|Oracle® Database Reference
11g Release 2 (11.2)
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DB_SECUREFILE specifies whether or not to treat LOB files as SecureFiles.
Any LOBs that are specified as SecureFiles are created as BasicFile LOBs. All SecureFile-specific storage options and features (for example, compress, encrypt, deduplicate) will cause an exception. The BasicFile LOB defaults will be used for storage options not specified.
LOBs are allowed to be created as SecureFiles.
Attempts to create all LOBs as SecureFile LOBs but creates any LOBs not in an Automatic Segment Space Managed tablespace as BasicFile LOBs, unless
SECUREFILE is explicitly specified. Any BasicFile LOB storage options that are specified will be ignored and the SecureFile defaults will be used for all storage options not specified.
SECUREFILE keyword and all SecureFile options are ignored.
COMPATIBLE initialization parameter is not set to
11.1.0 or higher, then LOBs are not treated as SecureFiles.
If there is a LOB column with two partitions (one that has a tablespace for which ASSM is enabled and one that has a tablespace for which ASSM is not enabled), then LOBs in the partition with the ASSM-enabled tablespace will be treated as SecureFiles and LOBs in the other partition will be treated as BasicFile LOBs.