oracleimpdp的table

1 table_exists_action參數(shù)說明 使用imp進(jìn)行數(shù)據(jù)導(dǎo)入時，若表已經(jīng)存在，要先drop掉表，再進(jìn)行導(dǎo)入。 而使用impdp完成數(shù)據(jù)庫導(dǎo)入時，若表已經(jīng)存在，有四種的處理方式： 1) skip：默認(rèn)操作 2) replace：先drop表，然后創(chuàng)建表，最后插入數(shù)據(jù) 3) append：在原來

1 table_exists_action參數(shù)說明

使用imp進(jìn)行數(shù)據(jù)導(dǎo)入時，若表已經(jīng)存在，要先drop掉表，再進(jìn)行導(dǎo)入。

而使用impdp完成數(shù)據(jù)庫導(dǎo)入時，若表已經(jīng)存在，有四種的處理方式：

1) skip：默認(rèn)操作

2) replace：先drop表，然后創(chuàng)建表，最后插入數(shù)據(jù)

3) append：在原來數(shù)據(jù)的基礎(chǔ)上增加數(shù)據(jù)

4) truncate：先truncate，然后再插入數(shù)據(jù)

2 實驗預(yù)備

2.1 sys用戶創(chuàng)建目錄對象，并授權(quán)

SQL> create directory dir_dump as '/home/oracle';

Directory created

SQL> grant read, write on directory dir_dump to tuser;

Grant succeeded

2.2 導(dǎo)出數(shù)據(jù)

[oracle@cent4 ~]$ expdp tuser/tuser directory=dir_dump dumpfile=expdp.dmp schemas=tuser;

Export: Release 10.2.0.1.0 - 64bit Production on 星期五, 06 1月, 2012 20:44:22

Copyright (c) 2003, 2005, Oracle. All rights reserved.

Connected to: Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - 64bit Production

With the Partitioning, OLAP and Data Mining options

Starting "TUSER"."SYS_EXPORT_SCHEMA_01": tuser/******** directory=dir_dump dumpfile=expdp.dmp schemas=tuser

Estimate in progress using BLOCKS method...

Processing object type SCHEMA_EXPORT/TABLE/TABLE_DATA

Total estimation using BLOCKS method: 128 KB

Processing object type SCHEMA_EXPORT/PRE_SCHEMA/PROCACT_SCHEMA

Processing object type SCHEMA_EXPORT/TABLE/TABLE

Processing object type SCHEMA_EXPORT/TABLE/INDEX/INDEX

Processing object type SCHEMA_EXPORT/TABLE/CONSTRAINT/CONSTRAINT

Processing object type SCHEMA_EXPORT/TABLE/INDEX/STATISTICS/INDEX_STATISTICS

Processing object type SCHEMA_EXPORT/TABLE/COMMENT

. . exported "TUSER"."TAB1" 5.25 KB 5 rows

. . exported "TUSER"."TAB2" 5.296 KB 10 rows

Master table "TUSER"."SYS_EXPORT_SCHEMA_01" successfully loaded/unloaded

******************************************************************************

Dump file set for TUSER.SYS_EXPORT_SCHEMA_01 is:

/home/oracle/expdp.dmp

Job "TUSER"."SYS_EXPORT_SCHEMA_01" successfully completed at 20:47:29

2.3 查看已有兩張表的數(shù)據(jù)

SQL> select * from tab1;

A B

--- ----

1 11

2 22

3 33

4 44

5 55

SQL> select * from tab2;

A B

--- ----

1 aa

2 bb

3 cc

4 dd

5 ee

6 ff

7 gg

8 hh

9 ii

10 jj

10 rows selected

3 replace

3.1 插入數(shù)據(jù)

SQL> insert into tab1 (a, b) values (6, 66);

1 row inserted

SQL> commit;

Commit complete

SQL> select * from tab1;

A B

--- ----

1 11

2 22

3 33

4 44

5 55

6 66

6 rows selected

3.2 導(dǎo)入數(shù)據(jù)

[oracle@cent4 ~]$ impdp tuser/tuser directory=dir_dump dumpfile=expdp.dmp schemas=tuser table_exists_action=replace;

Import: Release 10.2.0.1.0 - 64bit Production on 星期五, 06 1月, 2012 20:53:09

Copyright (c) 2003, 2005, Oracle. All rights reserved.

