oracle bfile

11g
External LOBs A BFILE(binary file LOB) is an external LOB because the database
stores a pointer to a file in the operating system. The external data is read-only.
A BFILEuses a directory object to locate data. The amount of space consumed
depends on the length of the directory object name and the length of the file name.
A BFILEdoes not use the same read consistency mechanism as internal LOBS because
the binary file is external to the database. If the data in the file changes, then repeated reads from the same binary file may produce different results.

10g
用户可以使用 BFILE 数据类型在数据库外的操作系统文件中存储二进制数据。
数据类型为 BFILE 的列或属性中存储的为文件定位器[file locator]，其指向
包含实际数据的外部文件。BFILE 数据类型最大可存储 8 TB 数据。

BFILE 数据是只读的，用户不能对其修改。BFILE 数据只支持随机读取（不支
持顺序读取），且不支持事务控制。底层操作系统必须负责确保 BFILE 文件的
完整性，安全性，及持久性[durability]。数据库管理员应确保所有 BFILE 文
件存在，且 Oracle 进程具有读取 BFILE 文件的操作系统权限。



from metalink:
<wbr><br><br> ORA-01652 Temporary Segment<wbr><wbr><wbr><wbr><wbr><wbr><wbr> ===========================<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><br><wbr>SELECT<wbr> next_extent, pct_increase, tablespace_name<wbr><wbr><wbr><wbr><wbr><wbr><wbr> FROM<wbr><wbr><wbr> dba_tablespaces<wbr><wbr><wbr><wbr><wbr><wbr><wbr> WHERE<wbr><wbr> tablespace_name = '';<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><br><wbr>Temporary<wbr> segments take the default storage clause of the tablespace<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> in which they are created.<wbr><wbr><wbr><wbr><wbr><wbr><br><br> If this error is caused by a query, then try and ensure that the query<wbr><wbr><wbr><wbr><wbr><wbr><wbr> is tuned to perform its sorts as efficiently as possible.<wbr><wbr><wbr><wbr><wbr><br><wbr><br><wbr> To find the owner of a sort, please refer to [NOTE:1069041.6] </wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>