How do you create a table with a column of xmltype? This option is not available in the alter table or create table wizard when trying to add a column.
This is not support in Toad. Toad has limited xmltype support because of Unicode support.
Toad had made changes for general unicode support but this also brings up OCI's conflicts with XMLTYPE.
You may be able to create the table or alter to add this column by running the script, but storage issues may come up.