Oracle in a Nutshell

Name

LOB_Parameter_Clause

Synopsis

[TABLESPACE tablespace_name]
[{ENABLE | DISABLE} STORAGE IN ROW]
[Storage_Clause]
[CHUNK integer]
[RETENTION]
[FREEPOOLS integer]
[PCTVERSION integer ]
[CACHE READS | NOCACHE [LOGGING | NOLOGGING]]

Specifies storage parameters to be applied to large object (LOB) data segments.

TABLESPACE

Specifies the name of the tablespace in which the LOB will be stored.

ENABLE STORAGE IN ROW

Specifies that the LOB data may be stored in the data row if its size is less than approximately 4000 bytes. This option is the default behavior.

DISABLE STORAGE IN ROW

Specifies that the LOB data is always stored outside the data row.

STORAGE

Specifies the storage parameters for the LOB segment. See the “Storage_Clause” entry later in this section for details.

CHUNK

Specifies that integer bytes should be allocated for LOB manipulation. Note that integer will be rounded up to a multiple of the Oracle block size.

PCTVERSION

Specifies the maximum percentage of LOB storage space to be used for creating new versions of the LOB. The default is 10%.

CACHE READS

Specifies that LOB data will be retained in memory for faster access.

NOCACHE

Specifies that LOB data will not be retained in memory. This option is the default behavior.