Connected to: Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - 64bit Production

With the Partitioning, OLAP and Data Mining options

Master table "TUSER"."SYS_IMPORT_SCHEMA_01" successfully loaded/unloaded

Starting "TUSER"."SYS_IMPORT_SCHEMA_01": tuser/******** directory=dir_dump dumpfile=expdp.dmp schemas=tuser table_exists_action=replace

Processing object type SCHEMA_EXPORT/PRE_SCHEMA/PROCACT_SCHEMA

Processing object type SCHEMA_EXPORT/TABLE/TABLE

Processing object type SCHEMA_EXPORT/TABLE/TABLE_DATA

. . imported "TUSER"."TAB1" 5.25 KB 5 rows

. . imported "TUSER"."TAB2" 5.296 KB 10 rows

Processing object type SCHEMA_EXPORT/TABLE/INDEX/INDEX

Processing object type SCHEMA_EXPORT/TABLE/CONSTRAINT/CONSTRAINT

Processing object type SCHEMA_EXPORT/TABLE/INDEX/STATISTICS/INDEX_STATISTICS

Job "TUSER"."SYS_IMPORT_SCHEMA_01" successfully completed at 20:53:25

3.3 再查看數(shù)據(jù)

SQL> select * from tab1;

A B

--- ----

1 11

2 22

3 33

4 44

5 55

查看數(shù)據(jù)，這時沒有第六條數(shù)據(jù)。

另外新建的表，在備份中沒有，這個表并不會被覆蓋。

4 skip

drop表tab1，tab2。

[oracle@cent4 ~]$ impdp tuser/tuser directory=dir_dump dumpfile=expdp.dmp schemas=tuser;

Import: Release 10.2.0.1.0 - 64bit Production on 星期五, 06 1月, 2012 21:34:20

Copyright (c) 2003, 2005, Oracle. All rights reserved.

Connected to: Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - 64bit Production

With the Partitioning, OLAP and Data Mining options

Master table "TUSER"."SYS_IMPORT_SCHEMA_01" successfully loaded/unloaded

Starting "TUSER"."SYS_IMPORT_SCHEMA_01": tuser/******** directory=dir_dump dumpfile=expdp.dmp schemas=tuser

Processing object type SCHEMA_EXPORT/PRE_SCHEMA/PROCACT_SCHEMA

Processing object type SCHEMA_EXPORT/TABLE/TABLE

Processing object type SCHEMA_EXPORT/TABLE/TABLE_DATA

. . imported "TUSER"."TAB1" 5.25 KB 5 rows

. . imported "TUSER"."TAB2" 5.296 KB 10 rows

Processing object type SCHEMA_EXPORT/TABLE/INDEX/INDEX

Processing object type SCHEMA_EXPORT/TABLE/CONSTRAINT/CONSTRAINT

Processing object type SCHEMA_EXPORT/TABLE/INDEX/STATISTICS/INDEX_STATISTICS

Job "TUSER"."SYS_IMPORT_SCHEMA_01" successfully completed at 21:34:25

注意：即使表結(jié)構(gòu)發(fā)生了變化，只要表名不發(fā)生變化。導(dǎo)入這個表時，就會被跳過。

5 append

5.1 刪除部分?jǐn)?shù)據(jù)

SQL> delete tab1 where a = 1;

1 row deleted

SQL> delete tab2 where a = 2;

1 row deleted

SQL> commit;

Commit complete

SQL> select * from tab1;

A B

--- ----

2 22

3 33

4 44

5 55

SQL> select * from tab2;

A B

--- ----

1 aa

3 cc

4 dd

5 ee

6 ff

7 gg

8 hh

9 ii

10 jj

9 rows selected

5.2 導(dǎo)入數(shù)據(jù)

[oracle@cent4 ~]$ impdp tuser/tuser directory=dir_dump dumpfile=expdp.dmp schemas=tuser table_exists_action=append;

Import: Release 10.2.0.1.0 - 64bit Production on 星期五, 06 1月, 2012 21:50:40

Copyright (c) 2003, 2005, Oracle. All rights reserved.

