-- =============================================================
-- 角色表补齐列：yz_system_admin_role
-- 变更（历史库早于「租户隔离 / 自定义角色」特性建表时需要）：
--   tenant_id  bigint unsigned NOT NULL DEFAULT 0   租户ID 0-平台/全局 >0-具体租户
--   is_custom  tinyint unsigned NOT NULL DEFAULT 0  自定义角色 0-系统/平台预置 1-租户自建
-- 本脚本可重复执行：列不存在时才执行 ALTER，已存在自动跳过（不再报 1060 Duplicate column）。
-- 运行：mysql -h<host> -P<port> -u<user> -p <db> < alter_system_admin_role_columns.sql
-- =============================================================

-- tenant_id：租户ID
SET @tbl := (SELECT COUNT(*) FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME = 'yz_system_admin_role');
SET @col := (SELECT COUNT(*) FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME = 'yz_system_admin_role' AND COLUMN_NAME = 'tenant_id');
SET @ddl := IF(@tbl > 0 AND @col = 0, 'ALTER TABLE `yz_system_admin_role` ADD COLUMN `tenant_id` bigint unsigned NOT NULL DEFAULT 0 COMMENT ''租户ID 0-平台/全局 >0-具体租户''', 'DO 0');
PREPARE stmt FROM @ddl; EXECUTE stmt; DEALLOCATE PREPARE stmt;

-- is_custom：是否租户自建角色
SET @tbl := (SELECT COUNT(*) FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME = 'yz_system_admin_role');
SET @col := (SELECT COUNT(*) FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME = 'yz_system_admin_role' AND COLUMN_NAME = 'is_custom');
SET @ddl := IF(@tbl > 0 AND @col = 0, 'ALTER TABLE `yz_system_admin_role` ADD COLUMN `is_custom` tinyint unsigned NOT NULL DEFAULT 0 COMMENT ''自定义角色 0-系统/平台预置 1-租户自建''', 'DO 0');
PREPARE stmt FROM @ddl; EXECUTE stmt; DEALLOCATE PREPARE stmt;