ORA-40847：Redefining to contentColumn.sqlType BLOB with jsonFormat OSON is not allowed if the original collection has user-defined constraints.
错误码
错误描述：Redefining to contentColumn.sqlType BLOB with jsonFormat OSON is not allowed if the original collection has user-defined constraints.
错误原因：An invalid request was made to redefine a collection with user-defined constraints to contentColumn.sqlType BLOB with jsonFormat OSON.
解决方法：Ensure that the requested redefinition can be supported.
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