Connected to: Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - 64bit Production

With the Partitioning, OLAP and Data Mining options

Master table "TUSER"."SYS_IMPORT_SCHEMA_01" successfully loaded/unloaded

Starting "TUSER"."SYS_IMPORT_SCHEMA_01": tuser/******** directory=dir_dump dumpfile=expdp.dmp schemas=tuser table_exists_action=append

Processing object type SCHEMA_EXPORT/PRE_SCHEMA/PROCACT_SCHEMA

Processing object type SCHEMA_EXPORT/TABLE/TABLE

ORA-39152: Table "TUSER"."TAB1" exists. Data will be appended to existing table but all dependent metadata will be skipped due to table_exists_action of append

ORA-39152: Table "TUSER"."TAB2" exists. Data will be appended to existing table but all dependent metadata will be skipped due to table_exists_action of append

Processing object type SCHEMA_EXPORT/TABLE/TABLE_DATA

ORA-31693: Table data object "TUSER"."TAB1" failed to load/unload and is being skipped due to error:

ORA-00001: unique constraint (TUSER.PK_TAB1) violated

ORA-31693: Table data object "TUSER"."TAB2" failed to load/unload and is being skipped due to error:

ORA-00001: unique constraint (TUSER.PK_TAB2) violated

Processing object type SCHEMA_EXPORT/TABLE/INDEX/INDEX

Processing object type SCHEMA_EXPORT/TABLE/CONSTRAINT/CONSTRAINT

Processing object type SCHEMA_EXPORT/TABLE/INDEX/STATISTICS/INDEX_STATISTICS

Job "TUSER"."SYS_IMPORT_SCHEMA_01" completed with 4 error(s) at 21:50:45

注意：只要append數(shù)據(jù)出錯，比如唯一鍵錯誤，這時什么數(shù)據(jù)都不能插入了。

5.3 修改表結(jié)構(gòu)

SQL> alter table tab1 add (C varchar2(4));

Table altered

5.4 再導(dǎo)入數(shù)據(jù)

[oracle@cent4 ~]$ impdp tuser/tuser directory=dir_dump dumpfile=expdp.dmp schemas=tuser table_exists_action=append;

Import: Release 10.2.0.1.0 - 64bit Production on 星期五, 06 1月, 2012 21:59:19

Copyright (c) 2003, 2005, Oracle. All rights reserved.

Connected to: Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - 64bit Production

With the Partitioning, OLAP and Data Mining options

Master table "TUSER"."SYS_IMPORT_SCHEMA_01" successfully loaded/unloaded

Starting "TUSER"."SYS_IMPORT_SCHEMA_01": tuser/******** directory=dir_dump dumpfile=expdp.dmp schemas=tuser table_exists_action=append

Processing object type SCHEMA_EXPORT/PRE_SCHEMA/PROCACT_SCHEMA

Processing object type SCHEMA_EXPORT/TABLE/TABLE

ORA-39152: Table "TUSER"."TAB1" exists. Data will be appended to existing table but all dependent metadata will be skipped due to table_exists_action of append

ORA-39152: Table "TUSER"."TAB2" exists. Data will be appended to existing table but all dependent metadata will be skipped due to table_exists_action of append

Processing object type SCHEMA_EXPORT/TABLE/TABLE_DATA

ORA-39014: One or more workers have prematurely exited.

ORA-39029: worker 1 with process name "DW01" prematurely terminated

ORA-31671: Worker process DW01 had an unhandled exception.

ORA-00600: internal error code, arguments: [qerxtAgentOpen_911], [3], [2], [], [], [], [], []

ORA-06512: at "SYS.KUPW$WORKER", line 1345

ORA-06512: at line 2

Job "TUSER"."SYS_IMPORT_SCHEMA_01" stopped due to fatal error at 21:59:57

這時居然出現(xiàn)600錯誤。

6 truncate

6.1 插入部分?jǐn)?shù)據(jù)

SQL> insert into tab1 (a, b) values (6, 66);

1 row inserted

SQL> commit;

Commit complete

6.2 導(dǎo)入數(shù)據(jù)

[oracle@cent4 ~]$ impdp tuser/tuser directory=dir_dump dumpfile=expdp.dmp schemas=tuser table_exists_action=truncate;

Import: Release 10.2.0.1.0 - 64bit Production on 星期五, 06 1月, 2012 22:18:21

Copyright (c) 2003, 2005, Oracle. All rights reserved.

