awk中FS指定分隔符和IGNORECASE忽略大小写

[root@www ~]# cat 123.txt 

JDBC.URL=jdbc:oracle:thin:@127.0.0.1:1521:orcl

DBC.URL=jdbc:oracle:thin:@127.0.0.1:1521:orcl

DC.URL=jdbc:oracle:thin:@127.0.0.1:1521:orcl

[root@www ~]# echo "`cat 123.txt |grep -i ^jdbc.url | awk -F "=" '{print $2}'`1234567890"

jdbc:oracle:thin:@127.0.0.1:1521:orcl1234567890

[root@www ~]# echo "`awk 'BEGIN {FS="="} {IGNORECASE=1} /^jdbc.url/ {print $2}' 123.txt`1234567890"

jdbc:oracle:thin:@127.0.0.1:1521:orcl1234567890