diff --git a/src/main/resources/egovframework/sqlmap/let/msg/MjonMsgResv_SQL_mysql.xml b/src/main/resources/egovframework/sqlmap/let/msg/MjonMsgResv_SQL_mysql.xml
index 22fd4097..023cc198 100644
--- a/src/main/resources/egovframework/sqlmap/let/msg/MjonMsgResv_SQL_mysql.xml
+++ b/src/main/resources/egovframework/sqlmap/let/msg/MjonMsgResv_SQL_mysql.xml
@@ -888,6 +888,16 @@
 				THEN DATE_ADD(REQUEST_TIME, INTERVAL -30 MINUTE)
 				ELSE DATE_ADD(REQUEST_TIME, INTERVAL -(TIMESTAMPDIFF(MINUTE, NOW(), REQUEST_TIME)) MINUTE)
 			END
+			]]> ,
+			SEND_TIME = 
+			<![CDATA[
+			CASE 
+				WHEN TIMESTAMPDIFF(MINUTE, NOW(), SEND_TIME) < 0
+				THEN SEND_TIME
+				WHEN TIMESTAMPDIFF(MINUTE, NOW(), SEND_TIME) >= 30 
+				THEN DATE_ADD(SEND_TIME, INTERVAL -30 MINUTE)
+				ELSE DATE_ADD(SEND_TIME, INTERVAL -(TIMESTAMPDIFF(MINUTE, NOW(), SEND_TIME)) MINUTE)
+			END
 			]]>
 		WHERE 1=1 
 		<iterate prepend="AND USER_KEY IN" open="(" close=")" conjunction="," property="userDataList">