编写一个脚本，oracle数据库使用rman的一周的备份脚本，要求，周三做全备份，其他时间做增量备份

#!/bin/bash

# Set the Oracle Environment Variables
export ORACLE_HOME=/u01/app/oracle/product/12.1.0/dbhome_1
export ORACLE_SID=ORCL

# Set the backup location
export BACKUP_DIR=/u01/backup

# Get the day of the week
DAY=$(date +%A)

# Create the backup directory if it doesn't exist
if [ ! -d "$BACKUP_DIR" ]; then
mkdir "$BACKUP_DIR"
fi

# Do a full backup on Wednesday and incremental backups on other days
if [ "$DAY" == "Wednesday" ]; then
rman target / << EOF
run {
allocate channel ch1 type disk;
backup database plus archivelog;
release channel ch1;
}
exit;
EOF
else
rman target / << EOF
run {
allocate channel ch1 type disk;
backup incremental level 1 database plus archivelog;
release channel ch1;
}
exit;
EOF
fi

# Move the backup to the backup directory
mv /u01/app/oracle/fast_recovery_area/ORCL/backupset/* "$BACKUP_DIR"

# Delete backups older than 7 days
find "$BACKUP_DIR" -name "*.bkp" -mtime +7 -exec rm {} \;