Added history table

misc/update_1.1_to_1.2.sql

@@ -49,3 +49,33 @@ ADD CONSTRAINT `FK_USER_PART`
   FOREIGN KEY (`participant_id`)
   REFERENCES `bremen_calling_devel`.`participant` (`id`);
 
+-- History table for change tracking
+
+CREATE TABLE `bremen_calling_devel`.`history` (
+  `id` INT UNSIGNED NOT NULL AUTO_INCREMENT,
+  `participant_id` INT UNSIGNED NOT NULL,
+  `ship_id` INT UNSIGNED NOT NULL,
+  `timestamp` DATETIME NOT NULL COMMENT 'Time of saving',
+  `eta` DATETIME NOT NULL COMMENT 'Current ETA / ETD value (depends if shipcall or times were saved)',
+  `type` INT NOT NULL COMMENT 'shipcall or times',
+  `operation` INT NOT NULL COMMENT 'insert, update or delete',
+  PRIMARY KEY (`id`))
+COMMENT = 'This table stores a history of changes made to shipcalls so that everyone can see who changed what and when';
+
+-- and foreign keys
+
+ALTER TABLE `bremen_calling_devel`.`history`
+ADD INDEX `FK_HISTORY_PARTICIPANT_idx` (`participant_id` ASC) VISIBLE,
+ADD INDEX `FK_HISTORY_SHIP_idx` (`ship_id` ASC) VISIBLE;
+;
+ALTER TABLE `bremen_calling_devel`.`history`
+ADD CONSTRAINT `FK_HISTORY_PARTICIPANT`
+  FOREIGN KEY (`participant_id`)
+  REFERENCES `bremen_calling_devel`.`participant` (`id`)
+  ON DELETE NO ACTION
+  ON UPDATE NO ACTION,
+ADD CONSTRAINT `FK_HISTORY_SHIP`
+  FOREIGN KEY (`ship_id`)
+  REFERENCES `bremen_calling_devel`.`ship` (`id`)
+  ON DELETE NO ACTION
+  ON UPDATE NO ACTION;