modify 30conflict

odbctest/mql/basic/30conflict/26mupdate.mql

@@ -7,7 +7,7 @@ params("xxx", 5, 1622249715000, 1, "设备:222.129.134.178电源整体功能恢
 **/
 ;
 
-select * from /test/malert_status
+select * from /test/malert_status limit -1
 /**
 output()
 count(10001)