间隔分区表导出指定的分区数据

180大表备份处理方法：

准备备份空间：

SQL> conn zy/xxx

已连接。

SQL> create or replace directory bak as ‘/bak/dmp180’;

目录已创建。

SQL> grant read,write on directory bak to public;

授权成功。

SQL> exit

查看最大分区表数据：

SEGMENT_NAMESUM(BYTES)/1024/1024/1024

1 IPTV_ZTE_DATA 751

2 IPTV_HW_DATA 266

3 AAA_DATA 63

4 KD_HW_DATA 39

5 HJLL_ONLINE_DATA38

6 HJJL_LIULIANG_DATA21

7 KD_FH_DATA 6

参考语句zy用户下：

select segment_name,sum(bytes)/1024/1024/1024 from user_segments

where segment_type in(‘TABLE PARTITION’) group by segment_name order by sum(bytes) desc;

确认可清理备份的数据：

select * from IPTV_ZTE_DATA where currenttime

select * from IPTV_HW_DATA where PCF_TIMESTAMP

select * from AAA_DATA where inserttime

select * from KD_HW_DATA where inserttime

select * from HJLL_ONLINE_DATA where inserttime

select * from HJJL_LIULIANG_DATA where INSERTTIME

select * from KD_FH_DATA where INSERTTIME

准备导出备份脚本：

通过pl/sql 查看分区结构，查看对应表2018年3月1日之前的分区名称

或者通过如下语句查询：

SELECT *FROM (SELECT TABLE_OWNER,TABLE_NAME,PARTITION_NAME, substr(LONG_HELP.SUBSTR_OF('SELECT HIGH_VALUEFROM DBA_TAB_PARTITIONS WHERE TABLE_OWNER=:TABLE_OWNER AND TABLE_NAME=:TABLE_NAMEAND PARTITION_NAME=:PARTITION_NAME', 1, 4000, 'TABLE_OWNER', TABLE_OWNER, 'TABLE_NAME', TABLE_NAME, 'PARTITION_NAME', PARTITION_NAME),11,19) HIGH_VALUE FROM DBA_TAB_PARTITIONS where table_name in('IPTV_ZTE_DATA','IPTV_HW_DATA','AAA_DATA','KD_HW_DATA','HJLL_ONLINE_DATA','HJJL_LIULIANG_DATA','KD_FH_DATA') ) b where b.high_value='2018-02-28 00:00:00' order by HIGH_VALUE;

函数准备：

create or replace package long_helpauthid current_userasfunction substr_of( p_query in varchar2,p_fromin number,p_for in number,p_name1 in varchar2 default NULL,p_bind1 in varchar2 default NULL,p_name2 in varchar2 default NULL,p_bind2 in varchar2 default NULL,p_name3 in varchar2 default NULL,p_bind3 in varchar2 default NULL,p_name4 in varchar2 default NULL,p_bind4 in varchar2 default NULL )return varchar2;end;/create or replace package body long_helpasg_cursor number := dbms_sql.open_cursor;g_queryvarchar2(32765);procedure bind_variable( p_name in varchar2, p_value in varchar2 )isbeginif ( p_name is not null )thendbms_sql.bind_variable( g_cursor, p_name, p_value );end if;end;function substr_of( p_query in varchar2,p_fromin number,p_for in number,p_name1 in varchar2 default NULL,p_bind1 in varchar2 default NULL,p_name2 in varchar2 default NULL,p_bind2 in varchar2 default NULL,p_name3 in varchar2 default NULL,p_bind3 in varchar2 default NULL,p_name4 in varchar2 default NULL,p_bind4 in varchar2 default NULL )return varchar2asl_buffer varchar2(4000);l_buffer_len number;beginif ( nvl(p_from,0) = 1 (positive numbers)' );end if;if ( nvl(p_for,0) not between 1 and 4000 )thenraise_application_error(-20003, 'For must be between 1 and 4000' );end if;if ( p_query  g_query or g_query is NULL )thenif ( upper(trim(nvl(p_query,'x'))) not like 'SELECT%')thenraise_application_error(-20001, 'This must be a select only' );end if;dbms_sql.parse( g_cursor, p_query, dbms_sql.native );g_query := p_query;end if;bind_variable( p_name1, p_bind1 );bind_variable( p_name2, p_bind2 );bind_variable( p_name3, p_bind3 );bind_variable( p_name4, p_bind4 );dbms_sql.define_column_long(g_cursor, 1);if (dbms_sql.execute_and_fetch(g_cursor)>0)thendbms_sql.column_value_long(g_cursor, 1, p_for, p_from-1, l_buffer, l_buffer_len );end if;return l_buffer;end substr_of;end;/

expdp zy/xxx directory=bak tables=IPTV_HW_DATA dumpfile=IPTV_HW_DATA_201803.dmp logfile=IPTV_HW_DATA_201803.log parfile=IPTV_HW_DATA_201803.par

文件IPTV_HW_DATA_201803.par内容：

EXCLUDE=STATISTICS,INDEX,TABLE_DATA:”IN (select partition_name from (select partition_name,to_number(substr(partition_name,instr(partition_name,’_P’,-1)+2)) n from user_tab_partitions a where a.table_name=’IPTV_HW_DATA’) b where b.n>20759)”

expdp zy/xxx directory=bak tables=IPTV_ZTE_DATA dumpfile=IPTV_ZTE_DATA_201803.dmp logfile=IPTV_ZTE_DATA_201803.log parfile=IPTV_ZTE_DATA_201803.par

文件IPTV_ZTE_DATA_201803.par内容：

EXCLUDE=STATISTICS,INDEX,TABLE_DATA:”IN (select partition_name from (select partition_name,to_number(substr(partition_name,instr(partition_name,’_P’,-1)+2)) n from user_tab_partitions a where a.table_name=’IPTV_ZTE_DATA’) b where b.n>20760)”

nohup ./xxx.sh > ./xxx.out &

准备清理分区脚本：

select ‘alter table AAA_DATA drop partition ‘||partition_name|| ‘;’ from (select partition_name,to_number(substr(partition_name,instr(partition_name,’_P’,-1)+2)) n from user_tab_partitions a where a.table_name=’AAA_DATA’) b where b.n<=20624 order by b.n

查看索引状态：（本地索引不受drop分区影响）

select a.index_name,a.partition_name,a.status from user_ind_partitions a,user_indexes b

where a.index_name=b.index_name and b.table_name=’KD_FH_DATA’ and a.status’USABLE’