表最大字段数统计有问题，删除表字段后也参与统计 about blog HOT 2 CLOSED

https://www.postgresql.org/docs/13/limits.html
Columns that have been dropped from the table also contribute to the maximum column limit. Moreover, although the dropped column values for newly created tuples are internally marked as null in the tuple's null bitmap, the null bitmap also occupies space.
修复这个问题也并不简单,因为还牵涉到pk, fk等逻辑或物理关联的问题, 关联信息都是要与att系统表进行映射的.

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映射没问题啊，我的意思是删除的字段可以仍然存在pg_attribute里，但是不要参与表字段数统计不行吗

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