ALL_LOBS

ALL_LOBS displays the large objects (LOBs) contained in tables accessible to the current user. LOBs include binary large objects (BLOBs) and character large objects (CLOBs). Binary files (BFILEs) are stored outside the database, so they are not displayed by this view or the related views.

Related Views

  • DBA_LOBS describes all LOBs in the database.

  • USER_LOBS describes the LOBs owned by the current user. This view does not display the OWNER column.

Column Datatype NULL Description
OWNER VARCHAR2(30)   Owner of the object containing the LOB
TABLE_NAME VARCHAR2(30)   Name of the object containing the LOB
COLUMN_NAME VARCHAR2(4000)   Name of the LOB column or attribute
SEGMENT_NAME VARCHAR2(30)   Name of the LOB segment
TABLESPACE_NAME VARCHAR2(30)   Name of the tablespace containing the LOB segment
INDEX_NAME VARCHAR2(30)   Name of the LOB index
CHUNK NUMBER   Size (in bytes) of the LOB chunk as a unit of allocation or manipulation
PCTVERSION NUMBER   Maximum percentage of the LOB space used for versioning
RETENTION NUMBER   Maximum time duration for versioning of the LOB space
FREEPOOLS NUMBER   Number of freepools for this LOB segment
CACHE VARCHAR2(10)   Indicates whether and how the LOB data is to be cached in the buffer cache:

  • YES - LOB data is placed in the buffer cache

  • NO - LOB data either is not brought into the buffer cache or is brought into the buffer cache and placed at the least recently used end of the LRU list

  • CACHEREADS - LOB data is brought into the buffer cache only during read operations but not during write operations
LOGGING VARCHAR2(7)   Indicates whether or not changes to the LOB are logged:

  • NONE - Not specified

    See Also: the *_LOB_SUBPARTITIONS view

  • YES

  • NO
ENCRYPT VARCHAR2(4)   Indicates whether or not the LOB is encrypted.

Possible values for SecureFiles:

  • YES

  • NO

Possible value for BasicFiles:

  • NONE - Not applicable
COMPRESSION VARCHAR2(6)   Level of compression used for this LOB.

Possible values for SecureFiles:

  • LOW

  • MEDIUM

  • HIGH

  • NO - Compression is off

Possible value for BasicFiles:

  • NONE - Not applicable
DEDUPLICATION VARCHAR2(15)   Kind of deduplication used for this LOB.

Possible values for SecureFiles:

  • LOB - Deduplicate

  • NO - Keep duplicates

Possible value for BasicFiles:

  • NONE - Not applicable
IN_ROW VARCHAR2(3)   Indicates whether some of the LOBs are stored inline with the base row (YES) or not (NO). For partitioned objects, refer to the *_LOB_PARTITIONS and *_PART_LOBS views.
FORMAT VARCHAR2(15)   Indicates whether the LOB storage format is dependent on the endianness of the platform:

  • NOT APPLICABLE

  • ENDIAN SPECIFIC

  • ENDIAN NEUTRAL
PARTITIONED VARCHAR2(3)   Indicates whether the LOB column is in a partitioned table (YES) or not (NO)
SECUREFILE VARCHAR2(3)   Indicates whether the LOB is SecureFiles (YES) or not (NO)
SEGMENT_CREATED VARCHAR2(3)   Indicates whether the LOB segment has been created (YES) or not (NO)
RETENTION_TYPEFoot 1  VARCHAR2(7)   Type of retention used for this LOB.

Possible values for SecureFiles:

  • NONE

  • AUTO

  • MIN

  • MAX

  • DEFAULT

  • INVALID

Possible values for BasicFiles:

  • YES

  • NO
RETENTION_VALUEFootref 1 NUMBER   Minimum retention time (in seconds). This column is only meaningful for SecureFiles with RETENTION_TYPE set to MIN.

Footnote 1 This column is available starting with Oracle Database 11g Release 2 (11.2.0.2).