Logical database structure created by the database administrator to temporarily store undo information. Rollback segments store old data changed by SQL statements in a transaction until it is committed. See Also: commit, logical structures, segment
a collection of extents that holds rollback data for rollback transactions, read-consistency, and database recovery
a database object that stores a transaction's changes before they are committed
a disk storage area containing information that Oracle uses to identify and undo transactions which were active at the time of a failure
a lot like a database table itself
an object that Oracle uses to store data necessary to reverse, or undo, changes made by transactions
a portion of the database that records data before it is modified by transactions, allowing the changes to be rolled back (undone) under certain circumstances
The place in the database where undo information is kept and can be obtained if a rollback is needed.
A portion of the database that records actions that should be undone under certain circumstances. Rollback segments are used to provide transaction rollback, read consistency, and recovery.
A portion of the database that records the actions of transactions if the transaction should be rolled back (undone). Rollback segments are used to provide read consistency, to rollback transactions, and to recover the database.