8.181 V$ROLLNAME

V$ROLLNAME lists the names of all online rollback segments. It can only be accessed when the database is open.

Column Datatype NULL Description

USN

NUMBER

Rollback (undo) segment number

NAME

VARCHAR2(30)

NOT NULL

Rollback segment name

CON_ID

NUMBER

The ID of the container to which the data pertains. Possible values include:

  • 0: This value is used for rows containing data that pertain to the entire CDB. This value is also used for rows in non-CDBs.

  • 1: This value is used for rows containing data that pertain to only the root

  • n: Where n is the applicable container ID for the rows containing data