Initial

migrations/mysql/02116_user_algo.sql

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+-- migrate:up
+-- 添加 algo 列（如果不存在）
+SET @dbname = DATABASE();
+SET @tablename = 'user';
+SET @colname = 'algo';
+SET @sql = (
+    SELECT IF(
+        COUNT(*) = 0,
+        'ALTER TABLE `user` ADD COLUMN `algo` VARCHAR(20) NOT NULL DEFAULT ''default'' COMMENT ''Encryption Algorithm'' AFTER `password`;',
+        'SELECT "Column `algo` already exists";'
+    )
+    FROM information_schema.COLUMNS
+    WHERE TABLE_SCHEMA = @dbname
+      AND TABLE_NAME = @tablename
+      AND COLUMN_NAME = @colname
+);
+PREPARE stmt FROM @sql;
+EXECUTE stmt;
+DEALLOCATE PREPARE stmt;
+
+-- 添加 salt 列（如果不存在）
+SET @colname = 'salt';
+SET @sql = (
+    SELECT IF(
+        COUNT(*) = 0,
+        'ALTER TABLE `user` ADD COLUMN `salt` VARCHAR(20) NOT NULL DEFAULT ''default'' COMMENT ''Password Salt'' AFTER `algo`;',
+        'SELECT "Column `salt` already exists";'
+    )
+    FROM information_schema.COLUMNS
+    WHERE TABLE_SCHEMA = @dbname
+      AND TABLE_NAME = @tablename
+      AND COLUMN_NAME = @colname
+);
+PREPARE stmt FROM @sql;
+EXECUTE stmt;
+DEALLOCATE PREPARE stmt;
+
+-- migrate:down
+ALTER TABLE `user`
+DROP COLUMN `algo`,
+    DROP COLUMN `salt`;
+