+function upgrade_to_18(){
+ echo " Add 'region' at 'nets' and change unique index vlan+region"
+ echo "ALTER TABLE nets ADD COLUMN region VARCHAR(64) NULL DEFAULT NULL AFTER admin_state_up, " \
+ "DROP INDEX type_vlan;" | $DBCMD || ! echo "ERROR. Aborted!" || exit -1
+ echo " Fill 'region' with __OVS__/__DATA__ for OVS/openflow provider at nets"
+ echo "UPDATE nets set region='__OVS__' where provider like 'OVS%';" | $DBCMD || ! echo "ERROR. Aborted!" || exit -1
+ echo "UPDATE nets set region='__DATA__' where type='data' or type='ptp';" | $DBCMD || ! echo "ERROR. Aborted!" ||
+ exit -1
+ echo " Create new index region_vlan at nets"
+ echo "ALTER TABLE nets ADD UNIQUE INDEX region_vlan (region, vlan);" \
+ | $DBCMD || ! echo "ERROR. Aborted!" || exit -1
+ echo "INSERT INTO schema_version (version_int, version, openvim_ver, comments, date) "\
+ "VALUES (18, '0.18', '0.5.13', 'Add region to nets, change vlan unique index', '2017-05-03');"\
+ | $DBCMD || ! echo "ERROR. Aborted!" || exit -1
+}
+
+function downgrade_from_18(){
+ echo " Delete 'region' at 'nets' and change back unique index vlan+type"
+ echo "ALTER TABLE nets DROP INDEX region_vlan, DROP COLUMN region;" | $DBCMD || ! echo "ERROR. Aborted!" || exit -1
+ echo " Create back index type_vlan at nets"
+ echo "ALTER TABLE nets ADD UNIQUE INDEX type_vlan (type, vlan);" | $DBCMD || ! echo "ERROR. Aborted!" || exit -1
+ echo "DELETE FROM schema_version WHERE version_int = '18';" | $DBCMD || ! echo "ERROR. Aborted!" || exit -1
+}
+
+function upgrade_to_19(){
+ echo " Add 'keyfile' to 'hosts'"
+ echo "ALTER TABLE hosts ADD COLUMN keyfile VARCHAR(255) NULL DEFAULT NULL AFTER password;" \
+ | $DBCMD || ! echo "ERROR. Aborted!" || exit -1
+ echo "INSERT INTO schema_version (version_int, version, openvim_ver, comments, date) "\
+ "VALUES (19, '0.19', '0.5.15', 'Add keyfile to hosts', '2017-05-23');"\
+ | $DBCMD || ! echo "ERROR. Aborted!" || exit -1
+}
+
+function downgrade_from_19(){
+ echo " Delete 'keyfile' from 'hosts'"
+ echo "ALTER TABLE hosts DROP COLUMN keyfile;" | $DBCMD || ! echo "ERROR. Aborted!" || exit -1
+ echo "DELETE FROM schema_version WHERE version_int = '19';" | $DBCMD || ! echo "ERROR. Aborted!" || exit -1
+}
+
+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
+}
+
+function upgrade_to_21(){
+ echo " Add 'routes', 'links' and 'dns' to 'nets'"
+ echo "ALTER TABLE nets ADD COLUMN dns VARCHAR(255) NULL AFTER gateway_ip,
+ ADD COLUMN links TEXT(2000) NULL AFTER dns,
+ ADD COLUMN routes TEXT(2000) NULL AFTER links;" | $DBCMD || ! echo "ERROR. Aborted!" || exit -1
+ echo "INSERT INTO schema_version (version_int, version, openvim_ver, comments, date) VALUES (21, '0.21', '0.5.18', 'Add routes, links and dns to inets', '2017-06-21');"\
+ | $DBCMD || ! echo "ERROR. Aborted!" || exit -1
+}
+
+function downgrade_from_21(){
+ echo " Delete 'routes', 'links' and 'dns' to 'nets'"
+ echo "ALTER TABLE nets DROP COLUMN dns, DROP COLUMN links, DROP COLUMN routes;" | $DBCMD || ! echo "ERROR. Aborted!" || exit -1
+ echo "DELETE FROM schema_version WHERE version_int = '21';" | $DBCMD || ! echo "ERROR. Aborted!" || exit -1
+}
+
+