diff --git a/src/main/resources/mapper/CaseExchangeMapper.xml b/src/main/resources/mapper/CaseExchangeMapper.xml
index 5361c86..b1874fc 100644
--- a/src/main/resources/mapper/CaseExchangeMapper.xml
+++ b/src/main/resources/mapper/CaseExchangeMapper.xml
@@ -55,6 +55,7 @@
         ) AS result
         JOIN case_exchange a ON result.exchange_id = a.exchange_id
         LEFT JOIN user c ON c.user_id = a.user_id
+        LEFT JOIN user_comment_exchange d ON d.exchange_id = a.exchange_id
         <if test="order != null and !order.isEmpty()">
             ORDER BY
             <foreach item="entry" index="key" collection="order" separator=",">