OERR: ORA-39726 unsupported add/drop column operation on compressed tables

Error:  ORA-39726  (ORA-39726)Text:  unsupported add/drop column operation on compressed tables ---------------------------------------------------------------------------Cause:An unsupported add/drop column operation for compressed table was attemped. Action:When adding a column, do not specify a default value. DROP column is only supported in the form of SET UNUSED column (meta-data drop column).

错误：ora-39726（ora-39726）
正文：不支持添加/删除列操作压缩表
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原因：不支持添加/删除列操作压缩表
尝试。
行动：添加列时，不指定默认值。删除列
仅支持的形式设置未使用的列（元数据滴
列）。