Can I use dbms_redefinition with bulk data transformations for better results?
John,
normally it does not make sense to use dbms_redefinition in your case since you are not redefining a table. You are creating an extra schema. dbms_redefinition is meant for situations where for example your table T1 gets an other layout and this has to be done online. Application can stil use the old form of the table while you are completing the new table. This is done by creating materialized view logs.

I hope this helps.