Dbms_redefinition package and COMPRESS attribute of the target table

Hi experts,
we have an already partitioned and compressed table under Oracle 10g R2 wich we want to move to another tablespace using online redefinition.
The table should keep the Partitions and compressed data after the move.
My question is: How much storage we must have in place for the move of the table ?
Example:
tab (compressed size) : 1000 MB
tab (uncompressed size) : 4000 MB
Seems it depends on how redefinition handles the move of the compressed data.
So if redefinition uses INSERT /* APPEND */ .... is should be roundabout 1000 MB ("compress during write")
Is this assumption correct ?
Can anybody shed some light on redefinition wich kind of compression-conserving stragetgy it uses ?
bye
BB

From the 11.2 admin guide:
Create an empty interim table (in the same schema as the table to be redefined) with all of the desired logical and physical attributes. If columns are to be dropped, do not include them in the definition of the interim table. If a column is to be added, then add the column definition to the interim table. If a column is to be modified, create it in the interim table with the properties that you want.The table being redefined remains available for queries and DML during the entire process.
Execute the FINISH_REDEF_TABLE procedure to complete the redefinition of the table. During this procedure, the original table is locked in exclusive mode for a very short time, independent of the amount of data in the original table. However, FINISH_REDEF_TABLE will wait for all pending DML to commit before completing the redefinition.>
If you did not want to create an interim table, then this approach is not going to work for you. There is no requirement for you to create anything other than the interim table, and any dependent objects can be done automatically, including materialized views. Where did you see that you have to create mview logs?

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Hi all
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Visakh
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Hi
I am using OWB 10gR2.
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~Salil

Hi
Unfortunately we have to disable automatic stat gather on the 10g database.
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Hi All,
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Dbms_redefinition package and COMPRESS attribute of the target table

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