ORA-01562

Error: ORA-01562: failed to extend rollback segment number string

Causa: Failure occurred when trying to extend rollback segment.

Acción: This is normally followed by another error message that caused the failure. You may take the rollback segment offline to perform maintenance. Use SELECT SEGMENT_NAME FROM DBA_ROLLBACK_SEGS WHERE SEGMENT_ID=string (where string is the segment number from the message) to determine the rollback segment name. Then use the ALTER ROLLBACK SEGMENT OFFLINE command to take the rollback segment offline.