GUACAMOLE-36: Define and map historical password record table.

extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-mysql/schema/upgrade/upgrade-pre-0.9.11.sql

@@ -23,3 +23,26 @@
 
 ALTER TABLE guacamole_user
     ADD COLUMN password_date DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP;
+
+--
+-- User password history
+--
+
+CREATE TABLE guacamole_user_password_history (
+
+  `password_history_id` int(11) NOT NULL AUTO_INCREMENT,
+  `user_id`             int(11) NOT NULL,
+
+  -- Salted password
+  `password_hash` binary(32) NOT NULL,
+  `password_salt` binary(32),
+  `password_date` datetime   NOT NULL,
+
+  PRIMARY KEY (`password_history_id`),
+  KEY `user_id` (`user_id`),
+
+  CONSTRAINT `guacamole_user_password_history_ibfk_1`
+    FOREIGN KEY (`user_id`)
+    REFERENCES `guacamole_user` (`user_id`) ON DELETE CASCADE
+
+) ENGINE=InnoDB DEFAULT CHARSET=utf8;