Update database schema: Make id columns unsigned

This commit updates the database schema and adds a new migration to
modify the signed integer columns to make them unsigned.

3 files changed, 20 insertions, 7 deletions

diff --git a/core/db/database.sql b/core/db/database.sql
index d1eb8e7..244a38b 100644
--- a/core/db/database.sql
+++ b/core/db/database.sql
@@ -3,16 +3,16 @@
 -- =============================================================================
 CREATE TABLE `migration` (`schema_version` smallint(4) NOT NULL)
 	ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
-INSERT INTO `migration` (`schema_version`) VALUES (4);
+INSERT INTO `migration` (`schema_version`) VALUES (5);
 
 -- =============================================================================
 -- Table structure for page entities
 -- =============================================================================
 CREATE TABLE `page` (
-	`id` smallint(6) NOT NULL AUTO_INCREMENT,
+	`id` smallint(5) UNSIGNED NOT NULL AUTO_INCREMENT,
 	`time_insert` datetime NOT NULL,
 	`time_update` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
-	`user` tinyint(4) NOT NULL,
+	`user` tinyint(3) UNSIGNED NOT NULL,
 	`slug` varchar(100) CHARACTER SET utf8mb4 COLLATE utf8mb4_bin NOT NULL,
 	`name` varchar(100) NOT NULL,
 	`body` text NOT NULL,
@@ -28,10 +28,10 @@ CREATE TABLE `page` (
 -- Table structure for post entities
 -- =============================================================================
 CREATE TABLE `post` (
-	`id` smallint(6) NOT NULL AUTO_INCREMENT,
+	`id` smallint(5) UNSIGNED NOT NULL AUTO_INCREMENT,
 	`time_insert` datetime NOT NULL,
 	`time_update` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
-	`user` tinyint(4) NOT NULL,
+	`user` tinyint(3) UNSIGNED NOT NULL,
 	`slug` varchar(100) CHARACTER SET utf8mb4 COLLATE utf8mb4_bin NOT NULL,
 	`name` varchar(100) NOT NULL,
 	`body` text NOT NULL,
@@ -47,7 +47,7 @@ CREATE TABLE `post` (
 -- Table structure for user entities
 -- =============================================================================
 CREATE TABLE `user` (
-	`id` tinyint(4) NOT NULL AUTO_INCREMENT,
+	`id` tinyint(3) UNSIGNED NOT NULL AUTO_INCREMENT,
 	`time_insert` datetime NOT NULL,
 	`time_update` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
 	`slug` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_bin NOT NULL,
diff --git a/core/db/migrations/5.sql b/core/db/migrations/5.sql
new file mode 100644
index 0000000..8e8ecd7
--- /dev/null
+++ b/core/db/migrations/5.sql
@@ -0,0 +1,13 @@
+ALTER TABLE `page` DROP FOREIGN KEY `page_user`;
+ALTER TABLE `post` DROP FOREIGN KEY `post_user`;
+
+ALTER TABLE `page` MODIFY `id` SMALLINT UNSIGNED NOT NULL AUTO_INCREMENT,
+	MODIFY `user` TINYINT UNSIGNED NOT NULL;
+ALTER TABLE `post` MODIFY `id` SMALLINT UNSIGNED NOT NULL AUTO_INCREMENT,
+	MODIFY `user` TINYINT UNSIGNED NOT NULL;
+ALTER TABLE `user` MODIFY `id` TINYINT UNSIGNED NOT NULL AUTO_INCREMENT;
+
+ALTER TABLE `page` ADD CONSTRAINT `page_user` FOREIGN KEY (`user`)
+	REFERENCES `user` (`id`) ON DELETE CASCADE ON UPDATE CASCADE;
+ALTER TABLE `post` ADD CONSTRAINT `post_user` FOREIGN KEY (`user`)
+	REFERENCES `user` (`id`) ON DELETE CASCADE ON UPDATE CASCADE;
diff --git a/core/namespace/Migrator.php b/core/namespace/Migrator.php
index 3096862..1a05cc1 100644
--- a/core/namespace/Migrator.php
+++ b/core/namespace/Migrator.php
@@ -5,7 +5,7 @@ class Migrator {
 	private $directory;
 	private $migrations = [];
 
-	const CURRENT_SCHEMA_VERSION = 4;
+	const CURRENT_SCHEMA_VERSION = 5;
 
 	#===============================================================================
 	# Fetch on-disk schema version from migration table