暂存一下,防止丢失

migrations/000177_add_agent_wallet_refund_unique.up.sql

@@ -0,0 +1,27 @@
+DO $$
+BEGIN
+    IF EXISTS (
+        SELECT 1
+          FROM tb_agent_wallet_transaction
+         WHERE reference_type = 'refund'
+           AND transaction_type = 'refund'
+           AND status = 1
+           AND reference_id IS NOT NULL
+         GROUP BY reference_type, reference_id, transaction_type
+        HAVING COUNT(*) > 1
+    ) THEN
+        RAISE EXCEPTION '存在重复的代理主钱包成功退款流水，禁止创建唯一索引';
+    END IF;
+END
+$$;
+
+COMMENT ON COLUMN tb_agent_wallet_transaction.transaction_type IS '交易类型：recharge-充值 adjustment-人工调整 deduct-扣款 refund-退款 commission-分佣 withdrawal-提现';
+COMMENT ON COLUMN tb_agent_wallet_transaction.reference_type IS '关联业务类型：order commission withdrawal topup refund exchange manual_adjustment';
+
+CREATE UNIQUE INDEX uq_agent_wallet_refund_reference
+    ON tb_agent_wallet_transaction (reference_type, reference_id, transaction_type)
+    WHERE reference_type = 'refund'
+      AND transaction_type = 'refund'
+      AND status = 1;
+
+COMMENT ON INDEX uq_agent_wallet_refund_reference IS '保证每张退款单最多存在一条代理主钱包成功退款流水，软删除不能绕过资金幂等';