Connected to: Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - 64bit Production

With the Partitioning, OLAP and Data Mining options

Master table "TUSER"."SYS_IMPORT_SCHEMA_03" successfully loaded/unloaded

Starting "TUSER"."SYS_IMPORT_SCHEMA_03": tuser/******** directory=dir_dump dumpfile=expdp.dmp schemas=tuser table_exists_action=truncate

Processing object type SCHEMA_EXPORT/PRE_SCHEMA/PROCACT_SCHEMA

Processing object type SCHEMA_EXPORT/TABLE/TABLE

ORA-39153: Table "TUSER"."TAB1" exists and has been truncated. Data will be loaded but all dependent metadata will be skipped due to table_exists_action of truncate

ORA-39153: Table "TUSER"."TAB2" exists and has been truncated. Data will be loaded but all dependent metadata will be skipped due to table_exists_action of truncate

Processing object type SCHEMA_EXPORT/TABLE/TABLE_DATA

. . imported "TUSER"."TAB1" 5.25 KB 5 rows

. . imported "TUSER"."TAB2" 5.296 KB 10 rows

Processing object type SCHEMA_EXPORT/TABLE/INDEX/INDEX

Processing object type SCHEMA_EXPORT/TABLE/CONSTRAINT/CONSTRAINT

Processing object type SCHEMA_EXPORT/TABLE/INDEX/STATISTICS/INDEX_STATISTICS

Job "TUSER"."SYS_IMPORT_SCHEMA_03" completed with 2 error(s) at 22:18:28

注意：新插入的數(shù)據(jù)將丟失。

6.3 改表結(jié)構(gòu)

SQL> alter table tab1 add (C varchar2(4));

Table altered

6.4 再導(dǎo)入數(shù)據(jù)

[oracle@cent4 ~]$ impdp tuser/tuser directory=dir_dump dumpfile=expdp.dmp schemas=tuser table_exists_action=truncate;

Import: Release 10.2.0.1.0 - 64bit Production on 星期五, 06 1月, 2012 22:22:02

Copyright (c) 2003, 2005, Oracle. All rights reserved.

Connected to: Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - 64bit Production

With the Partitioning, OLAP and Data Mining options

Master table "TUSER"."SYS_IMPORT_SCHEMA_03" successfully loaded/unloaded

Starting "TUSER"."SYS_IMPORT_SCHEMA_03": tuser/******** directory=dir_dump dumpfile=expdp.dmp schemas=tuser table_exists_action=truncate

Processing object type SCHEMA_EXPORT/PRE_SCHEMA/PROCACT_SCHEMA

Processing object type SCHEMA_EXPORT/TABLE/TABLE

ORA-39153: Table "TUSER"."TAB1" exists and has been truncated. Data will be loaded but all dependent metadata will be skipped due to table_exists_action of truncate

ORA-39153: Table "TUSER"."TAB2" exists and has been truncated. Data will be loaded but all dependent metadata will be skipped due to table_exists_action of truncate

Processing object type SCHEMA_EXPORT/TABLE/TABLE_DATA

ORA-39014: One or more workers have prematurely exited.

ORA-39029: worker 1 with process name "DW01" prematurely terminated

ORA-31671: Worker process DW01 had an unhandled exception.

ORA-00600: internal error code, arguments: [qerxtAgentOpen_911], [3], [2], [], [], [], [], []

ORA-06512: at "SYS.KUPW$WORKER", line 1345

ORA-06512: at line 2

Job "TUSER"."SYS_IMPORT_SCHEMA_03" stopped due to fatal error at 22:22:42

此時，一樣也發(fā)生了600錯誤?？磥韺?dǎo)入導(dǎo)出前后的表結(jié)構(gòu)不能發(fā)生變化。

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