43 lines
1.2 KiB
SQL
43 lines
1.2 KiB
SQL
-- 展位重构迁移：从 6 槽位缩减为 2 槽位
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-- 执行时间：2026-05-20
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-- 执行人：待填写
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-- 风险等级：高（删除数据）
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-- ========== 备份（建议执行前手动备份）==========
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-- 备份 booth_slots 表
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-- CREATE TABLE booth_slots_backup_20260520 AS SELECT * FROM booth_slots;
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-- 备份 exhibitions 表
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-- CREATE TABLE exhibitions_backup_20260520 AS SELECT * FROM exhibitions;
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-- ========== 迁移开始 ==========
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-- 1. 先删除 slot_index > 2 的展览记录（引用完整性）
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DELETE FROM exhibitions
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WHERE slot_id IN (
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SELECT slot_id FROM booth_slots
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WHERE slot_index > 2
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);
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-- 2. 删除 slot_index > 2 的槽位记录
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DELETE FROM booth_slots
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WHERE slot_index > 2;
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-- 3. 验证清理结果
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SELECT user_id, star_id, COUNT(*) as slot_count
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FROM booth_slots
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GROUP BY user_id, star_id
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HAVING COUNT(*) > 2;
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-- 应该返回空结果，表示每个用户的每个明星展馆最多只有 2 个槽位
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-- 4. 验证 exhibitions 没有残留（检查是否有关联到已删除槽位的展览）
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SELECT COUNT(*) as orphaned_exhibitions
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FROM exhibitions e
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WHERE NOT EXISTS (
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SELECT 1 FROM booth_slots bs WHERE bs.slot_id = e.slot_id
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);
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-- 应该返回 0
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-- ========== 迁移完成 ========== |