170809T002639 Piece Name: /u01/app/oracle/fast_recovery_area/CNDBA/55DE010CACAA2E2FE055FE1D161C38B5/backupset/2017_08_09/o1_mf_nnndf_TAG20170809T002639_drmso99v_.bkp List of Datafiles in backup set 28 File LV Type Ckp SCN Ckp Time Name ---- -- ---- ---------- --------- ---- 8 Full 3011898 09-AUG-17 /u01/app/oracle/oradata/cndba/pdbcndba/system01.dbf 9 Full 3011898 09-AUG-17 /u01/app/oracle/oradata/cndba/pdbcndba/sysaux01.dbf 10 Full 3011898 09-AUG-17 /u01/app/oracle/oradata/cndba/pdbcndba/pdbcndba_users01.dbf 11 Full 3011898 09-AUG-17 /u01/app/oracle/oradata/cndba/pdbcndba/test01.dbfRMAN> backup datafile 11;Starting backup at 09-AUG-17allocated channel: ORA_DISK_1channel ORA_DISK_1: SID=61 device type=DISKchannel ORA_DISK_1: starting full datafile backup setchannel ORA_DISK_1: specifying datafile(s) in backup setinput datafile file number=00011 name=/u01/app/oracle/oradata/cndba/pdbcndba/test01.dbfchannel ORA_DISK_1: starting piece 1 at 09-AUG-17channel ORA_DISK_1: finished piece 1 at 09-AUG-17piece handle=/u01/app/oracle/fast_recovery_area/CNDBA/55DE010CACAA2E2FE055FE1D161C38B5/backupset/2017_08_09/o1_mf_nnndf_TAG20170809T153759_drogyqm1_.bkp tag=TAG20170809T153759 comment=NONEchannel ORA_DISK_1: backup set complete, elapsed time: 00:00:03Finished backup at 09-AUG-17Starting Control File and SPFILE Autobackup at 09-AUG-17piece handle=/u01/app/oracle/fast_recovery_area/CNDBA/autobackup/2017_08_09/o1_mf_s_951579482_drogyvl6_.bkp comment=NONEFinished Control File and SPFILE Autobackup at 09-AUG-17
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