ruanwenjun commented on code in PR #15190:
URL: 
https://github.com/apache/dolphinscheduler/pull/15190#discussion_r1401608172


##########
dolphinscheduler-dao/src/main/resources/org/apache/dolphinscheduler/dao/mapper/CommandMapper.xml:
##########
@@ -43,7 +43,7 @@
     <select id="queryCommandPageBySlot" 
resultType="org.apache.dolphinscheduler.dao.entity.Command">
         select *
         from t_ds_command
-        where id % #{masterCount} = #{thisMasterSlot}
+        where unix_timestamp(update_time) % #{masterCount} = #{thisMasterSlot}

Review Comment:
   Ok, so we all agree filter the command which should be consumed at memory 
rather than using database to do this kind of work, then we can support complex 
logic to `shuffle` the command.



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