The null value to be a partition value is very confusing.
Currently, partition column can be defined as "allow null" when create table. the null value is stored in the partition with MIN_VALUE lower bound. But if that partition is dropped, the null value can not be loaded. So I think it is not a good way to solve the problem. Is it necessary to allow null value to be a partition value? If the null partition column is not supported??how to deal with the current existing table containing null values? We have discussed it in the https://github.com/apache/incubator-doris/pull/4735 before this Xinyi Zou
