+function upgrade_to_20(){
+ echo " Add 'image_size' to 'instance_devices'"
+ echo "ALTER TABLE instance_devices ADD COLUMN image_size INT NULL DEFAULT NULL AFTER dev;" | $DBCMD || ! echo "ERROR. Aborted!" || exit -1
+ echo "INSERT INTO schema_version (version_int, version, openvim_ver, comments, date) VALUES (20, '0.20', '0.5.17', 'Add image_size to instance_devices', '2017-06-01');"\
+ | $DBCMD || ! echo "ERROR. Aborted!" || exit -1
+
+
+}
+
+function downgrade_from_20(){
+ echo " Delete 'image_size' from 'instance_devices'"
+ echo "ALTER TABLE instance_devices DROP COLUMN image_size;" | $DBCMD || ! echo "ERROR. Aborted!" || exit -1
+ echo "DELETE FROM schema_version WHERE version_int = '20';" | $DBCMD || ! echo "ERROR. Aborted!" || exit -1
+}