文档课题：分区表的导出导入测试.
数据库：oracle 19.13
系统：rhel 7.9 64位
环境介绍：单实例 + 多租户
1、数据准备
SQL> show pdbs
CON_ID CON_NAME OPEN MODE RESTRICTED
---------- ------------------------------ ---------- ----------
2 PDB$SEED READ ONLY NO
3 ADTPDB READ WRITE NO
SQL> alter session set container=adtpdb;
Session altered.
SQL> create user sms identified by sms;
User created.
SQL> grant dba to sms;
Grant succeeded.
SQL> conn sms/sms@adtpdb
Connected.
SQL> create table sales(
2 product_id varchar2(5),sales_count number(10,2)
3 )
4 partition by range(sales_count)
5 (
6 partition p1 values less than(1000),
7 partition p2 values less than(2000),
8 partition p3 values less than(3000)
9 );
Table created.
SQL> col TABLE_OWNER for a15
SQL> col TABLE_NAME for a15
SQL> col PARTITION_NAME for a15
SQL> col high_value for a15
SQL> set line 200
SQL> select table_owner,table_name,partition_name,high_value,partition_position from dba_tab_partitions u where u.table_name='SALES'
TABLE_OWNER TABLE_NAME PARTITION_NAME HIGH_VALUE PARTITION_POSITION
--------------- --------------- --------------- --------------- ------------------
SMS SALES P1 1000 1
SMS SALES P2 2000 2
SMS SALES P3 3000 3
SQL> insert into sales values('1',600);
1 row created.
SQL> insert into sales values('2',1000);
1 row created.
SQL> insert into sales values('3',2300);
1 row created.
SQL> alter table sales add partition p4 values less than(maxvalue);
Table altered.
SQL> insert into sales values('4',6000);
1 row created.
SQL> commit;
Commit complete.
SQL> select * from sales partition (p1);
PRODU SALES_COUNT
----- -----------
1 600
SQL> select * from sales partition (p2);
PRODU SALES_COUNT
----- -----------
2 1000
SQL> select * from sales partition (p3);
PRODU SALES_COUNT
----- -----------
3 2300
SQL> select * from sales partition (p4);
PRODU SALES_COUNT
----- -----------
4 6000
2、导出数据
说明：现对P1分区做expdp导出.
SQL> conn sys/oracle_4U@adtpdb as sysdba
Connected.
SQL> create directory expdp_dir as '/home/oracle';
Directory created.
SQL> grant read,write on directory expdp_dir to sms;
Grant succeeded.
[oracle@ora-leo-19cs ~]$ expdp sms/sms@adtpdb directory=expdp_dir dumpfile=partition_p1.dmp tables=sales:p1 logfile=expdp_p1.log
Export: Release 19.0.0.0.0 - Production on Wed Jan 31 21:20:09 2024
Version 19.13.0.0.0
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
Starting "SMS"."SYS_EXPORT_TABLE_01": sms/********@adtpdb directory=expdp_dir dumpfile=partition_p1.dmp tables=sales:p1 logfile=expdp_p1.log
Processing object type TABLE_EXPORT/TABLE/TABLE_DATA
Processing object type TABLE_EXPORT/TABLE/STATISTICS/TABLE_STATISTICS
Processing object type TABLE_EXPORT/TABLE/STATISTICS/MARKER
Processing object type TABLE_EXPORT/TABLE/TABLE
. . exported "SMS"."SALES":"P1" 5.539 KB 1 rows
Master table "SMS"."SYS_EXPORT_TABLE_01" successfully loaded/unloaded
******************************************************************************
Dump file set for SMS.SYS_EXPORT_TABLE_01 is:
/home/oracle/partition_p1.dmp
Job "SMS"."SYS_EXPORT_TABLE_01" successfully completed at Wed Jan 31 21:20:27 2024 elapsed 0 00:00:15
3、验证备份集
--使用如下SQL确认产生的文件为expdp备份集.
SQL> conn sms/sms@adtpdb
Connected.
SQL> set serveroutput on
SQL> declare
2 v_filetype NUMBER; -- 0=unknown 1=expdp 2=exp 3=ext
3 v_info_table sys.ku$_dumpfile_info; -- PL/SQL table with file info
4 begin
5 dbms_datapump.get_dumpfile_info(filename => 'partition_p1.dmp',
6 directory => upper('impdp_dir'),
7 info_table => v_info_table,
8 filetype => v_filetype);
9 dbms_output.put_line('Filetype : ' || v_filetype);
10 end;
11 /
Filetype : 1
4、删除表分区
说明：现将sms.sales表的P1分区删除.
SQL> conn sms/sms@adtpdb
Connected.
