ORA-39278：Cannot alter table with segments to segment creation deferred.
错误码
错误描述：Cannot alter table with segments to segment creation deferred.
错误原因：DBMS_METADATA_DIFF was comparing two tables, the first with allocated segments, the second with deferred segments. There is no SQL ALTER statement to change a table which already has segments to segment creation deferred.
解决方法：The difference cannot be eliminated with an SQL ALTER statement.
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