-- v4.0.20：推广码关联合伙人 + 渠道负责人（主合伙人多选）
-- Review 后再在生产执行。

ALTER TABLE `common_promo_code`
  ADD COLUMN `assoc_partner_account_id` BIGINT UNSIGNED NULL AFTER `owner_user_id`,
  ADD KEY `idx_common_promo_code_assoc_partner` (`assoc_partner_account_id`),
  ADD CONSTRAINT `fk_common_promo_code_assoc_partner`
    FOREIGN KEY (`assoc_partner_account_id`) REFERENCES `partner_account`(`id`) ON DELETE SET NULL;

CREATE TABLE IF NOT EXISTS `promo_code_channel_owner` (
  `promo_code_id` BIGINT UNSIGNED NOT NULL,
  `partner_account_id` BIGINT UNSIGNED NOT NULL,
  `created_at` DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3),
  PRIMARY KEY (`promo_code_id`, `partner_account_id`),
  KEY `idx_promo_channel_owner_partner` (`partner_account_id`),
  CONSTRAINT `fk_promo_channel_owner_promo` FOREIGN KEY (`promo_code_id`) REFERENCES `common_promo_code`(`id`) ON DELETE CASCADE,
  CONSTRAINT `fk_promo_channel_owner_partner` FOREIGN KEY (`partner_account_id`) REFERENCES `partner_account`(`id`) ON DELETE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='推广码渠道负责人（主合伙人）';