extradb() {
for db in "$MYSQL_EXTRADB"; do
mysql $mysql_flags <<EOSQL
      GRANT ALL ON \`${db}\`.* TO '${MYSQL_USER}'@'%' ;
      FLUSH PRIVILEGES ;
EOSQL
done;
}

if [ -v MYSQL_EXTRADB ]; then 
    extradb
fi

unset -f extradb