Delete flashback log dynamically.

Question

i want to delete flashback log dynamically.
suppose today is 1st feb while running shell script it will remove flashback log 31stjan ...
i have set retention policy 1 days.
following is the my sh script
=====================
#!/bin/sh
# Daily Backup
. oraenv.oratest
export NLS_DATE_FORMAT="Dy DD-Mon-YYYY HH24:MI:SS"
LOG_DIR="/var/log/oracle"
LOG_FILE="$LOG_DIR/$ORACLE_SID-daily-backup.log"
EMAIL_TO="[email protected]"
echo -e "\nBackup Commenced: " $(date) "\n"
pushd $HOME/rman
rman target / cmdfile="daily-backup.rman" log="$LOG_FILE" append
retcode=$?
if [ "$retcode" -ne "0" ]; then
echo -e "\n***\n*** BACKUP FAILURE: Database $ORACLE_SID on $HOSTNAME \n***"
mail -s "BACKUP FAILURE: Database $ORACLE_SID on $HOSTNAME" $EMAIL_TO < $LOG_FILE
exit 1
else
mail -s "INFO: Backup success: $ORACLE_SID on $HOSTNAME" $EMAIL_TO << EOF
Database $ORACLE_SID on $HOSTNAME backed up successfully.
EOF
fi
popd
echo -e "\nBackup Completed: " $(date) "\n"
rman script
run {
# Remove any obsolete files prior to backup
crosscheck backupset;
crosscheck copy;
delete noprompt obsolete;
delete noprompt expired backup;
delete noprompt expired copy;
# Incremental backup and update of current image copy
allocate channel oem_disk_backup device type disk;
recover copy of database with tag 'ORA\$OEM_LEVEL_0';
delete noprompt obsolete;
delete noprompt expired backup;
delete noprompt expired copy;
backup incremental level 1 cumulative copies=1 for recover of copy with tag 'ORA\$OEM_LEVEL_0' database;
# Following backup - remove any now-obsolete files
delete noprompt obsolete;
delete noprompt expired backup;
delete noprompt expired copy;

Answer 1

RMAN cannot delete flashback logs, these are maintained automatically according to parameter 'db_flashback_retention_target'. Don't confuse FLASHBACK DATABASE with RMAN point-in-time recovery.
RMAN backups become obsolete as soon as no longer needed to meet the defined retention policy, 'delete obsolete' will never delete flashback logs.