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huangzhenpc
2026-01-15 20:29:55 +08:00
commit f52498603c
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-- 013: 记录 users.allowed_groups 中的孤立 group_id
-- 任务fix-medium-data-hygiene 3.1
--
-- 目的:在删除 legacy allowed_groups 列前,记录所有引用了不存在 group 的孤立记录
-- 这些记录可用于审计或后续数据修复
-- 创建审计表存储孤立的 allowed_groups 记录
CREATE TABLE IF NOT EXISTS orphan_allowed_groups_audit (
id BIGSERIAL PRIMARY KEY,
user_id BIGINT NOT NULL,
group_id BIGINT NOT NULL,
recorded_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
UNIQUE (user_id, group_id)
);
-- 记录孤立的 group_id存在于 users.allowed_groups 但不存在于 groups 表)
INSERT INTO orphan_allowed_groups_audit (user_id, group_id)
SELECT u.id, x.group_id
FROM users u
CROSS JOIN LATERAL unnest(u.allowed_groups) AS x(group_id)
LEFT JOIN groups g ON g.id = x.group_id
WHERE u.allowed_groups IS NOT NULL
AND g.id IS NULL
ON CONFLICT (user_id, group_id) DO NOTHING;
-- 添加索引便于查询
CREATE INDEX IF NOT EXISTS idx_orphan_allowed_groups_audit_user_id
ON orphan_allowed_groups_audit(user_id);
-- 记录迁移完成信息
COMMENT ON TABLE orphan_allowed_groups_audit IS
'审计表:记录 users.allowed_groups 中引用的不存在的 group_id用于数据清理前的审计';