因为项目需要从9i 导数据到18C，所以发现如下特性

1.18C imp 导入数据，如果表空间在目标库没有，会将表导入到用户默认表空间
2.18C imp 导入数据，如果表空间在目标库有，但缺少权限。会将表创建到对应表空间，但数据不能导入。
3.18C grant connect,resource to user 后，不需要再revoke unlimited tablespace ,默认就不给该系统权限。而这在11G及以前都是需要回收的。

不知道12C有没有该特性，也不需要关心，以后肯定是19C的天下。

测试案例

1. 创建导出文件

test 用了4个表空间

sqlplus / as sysdba

create tablespace users1;

create tablespace users2;

create tablespace users3;

create tablespace users4;

Create user test identified by test default tablespace users1;

grant connect,resource to test;

conn test/test

create table tu1 tablespace users1 as select * from all_tables;

create table tu2 tablespace users2 as select * from all_tables;

create table tu3 tablespace users3 as select * from all_tables;

create table tu4 tablespace users4 as select * from all_tables;

exp test/test file=test.dmp

2. 在11G导入

create user test11g identified by test11g default tablespace users1;

grant connect,resource to test11g;

revoke unlimited tablespace from test11g;

alter user test11g quota unlimited on users1;

alter user test11g quota unlimited on users2;

User created.

SQL>

Grant succeeded.

SQL>

Revoke succeeded.

SQL>

User altered.

SQL>

User altered.

SQL>

SQL> quit

Disconnected from Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production

With the Partitioning, OLAP, Data Mining and Real Application Testing options

[oracle@oracle ~]$ imp test11g/test11g file=test.dmp log=test11g.log fromuser=test touser=test11g

Import: Release 11.2.0.4.0 - Production on Sat May 25 08:11:54 2019

Copyright (c) 1982, 2011, Oracle and/or its affiliates. All rights reserved.

Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production

With the Partitioning, OLAP, Data Mining and Real Application Testing options

Export file created by EXPORT:V11.02.00 via conventional path

Warning: the objects were exported by TEST, not by you

import done in ZHS16GBK character set and AL16UTF16 NCHAR character set

import server uses AL32UTF8 character set (possible charset conversion)

. . importing table "TU1" 103 rows imported

. . importing table "TU2" 104 rows imported

. . importing table "TU3"

IMP-00058: ORACLE error 1950 encountered

ORA-01950: no privileges on tablespace 'USERS3'

. . importing table "TU4"

IMP-00058: ORACLE error 1950 encountered

ORA-01950: no privileges on tablespace 'USERS4'

Import terminated successfully with warnings.

TU1/TU2 顺利导入

TU3/TU4 因为表空间权限问题导入失败，检查：

SQL> conn test11g/test11g

Connected.

SQL> select TABLE_NAME,TABLESPACE_NAME from user_tables;

TABLE_NAME                     TABLESPACE_NAME

------------------------------ ------------------------------

TU1                            USERS1

TU2                            USERS2

TU3                            USERS3

TU4                            USERS4

SQL> select count(1) from tu1;

  COUNT(1)

----------

       103

SQL> select count(1) from tu2;

  COUNT(1)

----------

       104

SQL> select count(1) from tu3;

  COUNT(1)

----------

         0

SQL> select count(1) from tu4;

  COUNT(1)

----------

         0

虽然对users3/users4 表空间无权限，但其实表还是创建了的，只是数据不能导入。

3. 在19C导入

创建表空间和用户

users1/users2,  users3/users4不创建

users1 设为默认表空间，不授权访问users2



sqlplus / as sysdba


alter session set container=pdb;
create tablespace users1 datafile '/u01/app/oracle/oradata/ORCL19C/pdb/users101.dbf' size 5m;
create tablespace users2 datafile '/u01/app/oracle/oradata/ORCL19C/pdb/users102.dbf' size 5m;
create user test19c identified by test19c default tablespace users1;
grant connect,resource to test19c;
revoke unlimited tablespace from test19c;
alter user test19c quota unlimited on users1;






[oracle@orcl19C ~]$ sqlplus / as sysdba

SQL*Plus: Release 19.0.0.0.0 - Production on Sat May 25 10:13:47 2019

Version 19.3.0.0.0

Copyright (c) 1982, 2019, Oracle.  All rights reserved.

Connected to:

Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production

Version 19.3.0.0.0

SQL> alter session set container=pdb;

create tablespace users1 datafile '/u01/app/oracle/oradata/ORCL19C/pdb/users101.dbf' size 5m;

create tablespace users2 datafile '/u01/app/oracle/oradata/ORCL19C/pdb/users102.dbf' size 5m;

create user test19c identified by test19c default tablespace users1;

grant connect,resource to test19c;

revoke unlimited tablespace from test19c;

Session altered.

SQL> alter user test19c quota unlimited on users1;

Tablespace created.

SQL>

Tablespace created.

SQL>

User created.

SQL>

Grant succeeded.

SQL> revoke unlimited tablespace from test19c

*

ERROR at line 1:

ORA-01952: system privileges not granted to 'TEST19C'

SQL>

User altered.




ORA-01952: system privileges not granted to 'TEST19C'  19C没有被授予 UNLIMITED TABLESPACE 系统权限。



导入数据到19C




[oracle@orcl19C ~]$ imp test19c/test19c@ORCL19CPDB file=test.dmp log=test19c.log fromuser=test touser=test19c

Import: Release 19.0.0.0.0 - Production on Sat May 25 10:18:27 2019

Version 19.3.0.0.0

Copyright (c) 1982, 2019, Oracle and/or its affiliates.  All rights reserved.

Connected to: Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production

Version 19.3.0.0.0

Export file created by EXPORT:V11.02.00 via conventional path

Warning: the objects were exported by TEST, not by you

import done in ZHS16GBK character set and AL16UTF16 NCHAR character set

. . importing table                          "TU1"        103 rows imported

. . importing table                          "TU2"

IMP-00058: ORACLE error 1950 encountered

ORA-01950: no privileges on tablespace 'USERS2'

. . importing table                          "TU3"        105 rows imported

. . importing table                          "TU4"        106 rows imported

Import terminated successfully with warnings.

[oracle@orcl19C ~]$ sqlplus test19c/test19c@ORCL19CPDB

SQL*Plus: Release 19.0.0.0.0 - Production on Sat May 25 10:20:18 2019

Version 19.3.0.0.0

Copyright (c) 1982, 2019, Oracle.  All rights reserved.

Last Successful login time: Sat May 25 2019 10:18:30 -04:00

Connected to:

Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production

Version 19.3.0.0.0

SQL> col tablespace_name for a30

SQL> col table_name for a30

SQL> select TABLE_NAME,TABLESPACE_NAME from user_tables;

TABLE_NAME                     TABLESPACE_NAME

------------------------------ ------------------------------

TU1                            USERS1

TU2                            USERS2

TU3                            USERS1

TU4                            USERS1

SQL> select count(1) from TU1 union all

  2  select count(1) from TU2 union all

  3  select count(1) from TU3 union all

  4  select count(1) from TU4 ;

  COUNT(1)

----------

       103

         0

       105

       106




由上可知，在19C中


1. 表空间不存在时，imp 会把数据导入到默认表空间。而在11G或以前表空间不存在，导入会报错，只能导入到与源库相同的表空间名下。


2. 表空间都存在时，且有权限时。数据将导入到与源库相同的表空间


3.部分表空间缺失权限，表会创建在与源库相同的表空间，但因为缺少权限数据不能导入。


 
												


											
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