Rman 中的delete input的用法

Rman 中的delete input

看到有個說法， rman backup帶 delete [all] input適用於datafile ,backup sets and archived log file.
做了實驗，發現應用在 datafile時，rman會 報錯：
RMAN> backup datafile 12
2> format '/oradata/data/rman/standby/t2.bak'
3> delete input;

Starting backup at 27-JUN-08
allocated channel: ORA_DISK_1
channel ORA_DISK_1: sid=16 devtype=DISK
allocated channel: ORA_DISK_2
channel ORA_DISK_2: sid=17 devtype=DISK
allocated channel: ORA_DISK_3
channel ORA_DISK_3: sid=18 devtype=DISK
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of backup command at 06/27/2008 18:54:47
RMAN-06030: the DELETE [ALL] INPUT option may not be used with a datafile backup set

不能全信書；

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