-- 修复历史数据：对每个店铺取 created_at 最早的代理账号（user_type = 3）设为主账号（is_primary = true）
-- 背景：shop/service.go 创建初始账号时未设置 is_primary = true，导致 fund-summary 接口查不到主账号信息
-- 策略：DISTINCT ON (shop_id) 按 created_at ASC 取最早账号；AND is_primary = false 避免覆盖已正确的数据
UPDATE tb_account a
SET is_primary = true
FROM (
    SELECT DISTINCT ON (shop_id) id
    FROM tb_account
    WHERE shop_id IS NOT NULL
      AND user_type = 3
      AND deleted_at IS NULL
    ORDER BY shop_id, created_at ASC
) earliest
WHERE a.id = earliest.id
  AND a.is_primary = false;