我们看以下测试：
[oracle@danaly oradata]$ sqlplus "/ as sysdba"
SQL*Plus: Release 10.2.0.1.0 - Production on Thu Jul 12 15:14:21 2007
Copyright (c) 1982, 2005, Oracle. All rights reserved.
Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production
With the Partitioning, Oracle Label Security, OLAP and Data Mining Scoring Engine options
SQL> alter database mount;
Database altered.
SQL> alter database open;
Database altered.
SQL> select name from v$datafile;
NAME
--------------------------------------------------------------------------------
/opt/oracle/oradata/eygle/EYGLE/datafile/o1_mf_system_37tc1xns_.dbf
/opt/oracle/oradata/eygle/EYGLE/datafile/o1_mf_undotbs1_37tc29mb_.dbf
/opt/oracle/oradata/eygle/EYGLE/datafile/o1_mf_sysaux_37tc2gqc_.dbf
/opt/oracle/oradata/eygle/EYGLE/datafile/o1_mf_users_37tc2tth_.dbf
SQL> show parameter comp
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
compatible string 10.2.0.1.0
nls_comp string
plsql_compiler_flags string INTERPRETED, NON_DEBUG
plsql_v2_compatibility boolean FALSE
SQL> create tablespace trans
2 datafile '/opt/oracle/oradata/eygle/EYGLE/datafile/trans.dbf' size 10M;
Tablespace created.
SQL> create user trans identified by trans default tablespace trans;
User created.
SQL> grant connect,resource to trans;
Grant succeeded.
SQL> connect trans/trans
create table test as select * from dict;
Connected.
SQL>
Table created.
SQL> select count(*) from test;
COUNT(*)
----------
615
SQL> connect / as sysdba
Connected.
SQL> alter tablespace trans read only;
Tablespace altered.
SQL> exit
Disconnected from Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production
With the Partitioning, Oracle Label Security, OLAP and Data Mining Scoring Engine options
[oracle@danaly oradata]$ exp \'/ as sysdba\' tablespaces=trans transport_tablespace=y file=exp_trans.dmp
Export: Release 10.2.0.1.0 - Production on Thu Jul 12 15:28:24 2007
Copyright (c) 1982, 2005, Oracle. All rights reserved.
Connected to: Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production
With the Partitioning, Oracle Label Security, OLAP and Data Mining Scoring Engine options
Export done in ZHS16GBK character set and AL16UTF16 NCHAR character set
Note: table data (rows) will not be exported
About to export transportable tablespace metadata...
For tablespace TRANS ...
. exporting cluster definitions
. exporting table definitions
. . exporting table TEST
. exporting referential integrity constraints
. exporting triggers
. end transportable tablespace metadata export
Export terminated successfully without warnings.
[oracle@danaly oradata]$ ls -l exp_trans.dmp
-rw-r--r-- 1 oracle dba 16384 Jul 12 15:28 exp_trans.dmp
[oracle@danaly oradata]$ pwd
/opt/oracle/oradata