ALL_LOB_SUBPARTITIONS

ALL_LOB_SUBPARTITIONS displays partition-level attributes of the LOB data subpartitions accessible to the current user.

Related Views

  • DBA_LOB_SUBPARTITIONS displays partition-level attributes of all LOB data subpartitions in the database.

  • USER_LOB_SUBPARTITIONS displays the LOB subpartitions owned by the current user. This view does not display the TABLE_OWNER column.

Column Datatype NULL Description
TABLE_OWNER VARCHAR2(30) NOT NULL Owner of the table
TABLE_NAME VARCHAR2(30) NOT NULL Name of the table
COLUMN_NAME VARCHAR2(4000)   Name of the LOB column
LOB_NAME VARCHAR2(30) NOT NULL Name of the partitioned LOB item
LOB_PARTITION_NAME VARCHAR2(30)   Name of the LOB data partition to which this LOB data subpartition belongs
SUBPARTITION_NAME VARCHAR2(30)   Name of the table subpartition to which this LOB subpartition corresponds
LOB_SUBPARTITION_NAME VARCHAR2(30)   Name of the LOB subpartition
LOB_INDSUBPART_NAME VARCHAR2(30)   Name of the corresponding LOB index subpartition
SUBPARTITION_POSITION NUMBER   Position of the LOB data partition within the LOB item
CHUNK NUMBER   Value of the CHUNK attribute of the LOB data partition
PCTVERSION NUMBER NOT NULL Value of the PCTVERSION attribute of the LOB data partition
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
IN_ROW VARCHAR2(3)   Indicates whether the STORAGE IN ROW attribute of the LOB data partition is enabled (YES) or not (NO)
TABLESPACE_NAME VARCHAR2(30) NOT NULL Name of the tablespace containing the LOB data partition
INITIAL_EXTENT NUMBER   Size in bytes of the initial extent for the LOB data partition
NEXT_EXTENT NUMBER   Size in bytes of secondary extents for the LOB data partition
MIN_EXTENTS NUMBER NOT NULL Minimum number of extents allowed in the segment of the LOB data partition
MAX_EXTENTS NUMBER NOT NULL Maximum number of extents allowed in the segment of the LOB data partition
MAX_SIZE NUMBER   Maximum number of blocks allowed in the segment of the LOB data partition
RETENTION VARCHAR2(7)   Retention option.

Possible values for a SecureFiles segment:

  • NONE

  • AUTO

  • MIN

  • MAX

  • DEFAULT

  • INVALID

Possible values for a BasicFiles segment:Foot 1 

  • YES

  • NO
MINRETENTION NUMBER   Minimum retention duration for a SecureFiles segment
PCT_INCREASE NUMBER   Percentage increase in extent size for the LOB data partition
FREELISTS NUMBER   Number of process freelists allocated in the segment of the LOB data partition
FREELIST_GROUPS NUMBER   Number of freelist groups allocated in the segment of the LOB data partition
LOGGING VARCHAR2(3)   Indicates whether or not changes to the LOB are logged:

  • YES

  • NO
BUFFER_POOL VARCHAR2(7)   Buffer pool to be used for the LOB data partition blocks:

  • DEFAULT

  • KEEP

  • RECYCLE

  • NULL
FLASH_CACHE VARCHAR2(7)   Database Smart Flash Cache hint to be used for subpartition blocks:

  • DEFAULT

  • KEEP

  • NONE

Solaris and Oracle Linux functionality only.
CELL_FLASH_CACHE VARCHAR2(7)   Cell flash cache hint to be used for subpartition blocks:

  • DEFAULT

  • KEEP

  • NONE

See Also: Oracle Exadata Storage Server Software documentation for more information
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
SECUREFILE VARCHAR2(3)   Indicates whether the LOB is SecureFiles (YES) or not (NO)
SEGMENT_CREATED VARCHAR2(3)   Indicates whether the LOB subpartition segment has been created (YES) or not (NO); N/A indicates that this LOB is not subpartitioned

Footnote 1 The values listed for a BasicFiles segment are supported starting with Oracle Database 11g Release 2 (11.2.0.2). In previous releases, the value for this column for a BasicFiles segment is NULL.