+function upgrade_to_31(){
+ echo " Add 'vim_network_name' at 'sce_nets'"
+ sql "ALTER TABLE sce_nets ADD COLUMN vim_network_name VARCHAR(255) NULL DEFAULT NULL AFTER description;"
+ sql "INSERT INTO schema_version (version_int, version, openmano_ver, comments, date) "\
+ "VALUES (31, '0.31', '0.5.61', 'Add vim_network_name to sce_nets', '2018-05-03');"
+}
+function downgrade_from_31(){
+ echo " Remove back 'vim_network_name' from 'sce_nets'"
+ sql "ALTER TABLE sce_nets DROP COLUMN vim_network_name;"
+ sql "DELETE FROM schema_version WHERE version_int='31';"
+}