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junhong_cmp_fiber/migrations/000270_widen_exchange_reason.down.sql
邹进 b3f66a01a8 chore: 补充换货原因长度放宽迁移 000270
生产库与测试库已手动执行,迁移重复执行结果不变;回滚不缩短长度,避免截断已有数据。

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-11-03 11:15:39 +09:00

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-- 回滚 000270:不缩回 varchar(100)。
-- 放宽后可能已写入超过 100 字的换货原因,缩短长度会失败或需要截断历史数据;需要时由维护者评估后手工处理。
SELECT 1;