1

help/base_sys_user_role去重.sql

@@ -1,5 +1,6 @@
 -- base_sys_user_role 角色授权去重
--- 保留每组 userId + roleId 中 id 最小的一条，删除其余重复记录
+-- 只处理未软删除的有效授权；软删除历史记录不参与去重和唯一约束
+-- 保留每组有效 userId + roleId 中 id 最小的一条，删除其余重复记录
 
 -- 1. 执行前查看重复数据
 SELECT
@@ -9,6 +10,7 @@ SELECT
   MIN(id) AS keep_id,
   ARRAY_AGG(id ORDER BY id) AS ids
 FROM base_sys_user_role
+WHERE deleted_at IS NULL
 GROUP BY "userId", "roleId"
 HAVING COUNT(*) > 1
 ORDER BY cnt DESC, "userId", "roleId";
@@ -18,6 +20,8 @@ DELETE FROM base_sys_user_role a
 USING base_sys_user_role b
 WHERE a."userId" = b."userId"
   AND a."roleId" = b."roleId"
+  AND a.deleted_at IS NULL
+  AND b.deleted_at IS NULL
   AND a.id > b.id;
 
 -- 3. 执行后复查，应返回 0 行
@@ -26,5 +30,16 @@ SELECT
   "roleId",
   COUNT(*) AS cnt
 FROM base_sys_user_role
+WHERE deleted_at IS NULL
 GROUP BY "userId", "roleId"
 HAVING COUNT(*) > 1;
+
+-- 4. 建议约束：只限制未软删除授权唯一，允许历史软删除授权保留
+ALTER TABLE base_sys_user_role
+DROP CONSTRAINT IF EXISTS uk_base_sys_user_role_user_role;
+
+DROP INDEX IF EXISTS uk_base_sys_user_role_user_role;
+
+CREATE UNIQUE INDEX IF NOT EXISTS uk_base_sys_user_role_user_role
+ON base_sys_user_role ("userId", "roleId")
+WHERE deleted_at IS NULL;