-- ============================================================
-- cc_carousel 补 status 列（幂等）
-- 新后台 CRUD / 启停开关依赖此列；老表从未有 status
-- ============================================================

SET @db := DATABASE();
SET @exists := (
    SELECT COUNT(*) FROM information_schema.COLUMNS
    WHERE TABLE_SCHEMA = @db AND TABLE_NAME = 'cc_carousel' AND COLUMN_NAME = 'status'
);
SET @sql := IF(@exists = 0,
    'ALTER TABLE `cc_carousel` ADD COLUMN `status` tinyint(1) NOT NULL DEFAULT 0 COMMENT ''状态 0显示 1隐藏'' AFTER `sort`',
    'SELECT ''skip cc_carousel.status'' AS msg'
);
PREPARE stmt FROM @sql; EXECUTE stmt; DEALLOCATE PREPARE stmt;