mysqldump with Wildcard

#!/bin/bash
if [ $# -lt 2 ]
then
        echo "Usage: `basename $0` database wildcardpattern"
        echo "Eg: `basename $0` mydatabase App_%"
        exit 1
fi
database=$1
pattern=$2
mysqldump $database `mysql -ND $database -e "SHOW TABLES LIKE '$pattern'" | awk '{printf $1" "}'`