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Is an index unusable during a rebuild or move?

Is an Oracle8i index unusable during a rebuild or an index move (non IOT)? I need availability 24x7 and would like to be able to access a table via an index that is being rebuilt.

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While the index is being moved, it is unusable. You can specify the ONLINE option to make the index available during the move, ie.

ALTER INDEX my_index REBUILD new_tablespace ONLINE;

This was first published in March 2004

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