window????????????
1??watermark???? >= window_end_time 
2????[window_start_time,window_end_time)????????????


------------------ ???????? ------------------
??????:                                                                         
                                               "user-zh"                        
                                                            
<[email protected]&gt;;
????????:&nbsp;2021??5??8??(??????) ????3:16
??????:&nbsp;"user-zh"<[email protected]&gt;;

????:&nbsp;Re:??????????watermark??window


















????????????????????????????????????????????????periodic watermark
??????????????????????????????????????????

?? 2021-05-08 15:09:06??"Anlen" <[email protected]&gt; ??????
&gt;????????????????window ????????????????????????????
&gt;
&gt;
&gt;
&gt;---????????---
&gt;??????: "????"<[email protected]&amp;gt;
&gt;????????: 2021??5??8??(????) ????2:10
&gt;??????: "user-zh"<[email protected]&amp;gt;;
&gt;????: ????watermark??window
&gt;
&gt;
&gt;????????
&gt;??????????????????????????????????window??periodic watermark????????
&gt;????????window??????????????????????3????????????????????(6??5??3??1??2??4)??
&gt;????watermark??????????????????????????????????window????????3??1??2??(6??5??4)??
&gt;????watermark????????????????7????????????????????????????.
&gt;????????????????????????????????????????????????????????????????

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