Oracle : Ошибка ORA-22858


"invalid alteration of datatype"
*Cause: An attempt was made to modify the column type to object, REF,
nested table, VARRAY or LOB type.
*Action: Create a new column of the desired type and copy the current
column data to the new type using the appropriate type
constructor.

Попробовать перевести


Поискать эту ошибку на форуме