add unique index for registry_no in school

module/schools/data/schema.mysql.sql

@@ -147,25 +147,26 @@ DROP TABLE IF EXISTS `school`;
 CREATE TABLE `school` (
   `id` int(11) unsigned NOT NULL AUTO_INCREMENT,
   `registry_no` varchar(25) COLLATE utf8mb4_unicode_ci NOT NULL,
-  `name` varchar(191) CHARACTER SET utf8mb4 NOT NULL,
-  `street_address` varchar(191) CHARACTER SET utf8mb4 NOT NULL,
-  `postal_code` varchar(10) COLLATE utf8mb4_unicode_ci NOT NULL,
-  `phone_number` varchar(25) COLLATE utf8mb4_unicode_ci NOT NULL,
-  `fax_number` varchar(25) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
-  `email` varchar(255) CHARACTER SET utf8mb4 NOT NULL,
-  `municipality` varchar(255) CHARACTER SET utf8mb4 DEFAULT NULL,
+  `name` varchar(255) COLLATE utf8mb4_unicode_ci NOT NULL,
+  `street_address` varchar(255) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
+  `postal_code` int(11) unsigned DEFAULT NULL,
+  `phone_number` varchar(20) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
+  `fax_number` varchar(20) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
+  `email` varchar(255) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
+  `municipality` varchar(255) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
   `schooltype_id` int(11) unsigned NOT NULL,
   `prefecture_id` int(11) unsigned NOT NULL,
   `educationlevel_id` int(11) unsigned NOT NULL,
   `eduadmin_id` int(11) unsigned NOT NULL,
   `created` int(11) unsigned NOT NULL,
-  `creator` varchar(255) CHARACTER SET utf8mb4 NOT NULL,
+  `creator` varchar(255) COLLATE utf8mb4_unicode_ci NOT NULL,
   PRIMARY KEY (`id`),
+  UNIQUE KEY `registry_no_UNIQUE` (`registry_no`),
   KEY `index_foreignkey_school_schooltype` (`schooltype_id`),
   KEY `index_foreignkey_school_prefecture` (`prefecture_id`),
   KEY `index_foreignkey_school_educationlevel` (`educationlevel_id`),
   KEY `index_foreignkey_school_eduadmin` (`eduadmin_id`)
-) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
+) ENGINE=InnoDB AUTO_INCREMENT=21 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 /*!40101 SET character_set_client = @saved_cs_client */;
 
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