--- /dev/null
+/*
+ * DB migration from v01 to v02 (firebird)
+ */
+
+CREATE DOMAIN DM_TARIFF_PERIOD AS VARCHAR(32) NOT NULL
+ CHECK (VALUE = 'month' OR VALUE = 'day');
+
+ALTER TABLE tb_tariffs ADD period DM_TARIFF_PERIOD DEFAULT 'month';
+
+CREATE TABLE tb_info
+(
+ version INTEGER NOT NULL
+);
+
+INSERT INTO tb_info VALUES (1);