DBA Data[Home] [Help] [Dependency Information]

VIEW: SYS.CDB_UNDO_EXTENTS

Object Details
Object Name: CDB_UNDO_EXTENTS
Object Type: VIEW
Owner: SYS
Subobject Name:
Status: VALID

Extents comprising all segments in the system managed undo tablespaces in all containers

[View Source]

Columns
Name Datatype Length Mandatory Comments
OWNER CHAR (3)
Owner of the segment associated with the extent
SEGMENT_NAME VARCHAR2 (30) Yes Name of the segment associated with the extent
TABLESPACE_NAME VARCHAR2 (30) Yes Name of the tablespace containing the extent
EXTENT_ID NUMBER

Extent number in the segment
FILE_ID NUMBER
Yes Name of the file containing the extent
BLOCK_ID NUMBER

Starting block number of the extent
BYTES NUMBER

Size of the extent in bytes
BLOCKS NUMBER

Size of the extent in ORACLE blocks
RELATIVE_FNO NUMBER

Relative number of the file containing the segment header
COMMIT_JTIME NUMBER

Commit Time of the undo in the extent expressed as Julian date
COMMIT_WTIME VARCHAR2 (20)
Commit Time of the undo in the extent expressed as wall clock time
STATUS VARCHAR2 (9)
Transaction Status of the undo in the extent
CON_ID NUMBER

container id
Query Text

Cut, paste (and edit) the following text to query this object:


SELECT OWNER
,      SEGMENT_NAME
,      TABLESPACE_NAME
,      EXTENT_ID
,      FILE_ID
,      BLOCK_ID
,      BYTES
,      BLOCKS
,      RELATIVE_FNO
,      COMMIT_JTIME
,      COMMIT_WTIME
,      STATUS
,      CON_ID
FROM SYS.CDB_UNDO_EXTENTS;

Dependencies

[top of page]

SYS.CDB_UNDO_EXTENTS does not reference any database object

SYS.CDB_UNDO_EXTENTS is referenced by following:

SchemaPUBLIC
SynonymCDB_UNDO_EXTENTS