delete noprompt obsolete的时候报以下错误，删除不了。 单独执行delete datafilecopy “”；后，report obsolete还是能看到这几个datafilecopy。
RMAN-06207: WARNING: 9 objects could not be deleted for DISK channel(s) due
RMAN-06208: to mismatched status. Use CROSSCHECK command to fix status
RMAN-06210: List of Mismatched objects
RMAN-06211: ==========================
RMAN-06212: Object Type Filename/Handle
RMAN-06213: --------------- ---------------------------------------------------
RMAN-06214: Datafile Copy +PWDZXDATA/pwdzxrac/datafile/system01.dbf
RMAN-06214: Datafile Copy +PWDZXDATA/pwdzxrac/datafile/undotbs.dbf
RMAN-06214: Datafile Copy +PWDZXDATA/pwdzxrac/datafile/sysaux01.dbf
RMAN-06214: Datafile Copy +PWDZXDATA/pwdzxrac/datafile/users01.dbf
RMAN-06214: Datafile Copy +PWDZXDATA/pwdzxrac/datafile/undotbs2.dbf
RMAN-06214: Datafile Copy +PWDZXDATA/pwdzxrac/datafile/passpod_info.dbf
RMAN-06214: Datafile Copy +PWDZXDATA/pwdzxrac/datafile/resultinfo.dbf
RMAN-06214: Datafile Copy +PWDZXDATA/pwdzxrac/datafile/logoper.dbf
RMAN-06214: Datafile Copy +PWDZXDATA/pwdzxrac/datafile/passpodinfo_idx.dbf