Hi lec ssmi, > If the type value of a record is updated in the database, the values before and after the update will be divided into different partitions and handed over to different operators for calculation. I think your understanding is correct.
> Can Retraction happen correctly? I didn't get your point, can you elaborate your question a little bit? lec ssmi <shicheng31...@gmail.com> 于2020年7月1日周三 上午9:54写道： > Hi: > When we use sql for aggregation operation, for example, the following sql > >> select count( distinct name) cnt, type from table group by type > > > Source data can be regarded as bin log data. > If the type value of a record is updated in the database, the values > before and after the update will be divided into different partitions and > handed over to different operators for calculation. Can Retraction happen > correctly? > -- Best, Benchao Li