SQL> alter table sales drop partition p1;
Table altered.
SQL> col TABLE_OWNER for a15
SQL> col TABLE_NAME for a15
SQL> col PARTITION_NAME for a15
SQL> col high_value for a15
SQL> set line 200
SQL> select table_owner,table_name,partition_name,high_value,partition_position from dba_tab_partitions u where u.table_name='SALES';
TABLE_OWNER TABLE_NAME PARTITION_NAME HIGH_VALUE PARTITION_POSITION
--------------- --------------- --------------- --------------- ------------------
SMS SALES P2 2000 1
SMS SALES P3 3000 2
SMS SALES P4 MAXVALUE 3
5、表分区恢复
说明：现对表分区使用impdp进行恢复.
SQL> create directory impdp_dir as '/home/oracle/dumpfile';
Directory created.
SQL> grant read,write on directory impdp_dir to sms;
Grant succeeded.
[oracle@ora-leo-19cs ~]$ mv partition_p1.dmp dumpfile
[oracle@ora-leo-19cs ~]$ ll dumpfile
total 188
-rw-r----- 1 oracle oinstall 192512 Jan 31 21:20 partition_p1.dmp
[oracle@ora-leo-19cs ~]$ vi impdp.sh
impdp sms/sms@adtpdb \
directory=impdp_dir \
remap_schema=SMS:SMS \
remap_table=sales:sales_20240203 \
dumpfile=partition_p1.dmp
logfile=impdp_sales#p1.log \
job_name=sales#p1 \
transform=disable_archive_logging:Y \
table_exists_action=append \
parallel=8
说明：若是集群环境需添加cluster=N参数.
[oracle@ora-leo-19cs ~]$ sh impdp.sh &
[oracle@ora-leo-19cs dumpfile]$ pwd
/home/oracle/dumpfile
[oracle@ora-leo-19cs dumpfile]$ ls -ltr
total 192
-rw-r----- 1 oracle oinstall 192512 Jan 31 21:20 partition_p1.dmp
-rw-r--r-- 1 oracle oinstall 988 Feb 3 17:46 impdp_sales#p1.log
[oracle@ora-leo-19cs dumpfile]$ cat impdp_sales#p1.log
;;;
Import: Release 19.0.0.0.0 - Production on Sat Feb 3 17:46:31 2024
Version 19.13.0.0.0
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
Master table "SMS"."SALES#P1" successfully loaded/unloaded
Starting "SMS"."SALES#P1": sms/********@adtpdb directory=impdp_dir remap_schema=SMS:SMS remap_table=sales:sales_20240203 dumpfile=partition_p1.dmp logfile=impdp_sales#p1.log job_name=sales#p1 transform=disable_archive_logging:Y table_exists_action=append parallel=8
Processing object type TABLE_EXPORT/TABLE/TABLE
Processing object type TABLE_EXPORT/TABLE/TABLE_DATA
. . imported "SMS"."SALES_20240203":"P1" 5.539 KB 1 rows
Processing object type TABLE_EXPORT/TABLE/STATISTICS/TABLE_STATISTICS
Processing object type TABLE_EXPORT/TABLE/STATISTICS/MARKER
Job "SMS"."SALES#P1" successfully completed at Sat Feb 3 17:46:54 2024 elapsed 0 00:00:22
6、数据验证
[oracle@ora-leo-19cs dumpfile]$ sqlplus sms/sms@adtpdb
SQL*Plus: Release 19.0.0.0.0 - Production on Sat Feb 3 17:49:25 2024
Version 19.13.0.0.0
Copyright (c) 1982, 2021, Oracle. All rights reserved.
Last Successful login time: Sat Feb 03 2024 17:46:31 +08:00
Connected to:
Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production
Version 19.13.0.0.0
SQL> col table_name for a15
SQL> col partition_name for a20
SQL> col high_value for a20
SQL> set line 200
SQL> r
1* select table_name,partition_name,high_value,partition_position from user_tab_partitions where table_name='SALES_20240203'
TABLE_NAME PARTITION_NAME HIGH_VALUE PARTITION_POSITION
--------------- -------------------- -------------------- ------------------
SALES_20240203 P1 1000 1
SALES_20240203 P2 2000 2
SALES_20240203 P3 3000 3
SALES_20240203 P4 MAXVALUE 4
SQL> select * from sales_20240203 partition(p1);
PRODU SALES_COUNT
----- -----------
1 600
SQL> select * from sales_20240203 partition(p2);
no rows selected
SQL> select * from sales_20240203 partition(p3);
no rows selected
SQL> select * from sales_20240203 partition(p4);
no rows selected
说明：数据成功恢复到sales_20240203临时表. 0
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分区表的导出导入测试
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