godfreyhe commented on issue #9185: [FLINK-13266] [table] Relocate blink planner classes to avoid class clashes URL: https://github.com/apache/flink/pull/9185#issuecomment-514181584 > Update: > @godfreyhe what is the purpose of `NullSerializer` and why has `ListViewTypeInfo` a `(TypeInformation<T> elementType, boolean nullSerializer)` constructor? The Flink code did not contain such special cases. this is introduced in Blink planner, and `nullSerializer` will be always false in Flink planner. in blink, `MapView` or `ListView` in `Accumulator` does not need to be serialized, like [MaxWithRetractAggFunction](https://github.com/apache/flink/blob/master/flink-table/flink-table-planner-blink/src/main/java/org/apache/flink/table/functions/aggfunctions/MaxWithRetractAggFunction.java)
---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org With regards, Apache Git Services
