Oracle : Ошибка ORA-14284


"one or more of table's subpartitions reside in a read-only tablespace"
*Cause: User issued ALTER TABLE statement attempting to modify
an existing VARCHAR2 (or VARCHAR) column to be of type CHAR
(or CHARACTER), increase length of an existing CHAR (or
CHARACTER) column, or add a column with user-specified default for
a table one or more subpartitions of which reside in read-only
tablespaces, which is illegal
*Action: Avoid performing aformentioned operations on a partitioned
table one or more subpartitions of which reside in read-only
tablespaces

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